RAD Data comm Modem HCD E1 User Guide

HCD-E1  
HDSL CSU/DSU  
Installation and Operation Manual  
Notice  
This manual contains information that is proprietary to RAD Data Communications. No part of this  
publication may be reproduced in any form whatsoever without prior written approval by RAD Data  
Communications.  
No representation or warranties for fitness for any purpose other than what is specifically mentioned in  
this manual is made either by RAD Data Communications or its agents.  
For further information contact RAD Data Communications at the address below or contact your local  
distributor.  
International Headquarters  
U.S. Headquarters  
RAD Data Communications Ltd.  
RAD Data Communications Inc.  
24 Raoul Wallenberg St.  
Tel Aviv 69719 Israel  
Tel: 972-3-6458181  
Fax: 972-3-6498250  
900 Corporate Drive  
Mahwah, NJ 07430 USA  
Tel: (201) 529-1100  
Toll free: 1-800-444-7234  
Fax: (201) 529-5777  
© 2001 RAD Data Communications  
Publication No. 174-200-01/01  
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Warranty  
This RAD product is warranted against defects in material and workmanship for a period of one year  
from date of shipment. During the warranty period, RAD will, at its option, either repair or replace  
products which prove to be defective. For warranty service or repair, this product must be returned to  
a service facility designated by RAD. Buyer shall prepay shipping charges to RAD and RAD shall pay  
shipping charges to return the product to Buyer. However, Buyer shall pay all shipping charges, duties  
and taxes for products returned to RAD from another country.  
Limitation of Warranty  
The foregoing warranty shall not apply to defects resulting from improper or inadequate maintenance  
by Buyer, Buyer-supplied firmware or interfacing, unauthorized modification or misuse, operation  
outside of the environmental specifications for the product, or improper site preparation or  
maintenance.  
Exclusive Remedies  
The remedies provided herein are the Buyer’s sole and exclusive remedies. RAD shall not be liable for  
any direct, indirect special, incidental, or consequential damages, whether based on contract, tort, or  
any legal theory.  
Safety Warnings  
The exclamation point within a triangle is intended to warn the operator or  
service personnel of operation and maintenance factors relating to the  
product and its operating environment which could pose a safety hazard.  
Always observe standard safety precautions during installation, operation and maintenance of this  
product. Only a qualified and authorized service personnel should carry out adjustment, maintenance  
or repairs to this instrument. No adjustment, maintenance or repairs should be performed by either the  
operator or the user.  
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Telecommunication Safety  
The safety status of each of the ports on HCD-E1 are declared according to EN41003 and is detailed in  
the table below. Interconnection of these ports with other apparatus should be made such that the  
equipment continues to comply with clause 2.3 of EN60950 for SELV circuits after such a connection is  
made.  
Ports  
Safety Status  
Data channels, unbalanced E1,  
supervisory port, alarm relay, LAN  
HDSL, balanced E1  
SELV  
Circuit operating with Safety Extra-Low Voltage  
TNV-1  
Circuit whose normal operating voltage is within  
the limits of SELV, on which overvoltages from  
Telecommunications Networks are possible.  
Regulatory Information  
FCC-15 User Information  
This equipment has been tested and found to comply with the limits of the Class A digital device,  
pursuant to Part 15 of the FCC rules. These limits are designed to provide reasonable protection against  
harmful interference when the equipment is operated in a commercial environment. This equipment  
generates, uses and can radiate radio frequency energy and, if not installed and used in accordance  
with the instruction manual, may cause harmful interference to the radio communications. Operation  
of this equipment in a residential area is likely to cause harmful interference in which case the user will  
be required to correct the interference at his own expense.  
Warning per EN 55022  
This is a Class A product. In a domestic environment, this product may cause radio interference, in  
which case the user may be required to take adequate measures.  
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Declaration of Conformity  
Manufacturer’s Name:  
RAD Data Communications Ltd.  
Manufacturer’s Address:  
24 Raoul Wallenberg St.  
Tel Aviv 69719  
Israel  
declares that the product:  
Product Name:  
HCD-E1  
Conforms to the following standard(s) or other normative document(s):  
EMC:  
EN 55022 (1994)  
Limits and methods of measurement of radio disturbance  
characteristics of information technology equipment.  
EN 50082-1 (1992)  
Electromagnetic compatibility – Generic immunity standards  
for residential, commercial and light industry.  
Safety:  
EN 60950 (1992/93) Safety of information technology equipment, including  
electrical business equipment.  
Supplementary Information:  
The product herewith complies with the requirements of the EMC Directive 89/336/EEC and the Low  
Voltage Directive 73/23/EEC. The product was tested in a typical configuration.  
Tel Aviv, August 4th, 1998  
Haim Karshen  
VP Quality  
European Contact: Rad Data Communications GmbH, Berner Strasse 77, 60437 Frankfurt am Main, Germany  
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Quick Start Guide  
Installation of HCD-E1 should be carried out only by an experienced  
technician. If you are familiar with RAD's HDSL modems, use this guide to  
prepare HCD-E1 for operation.  
1. Installing HCD-E1  
HCD-E1 contains two sets of jumpers:  
Main board internal jumpers and DIP switch  
E1 sublink interface board jumpers.  
Switch and  
Jumper Settings  
If you are using HCD-E1 as a central unit (LTU), you can use the default  
settings for the main board R/C jumper and DIP switch.  
If you are using HCD-E1 as a remote unit (NTU), do the following:  
1. Turn the unit off.  
2. Open the HCD-E1 case.  
3. Set the R/C jumper (JP4) to the R (remote) position.  
4. Set section 2 (DB INIT) of the S1 DIP switch to ON.  
5. Turn the unit on for a short time (until self-test is completed).  
6. Turn the unit off.  
7. Set section 2 (DB INIT) of the S1 DIP switch to OFF.  
8. Turn the unit on.  
If you are operating HCD-E1 with a balanced E1 interface, you can use the  
default settings of the sublink interface board jumpers.  
If you are using HCD-E1 with an unbalanced E1 interface, do the  
following:  
1. Turn the unit off.  
2. Open the HCD-E1 case.  
3. Identify and remove the three nuts that fasten the sublink interface  
board to the spacers.  
4. Remove the nuts and their washers.  
5. Disconnect the flat cable from the connector J10 on the main board.  
6. Hold the sublink interface board from its sides, and carefully pull it  
straight up. Once the board is free, turn the board over the rear panel,  
and let it rest on the work table. Do not strain the wires connecting  
the board to the BNC connectors.  
Installing HCD-E1  
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7. Set the JP12 jumper to UNBAL E1.  
8. Set the JP16 and JP17 jumpers to UNBAL.  
9. Connect the JP9 jumper.  
10. Install the JP8 and JP10 jumpers.  
11. Reinstall the sublink interface board by reversing the procedure by  
which you removed it. Pay special attention to the following:  
Mate correctly the flat cable connector with the corresponding  
main board connector.  
Make sure that the RJ-45 connector has been properly inserted  
into its place in the rear panel, and none of the BNC connectors  
wires have been damaged.  
Make sure to place the original washers under each nut. Fasten  
the nuts tightly.  
Connecting the E1 Sublink  
Connecting the  
Interfaces  
Connect the E1 sublink. For a balanced interface, use an RJ-45  
connector and connect it to the HCD-E1 port marked SUB E1. For an  
unbalanced interface, use two BNC connectors and connect them to  
the HCD-E1 ports marked RX OUT and TX IN.  
Connecting the Data Ports  
Connect the DTEs to the HCD-E1 data channel ports. Use the adapter  
cables supplied with the unit.  
Connecting the Line  
Connect the HDSL line to the HCD-E1 rear panel RJ-45 port designated  
HDSL.  
Connecting the Control Terminal  
If you are using a control terminal, connect a cable between the control  
terminal and the port designated CONTROL DCE.  
AC-Powered Unit  
Connecting the  
Power  
Use the 5 ft (1.5m) standard power cable provided with the unit. Make  
sure the ON/OFF switch on the rear panel is set to OFF, then connect  
the cable first to the HCD-E1 rear panel, then to the power source.  
DC-Powered Unit  
For the DC version of HCD-E1, refer to DC Power Supply Connection  
Supplement.  
2
Installing HCD-E1  
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Quick Start Guide  
2. Configuring HCD-E1  
You can configure and operate HCD-E1 from either the front panel or a  
supervisory terminal.  
Some of the HCD-E1 configuration parameters depend on the type of remote  
unit being used. Therefore, after the HDSL synchronization is reached, wait  
for about 1 minute before you start configuring the modem. This allows the  
proper recognition of the remote unit and ensures the correct HCD-E1  
configuration.  
Note  
To configure HCD-E1 from the front panel:  
Configuring  
HCD-E1 from  
Front Panel  
1. Scroll to the SYSTEM PARAMETER in the top row of the front-panel  
LCD and set the system parameters (available for the HCD-E1 unit  
configured as central).  
2. Scroll to SL PARAMETERS in the top row of the front panel LCD and  
configure the time slot allocation.  
3. Scroll to CHANNEL PRM in the top row of the front panel LCD and, for  
each data channel, configure the data rate, and time slot allocation.  
This command also allows you to set several other data transfer  
parameters, depending on whether or not the channel has an Ethernet  
interface.  
4. If your application explicitly requires the use of the unframed mode,  
select it under SL PARAMETERS or CHANNEL PRM. Make sure to  
assign all 32 times slots to the active port.  
5. Scroll to DNLOAD PRM in the top row of the front panel LCD and set  
the parameters for inband transmission of management data.  
The inband transfer of the management traffic is not available in the unframed  
mode.  
Note  
The remote unit automatically downloads the configuration of the central  
unit, unless the CONFIG REMOTE parameter in the SYSTEM PARAMETER  
screen of the central unit is set to NO.  
If you want to manage HCD-E1 from a remote supervisory terminal, you  
must prepare the unit by setting its control port parameters from the front  
panel:  
Configuring  
HCD-E1 from  
Control Terminal  
1. Scroll to SP PARAMETERS in the top row of the front panel LCD.  
2. Set the speed, data rate, parity, interface, and management mode  
parameters for the control port.  
To configure HCD-E1 from a control terminal:  
1. Configure the terminal as follows:  
Select full-duplex mode.  
Turn the terminal echo off.  
Disable any type of flow control.  
11/07/00 13:21  
Configuring HCD-E1  
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2. Connect the terminal to the CONTROL DCE port of HCD-E1.  
3. Press <Enter> three times.  
4. If the terminal displays the password prompt (PASSWORD>), enter the  
password. The default password is HCD. If the node number of  
HCD-E1 is a number other than zero, enter the node number along  
with the password. Use the following syntax:  
NODE<Space>’node number’<Space>’password’<Enter>  
If there is no password prompt, just enter the node number, followed  
by the desired command.  
The prompt HCD> appears.  
5. Select the control terminal type by entering the DEF TERM command.  
The default terminal type is VT-100. The other type options are VT-52,  
TV-920, FREEDOM-100, and FREEDOM-220. Use the following syntax  
to set the terminal type:  
DEF TERM<Space>‘terminal type’<Enter>  
If you enter DEF TERM without the terminal type, HCD-E1 resets all the  
control terminal codes to 0.  
Note  
If your terminal requires control sequences different from those used by  
the terminals listed above, type the command F and enter your terminal  
control sequences. If the current control codes are not compatible with  
your terminal and you cannot enter the desired codes, enter the INIT F  
command to reset the codes to 0, then use the F command to modify  
the control codes starting from the known field values.  
6. Set the following additional CONTROL DCE port parameters by  
entering the DEF SP command: password protection, idle disconnect  
time etc.  
7. Set the system parameters by entering the DEF SYS command.  
8. Set the sublink parameters by entering the DEF SL command.  
9. Configure the data channel parameters by entering the DEF CH X  
command, where X is the channel number (1 or 2).  
10. If you are using an SNMP management application:  
Use the DEF AGENT command to configure the SNMP agent  
parameters.  
Use the DEF DL command to configure the in-band management  
parameters.  
11. If you are using the terminal to control a single HCD-E1 unit, do not  
change the node number 0 assigned to the unit. For multidrop  
operation, you can assign each HCD-E1 unit a node number between 1  
and 255. Use the DEF NODE command to assign a node number.  
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Configuring HCD-E1  
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12. You can assign each HCD-E1 unit a logical name of up to eight  
characters. The logical name helps identify the source of alarm  
messages that HCD-E1 sends to the supervision terminal. Use the DEF  
NAME command to assign a logical name.  
13. To reset HCD-E1, use the RESET command.  
14. To reset a configuration of HCD-E1 to default values, use the INIT DB  
command.  
The RESET and the INIT DB commands cause HCD-E1 to reinitialize,  
Note  
Tips  
disrupting traffic through HCD-E1 until it resumes normal operation.  
Change of the framing mode causes double temporary synchronization  
loss.  
Use the HELP command to display the correct syntax of commands.  
It is usually sufficient to configure the central unit only, in which case the  
central unit’s configuration parameters are automatically downloaded to  
the remote unit.  
11/07/00 13:21  
Configuring HCD-E1  
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6
Configuring HCD-E1  
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Contents  
CHAPTER 1 INTRODUCTION  
1.1 Overview....................................................................................................................... 1-1  
General ................................................................................................................................1-1  
Versions................................................................................................................................1-1  
Applications..........................................................................................................................1-2  
Features................................................................................................................................1-2  
1.2 Physical Description....................................................................................................... 1-5  
Front Panel...........................................................................................................................1-6  
Rear Panel............................................................................................................................1-6  
1.3 Functional Description................................................................................................... 1-6  
Data Channel Characteristics.................................................................................................1-6  
E1 Link Interface Characteristics ............................................................................................1-7  
HDSL Subsystem Characteristics ...........................................................................................1-7  
Management ........................................................................................................................1-8  
System Timing ....................................................................................................................1-13  
Main Principles of Operation ..............................................................................................1-17  
1.4 Technical Specifications ............................................................................................... 1-25  
HDSL Interface...................................................................................................................1-25  
E1 Sublink Interface ............................................................................................................1-25  
Data Channel Interface .......................................................................................................1-26  
Statistics (Performance Monitoring)......................................................................................1-26  
Front Panel Controls ...........................................................................................................1-26  
Indicators............................................................................................................................1-26  
Diagnostics .........................................................................................................................1-27  
Timing................................................................................................................................1-27  
Supervisory Port..................................................................................................................1-28  
Alarm Relay........................................................................................................................1-28  
Physical ..............................................................................................................................1-28  
Power.................................................................................................................................1-29  
Environment.......................................................................................................................1-29  
CHAPTER 2 INSTALLATION AND SETUP  
2.1 Site Requirements and Prerequisites .............................................................................. 2-1  
2.2 Package Contents........................................................................................................... 2-2  
2.3 Installation and Setup..................................................................................................... 2-2  
Setting the Internal Jumpers and Switches..............................................................................2-2  
Connecting the Interfaces....................................................................................................2-10  
Connecting the Power.........................................................................................................2-12  
CHAPTER 3 FRONT PANEL OPERATING INSTRUCTIONS  
3.1 General.......................................................................................................................... 3-1  
3.2 Front Panel Controls, Connectors, and Indicators........................................................... 3-1  
3.3 Control of HCD-E1 Operation........................................................................................ 3-3  
General ................................................................................................................................3-3  
Organization of the LCD.......................................................................................................3-3  
Information Displayed on the LCD........................................................................................3-5  
Using Front-Panel Push Buttons.............................................................................................3-6  
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3.4 Configuration Parameters............................................................................................... 3-7  
3.5 Operating Instructions.................................................................................................. 3-19  
Turning HCD-E1 On...........................................................................................................3-19  
Checking the Current Operating Configuration....................................................................3-20  
Normal Indications .............................................................................................................3-21  
Monitoring the HCD-E1 Performance..................................................................................3-22  
Turning HCD-E1 Off...........................................................................................................3-22  
3.6 Local Configuration Setup Procedure ........................................................................... 3-22  
General ..............................................................................................................................3-22  
Password Protection............................................................................................................3-23  
General Configuration Procedure........................................................................................3-23  
Working with Time Slots .....................................................................................................3-25  
CHAPTER 4 CONTROL FROM THE SUPERVISORY PORT  
4.1 General.......................................................................................................................... 4-1  
4.2 Hardware Requirements ................................................................................................ 4-2  
Terminal Characteristics ........................................................................................................4-2  
Telnet (IP) Host Characteristics..............................................................................................4-2  
Control Port Interface Characteristics.....................................................................................4-2  
Control Port Handshaking Protocol........................................................................................4-3  
AUTOBAUD Function ..........................................................................................................4-5  
4.3 Starting a Supervision Terminal Management Session..................................................... 4-5  
Control Terminal Configuration.............................................................................................4-5  
Preliminary Settings for Initial Configuration Session ..............................................................4-5  
Initial Configuration ..............................................................................................................4-6  
Working with Time Slots .......................................................................................................4-6  
4.4 HCD-E1 Control Language............................................................................................. 4-7  
General Guidelines and Principles.........................................................................................4-7  
Command Options ...............................................................................................................4-9  
Index of Commands..............................................................................................................4-9  
4.5 HCD-E1 Command Set Description............................................................................. 4-13  
CLR ALM............................................................................................................................4-13  
CLR ALM REM....................................................................................................................4-14  
CLR ALM HRPT..................................................................................................................4-14  
CLR LOOP .........................................................................................................................4-15  
CLR TST .............................................................................................................................4-16  
DATE..................................................................................................................................4-16  
DEF AGENT........................................................................................................................4-17  
DEF BERT...........................................................................................................................4-18  
DEF CH..............................................................................................................................4-19  
DEF DL ..............................................................................................................................4-22  
DEF NAME .........................................................................................................................4-23  
DEF NODE.........................................................................................................................4-23  
DEF PB...............................................................................................................................4-24  
DEF PWD...........................................................................................................................4-24  
DEF SL ...............................................................................................................................4-25  
DEF SP ...............................................................................................................................4-26  
DEF SYS..............................................................................................................................4-28  
DEF TERM..........................................................................................................................4-28  
DSP ALM............................................................................................................................4-29  
DSP ALM HRPT..................................................................................................................4-30  
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Table of Contents  
DSP ALM REM....................................................................................................................4-31  
DSP BERT CH.....................................................................................................................4-31  
DSP HDR TST ....................................................................................................................4-33  
DSP HDSL PM....................................................................................................................4-34  
DSP PB...............................................................................................................................4-35  
DSP R HDR TST .................................................................................................................4-36  
DSP R HDSL PM ................................................................................................................4-36  
DSP R SL PM......................................................................................................................4-37  
DSP REM AGENT ...............................................................................................................4-38  
DSP SL PM.........................................................................................................................4-39  
DSP ST CH.........................................................................................................................4-40  
DSP ST LINE.......................................................................................................................4-42  
DSP ST SL ..........................................................................................................................4-43  
DSP ST SYS.........................................................................................................................4-44  
DSP TS...............................................................................................................................4-46  
EXIT....................................................................................................................................4-47  
F.........................................................................................................................................4-47  
H or HELP..........................................................................................................................4-48  
INIT DB..............................................................................................................................4-49  
INIT F.................................................................................................................................4-50  
LOOP.................................................................................................................................4-50  
RESET.................................................................................................................................4-51  
TIME ..................................................................................................................................4-52  
4.6 Supervision Terminal Operating Instructions ................................................................ 4-52  
Starting a Session - Single HCD-E1 ......................................................................................4-52  
Starting a Session - Multiple HCD-E1...................................................................................4-53  
Control Session...................................................................................................................4-54  
Ending a Control Session.....................................................................................................4-55  
CHAPTER 5 TROUBLESHOOTING AND DIAGNOSTICS  
5.1 General.......................................................................................................................... 5-1  
5.2 Status Indications and Alarms......................................................................................... 5-1  
Front-Panel LEDs ..................................................................................................................5-1  
Alarms..................................................................................................................................5-1  
H-RPT Alarms.......................................................................................................................5-2  
Alarm Relay..........................................................................................................................5-2  
Working with Alarm Buffer..................................................................................................5-12  
5.3 Performance Diagnostics Data...................................................................................... 5-13  
General ..............................................................................................................................5-13  
E1 Sublink Performance Monitoring ....................................................................................5-13  
Summary of E1 Performance Monitoring .............................................................................5-16  
HDSL Performance Monitoring ...........................................................................................5-17  
Summary of HDSL Performance Monitoring........................................................................5-18  
Displaying the Performance Data on the Front-Panel LCD ...................................................5-19  
Displaying the Performance Data on a Control Terminal......................................................5-20  
5.4 Diagnostic Tests ........................................................................................................... 5-21  
Diagnostic Loopbacks .........................................................................................................5-21  
Operating Loopbacks from the Front Panel..........................................................................5-27  
Operating BERT from the Front Panel..................................................................................5-29  
Operating Loopbacks from a Control Terminal ....................................................................5-31  
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Table of Contents  
5.5 Configuration Error Messages ....................................................................................... 5-31  
5.6 Power-Up Self-Test ...................................................................................................... 5-34  
5.7 Troubleshooting ........................................................................................................... 5-34  
APPENDIX A SNMP MANAGEMENT  
APPENDIX B CONNECTOR WIRING  
APPENDIX C IR-ETH INTERFACE MODULE  
APPENDIX D IR-ETH/Q INTERFACE MODULE  
APPENDIX E IR-IP INTERFACE MODULE  
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Table of Contents  
List of Figures  
Figure 1-1 Typical HCD-E1 Application ........................................................................................ 1-2  
Figure 1-2 HCD-E1 3D View ........................................................................................................ 1-6  
Figure 1-3 Basic Management Topology Using Network Management Station ............................ 1-10  
Figure 1-4 Extended Management Topology Using Network Management Station...................... 1-11  
Figure 1-5 Flow of Timing Signals through HCD-E1 System in the External Timing Mode............ 1-13  
Figure 1-6 Flow of Timing Signals through HCD-E1 System in the Internal Timing Mode ............ 1-14  
Figure 1-7 Data Channel Timing, Flow of Timing Signals in a Typical Application ....................... 1-15  
Figure 1-8 Sublink Timing, Flow of Timing Signals in a Typical Application ................................. 1-17  
Figure 1-9 E1 (CEPT) Frame Format............................................................................................ 1-18  
Figure 1-10 2B1Q Encoding Rule ............................................................................................... 1-21  
Figure 1-11 Mapping of Core Frame into HDSL Frames.............................................................. 1-23  
Figure 2-1 HCD-E1 - Identification of Boards, Jumpers and Switches............................................ 2-3  
Figure 2-2 Identification of Cover Screws...................................................................................... 2-5  
Figure 2-3 Removal of Sublink Interface Board ............................................................................. 2-7  
Figure 2-4 E1 Sublink Interface Board, Internal Settings ................................................................ 2-8  
Figure 2-5 HCD-E1 Rear Panel (AC Powered Unit)..................................................................... 2-10  
Figure 3-1 HCD-E1 Front Panel .................................................................................................... 3-2  
Figure 3-2 HCD-E1 LCD Basic Menu Structure............................................................................. 3-4  
Figure 5-1 LP LINE Loopback ..................................................................................................... 5-22  
Figure 5-2 H-RPT Local Loopback ............................................................................................... 5-22  
Figure 5-3 LP L SL Loopback ...................................................................................................... 5-23  
Figure 5-4 LP R SL Loopback...................................................................................................... 5-23  
Figure 5-5 LOOP R R SL Loopback............................................................................................. 5-24  
Figure 5-6 LP L CH 1 Loopback.................................................................................................. 5-25  
Figure 5-7 LP R CH 1 Loopback ................................................................................................. 5-25  
Figure 5-8 LP R R CH 1 Loopback .............................................................................................. 5-26  
Figure 5-9 LP INBAND CH 1 Loopback...................................................................................... 5-26  
Figure 5-10 LP R R CH 1 Loopback + LP BERT CH 1................................................................. 5-27  
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Table of Contents  
List of Tables  
Table 1-1 Automatically-Selected FIFO Size Values .................................................................... 1-16  
Table 2-1 HCD-E1 Interface Adapter Cables............................................................................... 2-11  
Table 3-1 HCD-E1 Controls, Connectors and Indicators ............................................................... 3-2  
Table 3-2 System Parameters........................................................................................................ 3-8  
Table 3-3 Sublink Configuration Parameters ............................................................................... 3-10  
Table 3-4 Control Port Parameters.............................................................................................. 3-12  
Table 3-5 Channel Parameters.................................................................................................... 3-14  
Table 3-6 BERT Parameters ........................................................................................................ 3-17  
Table 3-7 Download Parameters ................................................................................................ 3-18  
Table 3-8 Priority Bumping Configuration Parameters................................................................. 3-18  
Table 4-1 HCD-E1 Command Set Index....................................................................................... 4-9  
Table 4-2 HCD-E1 Default Configuration ................................................................................... 4-49  
Table 5-1 HCD-E1 Alarm Buffer Messages.................................................................................... 5-3  
Table 5-2 H-RPT Alarm Buffer Messages..................................................................................... 5-10  
Table 5-3 Summary of E1 Performance Monitoring..................................................................... 5-16  
Table 5-4 Summary of HDSL Performance Monitoring from the Front Panel............................... 5-18  
Table 5-5 Configuration Error Messages...................................................................................... 5-31  
Table 5-6 Troubleshooting Chart ................................................................................................ 5-34  
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Chapter 1  
Introduction  
1.1 Overview  
HCD-E1 is a standalone HDSL NTU (Network Terminal Unit) / LTU (Line  
Terminal Unit) that provides the user with one E1 sublink drop & insert  
port and two n × 64 kbps or n × 56 kbps data channels. Fractional E1 from  
the E1 sublink, as well as data from the n × 64 kbps / n × 56 kbps channels  
are multiplexed over E1 frames and transferred by the HDSL modem to the  
remote location. For direct connection to DACS, RAD’s HCD-E1 unit can  
be used in the central office, eliminating the need to convert back to  
n × 64 kbps.  
General  
HCD-E1 supports the transmission of two synchronous data channels and  
one E1 sublink, over the HDSL link. The sublink enables the connection of  
fractional E1 equipment (digital PBXs), thus enabling HCD-E1 to serve as an  
integrating multiplexer for E1 and fractional E1 services.  
The mapping of the user’s data to the main link time slots is user-selectable.  
For the synchronous data ports and E1 sublink, three mapping methods are  
available: bundling into consecutive or alternate time slots, or placing in  
individually selected time slots. A sublink time slot is always routed to the  
main link time slot with the same number.  
In addition, HCD-E1 can also be operated in an unframed mode: in this  
mode HCD-E1 accepts a 2048 kbps data stream through the E1 sublink or  
data channel and converts it to an unframed G.703 signal for transport over  
the HDSL link. Thus, HCD-E1 can also serve as an interface converter and  
high-speed, short-distance modem.  
HCD-E1 can work with an HDSL repeater (H-RPT) on the main link.  
HCD-E1 can check the H-RPT alarm messages and connect/disconnect the  
local loopback on H-RPT (LOOP L HRPT).  
HCD-E1 can be ordered in several versions, which differ in the number  
and type of user ports:  
Versions  
One or two synchronous data channels. The data channels can be  
ordered with RS-530, V.35, V.36/RS-449, or X.21 interfaces.  
One synchronous data channel (with RS-530, V.35, V.36/RS-449, or X.21  
interface) and one Ethernet interface module (IR-ETH, IR-ETH/Q, or  
IR-IP).  
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When you order a unit with a V.35, V.36/RS-449, or X.21 interface, you  
receive a unit with the RS-530 interface provided with a corresponding  
adapter cable.  
HCD-E1 is available in the AC and DC versions.  
The AC version is powered by 100 to 240 VAC, 50 or 60 Hz. As an option,  
HCD-E1 can also be ordered with a -48 VDC power supply.  
In this manual, the generic term HCD-E1 is used when the information is  
applicable to all HCD-E1 versions. Information applicable to a specific version  
is explicitly identified.  
Note  
Figure 1-1 shows a typical application for HCD-E1. In this application,  
HCD-E1 is used to connect the synchronous data channels over an HDSL  
line, while the sublink is used to connect to a digital PABX trunk.  
Applications  
USER'S  
DTE  
USER'S  
DTE  
DATA CHANNELS  
DATA CHANNELS  
(nx56 kbps or nx64 kbps)  
HCD-E1  
(nx56 kbps or nx64 kbps)  
HCD-E1  
HDSL LINES  
USER'S  
DTE  
USER'S  
DTE  
E1 SUB LINK  
E1 SUB LINK  
PABX  
PABX  
Figure 1-1 Typical HCD-E1 Application  
Statistics Collection  
Features  
HCD-E1 offers extensive performance statistics collection capabilities:  
E1 performance statistics. When operating with the CRC-4 option  
enabled, HCD-E1 stores E1 line statistics in compliance with the  
requirements of ITU-T Rec. G.706. The user can display the statistics  
collected for the line connected to the E1 sublink of the local unit, as well  
as for the link connected to the E1 sublink of the remote unit.  
HDSL performance statistics. HCD-E1 stores performance statistics for  
each of the two HDSL lines in compliance with the requirements of  
ITU-T Rec. G.826.  
Test and Diagnostics Capabilities  
HCD-E1 has comprehensive diagnostics capabilities, which include the  
following loopbacks:  
Local loopbacks on the data channel and E1 sublink of the local HCD-E1  
Local loopback on the HDSL lines  
1-2  
Overview  
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Remote loopbacks on the data channel and E1 sublink of the local  
HCD-E1  
Remote loopbacks on the data channel and E1 sublink of the remote  
unit.  
Inband-activated remote loopback on the data channel of remote  
HCD-E1  
H-RPT local loop (towards the HCD-E1 configured as central) when  
working with the HDSL repeater.  
In order to enable testing of marginal links, HCD-E1 also offers Bit Error Rate  
(BER) testing on the synchronous data channels, using locally generated,  
pseudo-random sequence. To provide compatibility with other BER testing  
equipment, the user can select the pseudo-random pattern that best  
matches his need.  
Maintenance is further enhanced by advanced power-up self-test  
capabilities, and by an automatically performed cyclic self-test that provides  
circuit-level diagnostics data. The user can also read the diagnostic data of  
the remote unit through the HDSL link.  
HCD-E1 can identify the type of the unit at the remote end of the HDSL  
link and provides the user with a possibility to read the diagnostic data of  
the remote unit through the HDSL link.  
LEDs and Alarms  
HCD-E1 responds to any alarm detected during its operation by an alarm  
message and stores it in a buffer that can hold up to 100 messages. A front  
panel LED indicator lights when the alarm buffer contains alarm messages. The  
local operator can then review the contents of the alarm buffer on the front  
panel display, or from an ASCII terminal connected to the supervisory port.  
HCD-E1 can provide an alarm indication by means of an alarm relay (dry  
contacts), which enables remote signaling of alarm conditions when HCD-E1  
is located far from the personnel in charge for its proper operation.  
In addition to the alarm buffer, front-panel LED indicators display in real  
time the status of the E1 sublink and the HDSL lines, and alert when test  
loops are present in the system. The status of the LAN in the case of the  
Ethernet version is indicated by the Ethernet module LEDs located on the  
HCD-E1 rear panel.  
Time Slot Handling  
When operating in any of the framed modes, HCD-E1 allows the user to  
configure the routing of the individual time slots for each of the data  
channels, and for the sublink. The routing can be modified during system  
operation, without disrupting the service to users of time slots that are not  
rerouted. HCD-E1 automatically connects the time slots in both the receive  
and transmit directions.  
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To expedite the routing, HCD-E1 supports two “bundle” routing modes,  
called “sequential bundle” and “alternate bundle” modes. In the sequential  
mode, one “bundle” (group of consecutive time slots, identified by the  
number of the starting time slot and the total number of time slots) can be  
routed to the corresponding main link time slots, where they are inserted in  
the main link frame sequentially, in consecutive time slots (1, 2, 3, 4, 5, etc).  
In the alternate mode, the time slots are inserted in the following way: 1, 3,  
5, 7, etc.  
For data channels and the sublink, the user can either individually select the  
main link time slots in which the user's data is to be inserted, or can use one  
of the “bundle” routing modes. Time slots assigned to data channels are  
always defined as data time slots. A sublink time slot is always routed to the  
main link time slot with the same number.  
Priority Bumping  
HCD-E1 will continue working (at a half of its baud rate) even if one of its  
HDSL lines is down. The priority bumping feature allows the user to select  
the timeslot priority (high or low) in this case. The time slots which have  
been assigned high priority will continue being sent on the remaining HDSL  
line.  
Unframed Mode  
HCD-E1 can also be operated in an unframed mode: in this mode HCD-E1  
accepts a 2048 kbps data stream through the E1 sublink or data channel and  
converts it to an unframed G.703 signal for transport over the HDSL link.  
Thus, HCD-E1 can also serve as an interface converter and high-speed,  
short-distance modem.  
When the unframed mode is selected in the E1 sublink, HCD-E1  
transparently transfers the data stream received from the E1 port to the main  
link. The E1 sublink or data channel must be configured for operation in  
unframed mode at a data rate of 2048 kHz, and the other data ports must  
be disconnected from the main link.  
1.2 Physical Description  
HCD-E1 is a compact unit, intended for installation on desktops or shelves.  
The unit height is 1U (1.75").  
An optional rack-mount adapter kit enables the installation of one or two  
HCD-E1 units in a 19" rack.  
Figure 1-2 shows the 3D view of HCD-E1.  
1-4  
Physical Description  
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Figure 1-2 HCD-E1 3D View  
The front panel provides control over the unit operation. The LEDs provide  
real-time indications related to the operation and status of the unit.  
Front Panel  
Rear Panel  
The LCD together with three push-button switches are used to display  
status (alarm) messages, diagnostics and performance monitoring data, test  
status and configuration parameters of HCD-E1. You can also use the LCD  
and push buttons to configure the unit. For details, see Chapter 3,  
Operation and Chapter 5, Troubleshooting and Diagnostics.  
The rear panel of the unit allows access to interface and power  
connections. For details, see Chapter 2, Installation. For versions with the  
Ethernet data channel, the rear panel contains Ethernet module LEDs  
providing real-time indications related to the operation and status of the  
LAN.  
1.3 Functional Description  
HCD-E1 data ports support user-selectable transmission rates. The supported  
data rates are integer multiples of 56 kbps or 64 kbps (n × 56 kbps or  
n × 64 kbps, where n is in the range of 1 to 32, corresponding to rates in the  
range of 56 kbps to 1792 kbps, or 64 kbps to 2048 kbps respectively).  
Data Channel  
Characteristics  
HCD-E1 supports the following types of data port interfaces: RS-530, V.35,  
X.21, V.36/R-449/422 and IR-ETH (10BaseT or 10Base2), IR-ETH/Q  
(10BaseT) or IR-IP (10BaseT).  
HCD-E1 has two data ports, each terminated in a 25-pin D-type female  
connector. The units with an Ethernet interface arrive with the Ethernet  
interface module built in the upper port.  
When using the RS-530 interface, equipment with RS-530 interface can be  
directly connected to the data channel connector using standard cables.  
Equipment with V.36/RS-422/RS-449, X.21 and V.35 interfaces can be  
connected by means of adapter cables, supplied with the unit.  
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Each HCD-E1 data port supports the following control lines:  
RTS - input from the locally connected data equipment  
CTS - the user can permanently set the CTS line in the active state, or  
can make the CTS line follow the RTS line.  
DSR - the DSR line is always active when the HCD-E1 is powered,  
except when a remote main link test loopback is activated.  
DCD - the DCD line is active when the HCD-E1 main link interface is  
synchronized.  
The HCD-E1 sublink (E1) interface meets the requirements of ITU G.703,  
G.704, G.706, and G.732. HCD-E1 supports framed and unframed E1 data  
streams. For framed data streams, HCD-E1 also supports the CRC-4 option  
specified in ITU G.704. CRC-4 use is user-selectable.  
E1 Link Interface  
Characteristics  
The E1 port has two line interfaces: a 120-balanced line interface  
terminated in an RJ-45 eight-pin female connector, and a 75-unbalanced  
interface terminated in two BNC female coaxial connectors. Line coding is  
HDB3. The nominal balanced interface transmit level is 3V, and the  
unbalanced interface transmit level is 2.37V. The maximum allowed line  
attenuation is up to 10 dB.  
To increase the E1 sublink range, it can be ordered with an integral LTU. In  
this case, the maximum line attenuation is 36 dB, enabling range of up to  
2 km, using typical cables.  
Jitter performance complies with the requirements of ITU G.823.  
The HCD-E1 HDSL subsystem uses dual duplex transmission over two  
2-wire lines. The line code on the HDSL lines is 2B1Q at a rate of  
584 kbaud (equivalent to a data transfer rate of 1168 kbps).  
HDSL Subsystem  
Characteristics  
Using advanced equalization, adaptive filtering, and echo cancellation  
techniques, HCD-E1 compensates for line impairments, bridged taps, and  
mixed cables commonly encountered in the local distribution network.  
Moreover, due to its high immunity to background noise, HCD-E1 enables  
the transmission of multiple HDSL signals in the same physical cable without  
requiring pair selection.  
HCD-E1 can operate on unloaded AWG-22, AWG-24, and AWG-26  
twisted-wire pairs, and other similar pairs. Up to two bridged taps, having a  
length of up to 500m, are tolerated. HCD-E1 achieves typical ranges of  
4.8 km (3.0 miles) on AWG-24 (0.5 mm) pairs, and up to 3.8 km (2.4 miles)  
on AWG-26 (0.4 mm) pairs. When working with the HDSL repeater  
(H-RPT), typical ranges are up to 9.2 km (5.7 miles) from central to remote  
unit on AWG-24 (0.5 mm) pairs, and up to 7.2 km (4.5 miles) from central  
to remote unit on AWG-26 (0.4 mm) pairs. The HDSL line interfaces are  
terminated in an RJ-45 eight-pin female connector.  
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Functional Description  
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The transmission of data on each twisted-wire pair (HDSL line) is full duplex,  
and except for the distribution of payload data bits between the two lines,  
each HDSL line operates independently.  
HCD-E1 provides an embedded operations channel (eoc) within the HDSL  
data streams, which enables end-to-end system management and  
supervision.  
The HDSL subsystem operates in a master-slave mode.  
The master unit, called line termination unit (LTU), determines the  
distribution of payload data between the HDSL lines, controls the system  
start-up procedure, provides the timing reference for HDSL line  
transmission, and manages the communication on the eoc channel.  
The slave unit, located at the remote end of the link, is called network  
termination unit (NTU).  
HCD-E1 supports both the central (LTU) and the remote (NTU) operating  
modes; the actual operating mode (LTU or NTU) is user-selectable.  
If you have a phantom-fed H-RPT on the HDSL link, your HCD-E1 must be  
used as NTU only.  
Note  
Local Control  
Management  
HCD-E1 is designed for unattended operation. HCD-E1 configuration, that  
is, the complete collection of its operating parameters, is determined by a  
database stored in non-volatile memory. The database parameters and the  
operation of HCD-E1 can be controlled by means of a simple menu,  
operated by push buttons located on the front panel. During setup, the  
LCD display guides the operator in the execution of the desired operations.  
The display provides information concerning the current system  
configuration and operating mode, and the available values of each  
programmable parameter. In case of operator errors, HCD-E1 displays the  
configuration error number, which helps the operator take the correct  
action.  
Remote Management  
In addition to front panel control, HCD-E1 supports management from a  
remote location. The remote management capabilities can be used to  
configure the HCD-E1 parameters and display status (alarm) messages,  
diagnostics information, performance monitoring data, and the test status.  
These functions are performed through a serial RS-232 port that enables  
serial communication with a supervision terminal.  
Using the supervision terminal functions, the user can also enable remote  
management using IP communications, i.e., Telnet and SNMP. The IP  
communication uses the Serial Link Internet Protocol (SLIP).  
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The remote management capabilities available through the serial RS-232  
port are as follows:  
Management by means of a Supervision Terminal  
Management by means of Telnet  
SNMP Management.  
If you have an H-RPT on your link, you can use either SP or Telnet  
management to display the status messages of H-RPT and, if your  
application allows this, connect/disconnect the H-RPT loop (from the unit  
configured as central). For the description of the H-RPT loop and how to  
operate it, refer to Section 5.4, Diagnostic Tests in Chapter 5.  
Management by means of a Supervision Terminal. Any “dumb” ASCII  
terminal connected to the CONTROL DCE port of HCD-E1 (or a PC running  
a terminal emulation program), controlled by the program stored in HCD-  
E1, can be used as a supervision terminal.  
The supervision terminal can communicate with HCD-E1 using either  
point-to-point or polled (multidrop) communication. For polling purposes,  
each HCD-E1 can be assigned an eight-bit address, for a maximum of  
255 nodes (the zero address is reserved).  
As an option, you can connect a dial-up modem to the control port, to  
provide call-in capabilities.  
In addition to the remote management functions listed above, the  
supervision terminal is also used for the preliminary configuration of  
HCD-E1, to enable the use of IP communication for Telnet and SNMP  
management.  
Management by means of Telnet. HCD-E1 also supports the Telnet  
protocol, which enables remote management using the same command line  
interface available with a supervision terminal. Telnet uses TCP/IP  
communication through the RS-232 port of HCD-E1.  
SNMP Management. The SNMP management capability enables fully  
graphical, user-friendly management using the RADview network  
management stations offered by RAD, as well as management by other  
SNMP-based management systems.  
Inband and Out-of-Band Management  
HCD-E1 includes a proprietary IP router for in-band management traffic.  
This function enables HCD-E1 to transfer in-band IP and SNMP  
management messages generated by or addressed to other HCD-E1 units,  
and also transfer in-band management traffic addressed to other RAD  
equipment that operates over E1 links, such as MEGAPLEX-2100,  
DXC-30/DXC-10A/DXC-8R, etc.  
1-8  
Functional Description  
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A basic management topology, which is suitable for both SNMP and Telnet  
management, is shown in Figure 1-3. In this example, a network  
management station is attached to an Ethernet LAN. A remote access LAN  
extender, MBE/RAS/A, is located near the managed equipment (such as  
HCD-E1, MEGAPLEX-2100(*), etc.), and its serial ports are connected via  
cables to the CONTROL connectors of the equipment.  
LAN  
To CONTROL  
Connection of  
Managed  
Equipment  
. . . .  
Serial Ports  
Network  
Management  
Station  
MBE/RAS/A  
Figure 1-3 Basic Management Topology Using Network Management Station  
HCD-E1 also includes an SNMP agent that enables SNMP management of  
the HCD-E1, using the UDP-over-IP protocol. The SNMP agent can  
communicate out-of-band and/or in-band, where each communication  
mode can be separately enabled:  
Out-of-band communication is performed via the serial ports of HCD-E1,  
using the Serial Link Internet Protocol (SLIP). When using out-of-band  
communication, it is necessary to disable the Autobaud function, and select  
a specific data rate for the port data rate (9600 bps is recommended).  
In-band communication is performed over HDSL lines (i.e., over the main  
link), and when applicable, over the sublink as well. This communication  
mode uses a proprietary protocol. The user can configure the system to  
transfer the in-band management traffic either by means of the E1 time slot  
0 (sublink), or in a dedicated user-selected time slot (main link or sublink).  
Using in-band management, a user of an SNMP management station  
connected to one HCD-E1 can also control the HCD-E1 unit located to the  
remote end of the main link, or the sublink.  
The in-band management data rate depends on the selected routing  
method:  
When using the TS 0 of the sublink, the data rate is 4 kbps.  
When using a dedicated main link slot, the data rate is 64 kbps.  
When using a dedicated sublink slot, the data rate is 8 kbps.  
The HCD-E1 SNMP agent must be enabled by the user, so that it will accept  
the management messages transmitted by the network management station.  
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Each SNMP agent recognizes the messages addressed to its own IP address.  
In addition, the SNMP agent includes a proprietary built-in IP router, which  
is able to route management messages in accordance with the network  
topology determined by the routing algorithm, without requiring the user to  
provide a priori topology information on the network. The user can read the  
information collected by the IP router on the additional remote SNMP  
agents which are served by the router.  
The proprietary IP router operates only on the in-band traffic.  
The advanced capabilities of the HCD-E1 SNMP agents allow easy  
integration of the HCD-E1 in wide-area managed communication systems.  
Its capabilities support any practical communication network topology, as  
illustrated in the example shown in Figure 1-4.  
Figure 1-4 Extended Management Topology Using Network Management Station  
The network shown in Figure 1-4 can be managed by a single network  
management station, because of the flexible routing capabilities of the  
SNMP agent can carry the management traffic over many different paths.  
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For example, the following paths can be made available for the management  
traffic, when the management station is attached to HCD-E1:  
The network is connected to the network management station using a  
single serial communication link, attached to the CONTROL DCE port of  
HCD-E1 (system 1).  
In-band communication through the HCD-E1 No. 1 main and sub links is  
used to manage the remote units connected to the remote ends of the  
corresponding links:  
HCD-E1 No. 2 is managed via the main link of HCD-E1 No. 1.  
The sublink of HCD-E1 No. 1 is connected via the E1 transmission plant  
to a remote communication node, which is used to perform rerouting.  
The rerouting is based on a digital cross-connect system and E1/T1  
converter, DXC-30, also offered by RAD. The DXC-30 can be  
configured to support the RAD proprietary in-band management  
protocol using time slot 0.  
The DXC-30 transfers the management traffic to several of its ports.  
These ports are connected to other systems, e.g., HCD-E1 No. 3,  
MEGAPLEX-2100(*) No. 4, etc. Each remote system can relay the  
management traffic to other equipment.  
Thus an entire wide-area network can be managed by means of a network  
management station connected to any HCD-E1 unit (or to any of the other  
RAD equipment which supports SNMP management).  
Control of Remote Unit from Central Unit  
As described above, the operation of the HCD-E1 system is basically  
asymmetrical, i.e., the HDSL subsystem inherently operates in a  
central (master)/remote (slave) mode. HCD-E1 takes advantage of this  
characteristic to expedite the configuration, management and supervision  
tasks related to the remote unit.  
All the parameters that determine the end-to-end system performance can  
be configured on the central unit only. They are automatically transferred  
(downloaded) from HCD-E1 configured as central to the unit configured as  
remote, using the eoc channel. The user of the local unit configured as  
central can also initiate tests on the unit configured as remote.  
Using the remote management, the user of the local unit can read and clear  
through the eoc channel the alarm messages and performance parameters of  
the unit at the remote site.  
Thus, HCD-E1 configured as central unit serves as a full-function proxy agent  
for the remote unit with respect to all the management methods (LCD,  
supervision terminal, Telnet, and SNMP). When using in-band management,  
each unit is managed separately and operates as an agent in its own right.  
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HCD-E1 offers selectable timing options, which enable the distribution of  
timing over the HDSL system, from the central office to the remote end. The  
use of stuffing on the HDSL subsystem ensures that the E1 signal and the  
data rate provided to the customer equipment by the remote unit are  
locked to the timing of the E1 signal and data rate received by the central  
unit.  
System Timing  
HCD-E1 Configured as Central Unit (LTU)  
The HCD-E1 unit configured as LTU has two timing modes: external timing  
and internal timing.  
With external timing, the HCD-E1 system timing is locked to the clock  
signals recovered from the incoming clock or to external clock signals  
(derived from one of the synchronous data channels or from the E1 sublink).  
Figure 1-5 shows the flow of timing signals through the HCD-E1 system in  
the external timing mode.  
REMOTE HCD-E1  
CENTRAL HCD-E1  
HDSL  
LINE A  
HDSL LINE  
INTERFACE  
HDSL LINE A  
INTERFACE  
LOOPBACK  
TIMING  
TIMING  
SOURCE  
HDSL  
LINE B  
CUSTOMER  
SIDE (DTE)  
E1  
NETWORK  
SIDE  
E1  
INTERFACE  
INTERFACE  
HDSL LINE B  
INTERFACE  
HDSL LINE B  
INTERFACE  
OR  
DATA  
CHANNEL 1  
INTERFACE  
DATA  
CHANNEL 1  
INTERFACE  
DATA  
EQUIPMENT  
DATA  
EQUIPMENT  
OR  
DATA  
CHANNEL 2  
INTERFACE  
DATA  
CHANNEL 2  
INTERFACE  
DATA  
EQUIPMENT  
DATA  
EQUIPMENT  
Figure 1-5 Flow of Timing Signals through HCD-E1 System in the External Timing Mode  
With internal timing, the HCD-E1 system timing is determined by the clock  
signal generated by an internal crystal oscillator. Figure 1-6 shows the flow of  
timing signals through the HCD-E1 system in the internal timing mode.  
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REMOTE HCD-E1  
HDSL  
LINE A  
INTERNAL  
TIMING  
HDSL LINE  
INTERFACE  
HDSL LINE A  
INTERFACE  
LOOPBACK  
TIMING  
LOOPBACK  
TIMING  
HDSL  
LINE B  
CUSTOMER  
SIDE (DTE)  
E1  
NETWORK  
SIDE  
E1  
INTERFACE  
INTERFACE  
HDSL LINE B  
INTERFACE  
HDSL LINE B  
INTERFACE  
DATA  
CHANNEL 1  
INTERFACE  
DATA  
CHANNEL 1  
INTERFACE  
DATA  
EQUIPMENT  
DATA  
EQUIPMENT  
DATA  
CHANNEL 2  
INTERFACE  
DATA  
CHANNEL 2  
INTERFACE  
DATA  
EQUIPMENT  
DATA  
EQUIPMENT  
CENTRAL HCD-E1  
Figure 1-6 Flow of Timing Signals through HCD-E1 System in the Internal Timing Mode  
HCD-E1 Configured as Remote Unit (NTU)  
The HCD-E1 unit configured as NTU always locks its internal system timing  
to the incoming HDSL signals, that is, to the timing of the unit configured as  
central. The timing is derived from the clock signal recovered from line A; if  
line A fails, HCD-E1 automatically switches to the clock signal recovered  
from line B.  
Data Channel Timing  
The HCD-E1 data ports have three timing modes: DCE, DTE1 and DTE2.  
In the DCE timing mode, the HCD-E1 data channel provides transmit  
and receive clocks for the equipment connected to the data port.  
In the DTE1 timing mode, the HCD-E1 data channel sends the receive  
data accompanied by the receive clock, derived from the main system  
clock, to the data equipment connected to the data port, and accepts  
data according to the data equipment transmit clock.  
In the DTE2 timing mode, the HCD-E1 data channel transmits and  
receives data according to the clock signals provided by the equipment  
connected to the data port. When using this clocking mode, the main  
link timing must be locked to the clock signal supplied by the data port  
interface. The DTE2 mode is not available on channels with X.21  
interface.  
Figure 1-7 shows a typical application which uses one of the data channels,  
operating in the DTE2 timing mode, as the timing reference source, and  
illustrates the flow of timing signals within the system.  
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Figure 1-7 Data Channel Timing, Flow of Timing Signals in a Typical Application  
In the application shown in Figure 1-7, the data equipment located on the  
customer’s premises uses the HCD-E1 link to connect to a data network.  
Since data networks include accurate timing sources and do not accept data  
whose timing deviates significantly from the network timing, it is necessary  
to ensure that the equipment located on the customer's premises uses the  
data network timing.  
For this purpose, the HCD-E1 unit connected to the data network uses  
channel 2 as its timing source, and therefore its main link timing is locked to  
the data network timing.  
The HCD-E1 unit located on the customer’s premises uses main link timing.  
As a result, its system timing is also locked to the data network timing, and  
the network timing is transferred to the data equipment located on the  
customer's premises.  
Note that the other data channel of the two HCD-E1 units must use DCE  
timing (or DTE1 timing, provided the data equipment operates with  
loopback timing). This enables locking the timing of the other equipment to  
the accurate timing source serving the data network.  
Manual Selection of Data Channel FIFO size (DTE2 Mode)  
To optimize jitter performance, the FIFO size of the data channels operating  
in the DTE2 mode can be selected manually ( 16 bits, 30 bits, 52 bits, or  
72 bits). The manually-selected value cannot be less than the  
automatically-selected value. Table 1-1 lists these values for different data  
channel rates.  
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Table 1-1 Automatically-Selected FIFO Size Values  
Data Channel Rate  
FIFO Size  
64 kbps  
16 bits  
30 bits  
52 bits  
72 bits  
52 bits  
30 bits  
16 bits  
128 and 192 kbps  
256 to 448 kbps  
512 to 1536 kbps  
1600 to 1792 kbps  
1856 and 1920 kbps  
1984 and 2048 kbps  
Sublink Timing Application  
Figure 1-8 shows a typical application which uses the sublink as the timing  
reference source, and illustrates the flow of timing signals within the system.  
In the application shown in Figure 1-8, a PABX is connected by a HDSL link  
to a digital exchange, and must therefore use the exchange timing. For this  
purpose, the HCD-E1 unit connected to the exchange uses the clock signal  
recovered from the sublink as the system timing reference, and HCD-E1  
located on the customer’s premises uses main link timing (LBT).  
Therefore, the system timing of HCD-E1 located on the customer's premises  
is locked to the digital exchange timing. The exchange timing is thus  
transferred to the PABX located on the customer's premises.  
Note that the data channels of the two HCD-E1 units must use DCE timing  
(or DTE1 timing, provided the data equipment operates with loopback  
timing). This enables locking the timing of all the other equipment  
connected to the HCD-E1 units to the accurate timing source serving the  
digital exchange.  
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Figure 1-8 Sublink Timing, Flow of Timing Signals in a Typical Application  
This section describes the E1 and the HDSL environments, to provide the  
background information required for the understanding of the configuration  
parameters of the HCD-E1 system.  
Main Principles of  
Operation  
The E1 (CEPT) Environment  
The E1 line interfaces of the HCD-E1 comply with the applicable  
requirements of ITU-T Rec. G.703, G.704, G.706, G.732, and G.823.  
E1 Signal Structure  
The E1 line operates at a nominal rate of 2.048 Mbps, using a line signal  
encoded according to the High-Density Bipolar 3 (HDB3) code. The data  
transferred over the E1 line is organized in frames. Each E1 frame includes  
256 bits. The E1 frame format is shown in Figure 1-9.  
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Time Slot 0  
Time Slot 16  
a. Frame 0  
Time Slots 1-15, 17-31  
a. Even Frames (0,2,4-14)  
8 Bits/  
1
0
0
1
1
0
1
1
0
0
0
0
X Y X X  
Time Slot  
FAS  
MAS  
Channel Data  
b. ODD Frames (1,3,5-15)  
A N N N N N  
b. Frames 1-15  
I
1
A B C D A B C D  
1
2
3
4
5
6
7
8
TS TS TS TS TS TS TS TS TS TS TS TS TS TS TS TS TS TS TS TS TS TS TS TS TS TS TS TS TS TS TS TS  
10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31  
32 Time Slots/Frame  
0
1
2
3
4
5
6
7
8
9
FR  
0
FR  
1
FR  
2
FR  
3
FR  
4
FR  
5
FR  
6
FR  
7
FR  
8
FR  
9
FR  
10  
FR  
11  
FR  
12  
FR  
13  
FR  
14  
FR  
15  
16 Frames/Multiframe  
Notes  
I
N
A
International Bit  
National Bit  
Alarm Indication Signal (Loss of Frame Alignment - Red Alarm)  
ABCD ABCD Signaling Bits  
X
Extra Bit  
Y
MAS  
Loss of Multiframe Alignment  
Multiframe Alignment Signal  
FAS Frame Alignment Signal, Occupies alternate  
(but not necessarily even) frames  
Figure 1-9 E1 (CEPT) Frame Format  
The 256 bits consist of 32 time slots of eight bits each, that carry the data  
payload. The frame repetition rate is 8,000 per second, and therefore the  
data rate supported by each time slot is 64 kbps. The number of time slots  
available for user data is maximum 31, because time slot 0 is always used for  
frame synchronization.  
Time Slot 0  
Time slot 0 is used for two main purposes:  
Delineation of frame boundaries. For this purpose, in every second frame  
time slot 0 carries a fixed pattern, called Frame Alignment Signal (FAS).  
Frames carrying the FAS are defined as even frames, as they are assigned  
number 0, 2, 4, etc. when larger structures (multiframes) are used.  
The receiving equipment searches for this fixed pattern in the data stream  
using a special algorithm, a process called frame synchronization. Once this  
process is successfully completed, the equipment can identify each bit in the  
received frames.  
Transmission of housekeeping information. In every frame without FAS  
(odd frames), time slot 0 carries housekeeping information. This  
information includes:  
Bit 1 - this bit is called the international (I) bit. Its main use is for error  
detection using the optional CRC-4 function.  
Bit 2 - this bit is always set to 1, a fact used by the frame alignment  
algorithm.  
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Bit 3 - this bit is used as a Remote Alarm Indication (RAI), to notify the  
equipment at the other end that the local equipment lost frame  
alignment, or does not receive an input signal.  
The other bits, identified as Sa4 through Sa8, are designated national  
bits, and are actually available to the users, provided agreement is  
reached as to their use. RAD equipment with SNMP agents can use  
the Sa4 bit for in-band management traffic. The total data rate of the  
in-band management traffic when using the Sa4 bit, is 4 kbps.  
Multiframes  
To increase the information carrying capacity without wasting bandwidth,  
the frames are organized in larger patterns, called multiframes. Two types of  
multiframes are generally used:  
G732N, which consists of 2 frames (one odd frame and one even frame).  
The G732N multiframe is generally used when time slot 16 is available to  
the user. In this mode, the maximum number of time slots available for  
payload is 31 (maximum payload data rate of 1984 Kbps). For systems  
which use the Common-Channel Signaling (CCS) method, the CCS  
information is often transmitted in time slot 16.  
G732S, which consists of 16 frames. The G732S multiframe is generally  
used when time slot 16 serves for the transmission of end-to-end  
signaling using Channel-Associated Signaling (CAS). CAS is typically used  
on links that transfer voice channels. In this mode, the maximum number  
of time slots available for payload is 30 (maximum data rate of  
1920 kbps).  
E1 Line Statistics Using CRC-4 Error Detection  
HCD-E1 supports the CRC-4 function in accordance with ITU G.704, which  
allows the evaluation of the quality of transmission over E1 links.  
When the CRC-4 option is enabled, frames are arbitrarily grouped in groups  
of 16 (these groups are called CRC-4 multiframes, and do not bear any  
relationship to the 16-frame multiframe structures used with the G732S  
super-frame explained above). A CRC-4 multiframe always starts with a  
frame that carries the frame alignment signal. The CRC-4 multiframe  
structure is identified by a six-bit CRC-4 multiframe alignment signal,  
which is multiplexed into bit 1 of time slot 0 of each odd-numbered (1, 3, 5,  
etc.) frame of the multiframe (up to frame 11 of the CRC-4 multiframe).  
Each CRC-4 multiframe is divided into two submultiframes of 8 frames  
(2048 bits) each. The detection of errors is achieved by calculating a four-bit  
checksum on each 2048-bit block (submultiframe). The four checksum bits  
calculated on a given submultiframe are multiplexed, bit by bit, in bit 1 of  
time slot 0 of each even-numbered frame of the next submultiframe.  
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At the receiving end, the checksum is calculated again on each  
submultiframe and then compared against the original checksum (sent by  
the transmitting end in the next submultiframe). The results are reported by  
two bits multiplexed in bit 1 of time slot 0 in frames 13, 15 of the CRC-4  
multiframe, respectively. Errors are counted and used to prepare statistic  
data on transmission performance.  
E1 (CEPT) Line Signal  
The basic E1 line signal is coded using the High-Density Bipolar 3 (HDB3)  
coding rules. The HDB3 coding format is an improvement of the Alternate  
Mark Inversion (AMI) code.  
In the AMI format, “ones” are alternately transmitted as positive and  
negative pulses, whereas “zeros” are transmitted as a zero voltage level. The  
AMI format cannot transmit long strings of “zeros”, because such strings do  
not carry timing information.  
The HDB3 coding rules restrict the maximum length of a “zero” string to  
three pulse intervals. Longer strings are encoded at the transmit end to  
introduce non-zero pulses. To allow the receiving end to detect these  
artificially-introduced pulses and to enable their removal to restore the  
original data string, the encoding introduces intentional bipolar violations in  
the data sequence. The receiving end detects these violations and when  
they appear to be part of an encoded “zero” suppression string - it removes  
them.  
Bipolar violations which are not part of the HDB3 zero-suppression string  
are assumed to be caused by line errors, and are counted separately, to  
obtain information on the quality of the transmission link when the CRC-4  
function is not used.  
E1 Line Alarm Conditions  
The loss of frame alignment (also called loss of synchronization) condition  
is declared when too many errors are detected in the frame alignment signal  
(FAS), e.g., when 3 or 4 FAS errors are detected in the last 5 frames. Loss of  
frame alignment is cleared after no FAS errors are detected in two  
consecutive frames. The loss of frame alignment is reported by means of the  
A bit (see Figure 1-5).  
The alarm indication signal (AIS) is an unframed “all-ones” signal, and is  
used to maintain line signal synchronization in case of loss of input signal,  
e.g., because an alarm condition occurred in the equipment that supplies  
the line signal. Note that the equipment receiving an AIS signal loses frame  
synchronization.  
The excessive bit error rate is measured on the frame alignment signal. The  
alarm threshold is an error rate higher than 10-3 that persists for 4 to 5  
seconds. The alarm condition is canceled when the error rate decreases  
below 10-4 for 4 to 5 consecutive seconds.  
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HDSL Environment  
Transmission Media  
HDSL systems are intended to operate on the local subscriber plant, which  
typically uses a mixture of unshielded twisted-wire pairs. Moreover, it is also  
necessary to tolerate bridged taps. HDSL systems properly operate on this  
media. The only requirement is that the lines must not be loaded. In  
addition, it is assumed that the nominal impedance of the pairs is 135,  
and that the pairs are balanced with respect to ground.  
Because of the variance in the transmission characteristics of the lines, HDSL  
systems must compensate for the differential transmission delay between the  
lines being used by a given system.  
HDSL Line Signal  
The line code on the HDSL line is 2B1Q (2 Binary, 1 Quaternary). This is a  
four-level pulse-amplitude modulation code without redundancy, under  
which each pair of information bits is converted to a quaternary symbol,  
called quat (bits can assume two levels, whereas quats have four levels).  
The encoding rule of the 2B1Q code is as follows:  
Binary Digits Quaternary Symbol  
00  
01  
10  
11  
-3  
-1  
+3  
+1  
The levels of the quaternary signal are symmetrically located around the 0V,  
and the nominal peak symbol level specified by the HDSL standards is  
2.64V. Figure 1-6 illustrates the 2B1Q encoding rule.  
+3 (+2.64V)  
+1 (+0.88V)  
(0.00V)  
time  
-1 (-0.88V)  
-3 (-2.64V)  
Quats -1  
+3  
10  
+1  
11  
-3  
-3  
+1 +3  
11 10  
-3  
-1  
-1  
+1  
11  
-1  
-3  
+3  
10  
+3  
10  
-1  
+1  
11  
01  
00  
00  
00  
01  
01  
01  
00  
01  
Bits  
Figure 1-10 2B1Q Encoding Rule  
Due to the encoding of two bits into one symbol, the symbol rate on the  
HDSL line is half the bit rate. Taking into consideration a payload rate of  
2048 kbps and framing overhead, for two-loop operation the required  
per-loop data rate is 1168 kbps (equivalent to a symbol rate of 584 kbaud).  
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By reducing the line symbol rate, the maximum range that can be reached is  
increased. Together with the advanced digital signal processing techniques  
implemented in HDSL systems, this results in a robust data transmission  
system that can reliably operate over regular unconditioned local loops,  
while exceeding several times the ranges that can be achieved by direct  
transmission of an E1 signal.  
HDSL Line Signal Structure  
The HDSL line signal is organized in frames. Each frame has a nominal  
duration of 6 msec: this translates to 3504 quats (7008 bits) for two-loop  
systems. However, due to the use of stuffing, frames without stuffing quats  
are actually one quat shorter, while frames with stuffing are one quat longer  
than the nominal.  
The HDSL frames carry the following types of data:  
Core frames  
Synchronization words  
HDSL overhead quats  
A core frame consists of 144 bytes (1152 bits). The structure of the core  
frames depends on the type of data being carried. The core frames are split,  
on a per byte basis, for transmission in parallel over the HDSL lines.  
Figure 1-11 shows the mapping of the 32 application time slots of the core  
frame into the two groups of 18 time slots carried by the two HDSL lines:  
Time slots 0 and 16 are carried in parallel on both HDSL lines.  
HDSL line 1 carries the odd-numbered application time slots up to  
time slot 16, and then even-numbered application time slots.  
HDSL line 2 carries the even-numbered application time slots up to  
time slot 16, and then odd-numbered application time slots.  
The last HDSL time slot is filled with ones (AIS signal).  
The synchronization word consists of 7 quats, and its function is to enable  
HDSL frame alignment.  
16 HDSL overhead quats are used to carry the following data:  
Indications such as far-end block error (FEBE), loss of signal and bipolar  
violations on the E1 interface.  
Embedded operations channel (eoc). The eoc allows supervision and  
management of system operation (status, diagnostic loopbacks and tests,  
repeater support, etc.) or vendor-defined functions (e.g., configuration  
downloading).  
Identification of the HDSL line number (seven quats). This allows the  
receiver to detect unintentional interchange of pairs.  
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2048 kbps Data at  
the Application  
Frame Interface  
Time Slots Inserted  
in Core Frame with  
2048 kbps Data  
HDSL  
Line  
1
HDSL  
Line  
2
TS0  
TS0  
0
TS0  
TS1  
1
TS0  
TS1  
TS0  
TS2  
TS1  
2
TS2  
TS2  
3
TS3  
TS3  
4
TS4  
TS4  
5
TS3  
TS4  
TS5  
TS5  
6
TS6  
TS6  
7
TS5  
TS6  
TS7  
TS7  
8
TS8  
TS8  
9
TS7  
TS8  
TS9  
TS9  
10  
11  
12  
13  
14  
15  
16  
17  
18  
19  
20  
21  
22  
23  
24  
25  
26  
27  
28  
29  
30  
31  
32  
TS10  
TS11  
TS12  
TS13  
TS14  
TS15  
TS16  
TS17  
TS18  
TS19  
TS20  
TS21  
TS22  
TS23  
TS24  
TS25  
TS26  
TS27  
TS28  
TS29  
TS30  
TS31  
TS10  
TS11  
TS12  
TS13  
TS14  
TS15  
TS16  
TS16  
TS17  
TS18  
TS19  
TS20  
TS21  
TS22  
TS23  
TS24  
TS25  
TS26  
TS27  
TS28  
TS29  
TS30  
TS9  
TS10  
TS12  
TS14  
TS16  
TS17  
TS19  
TS21  
TS23  
TS25  
TS27  
TS29  
TS11  
TS13  
TS15  
TS16  
TS18  
TS20  
TS22  
TS24  
TS26  
TS28  
Mapping into  
Core Frames  
Mapping to the  
two HDSL Lines  
TS31  
AIS  
33  
34  
35  
TS30  
TS31  
AIS  
AIS  
AIS  
Figure 1-11 Mapping of Core Frame into HDSL Frames  
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HDSL-Related System Functions  
The HDSL subsystem performs the following main functions:  
Mapping of input data bits into HDSL frames, for transmission on the  
HDSL lines  
Start-up process  
Frame alignment  
Loop identification and correction  
System management by means of the eoc channel  
Collection of performance data.  
To achieve proper operation, the management of the HDSL subsystem is  
performed under the control of the central unit (LTU) unit, which provides  
the timing reference for HDSL line transmission, and manages the  
communication on the eoc channel with the remote unit (the NTU) located  
on the customer's side.  
The transmission of data on each HDSL line is full duplex. To enable duplex  
transmission over one pair, the HDSL transceivers use an echo canceler,  
based on advanced digital signal processing (DSP) techniques. When starting  
system operation, the echo canceler is “trained”, to enable the separation of  
the received signal from the transmit signal (near-end crosstalk - NEXT). The  
training is performed by transmitting a special sequence for a predetermined  
period. This process is called “start-up process”; data transmission can start  
only after its successful completion.  
Interaction between E1 Port and HDSL Lines  
In case the E1 sublink interface loses synchronization, a loss of input data  
indication signal is sent via the HDSL lines.  
In case an HDSL line interface loses synchronization, idle code is inserted in  
the E1 data stream time slots, which have been assigned to this line.  
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1.4 Technical Specifications  
Compliance  
ETSI TR-152  
Dual duplex, 2B1Q line coding  
HDSL Interface  
Signal Format  
Line Baud Rate  
584 kbaud (equivalent to 1168 kbps), for each  
pair  
Line Type  
Two unconditioned, unloaded twisted pairs  
135Ω  
Impedance  
Transmit Pulse Shape  
Transmit Signal Power  
Loop Loss  
As per ETSI TR-152  
+13.5 dBm 0.5 dBm  
31 dB max at 150 kHz (584 kbaud)  
Range  
- Without H-RPT  
Up to 3.8 km (2.4 miles) for 26 AWG (0.4 mm)  
Up to 4.8 km (3.0 miles) for 24 AWG (0.5 mm)  
- With H-RPT  
Up to 7.2 km (4.5 miles) for 26 AWG (0.4 mm)  
from central to remote unit  
Up to 9.2 km (5.7 miles) for 24 AWG (0.4 mm)  
from central to remote unit  
Return Loss  
16 dB minimum, 25 kHz to 317 kHz @ 135Ω  
Maximum 50 µs at 150 kHz  
Automatic adaptive equalizer  
RJ-45  
Differential Line Delay  
Equalizer  
Connector  
Applicable Standards  
Framing  
ITU-T Rec. G.703, G.704, G.706, G.732,  
G.823  
E1 Sublink  
Interface  
- G732N, no multiframe, intended for use with  
CCS, without CRC-4  
- G732N, no multiframe, intended for use with  
CCS, with CRC-4  
- Transparent transfer of frame, for unframed  
operation or use with proprietary framing  
Nominal Line Data Rate  
Line Code  
2.048 Mbps  
HDB3  
Line Impedance  
(user-selectable)  
- 120, balanced  
- 75, unbalanced  
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Signal Levels  
Transmit Levels  
- Balanced interface: 3V 10%  
- Unbalanced interface: 2.37V 10%  
0 to -10 dB  
Receive LEVELS  
Jitter Performance  
Connectors  
Per ITU G.823  
- Balanced interface: 8-pin RJ-45 female  
connector  
- Unbalanced interface: two BNC coaxial  
connectors  
Data Rate  
Multiples of 56 or 64 kbps, up to 2.048 Mbps  
Data Channel  
Interface  
Interface Connectors  
RS-530  
25-pin D-type female  
V.35  
34-pin male (via adapter cable)  
37-pin D-type male (via adapter cable)  
15-pin D-type male (via adapter cable)  
RJ-45 (10BaseT) or BNC (10Base2)  
RJ-45  
RS-449/V.36  
X.21  
IR-ETH  
IR-ETH/Q  
IR-IP  
RJ-45  
E1 Sublink with CRC-4  
Per ITU G.706  
Statistics  
(Performance  
Monitoring)  
E1 Sublink without CRC-4  
Bipolar violations (BPV)  
HDSL Performance  
Per ITU G.826  
LCD  
2 rows × 16 characters  
CURSOR, SCROLL, ENTER  
Front Panel  
Controls  
Push Buttons  
E1 Sublink  
HDSL Lines  
Status  
E1 LOS - LOC  
E1 LOS - REM  
Indicators  
HDSL LOS - LINE A  
HDSL LOS - LINE B  
TST  
ALM  
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Technical Specifications  
1-25  
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Chapter 1 - Introduction  
HCD-E1 Installation & Operation Manual  
- HDSL main link local loopback, towards the  
E1 sublink and data channels of the local  
unit  
Loopbacks  
Diagnostics  
- Channel loopback on the local unit towards  
the DTE connected to the data channel of  
the remote unit (per channel)  
- Channel loopback on the remote unit  
towards the DTE connected to the data  
channel of the local unit (per channel)  
- Channel loopback on the local unit towards  
the DTE connected to its data channel (per  
channel)  
- In-band code-activated loopback on the  
remote unit towards the DTE connected to  
the data channel of the local unit  
- E1 sublink loopback on the local unit  
towards the equipment connected to the E1  
sublink of the local unit  
- E1 sublink loopback on the local unit  
towards the equipment connected to the E1  
sublink of the remote unit  
- E1 sublink loopback on the remote unit  
towards the equipment connected to the E1  
sublink of the local unit.  
- H-RPT local line loopback towards the  
LTU-configured unit (available from the  
LTU-configured unit in applications with an  
H-RPT)  
BERT Functionality  
BER measurement through remote HCD-E1  
(per data channel)  
HDSL Link  
Timing  
Receive Timing  
Always recovered from the received HDSL  
signal  
Transmit Timing  
(user-selectable)  
- Internal timing, derived from a local  
50 ppm oscillator  
- External timing, locked to the transmit clock  
of a selected synchronous channel or to the  
E1 sublink clock signal  
- Loopback timing (remote unit only): locked  
to the recovered HDSL receive signal of the  
central unit  
1-26  
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Chapter 1 - Introduction  
E1 Sublink  
Receive Timing  
Always recovered from the E1 sublink receive  
data signal  
Transmit Timing  
(user-selectable)  
Follows the transmit timing of the HDSL link.  
Synchronous Data  
Channels  
- DCE timing mode: HCD-E1 data channel  
provides transmit and receive clocks for the  
DTE connected to the data port.  
- DTE1 timing mode: HCD-E1 data channel  
sends the receive data accompanied by the  
receive clock, derived from the main system  
clock, to the DTE connected to the data  
port, and accepts data from DTE according  
to the DTE transmit clock.  
- DTE2 timing mode: HCD-E1 data channel  
transmits and receives data according to the  
clock signals provided by the equipment  
connected to the data port. (not available on  
channels with X.21 interface).  
Interface  
V.24/ RS-232, asynchronous DCE interface for  
direct connection of control terminal or  
dial-up modem  
Supervisory Port  
Data Rate  
300, 1200, 2400, 4800, 9600 bps, with  
Autobaud option  
Word Format  
- One start bit  
- 7 or 8 data bits  
- Parity: none, odd, or even  
- One stop bit  
Connector  
Function  
9-pin D-type, female  
Floating pair of NO and NC contacts  
Alarm Relay  
Physical  
Contact Ratings  
Open-circuit: maximum 60 VDC  
Short-circuit: maximum 0.25A  
Depth  
Width  
Height  
Weight  
243 mm / 9.5 in  
215 mm / 8.5 in  
43.7 mm / 1.75 in (1 U)  
1.5 kg / 3.5 lb  
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HCD-E1 Installation & Operation Manual  
AC Source  
DC Source  
100 ÷240 VAC, 50 or 60 Hz  
Power  
-48 VDC (-36 VDC to -72 VDC)  
Operating Temperature  
Relative Humidity  
0 ÷50°C (32 ÷122°F)  
Environment  
Up to 90%, non-condensing  
1-28  
Technical Specifications  
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Chapter 2  
Installation and Setup  
This chapter describes installation procedures for the standalone HCD-E1  
device. For instructions on installation of one or two units in a 19-inch rack,  
refer to the Rack Mounting Kit for 19-inch Racks guide that comes with the  
RM kit.  
After installing the unit:  
Refer to Chapter 3 for detailed system configuration information and  
procedures using the front panel controls.  
Refer to Chapter 4 for detailed system configuration procedures using an  
ASCII terminal, TELNET host, or SNMP agent connected to the HCD-E1  
control port.  
In case a problem is encountered, refer to Chapter 5 for test and diagnostics  
instructions.  
Internal settings, adjustment, maintenance, and repairs may be  
performed by only by a skilled technician who is aware of the hazards  
involved.  
Warning  
Always observe standard safety precautions during installation,  
operation and maintenance of this product.  
2.1 Site Requirements and Prerequisites  
An AC-powered HCD-E1 units should be installed within 1.5m (5 ft) of an  
easily-accessible grounded AC outlet capable of furnishing the required  
supply voltage, in the range of 100 to 240 VAC.  
A DC-powered HCD-E1 units require a -48 VDC power source, which must  
be adequately isolated from the mains supply. In order to prevent a fire  
hazard, a suitable fuse must be installed in the -48 VDC line.  
Allow at least 90 cm (36 in) of frontal clearance for operator access and at  
least 10 cm (4 in) clearance at the rear of the unit for interface cable  
connections.  
Caution  
Do not stack units one on top of another.  
The ambient operating temperature of the HCD-E1 should be 0 to 50°C  
(32 to 122°F), at a relative humidity of up to 90%, non-condensing.  
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Site Requirements and Prerequisites  
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HCD-E1 Installation & Operation Manual  
2.2 Package Contents  
The HCD-E1 package includes the following items:  
HCD-E1 unit  
HCD-E1 Installation and Operation Manual  
AC power cord or DC power supply connector kit.  
Interface adapter cable/s (interface ordering options, see Connecting the  
Interfaces later in this chapter).  
2.3 Installation and Setup  
HCD-E1 is a standalone device designed for tabletop or bench installation. It  
is delivered completely assembled. No provision is made for bolting the unit  
to the tabletop.  
To complete the installation of HCD-E1, you must perform the following (in  
the given order):  
Determine the required configuration of HCD-E1, according to your  
application, and set the internal jumpers and switches accordingly.  
Connect the E1 sublink, the HDSL lines, the data channels and the  
control port, if necessary.  
Connect power to the unit.  
These procedures are described on the following pages.  
This section provides information on the functions of the internal jumpers  
and switches, to help you in the selection of the correct setting for particular  
application, and gives step-by-step instructions for performing the internal  
settings. The default settings are also listed.  
Setting the  
Internal Jumpers  
and Switches  
All the other configuration actions can be performed from the front panel or  
from a control terminal, after the installation is completed. Information and  
detailed instructions for these operations appear in Chapter 3 and  
Chapter 4, respectively.  
HCD-E1 Printed Circuit Boards  
HCD-E1 comprises three printed circuit boards (PCBs): the main board and  
two interface PCBs.  
Figure 2-1 shows the location and identification of the boards installed in the  
HCD-E1 unit.  
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Installation and Setup  
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Chapter 2 - Installation and Setup  
RJ-45  
Connector  
S1  
ON  
Data Channel 2  
Interface Board  
Sublink  
Interface Board  
Jumper C/R  
C
Central  
Unit  
Remote  
Unit  
R
J10  
FGND/GND  
ON  
FGND/GND  
ON  
Connected  
OFF  
Not  
Connected  
OFF  
Figure 2-1 HCD-E1 - Identification of Boards, Jumpers and Switches  
The Main Board contains the common signal processing circuits, the  
interfaces to the main link (HDSL) and the Data Channel 1 interface. A DIP  
switch unit (S1) and two jumpers (JP4 and JP8) are provided for user settings.  
The board contains additional jumpers which are factory-set and should not  
be changed by the user.  
The Data Channel 2 Interface Board provides the connections of data  
channel 2. The board does not have any user-set jumpers or switches  
(except for the Ethernet board, see Appendix C and Appendix D).  
The E1 Sublink Interface Board provides the E1 connections and contains  
several user-set jumpers.  
To set the internal jumpers and switches, you must do the following in this  
order:  
Open the HCD-E1 case  
Set the Main Board Jumpers and Switch, referring to Figure 2-1.  
Remove the E1 Sublink Internal Board, if it is necessary to modify its  
settings.  
Identify jumper and switch locations and settings on the Sublink Interface  
Board (referring to Figure 2-4) and change settings as required.  
Reinstall the E1 Sublink Interface Board, if it has been removed.  
Reinstall the HCD-E1 cover.  
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Installation and Setup  
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HCD-E1 Installation & Operation Manual  
Access to the inside of the equipment is permitted only to authorized  
and qualified service personnel.  
Warning  
To avoid accidental electric shock, always disconnect the interface  
cables and the power cord before removing the unit from its casing.  
Line voltages are present inside HCD-E1 when it is connected to power  
and/or to the lines. Moreover, under external fault conditions  
dangerous voltages may appear on the lines connected to the unit.  
Any adjustment, maintenance, and repair of the opened instrument  
under voltage should be avoided as much as possible and, when  
inevitable, should be carried out only by a skilled technician who is  
aware of the hazard involved. Capacitors inside the instrument may  
still be charged even after the instrument has been disconnected from  
its source of supply.  
HCD-E1 contains components sensitive to electrostatic discharge (ESD). To  
prevent ESD damage, avoid touching the internal components. Before  
moving jumpers, touch the HCD-E1 frame.  
Caution  
Opening the HCD-E1 Case  
To reach the internal jumpers and switches of HCD-E1, it is necessary to  
open its case. To do this, proceed as follows:  
1. Disconnect all the cables connected to the HCD-E1.  
2. Turn the unit over (bottom facing up).  
3. Unscrew the four cover screws (see Figure 2-2) and keep them in a safe  
place.  
4. Turn the unit over (bottom facing down).  
5. After the four screws are released, remove the HCD-E1 top cover by  
pulling it straight up.  
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Installation and Setup  
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Chapter 2 - Installation and Setup  
Cover Screws  
(4 Places)  
Figure 2-2 Identification of Cover Screws  
Setting the Main Board Internal Jumpers and Switches  
The internal jumpers and switches located on the HCD-E1 main board are  
identified in Figure 2-1. The functions of jumpers and switches are described  
below.  
Switch S1  
DIP switch S1 allows you to enforce the default password and node number  
(section 4) or reload the desired group of default parameters (sections 2 and  
3). Any changes in switch section positions must be performed on a unit not  
connected to power.  
If you want to change the hardware configuration of your HCD-E1 (for  
example, remove an E1 sublink or one of the data channels from the unit),  
you will have to reload its database with default parameters (see below and  
the DB INIT command in Chapter 4).  
Note  
Switch section 1 not used in this unit and is reserved as spare.  
Switch section 2 – DB INIT. This section selects the source of the  
database configuration parameters:  
ON  
HCD-E1 uses the default parameters stored in its  
EPROM for reloading of the database.  
OFF  
HCD-E1 uses the parameters stored in the database.  
HCD-E1 is delivered with the database loaded with the default  
parameters. If needed, you can move the switch to the ON position  
again, to reload the database and restart HCD-E1 with the default  
parameters.  
HCD-E1 is shipped with section 2 set at OFF.  
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Installation and Setup  
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Chapter 2 - Installation and Setup  
HCD-E1 Installation & Operation Manual  
Switch section 3 – DEF SP. This section selects the source of the  
control port parameters:  
ON  
HCD-E1 uses the default parameters stored in its  
program EPROM. For the default values, see Table 3-4  
in Chapter 3.  
OFF  
HCD-E1 uses the parameters stored in the database.  
HCD-E1 is shipped with section 3 set at OFF.  
Switch section 4 – PASSWD. To prevent unauthorized personnel from  
using the HCD-E1 supervision program, you can use password  
protection with a password, consisting of up to eight alphanumeric  
characters. HCD-E1 is delivered with a default password, HCD, but  
normally the password is selected by the user.  
ON  
HCD-E1 uses the default password.  
OFF  
HCD-E1 uses the user-selected password.  
HCD-E1 is shipped with section 4 set at OFF.  
You can make HCD-E1 temporarily use default values of the password  
(control port parameters) without erasing the user-selected values from the  
database. To do this, set the PASSWD (DEF SP) section to ON, leaving DB  
INIT at OFF and turn the unit on. Then, when you turn HCD-E1 off, reset the  
appropriate section to OFF and turn the unit on again, HCD-E1 will use the  
user-selected parameters.  
Note  
R/C Function Selection Jumper, JP4  
The jumper JP4 (R/C) is used to select the function of the HCD-E1 unit:  
C
R
HCD-E1 operates as a central unit (LTU).  
HCD-E1 operates as a remote unit (NTU).  
HCD-E1 is shipped with the jumper set at C.  
FGND/GND Jumper, JP8  
The FGND/GND jumper is used to control the connection between the  
internal signal ground and the frame ground.  
ON  
Ground is shorted to the frame ground.  
OFF  
Ground is not shorted to the frame ground.  
HCD-E1 is shipped with the jumper set at ON.  
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Installation and Setup  
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Chapter 2 - Installation and Setup  
Setting the FGND/GND jumper to OFF may make the equipment unsafe  
for direct connection to unprotected telecommunication networks at  
locations where constant excessive voltages may be present on the  
lines.  
Warning  
Removing the E1 Sublink Interface Board  
The E1 sublink interface board is located over the main board, and is  
installed with the component side facing the main board. It is electrically  
connected to the main board by means of a flat cable via the J10 connector  
on the main board (see Figure 2-1).  
The E1 sublink interface board is attached to the main board by means of  
two metal spacers. The two spacers near the rear panel are also used to  
provide a low-resistance path to ground.  
The board is connected by wires to the E1 sublink BNC connectors, which  
are fastened to the rear panel. These wires do not have to be disconnected  
when the sublink interface board is removed.  
Figure 2-3 explains how to remove the sublink interface board. Use the  
following procedure:  
1. Identify the two nuts that fasten the sublink interface board to the  
spacers.  
2. Remove the nuts and their washers.  
3. Disconnect the flat cable from the connector J10 on the main board  
(see Figure 2-1).  
4. Hold the sublink interface board from its sides, and carefully pull it  
straight up. Once the board is free, turn the board over the rear panel,  
and let it rest on the work table. Do not strain the wires connecting the  
board to the BNC connectors.  
Turn Board  
Sublink  
Interface  
Board  
Remove Nuts  
Over  
and Washers  
(2 Places)  
CABLE  
CONNECTORS  
Figure 2-3 Removal of Sublink Interface Board  
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Setting the Sublink Interface Board Jumpers  
Figure 2-4 shows the component side of the E1 sublink interface board, as  
seen after it is removed from the unit.  
The interface board has protection fuses for the surge protection circuits  
located on the line side of the line isolation transformers. These fuses are also  
identified in Figure 2-4.  
Note  
JP17  
Figure 2-4 E1 Sublink Interface Board, Internal Settings  
Set the jumpers as follows:  
Interface Selection Jumpers, JP9, JP12, JP16, and JP17  
The jumpers JP9 and JP12 and the double jumper JP16-JP17 are used to  
select the E1 sublink interface. All the jumpers must be always set to the  
same position (either BAL or UNBAL).  
For operation with the balanced interface:  
Set the jumper JP12 to BAL E1.  
Set the jumpers JP16 and JP17 to BAL.  
Disconnect the jumper JP9.  
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For operation with the unbalanced interface:  
Set the jumper JP12 to UNBAL E1.  
Set the jumpers JP16 and JP17 to UNBAL.  
Connect the jumper JP9.  
HCD-E1 is shipped with all the jumpers set for balanced interface.  
E1 Sublink Transmit Side Ground Reference Jumper, JP8  
The jumper JP8 controls the ground reference of the E1 sublink transmit  
output when working with the unbalanced interface.  
In accordance with ITU-T recommendations, this jumper is an option when  
the unbalanced interface is used (the line is normally grounded at the  
transmit side).  
HCD-E1 is shipped with the jumper not installed (operation with  
balanced interface).  
E1 Sublink Receive Side Ground Reference Jumper, JP10  
The jumper JP10 controls the ground reference of the E1 sublink receive  
output when working with the unbalanced interface.  
In accordance with ITU-T recommendations, this jumper is an option when  
the unbalanced interface is used (the line is normally grounded at the  
transmit side).  
HCD-E1 is shipped with the jumper not installed (operation with  
balanced interface).  
Reinstalling the E1 Sublink Interface Board  
If during the procedure the E1 sublink interface board has been removed,  
reinstall it by reversing the procedure described above. Pay special attention  
to the following:  
Mate correctly the flat cable connector with the corresponding main  
board connector.  
Make sure that the RJ-45 connector has been properly inserted into its  
place in the rear panel, and none of the BNC connectors wires have  
been damaged.  
Make sure to place the original washers under each nut. Fasten the nuts  
tightly. Pay particular attention to proper fastening to the two spacers  
located near the rear panel.  
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Installation and Setup  
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Reinstalling the HCD-E1 Cover  
After completing the internal settings, reinstall the top cover as follows:  
1. Position the lower half of the HCD-E1 case on a flat, clean surface.  
Check that the decorative black plastic strips on the sides of the unit are  
still in place (if not, place the strips in the grooves on the sides of the  
lower half).  
2. Identify the front and the rear of the top cover, and position the cover  
on the lower half of the HCD-E1, so that the cover guides are located  
just above the holes in the lower half. Close the cover and ensure that  
the protruding tips of the cover guides enter the corresponding recesses  
in the lower half.  
3. Hold the cover in place and turn the assembly over, to gain access to the  
bottom of the unit.  
4. Insert the original cover screws in their positions and tighten carefully.  
Do not use excessive torque.  
Figure 2-5 shows a typical rear panel of a standard HCD-E1 unit and  
identifies its connector locations.  
Connecting the  
Interfaces  
RX OUT  
TX IN  
SUB E1  
P
O
W
E
R
CH.2  
CH.1  
CHANNEL  
HDSL  
LINE B  
NETWORK  
LINE A  
5
1
2
4
ALM RLY  
Figure 2-5 HCD-E1 Rear Panel (AC Powered Unit)  
Connecting the E1 Sublink  
The balanced interface of the E1 sublink is terminated in an RJ-45  
connector. Appendix B provides the pin allocation for this connector.  
The unbalanced interface is terminated in two BNC connectors.  
Connect the E1 sublink cable(s) to the connector(s) corresponding to the  
interface in use. Do not connect to both the balanced and unbalanced  
connectors!  
When using the DTE with balanced interface, connect the DTE cable to  
the RJ-45 connector designated SUB E1.  
When using the DTE with unbalanced interface, connect the DTE cable  
to the two BNC connectors designated RX/OUT and TX/IN. Pay attention  
to correct connection of the receive and transmit cables to the RX/OUT  
and TX/IN connectors.  
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Installation and Setup  
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Chapter 2 - Installation and Setup  
Connecting the Data Channels  
HCD-E1 typically has two data ports, each terminated in a 25-pin D-type  
female connector. The units with an Ethernet interface arrive with the  
Ethernet interface module built in the upper port. For the description of the  
Ethernet interface, see Appendix C and Appendix D.  
When using the RS-530 interface, equipment with RS-530 interface can be  
directly connected to the data channel connector using standard cables.  
Equipment with V.36/RS-422/RS-449, X.21 and V.35 interfaces can be  
connected by means of adapter cables, supplied with the unit. Table 2-1 lists  
these cables and describes their applications.  
You can also prepare these cables yourself in accordance with the port  
connector wiring information given in Appendix B.  
Table 2-1 HCD-E1 Interface Adapter Cables  
Interface  
Data Equipment  
Cable  
Length  
Port  
V.35 DCE  
V.35 DTE  
CBL-HS2V1 1.5m (5 ft)  
CBL-HS2V2 1.5m (5 ft)  
CBL-HS2V3 1.5m (5 ft)  
CBL-HS2R1 1.5m (5 ft)  
CBL-HS2R2 1.5m (5 ft)  
CBL-HS2R3 1.5m (5 ft)  
CBL-HS2X1 0.36m (1.2 ft)  
V.35 DTE1  
V.35 DTE2  
RS-422 DCE  
RS-422 DTE1  
RS-422 DTE2  
RS-422 DCE  
V.35 DCE  
V.35 DCE  
RS-422 DTE  
RS-422 DCE  
RS-422 DCE  
X.21 DTE  
When using adapter cables, first connect the adapter cable to the channel  
connector, and then connect the data cable to the adapter connector.  
Connecting the HDSL Lines  
To connect the remote equipment (HDSL lines) to HCD-E1, connect the  
cable to the RJ-45 connector designated NETWORK HDSL. Appendix B  
provides the pin allocation for this connector.  
Connecting the HCD-E1 Alarm Relay Port  
The alarm relay contacts are available in a special RJ-11, 4-pin connector. To  
connect HCD-E1 to alarm equipment, you will have to prepare a special  
cable according to the following pinout.  
Pin  
1
Function  
Common  
NC  
2
3
NO  
4
not in use  
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Connecting the Control Port  
If you are using the control terminal, connect a cable prepared in  
accordance with Appendix B between the control port connector,  
designated CONTROL DCE (see Figure 3-1 in Chapter 3), and the control  
terminal. If the control terminal is connected via modems, use a cross-over  
cable.  
The various interface cables should be shielded, in order to comply with FCC  
rules. HCD-E1 and its data interfaces will work well even if the cables are not  
shielded, but some radio interference may occur.  
Note  
To connect the power to HCD-E1, refer to the appropriate section below,  
depending on your version of the unit (AC or DC).  
Connecting the  
Power  
Before switching on this instrument and connecting any other cable, the  
protective earth terminals of this instrument must be connected to the  
protective ground conductor of the mains power cord. If you are using  
an extension cord (power cable) make sure it is grounded as well.  
Warning  
Any interruption of the protective (grounding) conductor (inside or  
outside the instrument) or disconnecting the protective earth terminal  
can make this instrument dangerous. Intentional interruption is  
prohibited.  
For AC version, make sure that only fuses of the required rating, as  
marked on the rear panel, are used for replacement. Do not use  
repaired fuses or short-circuit the fuse holder. Always disconnect the  
mains cable before removing or replacing the fuse. Whenever it is likely  
that the fuse protection has been damaged, make the unit inoperative  
and secure it against unintended operation.  
AC Power Connection  
AC power should be supplied to the HCD-E1 through the 5 ft (1.5m)  
standard power cable terminated by a standard 3-prong plug  
(see Figure 2-5). The cable is provided with the unit.  
1. Check that the ON/OFF switch on the HCD-E1 rear panel is set to OFF.  
2. First, connect the power cable to the connector on the HCD-E1 rear  
panel, and then to the mains outlet.  
DC Power Connection  
To connect DC power to HCD-E1, refer to DC Power Supply Connection  
Supplement.  
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Chapter 3  
Front Panel Operating  
Instructions  
3.1 General  
This chapter contains detailed instructions for operating HCD-E1 from the  
front panel. The information presented in this chapter includes:  
HCD-E1 front panel - Section 3.2  
General description of HCD-E1 control, display and push-button  
functions, and menu organization - Section 3.3  
HCD-E1 configuration parameters - Section 3.4  
Operating procedures (turn-on, front-panel indications, performance  
monitoring and turn-off) - Section 3.5  
HCD-E1 local configuration setup - Section 3.6.  
For instructions on the use of a control terminal to control and monitor  
HCD-E1 operation remotely, refer to Chapter 4.  
3.2 Front Panel Controls, Connectors, and Indicators  
Figure 3-1 shows the front panel of HCD-E1. Table 3-1 lists the functions of  
the HCD-E1 controls, connectors and indicators, located on the HCD-E1  
front panel.  
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Front Panel Controls, Connectors, and Indicators  
3-1  
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11  
1 2 3  
7
4
8
10  
9
CONTROL  
DCE  
HCD-E1  
E1 LOS HDSL LOS  
LOC REM LINE A LINE B  
ALM  
TST  
CURSOR SCROLL ENTER  
6
5
Figure 3-1 HCD-E1 Front Panel  
Table 3-1 HCD-E1 Controls, Connectors and Indicators  
No  
Name  
Type  
Function  
1
E1 LOS LOC  
LED indicator  
Lights when the local E1 port loses frame synchronization to  
the incoming signal (in the UNFRAMED mode, the indicator  
lights when the incoming signal is corrupted or missing)  
2
E1 LOS REM  
LED indicator  
Lights when the equipment connected to the E1 port  
reports loss of synchronization. This indication is not  
available when the UNFRAMED mode is selected.  
3
4
HDSL LOS  
LINE A  
LED indicator  
LED indicator  
Lights when the HDSL line A (line 1) circuits lose  
synchronization to the incoming signal  
HDSL LOS  
LINE B  
Lights when the HDSL line B (line 2) circuits lose  
synchronization to the incoming signal  
5
6
TST  
LED indicator  
LED indicator  
Lights when a test is active  
ALM  
Lights when ON-state alarms (for explanation of the term  
see Section 5.2, Status Indications and Alarms, in Chapter 5)  
are stored in the HCD-E1 alarm buffer  
7
Alphanumeric  
display  
Liquid crystal display (LCD) used to display messages and  
status information. The display contains 2 rows of 16  
characters each.  
8
9
CURSOR  
SCROLL  
Push button  
Push button  
Used to move among the information fields on the LCD  
Used to scroll among the available options displayed on the  
LCD  
10  
11  
ENTER  
Push button  
Connector  
Used to confirm the changes made in HCD-E1 operation  
Connection to control terminal  
CONTROL  
DCE  
3-2  
Front Panel Controls, Connectors, and Indicators  
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3.3 Control of HCD-E1 Operation  
The HCD-E1 operating mode is determined by a set of parameters stored in  
an internal non-volatile memory. To select these parameters, you can use  
the HCD-E1 front panel push buttons or a control terminal.  
General  
After the operating parameters have been loaded (this process is called  
configuration setup), HCD-E1 no longer requires operator attendance.  
The configuration selected by the user and stored in the HCD-E1 memory is  
not affected when power is turned off. Upon turn-on, HCD-E1 checks the  
validity of the stored configuration data, and after the self-test takes the last  
selected configuration (unless you have changed the default setting of DIP  
switch S1, Section 2, from OFF to ON, as described in Chapter 2,  
Installation). If the configuration does not require modification, HCD-E1 is  
ready for operation immediately after power is applied. However, if the  
configuration data is corrupted, HCD-E1 loads a default configuration  
instead. The default configuration, prepared by the manufacturer, is stored  
in the EPROM.  
All operations are performed using an interactive, menu-driven interface,  
controlled by the LCD and three push buttons. HCD-E1 guides you in the  
execution of the required task by means of messages and checks your  
inputs. Moreover, HCD-E1 will suggest you only those parameter values  
which are available on your HCD-E1 model in the selected operating mode.  
If you make a configuration error (for example, you select a parameter value  
that conflicts with the current operating mode), HCD-E1 rejects the  
erroneous selection and displays an error message that identifies the error.  
For detailed operating instructions, see Section 3.5 and Section 3.6.  
The HCD-E1 display has two rows:  
Organization of  
the LCD  
The upper row shows the header, which can be one of the following:  
- ALARM BUFFER  
- PORT DIAG  
- HDSL DIAG  
- TEST OPTION  
- Name of one of seven configuration parameter groups  
(see Section 3.4)  
The lower row displays the following information:  
Parameter name and value  
Status messages  
Test or loopback name and status  
Error messages  
Diagnostics messages  
Figure 3-2 shows the basic LCD menu structure.  
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FIRST ROW  
ALARM BUFFER  
SECOND ROW  
SCROLL CLEAR  
EMPTY  
SYSTEM PARAMETER  
CLK MASTER  
CLK_FBACK  
HCD TYPE  
CONFIG REM  
HRPT  
(only for the unit configured as central)  
(only for the unit configured as central)  
(only for the unit configured as central)  
TEST OPTION: SL  
LOCAL PORT  
REM PORT  
REM REM PORT  
LOCAL LINE  
LOCAL CH  
REM CH  
TEST OPTION: ML  
TEST OPTION: CHX*  
REM REM CH  
BERT  
INBAND LOOP  
LOCAL HRPT  
FRAME  
TEST OPTION: HRPT  
SL PARAMETERS  
(only for the unit configured as central)  
SYNC  
CRC-4  
MAP MODE  
NUM OF TS  
START TS  
TS_0 to TS_31  
IDLE CODE  
ERROR CRC...  
LST DEG MIN  
CURR ES ...  
L. TERM INT  
SPEED  
(only when MAP is selected as SEQ or ALT)  
PORT DIAG: SL  
(or BPV COUNT)  
(see Table 5-3)  
HDSL DIAG: LINEX*  
SP PARAMETERS  
(see Table 5-4)  
DATA  
PARITY  
INTERFACE  
AUX DEV  
FRAME  
(only for HCD-E1 configured as central)  
CHANNEL PRM: CHX*  
MULT  
MAP  
SPEED  
START TS  
CTS  
ETHER  
(only when data channel has Ethernet interface)  
(only when data channel has Ethernet interface)  
BRIDGING  
FIFO SIZE  
CLK MODE  
TS_0 to TS_31  
PATTERN  
BERT PRM  
ERR RATE  
DNLOAD PRM  
SL MODE  
ML MODE  
SL TS NUM  
ML TS NUM  
TS_1 to TS_31  
only if SL MODE is selected as DEDIC  
only if ML MODE is selected as DEDIC  
PB PARAMETERS  
* X denotes the number of an HDSL line or data channel. It can be 1 or 2.  
Figure 3-2 HCD-E1 LCD Basic Menu Structure  
3-4  
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The LCD displays four types of information messages:  
Information  
Displayed on the  
LCD  
Status messages (alarms)  
Diagnostics and performance monitoring data  
Test status  
Configuration parameters.  
Status Messages (Alarms)  
When HCD-E1 is not being configured and neither PORT DIAG nor HDSL  
DIAG is displayed, it displays one of the two screens that appear under the  
header ALARM BUFFER. If the alarm buffer contains status messages  
(ON-state alarms), the LCD second row shows “SCROLL CLEAR” and the  
ALM indicator is lit. Otherwise, the ALM LED is off, and the second row of  
the LCD shows “EMPTY”.  
For the definition of ON-state alarms, list of alarm messages and instructions  
how to work with them, refer to Section 5.2, Status Indications and Alarms,  
in Chapter 5.  
Diagnostics and Performance Monitoring Data  
HCD-E1 can display the E1 port traffic performance parameters gathered  
when operating with the CRC-4 function enabled. When the CRC-4  
function is disabled, the HCD-E1 can still display BPV statistics.  
In addition, HCD-E1 can display the HDSL line performance parameters.  
The diagnostics data appear under the headers PORT DIAG: SL and  
HDSL DIAG. For explanation of the diagnostics data parameters and their  
monitoring, refer to Section 5.3, Performance Diagnostics Data, in  
Chapter 5.  
Test Functions  
The test functions of HCD-E1 include:  
Local and remote loopbacks on the E1 port, data channels, and local  
loopback on the HDSL lines.  
Remote loopbacks on the E1 port and data channels of the remote unit.  
Bit error rate testing on each data channel.  
In-band activated remote loopback on each data channel  
Local loopback on the H-RPT (when working with the latter and your  
HCD-E1 is configured as central)  
The test options appear under the header TEST OPTION. For description of  
the test functions and instructions how to operate them, refer to Section 5.4,  
Diagnostic Tests, in Chapter 5.  
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Configuration Parameters  
HCD-E1 configuration parameters are divided into the following seven  
groups: system parameters (SYSTEM PARAMETER), sublink parameters  
(SL PARAMETERS), channel parameters (CHANNEL PRM), control port  
parameters (SP PARAMETERS), priority bumping parameters  
(PB PARAMETERS), BERT parameters (BERT PRM), and download  
parameters (DNLOAD PRM).  
Section 3.4 describes each group of parameters and provides practical  
configuration guidelines, where necessary.  
In addition to the parameters configured from the front panel, there are  
parameters that can be controlled only from the control terminal. These are  
described in Chapter 4.  
HCD-E1 operation is controlled by means of the LCD and the three push  
buttons designated CURSOR, SCROLL and ENTER. The same control actions  
are consistently used for all the activities:  
Using Front-Panel  
Push Buttons  
Cursor  
Use this push-button to indicate what you want to  
change. Pressing the CURSOR push button moves the  
cursor (a bar that indicates the selected field) among  
the fields in the current display.  
Scroll  
Some fields list several different items. You can change  
(“scroll”) the item indicated by the cursor by pressing  
SCROLL.  
Press this push button repeatedly to display the  
alternatives for the current field indicated by the cursor.  
Holding this button pressed causes automatic scrolling  
of the available alternatives.  
Enter  
Press this button once to select the value displayed in  
the field indicated by the cursor.  
If the selected value is valid, it replaces the old  
value and the change takes effect immediately.  
If your selection is incorrect, it is not accepted. In  
this case, HCD-E1 displays a CONFIG ERROR  
message with a two-digit code in the second display  
row. The code indicates what is wrong. After a short  
time, the error message disappears and HCD-E1  
returns to the original display. Now you can correct  
the error. Refer to Section 5.5 for the list of the error  
codes and description of what to do to correct the  
error.  
3-6  
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Additional Functions of ENTER  
The ENTER key has two additional functions:  
1. When the LCD displays the ALARM BUFFER screen, the ENTER key can  
be used to delete all the alarm messages in the buffer.  
2. When the LCD displays the PORT DIAG or HDSL DIAG screens, the  
ENTER key can be used to reset the performance monitoring counter  
being displayed (see Displaying Performance Data on the Front-Panel  
LCD in Chapter 5).  
3.4 Configuration Parameters  
This section lists the HCD-E1 configuration parameters and their functions.  
The information is organized in tables for each group of parameters:  
Group  
Display  
See...  
System parameters  
Sublink parameters  
SYSTEM PARAMETER  
SL PARAMETERS  
SP PARAMETERS  
Table 3-2  
Table 3-3  
Table 3-4  
Control port  
parameters  
Channel parameters CHANNEL PRM  
Table 3-5  
Table 3-6  
Table 3-7  
BERT parameters  
BERT PRM  
Download  
parameters  
DNLOAD PRM  
Priority bumping  
parameters  
PB PARAMETERS  
Table 3-8  
The tables also list the parameter values included in the HCD-E1 default  
configuration and important practical guidelines for configuring some of  
them.  
In addition to the parameters listed in the tables, HCD-E1 supports other  
parameters, which can be modified only via the control port. These  
parameters are explained in Chapter 4.  
Note  
System parameters can be set only on a unit configured as central.  
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Configuration Parameters  
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Table 3-2 System Parameters  
Designation  
Function  
Values  
Configuration Guidelines  
CLK MASTER*  
Selects the master INT  
Internal oscillator is selected  
Select SL for connection to carrier lines.  
timing reference.  
SL  
Locked to the recovered receive clock of the E1 sublink.  
For a point-to-point application with  
standalone equipment at both link  
ends, you can also select INT.  
CH1 or CH2 Locked to the external clock supplied to the  
corresponding data channel, provided the channel  
timing mode is DTE2.  
Prior to setting CLK MASTER to CH1 or  
CH2, you must set the timing mode of  
the corresponding channel to DTE2  
and assign at least one time slot (see  
Table 3-5, Channel Parameters, or the  
DEF CH command in Chapter 4).  
Default: INT  
Note: When HCD-E1 is configured as a remote unit, the CLK MASTER parameter doesn’t appear at all. The clock is always locked to the  
recovered receive clock of the HDSL line. This locks the outgoing timings of the E1 port and data channels to the timing of the HDSL  
signal. If both lines operate normally, HCD-E1 uses the recovered clock of line A (line 1); if line 1 fails, HCD-E1 automatically switches to  
the recovered clock of line 2.  
CLK_FBACK*  
Selects the  
alternate (fallback)  
system timing  
reference, for use  
in case the master  
reference fails.  
NONE  
No fallback source is used. In this case, the  
internal oscillator is automatically selected  
when the master reference fails.  
Select a source different from that  
selected as master. To disable switching  
to the fallback source, select NONE. In  
this case, the default fallback clock  
source is the HCD-E1 internal clock  
oscillator.  
SL  
Locked to the recovered E1 sublink receive clock.  
CH1 or CH2 Locked to the external clock supplied to the  
corresponding user data channel, provided the  
channel timing mode is DTE2  
Prior to setting CLK_FBACK to CH1 or  
CH2, you must set the timing mode of  
the corresponding channel to DTE2  
and assign at least one time slot.  
Default:  
NONE  
HCD TYPE  
Displays HCD-E1  
configuration  
mode  
CENTRAL  
REMOTE  
HCD-E1 configured as central unit  
HCD-E1 configured as remote unit  
3-8  
Configuration Parameters  
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Table 3-2 System Parameters (Cont.)  
Designation  
Function  
Values  
Configuration Guidelines  
CONFIG REM*  
Selects the ability  
to configure a  
remote unit  
YES  
Enables the downloading function. The configuration values  
selected for HCD-E1 configured as central unit are  
downloaded to the unit configured as remote, and determine  
the remote unit operating mode.  
NO  
Disables the downloading function.  
Default: YES  
HRPT  
Shows whether  
your HDSL link  
contains an H-RPT  
repeater  
YES  
NO  
The HDSL link contains H-RPT.  
There is no HDSL repeater on the HDSL link.  
* Parameters marked with an asterisk are displayed only when your HCD-E1 is configured as central unit.  
1. If in your application the downloading function is disabled (CONFIG REM at the central unit set to NO), and the unit  
configured as central is reset or restarted (for example, after power-up), its parameters may be automatically  
downloaded to the unit configured as remote, and replace the locally-modified parameters. In order for this not to  
happen, make sure that Section 2 (DB INIT) of the DIP Switch S1 of the unit configured as central is set to OFF (see  
“Setting the Internal Jumpers and Switches” in Chapter 2).  
Note  
2. A data channel or a sublink can serve as a timing reference only if at least one time slot is assigned to it. For details  
refer to Working with Time Slots section below.  
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Table 3-3 Sublink Configuration Parameters  
Designation  
Function  
Values  
Configuration Guidelines  
FRAME  
Selects the framing mode for the UNFRAMED The E1 sublink  
Select the framing mode specified for use in your  
network.  
sublink  
transparently transfers the  
incoming data stream on  
a bit-by-bit basis. This  
allows transfer of  
unframed 2048 kbps data  
streams, or of data  
When transferring unstructured data streams, or data  
streams with proprietary framing, select UNFRAMED.  
To select UNFRAMED, you have to assign all the 32 time  
slots.  
streams using any framing  
method (standard or  
proprietary).  
G732N  
Two frames per  
multiframe. Time slot 16  
is passed transparently.  
Default: G732N  
SYNC  
Permits to reduce the time  
required for the E1 sublink to  
return to normal operation after  
local loss of synchronization  
CCITT Complies with ITU-T Rec. G. 732  
FAST After 1 second  
Select CCITT, unless your application has special  
requirements  
(does not  
appear in  
UNFRAMED  
mode)  
62411 Similar to the requirements of  
AT&T TR-62411 (after  
10 seconds)  
Default: CCITT  
CRC-4  
Enables the generation of check NO  
CRC-4 option disabled  
CRC-4 option enabled  
Select YES, unless HCD-E1 is connected to equipment  
that does not support this capability.  
(does not  
appear in  
UNFRAMED  
mode)  
bits (in accordance with the  
CRC-4 polynomial specified by  
YES  
Default: NO  
ITU G.704) for the frames  
transmitted on the E1 sublink,  
and the checking of check bits  
carried by the frames  
3-10  
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Table 3-3 Sublink Configuration Parameters (Cont.)  
Designation  
Function  
Values  
Configuration Guidelines  
MAP MODE  
Determines the selection  
method for the E1 sublink  
time slots transferred to the  
HDSL link.  
USER Free user selection of time slots  
To assign individual time slots, select USER.  
SEQ  
Sequential allocation of time slots, starting  
from a user-specified time slot (defined under  
START TS).  
To let HCD-E1 assign the time slots  
automatically in accordance with the  
NUM OF TS parameter, select SEQ  
(sequential allocation) or ALT (alternate  
allocation).  
Note:  
ALT  
Alternate allocation of time slots. This  
selection means that starting from a specified  
slot, defined under START TS, the time slot  
allocation looks like this:  
The selected sublink time slots  
are allocated the same time  
slots in the HDSL link frame.  
If you have selected SEQ or ALT, you must  
also set the starting time slot under  
START TS.  
DATA NC DATA NC DATA, etc.  
Default: USER  
NC, 0, 1, ..., 32  
1 to 32  
NUM OF TS  
START TS  
Selects the total number of  
time slots being assigned.  
for UNFRAMED  
for G732N  
When working in UNFRAMED mode, this  
parameter must be set to 32.  
In ALT mode, the number of time slots  
assigned depends on the value of START TS  
and is 16 at maximum.  
Default: NC  
When working in UNFRAMED mode, this  
parameter must be set to 0.  
Selects the starting time slot  
for SEQ or ALT time slot  
allocation  
Any number in the range of 01 to 31, consistent with  
the desired number of user time slots.  
If you selected SEQ mode for G732N, make  
sure that the sum of the START time slot  
number and of the NUM OF TS parameter  
does not exceed 31.  
Default: 0  
IDLE_CODE  
Selects the code transmitted to The available selections are 00 to FF (hexadecimal)  
fill idle (unused) time slots in  
the E1 frames  
Default: FF  
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Table 3-3 Sublink Configuration Parameters (Cont.)  
Designation  
Function  
Values  
Configuration Guidelines  
TS_0 to TS_31 (for  
UNFRAMED)  
TS_1 to TS_31 (for  
G732N)  
If you have selected USER  
under MAP, selects, for each  
HDSL time slot, whether to  
use it for carrying the user's  
payload or not. If you have  
selected SEQ or ALT, displays  
the time slot allocation.  
NC  
Time slot not used (not connected)  
Time slot used to carry payload data  
For each time slot to be used, select DATA  
to assign the time slot to carry user's payload,  
or NC to skip it. Make sure you assign the  
exact number of time slots needed to  
support the data rate selected by means of  
the NUM OF TS parameter. Avoid selecting  
time slots, which have already been assigned  
to data channels or in-band management  
DATA  
Default: NC  
Table 3-4 Control Port Parameters  
Designation  
Function  
Values  
Configuration Guidelines  
SPEED  
Selects control  
port data rate  
300, 1200 ,2400, 4800, 9600 (bps), AUTO  
To enable the supervisory port to use the  
SLIP protocol (for example, for SNMP or  
Telnet management), select the specific  
data rate being used. In all the other cases,  
select AUTO.  
AUTO Autobaud operation. HCD-E1 automatically identifies the  
control port data rate.  
Default: AUTO  
In this case HCD-E1 performs the  
automatic baud rate recognition  
procedure. To ensure positive  
identification of terminal data rate, start  
the communication with three consecutive  
carriage returns (<CR>).  
DATA  
Selects the  
7 or 8 data bits.  
Make sure that the number of data bits is  
the same as on the terminal.  
number of data  
bits in the word  
format  
Default: 8  
3-12  
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Table 3-4 Control Port Parameters (Cont.)  
Designation  
Function  
Values  
Configuration Guidelines  
PARITY  
Selects the  
method of parity  
checking  
ODD Odd parity  
Make sure that the parity is the same as on the  
terminal.  
EVEN Even parity  
NONE Parity check disabled (available only with 8 data bits)  
Default: NONE  
INTERFACE  
Selects control  
port interface  
DCE  
DTE  
HCD-E1 operates as a DCE for the control terminal.  
Select DCE when directly connected to the  
control terminal.  
HCD-E1 operates as a DTE, for connection via modem  
to the control terminal.  
Select DTE when connected to a modem.  
Default: DCE  
Note: The INTERFACE parameter changes only the direction of the interface control (handshaking) signals, but not the functions of the  
interface pins. Therefore, when connecting to a modem, it is necessary to use a cross cable.  
TERMINAL Management by means of a supervision terminal.  
AUX DEV (does Selects the  
not appear  
with HCD-E1  
configured as  
remote)  
management  
mode supported  
by the HCD-E1  
control port  
NMS-SLIP  
Management by means of Telnet host or an  
SNMP network management station.  
NONE  
Not in use  
Default: TERMINAL  
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Table 3-5 Channel Parameters  
Designation Function  
Values  
Configuration Guidelines  
FRAME  
Selects a framed or  
unframed mode of HDSL  
framer  
FRAMED  
HDSL framer is in the  
framed mode  
Select UNFRAMED if your remote unit is HTU-E1 and desired  
payload data rate is 2048 kbps.  
UNFRAMED Allows transfer of  
unframed 2048 kbps  
data streams  
Note: Any change in the operating mode from FRAMED to  
UNFRAMED and vice versa will cause double temporary HDSL  
synchronization loss.  
Default:  
Important: If you select UNFRAMED, the payload data rate must be 1792 kbps or 2048 kbps. Priority bumping is not applicable in this mode.  
FRAMED  
MULT  
MAP  
Selects the basic data rate  
per HDSL timeslot  
64K Basic data rate is 64 kbps  
56K Basic data rate is 56 kbps  
Default: 64  
Select the basic rate of the user's payload, 56 kbps or 64 kbps, in  
accordance with the desired user's channel data rate.  
The recommended selection is 64 kbps. When you select 56 kbps,  
HCD-E1 packs the user's data in bytes by adding an "1" bit for  
each seven user bits, therefore actually the line data rate is always  
a multiple of 64 kbps.  
Selects the time slot  
USER Free user selection of time slots.  
To assign individual time slots, select USER.  
allocation method used for  
mapping user's data into the  
time slots of the HDSL link  
SEQ  
Sequential allocation of time slots,  
starting from a user-specified slot,  
defined under START TS.  
To let HCD-E1 assign the time slots automatically in accordance  
with the SPEED parameter, select SEQ (sequential allocation) or  
ALT (alternate allocation).  
ALT  
Alternate allocation of time slots,  
starting from a user-specified time  
slot, defined under START TS.  
ALT means that starting from a specified slot, defined under  
START TS, the slot allocation looks like this:  
DATA NC DATA NC DATA etc.  
Default: USER  
SPEED  
Selects the channel payload Available data rates are multiples of the basic The maximum possible speed selected for the ALT mode depends  
data rate. For a channel with rate (56 kbps or 64 kbps). The multiples are  
Ethernet interface, selects in the range of 1 to 32, resulting in rates of  
the transfer rate through the 56, 112, 168, ..., 1792 kbps or 64, 128, 192,  
on the START parameter and cannot exceed the multiple of MULT  
and 16.  
HDSL link  
..., 2048 kbps, respectively.  
Default: NC  
3-14  
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Table 3-5 Channel Parameters (Cont.)  
Designation  
Function  
Values  
Configuration Guidelines  
START TS  
Selects the starting time slot Any number in the range of 0 to 31, consistent If you have selected SEQ, make sure that the sum of START  
for SEQ or ALT time slot  
allocation (not displayed for  
USER allocation)  
with the desired number of user time slots.  
time slot number and of SPEED divided by MULT does not  
exceed 31.  
Default: 0  
CTS  
Selects the state of the CTS ON  
line in the data channel  
CTS continuously on  
For polled applications, select =RTS.  
=RTS  
CTS line follows the RTS line  
interface (not relevant for  
the Ethernet interface)  
Default: ON  
ETHER (appears  
only when data  
channel has  
Selects the Ethernet LAN  
traffic transfer mode  
HALF_DUP Half duplex operation  
FULL_DUP Full duplex operation  
Default: HALF_DUP  
Ethernet interface)  
BRIDGING  
Reserved for future use.  
Always displays FILTER, independently of the  
selected Ethernet traffic control function.  
To select the Ethernet traffic control function, use Ethernet  
bridge DIP switch SW-1, Section 3 (see Appendix C). Set the  
DIP switch, Section 3 to ON (FILTER) if you want to filter the  
traffic sent to the remote end (recommended).  
(appears only  
when data channel  
has Ethernet  
interface)  
FIFO SIZE  
Selects the size of the FIFO AUTO  
buffer for the data channel.  
Automatic size selection.  
Select AUTO (automatic FIFO buffer size selection), which  
means that the FIFO buffer size is automatically selected, in  
accordance with the jitter that must be tolerated at each data  
rate.  
32, 60, 104,144 Buffer size in bits corresponds  
to FIFO lengths of 16, 30,  
This parameter is used in  
the DTE2 mode. In the  
other modes, HCD-E1 sets  
the buffer size  
52, and 72 bits).  
When using the DCE and DTE1 clock modes, it is not  
necessary to increase the FIFO buffer size. If the DTE2 mode  
is used, and the jitter expected in a specific application is  
higher than what can be tolerated when using the  
automatically selected size, you can manually select a FIFO  
buffer size greater than the AUTO size. The AUTO values are  
listed in Table 1-1.  
Default:  
AUTO  
automatically.  
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Configuration Parameters 3-15  
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Table 3-5 Channel Parameters (Cont.)  
Designation  
Function  
Values  
Configuration Guidelines  
CLK MODE  
Selects the clocking mode of  
the given data channel.  
DCE  
The data channel provides both  
transmit and receive clocks to the  
user DTE.  
Select in accordance with the type of equipment connected to  
the user data channel (see Chapter 1 for more information):  
DCE - For direct connection to a synchronous DTE  
DTE1 The data channel provides the  
receive clock to the user while  
receiving the transmit clock from the  
DTE.  
DTE1 - For connection via a modem with external clock, or  
another equipment that accepts a receive clock and outputs  
a transmit clock.  
DTE2 The data channel receives both the  
transmit and receive clocks from the  
user DCE.  
DTE2 - For connection via a modem or other type of  
equipment (such as a multiplexer), that provides both  
receive and transmit clocks. You must select this mode  
when the HCD-E1 timing is to be locked to an external  
clock (see CLK MASTER), or the external clock is intended for  
use as a fallback reference (see CLK_FBACK).  
Default: DCE  
TS_0 to TS_31  
If you have selected USER  
under MAP, selects, for  
each HDSL time slot,  
NC  
Time slot not used (not connected) For each time slot to be used, select DATA to assign the time  
slot to carry user's payload, or NC to skip it. Make sure you  
assign the exact number of time slots needed to support the  
data rate selected by means of the SPEED parameter.  
DATA  
Time slot used to carry payload  
data  
whether to use it for  
Default: NC  
carrying the user's payload  
or not. If you have selected  
SEQ or ALT, displays the  
time slot allocation.  
Avoid selecting time slots, which have already been assigned to  
another channel, sublink, or in-band management.  
3-16  
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Table 3-6 BERT Parameters  
Designation Function  
Values  
Configuration Guidelines  
PATTERN  
Selects the test pattern.  
2E3-1, 2E4-1, 2E5-1, 2E6-1, 2E7-1, 511, 2E10-1, 2047,  
2E15-1, 2E17-1, 2E18-1, 2E20-1, QRSS, 2E21-1, 2E22-1,  
2E23-1, 2E25-1, 2E28-1, 2E29-1, 2E31-1, 2E32-1.  
Default: 2E3-1  
ERR RATE  
Enables the injection of a  
calibrated rate of errors in the  
transmitted test pattern.  
SINGLE  
Select NO ERR to disable the injection of  
errors  
10E-1, 10E-2, 10E-3, 10E-4, 10E-5, 10E-6, or 10E-7  
Select SINGLE to enable the injection of  
single errors  
NO ERR  
Default: NO ERR  
Select 10E-1 to enable the injection of errors  
at a rate of 10E-1 (one error in every 10 test  
pattern bits), and same with 10E-2, 10E-3,  
10E-4, 10E-5, 10E-6, up to 10E-7 (one error  
in every 10 million test pattern bits).  
See Operating BERT from the Front Panel in  
Section 5.4 for the error injection procedure.  
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Table 3-7 Download Parameters  
Designation Function  
Values  
Configuration Guidelines  
SL MODE  
Selects the in-band transmission NONE In-band SNMP and Telnet traffic is ignored  
Select NONE also when using UNFRAMED  
mode.  
mode for the sublink  
TS0/F In-band SNMP and Telnet traffic is received and  
transmitted in time slot 0.  
To use the Sa4 bit in time slot 0, select TS0/F  
DEDIC In-band SNMP and Telnet traffic is received and  
transmitted in a dedicated user-selected time slot.  
If you selected DEDIC, you must also select a  
free time slot using the SL TS NUM  
parameter.  
Default: NONE  
ML MODE  
Selects the in-band transmission NONE In-band SNMP and Telnet traffic is ignored  
Select NONE also when using UNFRAMED  
mode.  
mode for the selected main link.  
DEDIC In-band SNMP and Telnet traffic is received and  
transmitted in a dedicated user-selected time slot.  
If you selected DEDIC, you must also select a  
free time slot using the ML TS NUM  
parameter.  
Default: NONE  
SL TS NUM  
ML TS NUM  
Selects the free time slot when 1 to 31  
SL MODE is selected as DEDIC.  
If you have selected DEDIC both for SL and  
ML modes, make sure that the assigned time  
slot is the same for both links.  
Default: 31  
Selects the free time slot when 0 to 31  
ML MODE is selected as  
If you have selected DEDIC both for SL and  
ML modes, make sure that the assigned time  
slot is the same for both links.  
Default: 31  
DEDIC.  
Table 3-8 Priority Bumping Configuration Parameters  
Designation Function  
Values  
TS_1 to TS_31 Selects the time slot priority in the case one of LOW  
Low priority  
High priority  
the HDSL lines is down. The time slots which  
HIGH  
have been assigned high priority will continue  
Default: LOW  
being sent on the remaining HDSL line.  
1. The priority bumping will work in the framed mode only.  
2. TS-0 has always HIGH priority. The maximum number of other time slots that can be configured to high priority is 16.  
Note  
3-18  
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Chapter 3 - Front Panel Operating Instructions  
3.5 Operating Instructions  
This section covers the following activities:  
Turning HCD-E1 on  
Checking the HCD-E1 configuration  
Normal HCD-E1 operating indications  
Monitoring the HCD-E1 performance  
Turning HCD-E1 off  
Refer to Section 3.6 for local configuration setup instructions.  
To turn HCD-E1 on, set the rear POWER switch to ON (AC version) or  
connect it to the power supply (DC version). Upon turn-on, HCD-E1  
performs a self-test: observe the front-panel indications.  
Turning HCD-E1  
On  
During the self-test, HCD-E1 displays its current software revision:  
HCD REV 2.1  
SELF TEST  
After successfully completing the self-test procedure, HCD-E1 switches to  
the default ALARM BUFFER screen.  
If HCD-E1 fails the self-test, its LCD will display a description of the fault. In  
this case, HCD-E1 must be repaired before it can be used again.  
Access to the inside of the unit is permitted only to qualified and  
authorized personnel  
Warning  
If the self-test reveals that configuration data selected by the user and stored  
in the HCD-E1 database is corrupted, HCD-E1 generates the DB CHKSUM  
ERR alarm message. In this case, it is necessary to initialize the database. To  
do this, use the INIT DB command, if you have access to a control terminal.  
Otherwise, do the following:  
1. Set Section DB INIT of the internal switch S1 to ON.  
2. Turn HCD-E1 on for a short time (until the power-up self-test is  
performed) .  
3. Return the DB INIT switch section to OFF. Now HCD-E1 is operating  
with the default parameters. The parameter values included in the  
default configuration are listed in Section 3-4.  
4. Configure the unit, if necessary.  
Refer to Chapter 2 for more detailed procedures.  
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Operating Instructions  
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You can verify the HCD-E1 configuration as explained in the following  
section. If the configuration does not require modification, HCD-E1 is ready  
for operation immediately after the self-test is completed. For information  
how to change the configuration, refer to Section 3.6.  
Before performing the procedure below, review Section 3-4, which explains  
the HCD-E1 configuration parameters.  
Checking the  
Current Operating  
Configuration  
To check the current operation configuration, proceed as follows:  
During the following procedure, do not press the ENTER push button, to  
prevent accidental change of parameters.  
Note  
Step  
Action  
Key  
Result  
1
Bring the cursor to the top row (if it is  
not already there).  
CURSOR  
2
Scroll to display SYSTEM PARAMETER  
in the top row.  
SCROLL  
The second row shows the first system  
parameter (CLK MASTER if your HCD-E1 is  
configured as central) and its current  
selection.  
3
4
Bring the cursor to the left-hand field in CURSOR  
the second row.  
Scroll to see the other system  
parameters.  
SCROLL  
After each pressing of the SCROLL button,  
the second row displays the name and  
current value of the next system parameter.  
Continue until the first parameter appears  
again.  
5
6
Bring the cursor to the left-hand field in CURSOR  
the top row.  
Bring to display the next group of  
configuration parameters (the sublink  
parameters).  
SCROLL  
The first row displays SL PARAMETERS. The  
second row shows the first parameter of the  
port parameters, FRAME, and its current  
value.  
7
8
Bring the cursor to the left-hand field in CURSOR  
the second row.  
Scroll to see the other parameters of  
this group.  
SCROLL  
After each pressing of the SCROLL button,  
the second display row shows the current  
value of the next parameter. Continue until  
FRAME appears again.  
9
Repeat steps 5 to 8 to display the  
control port parameters, SP  
PARAMETERS and CHANNEL PRM  
CH1  
CURSOR  
SCROLL  
10  
Bring the cursor to the right-hand field  
in the top row.  
CURSOR  
SCROLL  
The first row displays CHANNEL PRM CH1.  
3-20  
Operating Instructions  
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Step  
Action  
Key  
Result  
11  
Bring the cursor to the right-hand field  
in the top row  
CURSOR  
12  
13  
Scroll to display CH2  
SCROLL  
The first row displays CHANNEL PRM CH2.  
Repeat steps 7, 8 to see other  
Channel 2 parameters.  
CURSOR,  
SCROLL  
14  
Repeat steps 5 to 8 to display the rest  
of the parameters: BERT PRM,  
DNLOAD PRM, PB PARAMETERS  
LCD  
Normal Indications  
If no ON-state alarm* is stored in the alarm buffer (ALM indicator off),  
HCD-E1 continues to display the last user-selected display. If there are  
ON-state alarm messages stored in the alarm buffer (ALM indicator lights)  
and neither PORT DIAG nor HDSL DIAG screen is displayed, the top row  
displays the message ALARM BUFFER.  
In addition, HCD-E1 will automatically abort the current activity (except  
PORT DIAG and HDSL DIAG) and will redisplay the ALARM BUFFER  
message if no front-panel button is pressed for one minute.  
When the top row shows ALARM BUFFER, the second row displays the  
following information:  
If there are no ON-state alarm messages stored in the alarm buffer, the  
second row shows EMPTY.  
If the alarm buffer contains ON-state alarms, HCD-E1 displays SCROLL in  
the left-hand field of the second row, and CLEAR in the right-hand field.  
* For explanation of the term, instructions on displaying and clearing the alarms, refer  
to Section 5.2, Status Indications and Alarms, in Chapter 5.  
LEDs  
During normal operation, all the HCD-E1 front-panel indicators are off.  
The TST indicator lights when a test is active. The test type can be  
displayed by entering the TEST OPTIONS (Chapter 5).  
The E1 LOS LOC indicator lights when the E1 port loses frame  
synchronization to the incoming signal (in the UNFRAMED mode, the  
indicator lights when the incoming signal is corrupted or missing).  
The E1 LOS REM indicator of a link lights when the equipment  
connected to the E1 port reports loss of synchronization. This indication  
is not available when the UNFRAMED mode is selected.  
The HDSL LOS indicator lights when the circuits of the corresponding  
HDSL line lose synchronization to the incoming signal.  
The ALM indicator lights when ON-state alarms are stored in the  
HCD-E1 alarm buffer.  
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Operating Instructions  
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HCD-E1 continuously measures diagnostics performance data. The  
diagnostics data is available under PORT DIAG or HDSL DIAG.  
Monitoring the  
HCD-E1  
Performance  
For the explanation of the measured parameters, refer to Section 5.3,  
Performance Diagnostics Data, in Chapter 5.  
To turn HCD-E1 off, do the following:  
Turning HCD-E1  
Off  
If you have an AC version, set the HCD-E1 rear power switch to OFF  
If you have a DC version, disconnect the power cord from the unit.  
3.6 Local Configuration Setup Procedure  
Before starting any configuration action:  
General  
Review the relevant configuration parameters given in Section 3-4.  
Consult a list of the required parameters from the network subscription  
data, and/or from your system administrator.  
To set up the HCD-E1 configuration, act in the following order:  
1. Select the system parameters (only if your unit is configured as central).  
2. Select the E1 sublink parameters.  
3. Select the channel parameters.  
4. Select the parameters of the control port, if needed.  
5. Select the priority bumping parameters, if needed and possible.  
6. Select the download parameters (if you want to enable in-band  
management).  
7. Select the BERT parameters, if necessary.  
If your HCD-E1 is configured as remote, you will have to configure it only  
when the CONFIG REM parameter (see Table 3-2, System Parameters) of  
your unit configured as central is set to NO.  
The general configuration procedure is explained on the following page.  
Tables in Section 3.4 list special considerations and guidelines for each  
group of parameters.  
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Local Configuration Setup Procedure  
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HCD-E1 has password protection designed to avoid undesirable  
Password  
Protection  
modification of its parameters. You will be able to configure HCD-E1 from  
the front panel only if its password protection is disabled. Otherwise, you  
can use the HCD-E1 front panel to display the current parameter values, but  
cannot modify them. If you try to modify a parameter or perform a test  
function from the front panel while the password protection is enabled,  
HCD-E1 will display CONFIG ERROR 04 (for the list of configuration error  
messages see Table 5-5 in Chapter 5).  
If you have access to an ASCII control terminal, you can use the DEF SP  
command to enable or disable the password protection (see Chapter 4 for  
detailed instructions).  
If the terminal is not available, you must set for a short time the DB INIT  
section of the internal switch S1 to ON for disabling password protection, as  
explained in Section 2-4.  
This action will delete all the current parameters on your HCD-E1 and make  
it use the default parameter values. If your unit is configured as central, these  
parameters will be also automatically downloaded to the remote unit. That is  
to say, now you will need to reconfigure both the central and the remote  
unit. The only case you would not have to do it is when your unit is  
configured as remote and you want its parameters to be automatically  
downloaded from the unit configured as central (its CONFIG REM parameter  
from SYSTEM PARAMETER menu set at YES).  
Note  
Before starting the configuration procedure, make sure that all the  
user-initiated loopbacks are disconnected. To disconnect the loopbacks,  
select OFF under the TEST OPTION field (see Section 5.4, Diagnostic Tests,  
in Chapter 5).  
General  
Configuration  
Procedure  
If your configuration attempt is invalid, HCD-E1 shortly displays a CONFIG  
ERROR XY message (the code XY identifying the error) and then returns to  
its normal display. For explanation of the configuration error messages refer  
to Section 5.5, Configuration Error Messages, in Chapter 5.  
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Local Configuration Setup Procedure  
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To configure the unit, follow the steps below:  
Step  
Action  
Key  
Result  
1
2
Bring the cursor to the top row (if not already there).  
CURSOR  
SCROLL  
Scroll to display the desired group of parameters in the top  
row.  
The second row shows  
the first parameter in the  
selected group and its  
current value.  
Note: When the desired group of parameters must be separately selected for each data channel, the  
top row includes an additional field (at the rightmost side of the top row): this field is used to select  
the desired channel number.  
3
Bring the cursor to the left-hand field (parameter name) in  
the second row, and then scroll to display the desired  
parameter in the selected group.  
CURSOR  
SCROLL  
4
5
6
Bring the cursor to the right-hand field (the parameter  
value) in the second row.  
CURSOR  
Scroll to set the required value for the displayed parameter. SCROLL  
The second row shows  
the available values.  
When the desired parameter value is displayed, confirm the ENTER  
new parameter value.  
The second row displays  
shortly CONFIG ENTER,  
then returns to the  
Note: For the CHANNEL PRM, SL PARAMETERS and  
DNLOAD PRM groups, you must press ENTER only after  
you have changed all the parameters (that required  
changes), otherwise HCD-E1 displays the CONFIG ERROR  
message. For more information, see Table 3-3 and  
Table 3-5.  
normal display.  
7
Repeat steps 3 to 6 until values are assigned to all the  
parameters in the group.  
SCROLL  
The second row displays  
the current selection.  
Note: You do not have to press ENTER each time you change a parameter within a group. However,  
once you have finished to modify parameters of a certain group (such as system, sublink, etc.), you  
must press ENTER to confirm the selection. If you change parameter values, but return the cursor to  
the top row and scroll to another group without pressing ENTER, the changes are discarded and  
HCD-E1 shortly displays the message CONFIG LOSS.  
8
9
Repeat steps 1 to 7 until values are assigned to all the  
parameters in the desired groups.  
CURSOR  
SCROLL  
ENTER  
After completing the configuration actions, you can use  
steps 1, 2 to return to the ALARM BUFFER screen.  
CURSOR  
SCROLL  
The top row displays:  
ALARM BUFFER.  
If ON-state alarm messages are stored in the alarm buffer  
and the current screen is not PORT DIAG or HDSL DIAG,  
the ALARM BUFFER screen will be automatically displayed  
if no push button is pressed for one minute.  
Pressing ENTER accepts your choice only if the cursor is in the right-hand field  
of the second row.  
Note  
3-24  
Local Configuration Setup Procedure  
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This section provides instructions for performing time slot configuration  
from the front panel.  
Working with  
Time Slots  
Reassigning All Time Slots between Data Channels/Sublink  
If you want to reassign all timeslots from one data channel/sublink to  
another data channel/sublink, you must close the data channel/sublink (free  
all timeslots assigned to it), and then assign the timeslots to another data  
channel/sublink.  
1. If the data channel/sublink, which you want to close serves as master or  
fallback clock source, you must select a different timing reference first.  
Perform the selection by scrolling to SYSTEM PARAMETERS in the top  
row and setting temporarily CLK MASTER to INT and CLK FBACK to  
NONE.  
2. Deactivate all loopback tests. For instructions on deactivating loopback  
tests from the front panel, refer to Diagnostic Tests in Chapter 5.  
3. To close a data channel, scroll to CHANNEL PRM CHX in the top row.  
Set the SPEED parameter to NC and press the ENTER button.  
4. To close the sublink, scroll to SL PARAMTERS in the top row. Set the  
NUM OF TS parameter to NC and press the ENTER button.  
5. To reassign the closed time slots to the sublink, scroll to SL PARAMTERS  
in the top row and assign the time slots to the sublink. Refer to  
Table 3-3 for instructions on assigning time slots to the sublink.  
6. To reassign the closed time slots to a data channel, scroll to CHANNEL  
PRM CHX in the top row and assign the time slots to the channel. Refer  
to Table 3-4 for instructions on assigning time slots to data channels.  
7. Select the new sources for the CLK MASTER and CLK FBACK  
parameters.  
You must assign at least one timeslot to the data channel or sublink, which  
you select as master or fallback clock source.  
Note  
Reconfiguring Individual Time Slots  
To reconfigure individual time slots, follow the steps below:  
1. Deactivate all loopback tests. For instructions on deactivating loopback  
tests from the front panel, refer to Diagnostic Tests in Chapter 5.  
2. To reassign time slots currently assigned to a data channel, scroll to  
CHANNEL PRM CHX in the top row. Set the SPEED parameter to the  
corresponding (lower) value. To reassign time slots currently assigned to  
the sublink, scroll to SL PARAMETERS in the top row. Set the NUM OF  
TS parameter to the corresponding (lower) value. Select USER under  
MAP MODE. For each time slot you want to reassign, scroll to the time  
slot in the bottom row and set it to NC. When the closing of the desired  
time slots is completed, press ENTER.  
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3. To reassign closed time slots to a data channel, scroll to CHANNEL  
PRM CHX in the top row. Set the SPEED parameter to the  
corresponding (higher) value. For each time slot you want to reassign,  
scroll to the time slot in the bottom row and set it to DATA. When the  
reassignment of the desired time slots is completed, press ENTER.  
4. To reassign closed time slots to the sublink, scroll to SL PARAMTERS in  
the top row. Set the NUM OF TS parameter to the corresponding  
(higher) value. For each time slot you want to reassign, scroll to the time  
slot in the bottom row and set it as desired. When the reassignment of  
the desired time slots is completed, press ENTER.  
Replacing a Time Slot Used for the In-band Management  
Before selecting a new time slot for the main link in-band management, you  
must close the current dedicated time slot.  
1. Scroll to DNLOAD PRM in the top row, scroll to ML TS NUM in the  
bottom row.  
2. Scroll to the current dedicated timeslot and close it by setting it to NC.  
Wait 20 seconds (40 seconds if H-RPT is installed in the HDSL link).  
Make sure that the time slot, which you intend to use for the in-band  
management is not assigned to a data channel or sublink.  
Note  
3. Assign the desired timeslot to the in-band management from the  
DNLOAD PRM menu.  
3-26  
Local Configuration Setup Procedure  
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Chapter 4  
Control from the  
Supervisory Port  
4.1 General  
This chapter provides detailed instructions for the management of HCD-E1  
by means of ASCII terminals and IP hosts using the Telnet protocol.  
The initial configuring of HCD-E1 is to be performed using a standard ASCII  
terminal connected to the HCD-E1 control port, CONTROL DCE. However,  
after performing the initial configuration, you can manage HCD-E1 using  
any of the following three options:  
Use the terminal as a supervision terminal, for performing all the  
management activities supported by the HCD-E1.  
Manage HCD-E1 from any IP host using the Telnet protocol. After  
establishing a Telnet session with HCD-E1, the Telnet protocol offers the  
same functionality as the supervision terminal, and in addition enables  
remote access over IP networks.  
Manage HCD-E1 by means of SNMP-based network management  
stations, e.g., the RADview network management station offered by RAD,  
using the SLIP protocol for communication.  
This chapter includes the following information:  
Description of supervision terminal hardware requirements,  
communication and handshaking - Section 4-2.  
Starting a management session by means of the supervision terminal -  
Section 4-3.  
Description of the set of commands and command syntax available for  
the supervision terminal - Section 4-4 and Section 4-5. The same  
command set is available to Telnet users.  
General operating instructions, including start-up, routine operations, and  
stopping of remote control - Section 4-6.  
The instructions appearing in this chapter assume that the supervision  
terminal operator is familiar with the HCD-E1 system and with its  
configuration parameters.  
For instructions regarding the use of the RADview network management  
station, refer to the RADview User's Reference Manual.  
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4.2 Hardware Requirements  
Any standard ASCII terminal (“dumb” terminal or personal computer  
emulating an ASCII terminal) equipped with a V.24/RS-232 communication  
interface can be used to control HCD-E1 operation. Make sure to initialize  
HCD-E1 for correct terminal operation as explained in Section 4-3,  
otherwise some of the commands may not work properly.  
Terminal  
Characteristics  
The software necessary to run the HCD-E1 control program is contained in  
the HCD-E1 system.  
Typically, the Telnet host is a PC with the appropriate suite of TCP/IP  
protocols, or a UNIX station.  
Telnet (IP) Host  
Characteristics  
The Telnet host can be directly connected to the managed HCD-E1 unit, or  
located at any site from which IP communication be established to the  
managed HCD-E1.  
HCD-E1 has a V.24/RS-232 asynchronous DCE port, designated CONTROL  
DCE and terminated in a 9-pin D-type female connector. The control port  
continuously monitors the incoming data stream and will immediately  
respond to any input string received through this port; moreover, when  
configured to support SLIP, messages in each of the supported protocols are  
automatically identified and processed.  
Control Port  
Interface  
Characteristics  
The supervision terminal can be connected either directly to the HCD-E1  
control port (the CONTROL DCE connector), or through a modem or any  
other type of full-duplex data link. The HCD-E1 control port interface type  
must be set in accordance with the connection method (see Section 3-6):  
DCE  
Intended for direct connection to terminals. Since terminals  
usually have DTE interfaces, in this case the connection to the  
port is made by means of a straight-through cable.  
DTE  
Intended for connection through a modem or data link. In this  
case, you need a cross cable (also called null modem cable) to  
connect to the CONTROL DCE connector.  
The HCD-E1 control port can be configured to communicate at rates of 300,  
1200, 2400, 4800, or 9600 bps. The word format consists of one stop bit  
and 7 or 8 data bits. Parity can be odd, even or disabled.  
HCD-E1 supports two types of modems:  
Dial-up Hayescompatible modems. HCD-E1 has call-in capability, that  
is, it can accept external calls.  
Multidrop modems, such as the RAD SRM-8 miniature multidrop  
modem.  
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For multidrop operation, each HCD-E1 can be assigned a node number in  
the range of 1 through 255. Assigning node number 0 to the HCD-E1 means  
that it will accept and answer any message: this is not permitted in  
multidrop operation. Node number 0 is however recommended for use  
with both point-to-point and dial-up modes.  
Each HCD-E1 can be assigned a logical name of up to eight characters. The  
logical name is sent in each transmission of alarm messages. The name helps  
the operator to identify the source of messages that are received by the  
supervision terminal.  
The relevant HCD-E1 configuration parameters are described in Section 3-5  
and Section 4-5. Instructions for configuring the HCD-E1 control port appear  
in Section 3-8.  
The control lines being used in each DCE and DTE modes and the direction  
of the control signals are detailed in the following chart.  
Control Port  
Handshaking  
Protocol  
Control Line  
Interface Type  
DCE  
Out  
DTE  
Not Used  
Out  
Out  
In  
CTS  
DCD  
DSR  
DTR  
RI  
Out  
Out  
In  
Not Used  
In  
In  
RTS  
In  
Data Terminal Ready (DTR)  
The terminal sets the DTR line ON (active) to gain control over HCD-E1 and  
start a configuration/monitoring session.  
When the DTR is ON, the front panel controls are disabled, and the LCD  
displays a message that notifies the operator that HCD-E1 is under remote  
management:  
When the management mode defined by means of the DEF SP  
command (or SP PARAMETERS on the front panel) is the supervision  
terminal (AUXILIARY DEVICE = TERMINAL), the LCD shows TERMINAL  
ON LINE.  
When the management mode is the Telnet or SNMP  
(AUXILIARY DEVICE = NMS-SLIP), the LCD shows NETWORK ON LINE  
and displays the IP address.  
When you end the terminal control connection, returning the control to the  
HCD-E1 front panel, the DTR line goes OFF (becomes inactive).  
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Request to Send (RTS)  
The RTS line is normally ON (active) when the supervision terminal is in  
session.  
When the RTS line is OFF (inactive), HCD-E1 interprets any data received  
from the terminal on the TD line as MARK.  
Clear to Send (CTS)  
The state of the CTS line is determined by the CTS parameter:  
ON  
The CTS line is always ON (active).  
The CTS line follows the RTS line.  
=RTS  
Data Carrier Detect (DCD)  
The state of the DCD line depends on the communication address (node  
number):  
When the node number is 0, the DCD line is always ON (active).  
When a non-zero node number is used, the DCD becomes ON (active)  
when data is detected on the RD line, provided HCD-E1 recognizes its  
own address in the data stream.  
To simulate DTE operation, the delay between these events can be set by  
the user (by means of the DCD_DEL parameter).  
Ring Indication (RI)  
The RI line is used only with dial-up modems (INT=DTE).  
The RI line is normally OFF (inactive), and switches to the ON (active) state  
when the modem attached to the HCD-E1 front-panel CONTROL DCE  
connector detects an incoming call (see also the DSR Line section).  
Data Set Ready (DSR)  
Usually, the DSR line is configured to track the DTR line. In this case, if  
the control port interface is DTE, the DSR line will be set to ON for five  
seconds when the RI line is ON while the DTR line is OFF.  
If the control port interface is DCE, the DSR line can also be configured  
to be continuously ON. However, if the DTR line switches to OFF, the  
DSR line will also switch to OFF for 5 seconds.  
In addition, HCD-E1 always sets DSR OFF (inactive) for 5 seconds when the  
EXIT command is executed, or the disconnect time-out expires.  
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When the AUTOBAUD function is enabled, HCD-E1 can identify the  
operating data rate of the terminal by analyzing the timing of three  
consecutive Carriage Return + Line Feed characters (generated by pressing  
three times the carriage return key). The detected data rate is then used for  
the current communication session.  
AUTOBAUD  
Function  
The automatic baud rate identification procedure is performed (or repeated)  
whenever three consecutive carriage returns are received after one of the  
following events occurs:  
The DTR line has been switched OFF.  
The EXIT command has been executed.  
The idle disconnect time-out expired because no data has been  
exchanged with the supervision terminal.  
In case one of these events occurred, HCD-E1 assumes that the current  
communication session has been terminated.  
Note that when SLIP communication is required, the AUTOBAUD function  
must be disabled.  
4.3 Starting a Supervision Terminal Management  
Session  
Configure the terminal for the communication parameters used by the  
HCD-E1 CONTROL DCE port, select the full-duplex mode, turn the terminal  
echo off, and disable any type of flow control. For the initial configuration  
session, it is recommended to use the default communication parameters:  
9600 bps, one start bit, eight data bits, no parity, one stop bit. Connect the  
terminal cable to the CONTROL DCE connector of the HCD-E1. Turn the  
control terminal on. You are now ready to start a management session.  
Control Terminal  
Configuration  
If HCD-E1 does not respond (there is no echo or response to any command  
entered at the terminal), this may be caused by one of the following:  
Preliminary  
Settings for  
Initial  
Configuration  
Session  
CONTROL DCE communication parameters are not identical to those of  
the terminal  
HCD-E1 is configured to use a non-zero node number  
You can cover both possibilities by setting the DB INIT switch to ON. This  
will enforce the default communication parameters and the default (0) node  
number, and disable the password protection in one action, and you will  
then be able to start the communication session. However, HCD-E1 allows a  
finer procedure, which lets you preserve your preset configuration. To do so,  
follow the procedure below. Remember that all the changes will take place  
only after you turn the HCD-E1 off for a short time, and then turn it back on.  
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1. If you don’t know the node number, go to step 2. If you know the node  
number, enter it followed by the command (see General Guidelines and  
Principles below). If there is still no response, go to step 3. If you see  
asterisks instead of the command you typed, this means that HCD-E1  
requires you to enter a password. Press <CR> and type in the node  
number followed by the password. If you don’t know the password, set  
the PASSWD section of switch S1 to ON, to enforce the default  
password ‘HCD’. This action enforces the default (0) node number, and  
you can enter the ‘HCD’ password without any node number prefix.  
Now, you will receive the HCD-E1 working prompt and be able to start  
the session.  
2. Set the PASSWD section of S1 to ON, to enforce the default (0) node  
number. Enter <CR>. If there is still no response, go to step 3. If the  
prompt you see is ‘PASSWORD’, enter ‘HCD’ to see the working  
prompt.  
3. Set the DEF SP section of S1 to ON. If there is still no response, return  
to step 1 or 2, depending on whether you know the node number.  
Note that this time password protection is disabled.  
After successfully starting the management session, use the command  
DEF TERM 'terminal_type'to select the terminal type, if needed.  
'terminal_type'stands for one of the following types: VT-52, VT-100,  
TV-920, FREEDOM-100, or FREEDOM-220. If your terminal requires control  
sequences differing from those used by the terminals listed above, type the  
command Fand enter your terminal control sequences.  
Initial  
Configuration  
If the current control codes are not compatible with your terminal and you  
cannot enter the desired codes, enter the INIT Fcommand to reset the  
codes to 0, and then use the Fcommand to modify the control codes  
starting from the known field values.  
This section provides instructions for performing time slot configuration  
from the supervisory terminal.  
Working with  
Time Slots  
Reassigning All Time Slots between Data Channels/Sublink  
If you want to reassign all timeslots from one data channel/sublink to  
another data channel/sublink, you must close the data channel/sublink (free  
all timeslots assigned to it), and then assign the time slots to another data  
channel/sublink.  
1. Check the current time slot allocation by entering the DSP TS  
command.  
2. If the data channel/sublink, which you want to close serves as master or  
fallback clock source, you must select a different timing reference first.  
Use the DEF SYS command to set temporarily the CLK MASTER to INT  
and CLK FBACK to NONE.  
3. Deactivate all loopback tests. To do this, use the CLR TST command.  
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4. To close a data channel, use the DEF CH X command and set the  
SPEED parameter to NC.  
5. To close the sublink, use the DEF SL command and set the  
NUM_OF_TS parameter to NC.  
6. To reassign the closed time slots to the sublink, use the DEF SL  
command and assign the time slots to the sublink.  
7. To reassign the closed time slots to a channel, use the DEF CH X  
command and assign the time slots to the channel.  
You must assign at least one timeslot to the data channel or sublink, which  
you select as master or fallback clock source.  
Note  
Reconfiguring Individual Time Slots  
To reconfigure individual time slots, follow the steps below:  
1. Deactivate all loopback tests. To do this, use the CLR TST command.  
2. To reassign time slots currently assigned to a data channel, use the  
DEF CH X command. To reassign time slots currently assigned to the  
sublink, use the DEF SL command. Set each time slot you want to  
reassign to NC.  
3. To assign closed time slots to a data channel, use the DEF CH X  
command. Set each time slot you want to assign to DATA.  
4. To assign closed time slots to the sublink, use the DEF SL command. Set  
each time slot you want to assign as desired.  
Replacing a Time Slot Used for In-band Management  
Before selecting a new time slot for the main link in-band management, you  
must close the current dedicated time slot.  
1. Close the time slot used for the in-band management with the DEF DL  
command.  
Wait 20 seconds (40 seconds if H-RPT is installed in the HDSL link).  
Make sure that the time slot, which you intend to use for the in-band  
management is not assigned to a data channel or sublink.  
Note  
2. Assign the desired time slot to the in-band management, using the DEF  
DL command.  
4.4 HCD-E1 Control Language  
This section presents the HCD-E1 control language syntax, its usage, and set  
of commands.  
Following are general guidelines you have to be familiar with when working  
with HCD-E1 commands:  
General  
Guidelines and  
Principles  
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Commands can be entered only when the HCD-E1 control port working  
prompt is displayed. The prompt is HCD>, and it always appears at the  
beginning of a new line. The cursor appears to the right of the prompt.  
Commands are case-insensitive, that is, you can type commands in either  
lowercase or uppercase letters.  
To correct typing errors, press the BACKSPACE key until the error is  
cleared, and then type the correct command.  
Use space as a separator between command fields and/or parameters.  
Commands must end with a carriage return <CR>.  
To cancel the current command, press CTRL-C. You will obtain the  
HCD-E1 prompt again.  
If AUTOBAUD is on, start any session by pressing the <CR> key three  
times in sequence. This will ensure identification of terminal data rate.  
At the start of a session, when password protection is on, the prompt  
HCD-E1 displays is PASSWORD. This means that HCD-E1 is waiting for  
the password before continuing. When you start entering the password,  
HCD-E1 responds to your input with asterisks. After the correct password  
is received, HCD-E1 sends the working prompt.  
After the working prompt is displayed, the user can enter the desired  
command. Full duplex communication with the terminal is necessary.  
When HCD-E1 uses a non-zero node number, prefix any command  
with: NODE<SP>'node number'<SP>, where 'node number' is the  
three-digit node number. No response will occur until the node number  
is received and acknowledged by the addressed HCD-E1.  
Acknowledgment is indicated by the echoing of the node number part,  
i.e. Node<SP>nnn<SP>, where <SP> stands for space.  
At the start of a session, when password protection is on, you must  
enter the password after the node number. After the correct password  
is received, HCD-E1 sends the working prompt.  
If password protection is off, this step is omitted and the working  
prompt appears after the node number conditions are fulfilled.  
The node number is in the range of 1 through 255 (0 indicates that the  
selective addressing function is disabled). To set or change the node  
number, use the DEF NODE command.  
Command evaluation starts only when you press the <CR> key after the  
last page of the data form.  
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In case a command is invalid, HCD-E1 does not execute it and displays  
the following:  
- ‘Bad command or parameter. Type 'h' for help’  
if the command syntax is wrong  
-
An appropriate error message (see Section 5.5 in Chapter 5) if the  
command is not valid in the current system configuration or values  
you are trying to set are wrong.  
The correct command must then be sent again.  
You can avoid the command execution by pressing CTRL-C. This will  
result in the display of the HCD-E1 prompt, and a new command can be  
entered. You can also use CTRL-C to stop the automatic repetition of  
commands (/R option).  
Use CTRL-A to browse among the last ten commands.  
Use CTRL-D to repeat the last command.  
If an idle disconnect time-out is specified, HCD-E1 automatically  
disconnects the ongoing session if no command is received from the  
terminal for the specified time-out interval.  
The following general types of options are available with some commands  
(see details in the command set index, Table 4-1).  
Command  
Options  
Option  
Meaning  
Example of Usage  
/A  
All  
CLR ALM /A  
Clears all the alarms stored in the alarm buffer  
/C  
Clear  
DSP ALM /C  
Displays all the alarms stored in the alarm  
buffer, and then clears all the ON-type  
alarms* stored in the alarm buffer  
/CA  
/R  
Clear all  
DSP ALM /CA  
Displays all the alarms stored in the alarm  
buffer, and then clears all the alarms stored in  
the alarm buffer  
Repeat automatically DSP ST LINE /R  
command execution  
(available only when  
node number is 0)  
Enables you to monitor the status of line 1  
*
For explanation of the term see Section 5.2, Status Indications and Alarms, in  
Chapter 5.  
Table 4-1 lists the HCD-E1 commands in alphabetical order.  
Index of  
Commands  
Table 4-1 HCD-E1 Command Set Index  
Command  
CLR ALM  
Purpose  
Options  
Clear the alarms stored in the HCD-E1 alarm buffer  
Clear the alarms stored in the remote unit alarm buffer  
/A  
/A  
CLR ALM REM  
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Table 4-1 HCD-E1 Command Set Index (Cont.)  
Command  
Purpose  
Options  
CLR ALM HRPT  
Clear the ON-type alarms stored in the H-RPT alarm buffer  
/A  
CLR LOOP BERT CH X, or Deactivate the BERT test on data channel X of the remote unit  
CLR LP BERT CH X*  
CLR LOOP INBAND CH X, Deactivate the in-band loopback on data channel X of HCD-E1  
or CLR LP INBAND CH X*  
CLR LOOP L HRPT, or  
CLR LP L HRPT  
Deactivate a local loop on H-RPT (only for HCD-E1 configured as  
central)  
CLR LOOP L LINE, or  
CLR LP L LINE  
Deactivate a local (L) loopback on the HDSL lines  
CLR LOOP L CH X, or  
CLR LP L CH X*  
Deactivate the local (L) loopback on data channel X of local HCD-E1  
CLR LOOP R CH X, or  
CLR LP R CH X*  
Deactivate the remote (R) loopback on data channel X of local  
HCD-E1  
CLR LOOP R R CH X, or  
CLR LP R R CH X*  
Deactivate the remote (R) loopback on data channel X of the remote  
unit  
CLR LOOP L SL, or  
CLR LP L SL  
Deactivate a local (L) loopback on the E1 sublink of the local HCD-E1  
CLR LOOP R SL, or  
CLR LP R SL  
Deactivate the remote (R) loopback on the E1 sublink of the local  
HCD-E1  
CLR LOOP R R SL, or  
CLR LP R R SL  
Deactivate a remote (R) loopback on the E1 sublink of the remote  
unit  
CLR TST  
DATE  
Clear all the user-initiated tests and loopbacks  
Set the internal date for HCD-E1  
DEF AGENT  
Define the parameters of the internal SNMP agent of HCD-E1  
DEF BERT CH 1  
DEF BERT CH 2  
Define the type of test sequence, set the error injection rate to be  
used for BER testing on the corresponding channel, and control the  
receipt of the activation pattern for the in-band loopback initiation.  
DEF CH 1  
DEF CH 2  
Configure the parameters of the corresponding channel  
DEF DL  
Define the E1 sublink and main link in-band management  
parameters  
DEF NAME  
DEF NODE  
DEF PB  
Define the logical name of HCD-E1  
Define the node number of HCD-E1  
Define the time slot mapping of priority bumping  
Define a password  
DEF PWD  
DEF SL  
Define E1 sublink parameters  
DEF SP  
Define control port parameters  
Define system parameters  
DEF SYS  
DEF TERM  
Reset the terminal control codes to 0  
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Table 4-1 HCD-E1 Command Set Index (Cont.)  
Command  
DEF PWD  
DEF SL  
Purpose  
Options  
Define a password  
Define E1 sublink parameters  
Define control port parameters  
Define system parameters  
DEF SP  
DEF SYS  
DEF TERM  
Reset the terminal control codes to 0  
Select the control codes for one of the standard terminal types  
DEF TERM VT100  
DEF TERM TV920  
DEF TERM VT52  
DEF TERM FREEDOM100  
DEF TERM FREEDOM220  
DSP ALM  
Display the contents of the local unit alarm buffer, and optionally  
clear the buffer  
/C  
/CA  
DSP ALM HRPT  
DSP ALM REM  
Display the contents of the H-RPT alarm buffer, and optionally clear  
the buffer  
/C  
/CA  
Display the contents of the remote unit alarm buffer, and optionally  
clear the buffer  
/C  
/CA  
DSP BERT CH1  
DSP BERT CH2  
Display the results of the last BER measurement made on the  
corresponding channel  
/R /C /I /S  
DSP HDR TST  
Display hardware faults detected during the power-on self-test and  
during normal operation  
DSP HDSL PM LPX  
Display the contents of the performance monitoring registers of a  
selected HDSL line (X stands for the line number, 1 or 2) of the local  
HCD-E1, and optionally clear these registers  
/CA  
DSP PB  
Display time slot mapping of priority bumping  
DSP REM AGENT  
Display information on the remote SNMP agents handled by the  
HCD-E1 IP router  
DSP R HDR TST  
Display hardware faults detected at the remote unit (during the  
power-on self-test and during normal operation)  
DSP R HDSL PM LPX  
Display the contents of the performance monitoring registers of the  
remote unit for a selected HDSL line (X stands for the HDSL line  
number, 1 or 2), and optionally clear these registers  
/CA  
DSP R SL PM  
DSP SL PM  
Display the contents of the sublink performance monitoring registers  
of the remote unit and optionally clear the registers  
/C  
/CA  
Display the contents of the sublink performance monitoring registers  
of the local unit, and optionally clear these registers  
/C  
/CA  
DSP ST CH1  
DSP ST CH2  
Display status information on the corresponding channel  
DSP ST LINE X  
Display status information on the HDSL lines (X stands for the HDSL  
line number, 1 or 2), optionally repeat automatically  
/R  
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Table 4-1 HCD-E1 Command Set Index (Cont.)  
Command  
Purpose  
Options  
DSP ST SL  
Display status information on the E1 sublink, and the contents of the  
sublink BPV counters (when CRC-4 function is off), and optionally  
clear these counters or repeat automatically  
/R  
/C  
DSP ST SYS  
Display system status information (node name and number, software  
and hardware versions, clock source, central/remote mode, type of  
remote unit, types of data channel interfaces). Also displays the  
presence of H-RPT on the HDSL link and its software and hardware  
versions.  
DSP TS  
EXIT  
F
Display the allocation of the time slots of the HDSL signal  
End the current control session  
Select the codes for the “clear the screen”, “cursor right”, and “cursor  
home” commands sent to the supervision terminal  
H
Display a concise index of commands and option switches  
INIT DB  
Reload the database with the default parameters instead of the  
user-configured parameters. Table 4-2 lists default parameter values  
INIT F  
Reset the codes for “clear the screen”, “cursor right”, and “cursor  
home” to 0  
LOOP BERT CH X, or  
LP BERT CH X*  
Activate the BER test on data channel X of the remote unit  
LOOP INBAND CH X, or Activate the in-band loopback on data channel X of the remote unit  
LP INBAND CH X*  
LOOP L HRPT, or  
LP L HRPT  
Activate a local loop on H-RPT (only for HCD-E1 configured as central)  
LOOP L LINE, or  
LP L LINE  
Activate a local (L) loopback on the HDSL line  
LOOP L CH X, or  
LP L CH X*  
Activate the local (L) loopback on data channel X of local HCD-E1  
Activate the remote (R) loopback on data channel X of local HCD-E1  
LOOP R CH X, or  
LP R CH X*  
LOOP R R CH X, or  
LP R R CH X*  
Activate the remote (R) loopback on data channel X of remote  
HCD-E1  
LOOP L SL, or  
LP L SL  
Activate a local (L) loopback on the E1 sublink of the local HCD-E1  
LOOP R SL, or  
LP R SL  
Activate the remote (R) loopback on the E1 sublink of the local  
HCD-E1  
LOOP R R SL, or  
LP R R SL  
Activate a remote (R) loopback on the E1 sublink of the remote  
HCD-E1  
RESET  
TIME  
Reset the HCD-E1 system  
Set the internal time of HCD-E1  
*CH X stands for CH 1 (data channel 1) or CH 2 (data channel 2); X stands  
for 1 or 2.  
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4.5 HCD-E1 Command Set Description  
This section describes the HCD-E1 commands. The commands are listed in  
alphabetical order. The description includes command format, use, and  
options.  
The following notational conventions are used below:  
[ ]  
Square brackets indicate optional entry/parameter  
' '  
Single quotes delimit user entry  
<CR>  
LPX  
X
Indicates the pressing of the carriage return (Enter) key  
Identifies the HDSL line (LP1 for line 1, LP2 for line 2)  
Identifies the HDSL line (1 for line 1, 2 for line 2)  
or the channel (1 for channel 1, 2 for channel 2)  
Purpose  
CLR ALM  
Clear the alarm buffer.  
Syntax  
CLR ALM [/A]  
Use  
To clear only alarms of the ON type stored in the alarm buffer  
(see Table 5-1), type:  
CLR ALM<CR>  
CLR ALM command does not remove ON-type alarms from the alarm buffer,  
it just turns them off. The ALM LED on the front panel still remains lit, and  
you are able to see these alarms on the LCD and on the terminal.  
Note  
To clear all the alarm messages stored in the alarm buffer (including the  
history of ON/OFF-type alarms) and remove them from the alarm buffer,  
type:  
CLR ALM/A<CR>  
HCD-E1 performs the command and displays the date and time, followed  
by the HCD-E1 prompt. If the /A option was used and no alarm condition is  
present at the moment, the ALM LED goes off.  
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Purpose  
CLR ALM REM  
Clear the remote unit alarm buffer.  
Syntax  
CLR ALM REM [/A]  
Use  
To clear only alarms of the ON type stored in the alarm buffer of the  
remote unit (see Table 5-1), type:  
CLR ALM REM<CR>  
CLR ALM command does not remove ON-type alarms from the alarm buffer,  
it just turns them off. The ALM LED on the front panel still remains lit, and  
you are able to see these alarms on the LCD and on the terminal.  
Note  
To clear all the alarms stored in the alarm buffer of the remote unit  
(including the history of ON/OFF-type alarms) and remove them from the  
alarm buffer, type:  
CLR ALM REM/A<CR>  
HCD-E1 performs the command and displays the date and time , followed  
by the HCD-E1 prompt. If the /A option was used and no alarm condition is  
present at the moment, the ALM LED goes off.  
Purpose  
CLR ALM HRPT  
Clear the H-RPT alarm buffer.  
Syntax  
CLR ALM HRPT [/A]  
Use  
To clear only alarms of the ON type (see Table 5-2) stored in the alarm  
buffer of the H-RPT repeater, type:  
CLR ALM HRPT<CR>  
CLR ALM command does not remove ON-type alarms from the alarm buffer,  
it just turns them off. The ALM LED on the front panel still remains lit, and  
you are able to see these alarms on the LCD and on the terminal.  
Note  
To clear all the alarms stored in the alarm buffer of the H-RPT repeater  
(including the history of ON/OFF-type alarms) and remove them from the  
alarm buffer, type:  
CLR ALM HRPT/A<CR>  
HCD-E1 performs the command and displays the date and time , followed  
by the HCD-E1 prompt.  
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Purpose  
CLR LOOP  
Deactivate the specified user-initiated loopback or test.  
Syntax  
CLR LOOP [loop type], or CLR LP [loop type]  
Use  
To deactivate a local (L) loopback on the HDSL lines, type:  
CLR LOOP L LINE<CR> or CLR LP L LINE<CR>*  
To deactivate a local (L) loopback on the E1 sublink of the local HCD-E1,  
type:  
CLR LOOP L SL<CR> or CLR LP L SL<CR>  
To deactivate the remote (R) loopback on the E1 sublink of the local  
HCD-E1, type:  
CLR LOOP R SL<CR> or CLR LP R SL<CR>  
To deactivate a remote (R) loopback on the E1 sublink of the remote  
unit, type:  
CLR LOOP R R SL<CR> or CLR LP R R SL<CR>  
To deactivate the local (L) loopback on data channel X of local HCD-E1,  
type:  
CLR LOOP L CH X<CR> or CLR LP L CH X<CR>  
To deactivate the remote (R) loopback on data channel X of local  
HCD-E1, type:  
CLR LOOP R CH X<CR> or CLR LP R CH X<CR>  
To deactivate the remote (R) loopback on data channel X of remote  
HCD-E1, type:  
CLR LOOP R R CH X<CR> or CLR LP R R CH X<CR>  
To deactivate the BERT test on data channel X of HCD-E1, type:  
CLR LOOP BERT CH X<CR> or CLR LP BERT CH X<CR>  
To deactivate the in-band loopback on data channel X of the remote  
unit, type:  
CLR LOOP INBAND CH X<CR> or CLR LP INBAND CH X<CR>  
To deactivate a local loopback on the H-RPT, type:  
CLR LOOP L HRPT<CR> or CLR LP L HRPT<CR>*  
* These commands are available only from the unit configured as central.  
HCD-E1 performs the command and displays the date and time, followed  
by the HCD-E1 prompt. The TST LED goes off, if there are no more tests  
activated.  
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Purpose  
CLR TST  
Deactivate all the user-initiated tests and loopbacks being activated from this  
unit.  
Syntax  
CLR TST  
Use  
To deactivate all the user-initiated tests and loopbacks, type:  
CLR TST<CR>  
HCD-E1 performs the command and displays the date and time , followed  
by the HCD-E1 prompt. The TST LED goes off.  
If no test or loopback is currently activated, HCD-E1 displays ERROR 02 on  
the terminal.  
Note  
Purpose  
DATE  
Set the date for the HCD-E1 internal real-time clock.  
Syntax  
DATE  
Use  
1. Type:  
DATE<CR>  
HCD-E1 sends the entry line for the first parameter:  
DAY = 01  
2. If you do not want to change the current value of the parameter, press  
<CR> to confirm it and continue to the next line, otherwise press F to  
increase or B to decrease the displayed values, and then press <CR>  
to confirm the selected value. HCD-E1 displays the entry line for the  
next parameter.  
3. Repeat the procedure in step 2 to set the month. HCD-E1 displays the  
entry line for the year.  
4. Type the four digits of the current year. HCD-E1 displays the entry line  
for the week day.  
5. Repeat the procedure in step 2 to set the week day, and then press  
<CR> to end.  
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A typical display, as seen after all the parameters are selected, is shown  
below:  
DAY  
= 01  
= 03  
MONTH  
YEAR [4 CHARS] = 1996  
WEEK DAY =FRI  
Below HCD-E1 displays the date and time (note that the date has changed),  
followed by the HCD-E1 prompt.  
Purpose  
DEF AGENT  
Display and modify the current SNMP agent parameters. Refer to  
Appendix A for additional explanations.  
To enable SNMP and Telnet management, it is necessary to define all the  
parameters.  
Syntax  
DEF AGENT  
Use  
1. To define the SNMP agent parameters, type:  
DEF AGENT<CR>  
You will see the entry line for the first parameter,  
TELNET_APATHY_TIME  
10 MIN  
2. If you do not want to change the current value of the parameter, press  
<CR> to confirm it and continue to the next line, otherwise type in the  
new value and then press <CR>. HCD-E1 displays the entry line for  
the next parameter.  
3. Repeat the procedure until all the parameters are defined, and then  
press <CR> to end.  
A typical display, as seen after all the parameters are selected, is shown  
below:  
IP ADDRESS IS:  
= 192.114.029.233  
= public  
READ COMMUNITY IS:  
WRITE COMMUNITY IS:  
TRAP COMMUNITY IS:  
= private  
= public  
After performing the command, HCD-E1 displays the date and time,  
followed by the HCD-E1 prompt.  
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Display Fields  
The agent parameters displayed on the data form, their range of values and  
description of how to change them are as follows:  
TELNET_APATHY_TIME  
Press the F or B keys to select the time, in minutes,  
after which a Telnet connection will be automatically  
terminated if no incoming activity is detected.  
The available values are 10MIN, 15MIN, and 20MIN.  
Default is 10MIN.  
IP ADDRESS  
Type in the IP address assigned to the HCD-E1 SNMP  
agent in the dotted-quad format (four three-digit  
numbers in the range of 000 through 255, separated by  
periods).  
READ COMMUNITY  
Type in the name of the SNMP community that has  
read-only authorization (the HCD-E1 SNMP agent will  
accept getRequest and getNextRequest commands only  
from management stations using that community). You  
may enter up to 32 alphanumeric characters.  
WRITE COMMUNITY  
TRAP COMMUNITY  
Type in the name of the SNMP community that has  
read-write authorization (the HCD-E1 SNMP agent will  
also accept setRequest commands from management  
stations using that community). You may enter up to 32  
alphanumeric characters.  
Type in the name of the SNMP community to which  
the HCD-E1 SNMP agent will send traps. You may  
enter up to 32 alphanumeric characters.  
For explanation of the terms see Appendix A.  
Note  
Purpose  
DEF BERT  
Define the BERT test conditions.  
Syntax  
DEF BERT CH X  
Use  
1. Type the following:  
To define the BER test parameters for channel 1:  
DEF BERT CH 1<CR>  
To define the BER test parameters for channel 2:  
DEF BERT CH 2<CR>  
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HCD-E1 displays the BERT parameters data form:  
PATTERN  
2E3-1  
ERROR_INJECTION_RATE RX_INBAND  
NO ERR DISABLE  
The functions of the fields are as follows:  
PATTERN  
Selects the test pattern. The available selections are the QRSS test pattern, and the following  
pseudo-random sequences: 2E3-1, 2E4-1, 2E5-1, 2E6-1, 2E7-1, 511, 2E10-1, 2047, 2E15-1,  
2E17-1, 2E18-1, 2E20-1, 2E21-1, 2E22-1, 2E23-1, 2E25-1, 2E28-1, 2E29-1, 2E31-1, 2E32-1.  
ERROR_  
INJECTION_  
RATE  
Enables the injection of a calibrated rate of errors in the transmitted test pattern.  
The available selections are: 10E-1, 10E-2, 10E-3, 10E-4, 10E-5, 10E-6, 10E-7, NO ERR, or  
SINGLE.  
Select NO ERR to disable the injection of errors  
Select SINGLE to enable the injection of single errors  
Select 10E-1 to enable the injection of errors at a rate of 10E-1 (one error in every 10  
test pattern bits), and same with 10E-2, 10E-3, 10E-4, 10E-5, 10E-6, up to 10E-7 (one  
error in every 10 million test pattern bits).  
See DSP BERT CH command below for the error injection procedure.  
RX_INBAND  
Controls the receipt of the in-band loopback activation pattern. The available selections are  
ENABLE and DISABLE.  
Select ENABLE to enable initiation of the in-band loopback upon receipt of the  
activation pattern.  
Select DISABLE to disable the in-band loopback activation pattern receipt.  
2. Move the cursor to the desired field using the spacebar, and change, if  
necessary, using the F or B keys. After making the desired selections,  
press <CR> to end. HCD-E1 displays the date and time, followed by  
the HCD-E1 prompt.  
Purpose  
DEF CH  
Define the data channel parameters of HCD-E1.  
Syntax  
DEF CH X  
Use  
1. Define the channel parameters as follows:  
To define channel 1 parameters, type:  
DEF CH 1<CR>  
To define channel 2 parameters, type:  
DEF CH 2<CR>  
HCD-E1 displays the first line of the channel parameters data form. A  
typical form is shown below:  
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FRAME_MODE MULTIPLIER MAP_TYPE SPEED  
START_TS CTS  
N/A ON  
FIFO_SIZE  
AUTO  
FRAMED  
64  
USER  
NC  
2. Change the desired parameters (using spacebar to move between them  
and pressing F or B to increase or decrease their value) and press<CR>  
to move to the next line. HCD-E1 displays the second line of the  
channel parameters data form. A typical form is shown below:  
CLOCK_MODE  
DCE  
ETHERNET_MODE BRIDGING  
N/A N/A  
If the FRAME_MODE field shows N/A, it means that the sublink or the other  
channel is in UNFRAMED mode and all the 32 HDSL timeslots are assigned to  
it.  
Note  
The following table lists the available user port configuration parameters and  
their functions. The table also lists the parameter values included in the  
default configuration of the channel. For configuration guidelines, refer to  
Table 3-5 in Chapter 3.  
Designation  
Function  
Values  
FRAME_MODE Selects a framed or unframed  
mode of HDSL framer  
FRAMED  
UNFRAMED  
HDSL framer is in the framed mode  
Allows transfer of unframed 2048 kbps  
data streams, if you have an E1 port at the  
far end of the HDSL link  
Default:  
FRAMED  
Note: It is recommended to select FRAMED unless your application does not explicitly need the unframed mode.  
MULTIPLIER  
Selects the basic data rate per  
HDSL timeslot  
64K  
56K  
Basic data rate is 64 kbps  
Basic data rate is 56 kbps  
Default: 64  
MAP_TYPE  
Selects the time slot allocation  
USER Free user selection of time slots  
method used for mapping user's SEQ  
data into the time slots of the  
HDSL signal  
Sequential allocation of time slots, starting  
from a user-specified slot (defined under  
START_TS).  
ALT  
Alternate allocation of time slots. This selection  
means that starting from a specified slot, the slot  
allocation, defined under START_TS, looks like  
this: DATA NC DATA NC DATA, etc.  
Default: USER  
SPEED  
Selects the channel payload  
data rate.  
Available data rates are multiples of the basic rate (56 or  
64 kbps). The multiples are in the range of 1 to 32,  
resulting in rates of 56, 112, ..., 1736 kbps or 64, 128, 192,  
..., 1984 kbps, respectively. When working in UNFRAMED  
mode, the data rate must be 1792 or 2048 kbps for basic  
rates 56 kbps or 64 kbps, respectively.  
Default:  
NC  
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Designation Function  
Values  
Any number in the range of 0 to 31, consistent with the  
desired number of user time slots. The sum of the  
START_TS and of the SPEED divided by MULTIPLIER must  
not exceed 32.  
START_TS  
Selects the starting time slot for SEQ  
or ALT time slot allocation  
Default: N/A  
ON  
=RTS CTS line follows the RTS line  
N/A Not applicable  
CTS continuously on  
CTS  
Selects the state of the CTS line in  
the data channel.  
For a channel with Ethernet  
interface, this field always shows  
N/A, and cannot be changed  
Default: ON  
FIFO_SIZE  
Selects the FIFO buffer size of the  
data channel. This parameter is  
used in the DTE2 mode. In the  
other modes, HCD-E1 sets the  
buffer size automatically. The  
AUTO values are listed in Table 1-1.  
AUTO  
Automatic size selection.  
32, 60, 104,144 Buffer size in bits (corresponds to  
FIFO lengths of 16, 30, 52, and  
72 bits).  
Default:  
AUTO  
CLOCK_  
MODE  
Selects the clocking mode of the  
given data channel.  
DCE  
The data channel provides both transmit and  
receive clocks to the DTE connected to it.  
DTE1 The data channel provides the receive clock to  
the DTE connected to it while receiving the  
transmit clock from it.  
DTE2 The data channel receives both the transmit and  
receive clocks from the DCE connected to it.  
Default: DCE  
ETHERNET_  
MODE  
Selects the Ethernet LAN traffic  
transfer mode. For a channel with  
HALF_DUP Half duplex operation  
FULL_DUP Full duplex operation  
serial data interface, this field always N/A  
shows N/A, and cannot be changed  
Not applicable  
Default: HALF_DUP  
BRIDGING  
Reserved for future use.  
For a channel with serial data interface, this field always  
shows N/A.  
To select the Ethernet traffic control  
function, use Ethernet bridge DIP  
switch SW-1, section 3 (see  
Appendix C).  
For a channel with Ethernet interface, this field must be  
always set to FILTER, independently of the selected  
Ethernet traffic control function.  
3. Change the desired parameters (if needed) and press<CR>. HCD-E1  
displays the first line of the time slot map of the channel currently being  
configured. A typical display is shown below:  
TS_0  
TS_1  
TS_2  
...  
TS_9  
NC  
DATA  
NC  
...  
NC  
If you have selected USER under MAP_TYPE, you will have to select the  
time slot manually. To do this, proceed as follows:  
4. Use the spacebar to move between time slots. For each time slot, select  
between DATA (time slot allocated to the channel) and NC (not  
connected) by pressing F or B.  
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5. After completing the first line, press <CR> to move to the next line.  
Repeat the procedure until all the time slots are defined. When done,  
press <CR> to finish. HCD-E1 displays the date and time, followed by  
the HCD-E1 prompt.  
Make sure that the basic rate (56 kbps or 64 kbps) multiplied by the number  
of time slots you selected is equal to your SPEED selection.  
Note  
Purpose  
DEF DL  
Define the in-band management communication parameters of HCD-E1.  
Syntax  
DEF DL  
Use  
1. Type:  
DEF DL<CR>  
HCD-E1 displays the first line of the channel parameters data form. A  
typical line is shown below:  
ML_DL_MODE ML_TS_NUM ML_DL_SPEED  
NONE  
N/A  
N/A  
The available selections are as follows:  
NONE HCD-E1 does not use the main link to carry in-band  
management traffic  
DEDIC  
HCD-E1 uses a user-selected time slot for in-band  
management traffic over the main link.  
2. Select the desired mode (and time slots under the ML_TS_NUM field in  
the case you selected the DEDIC mode) and press<CR>. HCD-E1  
displays the second line of the data form:  
SL_DL_MODE  
NONE  
SL_TS_NUM SL_DL_SPEED  
N/A N/A  
The available selections are as follows:  
NONE HCD-E1 does not use the sublink to carry in-band  
management traffic  
TS0/F  
HCD-E1 uses the Sa4 bit in time slot 0 for in-band  
management traffic over the sublink  
HCD-E1 uses a user-selected time slot for in-band  
management traffic over the sublink.  
DEDIC  
3. Select the desired mode and the time slot. HCD-E1 performs the  
command and displays the date and the time followed by the HCD-E1  
prompt.  
1. If you selected DEDIC in both ML_DL_MODE and SL_DL_MODE, make  
sure that the slots you’ve selected in the ML_TS_NUM and SL_TS_NUM  
fields are the same.  
Note  
2. Parameters ML_DL_SPEED and SL_DL_SPEED are always N/A.  
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Purpose  
DEF NAME  
Define the logical name (up to eight alphanumeric characters).  
Syntax  
DEF NAME  
Use  
1. To define the HCD-E1 logical name, type:  
DEF NAME<CR>  
HCD-E1 displays the logical name entry form:  
ENTER NODE NAME (MAX 8 CHARACTERS) =  
2. Type the desired name, and then press <CR>. HCD-E1 displays the  
following line:  
CURRENT NAME = 'name'  
(where 'name' is the logical name HCD-E1 is currently assigned), and  
then the date and time, followed by the HCD-E1 prompt.  
If you want to store a logical name in the database, make sure that the DB  
INIT section of the HCD-E1 internal switch S1 is set to OFF. Otherwise, the  
default name (blank) is enforced.  
Note  
Purpose  
DEF NODE  
Define the node number, or address, of HCD-E1. The allowed range is  
0 to 255.  
Syntax  
DEF NODE  
Use  
1. Type:  
DEF NODE<CR>  
HCD-E1 displays the node entry form:  
NODE (0 to 255) = 0  
2. Type the desired number in the range of 0 to 255, and then press  
<CR>. HCD-E1 performs the command and displays the date and time,  
followed by the HCD-E1 prompt.  
If you want to store the user-selected node number, make sure that the  
DB INIT section of the HCD-E1 internal switch S1 is set to OFF. To use the  
user-selected node number, set the PASSWD section of S1 to OFF.  
Otherwise, the default number (0) is enforced.  
Note  
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Purpose  
DEF PB  
Define each time slot priority (high or low). In case one of the HDSL lines is  
down, time slots with high priority will still continue to be sent on the  
remaining line.  
Syntax  
DEF PB  
Use  
1. Type:  
DEF PB<CR>  
2. HCD-E1 displays the first line of the time slot map of the priority  
bumping. A typical display is shown below:  
TS_1  
TS_2  
...  
...  
TS_31  
LOW  
HIGH  
...  
...  
LOW  
3. If you want to change the priorities, use the spacebar to move between  
time slots. For each desired time slot, select between HIGH and LOW  
by pressing F or B.  
4. After completing the first line, press <CR> to move to the next line.  
Repeat the procedure until all the desired time slots are defined. When  
done, press <CR> to finish. HCD-E1 displays the date and time  
followed by the HCD-E1 prompt.  
1. The priority bumping will work in the framed mode only.  
Note  
2. TS-0 has always HIGH priority. The maximum number of other time slots  
that can be configured to high priority is 16.  
Purpose  
DEF PWD  
Define a new user password for the HCD-E1 system. The password must  
have 4 to 8 characters.  
Syntax  
DEF PWD  
Use  
1. Type:  
DEF PWD<CR>  
The following password entry screen appears:  
NEW PASSWORD (4 to 8 CHARS) =  
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2. Type the required password. Carefully check that the specified  
password has been indeed typed in, and then press <CR>. HCD-E1  
displays the next line:  
CURRENT PASSWORD = 'password'  
where 'password' is the current password, and then the date and time,  
followed by the HCD-E1 prompt.  
If you want to store the user-selected password, make sure that the DB INIT  
section of the HCD-E1 internal switch S1 is set to OFF. To use the  
user-selected password, set the PASSWD section of S1 to OFF. Otherwise, the  
default password (HCD) is enforced.  
Note  
Purpose  
DEF SL  
Select the sublink parameters of the HCD-E1  
Syntax  
DEF SL  
Use  
1. To define the sublink parameters, type:  
DEF SL<CR>  
HCD-E1 displays the first line of the sublink parameters data form. For  
explanation of parameters and configuration guidelines, refer to  
Table 3-3 in Chapter 3. A typical display is shown below:  
FRAME  
G732N  
CRC-4  
NO  
SYNC  
MAP_TYPE START_TS NUM_OF_TS IDLE_TS_CODE  
USER N/A NC FF  
CCITT  
If the FRAME field shows N/A, it means that one of the channels is in  
UNFRAMED mode and all the 32 HDSL timeslots are assigned to it.  
Note  
2. Change the parameter values using the spacebar to move between the  
fields and pressing F or B to scroll among the available selections.  
3. After the desired parameter values are selected, press <CR>. HCD-E1  
displays the second line of the data form:  
TS_0  
NC  
TS_1  
NC  
TS_2  
DATA  
...  
...  
TS_9  
NC  
4. Use the spacebar to move between time slots. For each time slot, select  
between DATA (time slot allocated to the current channel) and NC (not  
connected) by pressing F or B.  
5. After completing the first line of time slots, press <CR> to move to the  
next line. Repeat the procedure until all the time slots are defined.  
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6. When done, press <CR> to finish. HCD-E1 displays the date and time  
followed by the HCD-E1 prompt.  
1. You will have to perform steps 3 and 4 only in the case you have selected  
USER in the MAP_TYPE field. Otherwise HCD-E1 selects the time slots  
automatically.  
Note  
2. If you have selected SEQ, make sure that the sum of START_TS and  
NUM_OF_TS does not exceed 32.  
3. If you have selected ALT, make sure that  
NUM_OF_TS*2 + START_TS 31.  
Purpose  
DEF SP  
Define the control port parameters. See Section 3-4 for parameters  
description and practical guidelines on their selection.  
Syntax  
DEF SP  
Use  
1. Type:  
DEF SP<CR>  
2. The first page of the control port parameters data form is displayed. A  
typical form is shown below. The form presents the current parameter  
values as defaults.  
SPEED DATA PARITY INTERFACE CTS  
DCD_DEL DSR  
AUTO NO DCE =RTS 0 MS  
8
ON  
3. Change the parameter values, using the spacebar to move between the  
fields and pressing F or B to scroll among the available selections.  
4. When done, press <CR> to display the next page of control port  
parameters. A typical form is shown below.  
POP_ALM  
NO  
PWD  
NO  
LOG_OFF  
NO  
AUXILIARY DEVICE  
TERMINAL  
5. Repeat the procedure given in step 3 above to select new parameter  
values.  
After the desired parameter values are selected, press <CR> to end.  
HCD-E1 displays the date and time, followed by the HCD-E1 prompt.  
Parameters Programmable from the Terminal  
In addition to the parameters listed in Section 3-4, the following parameters  
can be programmed from the terminal only.  
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PWD  
Password protection:  
YES  
NO  
Password protection is enabled.  
Password protection is disabled.  
LOG_OFF  
CTS  
Idle disconnect time:  
NO Automatic session disconnection disabled.  
10_MIN Automatic disconnection after ten minutes if HCD-E1 receives no input.  
Determines CTS state:  
ON  
The CTS line is always ON (active).  
The CTS line follows the RTS line.  
=RTS  
DCD_DEL  
POP_ALM  
With the HCD-E1 control port defined as DTE, indicates the delay (in msec) between DCD=ON  
and the sending of data.  
Values: 0, 10, 50, 100, 200, 300 msec.  
Controls the automatic display of alarms on the terminal:  
YES  
The terminal automatically displays the alarm status whenever an ON-type alarm  
appears or an ON/OFF-type alarm changes its state to ON (for the term definition, see  
Section 5.2 in Chapter 5). If no such event occurs, HCD-E1 displays the alarm status  
every 10 minutes.  
NO  
The automatic display feature is disabled.  
DSR  
Determines the DSR state:  
ON  
The DSR line is continuously ON. It will switch to OFF for five seconds after the DTR line  
is switched OFF.  
DTR  
The DSR line tracks the DTR line. When INTERFACE=DTE, the DSR line will switch to  
ON for five seconds when the RI line is ON while the DTR line is OFF.  
AUXILIARY  
DEVICE  
Selects the management mode supported by the HCD-E1 control port:  
TERMINAL  
NMS-SLIP  
NONE  
Management by means of a supervision terminal.  
Management by means of Telnet host or an SNMP network management station.  
Not in use  
In order for HCD-E1 to use the selected parameters, verify that Section 3 -  
DEF SP and Section 2 - DB INIT of Switch S1 (see “Setting the Internal  
Jumpers and Switches” in Chapter 2) is in the OFF state (factory setting).  
Otherwise, HCD-E1 will use the default parameters.  
Note  
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Purpose  
DEF SYS  
Assign values to system parameters.  
Syntax  
DEF SYS  
Use  
1. Type:  
DEF SYS<CR>  
HCD-E1 displays the system parameters data form, which presents the  
current parameter values as defaults. A typical form is shown below.  
CLK_MASTER  
INT  
CLK_FBACK  
NONE  
CONFIG_REM  
YES  
For description of the CLK_MASTER, CLK_FBACK and CONFIG_REM  
parameters, see Table 3-2 in Section 3-4.  
This command makes sense only for HCD-E1 configured as a central unit  
(LTU). HCD-E1 configured as remote will display N/A instead of parameter  
values.  
Note  
2. Bring the cursor to the first field and, if desired, change the parameter  
value by pressing F or B to scroll among the available selections.  
3. Using spacebar, move to the second parameter and perform the above  
procedure.  
4. After the desired value is selected, press <CR> to end. HCD-E1  
displays the date and time, followed by the HCD-E1 prompt.  
Purpose  
DEF TERM  
Define the control sequences to be sent to the supervision terminal to  
perform the following terminal control functions:  
Clear the screen.  
Move the cursor to the screen home position.  
Move the cursor to the right by one position.  
This command is similar to the F command (see below), except that it also  
enables you to specify a terminal type so that HCD-E1 will automatically  
configure itself for using the corresponding control sequences. The terminal  
types supported by this command are: VT-52, VT-100, TV-920,  
FREEDOM-100, FREEDOM-220, and terminals compatible with one of  
them.  
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The codes used by the supported terminals are listed in the following table:  
Function  
Terminal Type  
TV920  
VT52  
VT100  
Freedom100  
Freedom220  
1B5B324A  
1B5B4800  
1B5B0143  
Clear Screen 1B2A0000  
Cursor Home 1E000000  
N/A  
1B5B324A 1B2A0000  
1B480000 1B5B4800 1E000000  
1B430000 1B5B3143 0C000000  
Cursor Right  
0C000000  
Syntax  
DEF TERM ‘terminal’  
Use  
To configure HCD-E1 for using the control sequences corresponding to a  
supported terminal, type:  
DEF TERM 'terminal'<CR>  
where 'terminal' stands for one of the types listed in the table above.  
HCD-E1 performs the command and displays the date and the time  
followed by the HCD-E1 prompt.  
If you enter DEF TERM (without the terminal type), HCD-E1 will reset to 0 all  
the three codes.  
Note  
Purpose  
DSP ALM  
Display the contents of the local unit alarm buffer. This buffer can contain  
up to 100 alarms.  
Syntax  
DSP ALM[Option]  
Use  
To display the complete contents of the buffer, type:  
DSP ALM<CR>  
*To display the complete buffer contents and then clear the ON-type  
alarms, type:  
DSP ALM/C<CR>  
*To display the complete buffer and then clear all the stored alarms,  
type:  
DSP ALM/CA<CR>  
* See the description of CLR ALM command earlier in this chapter for  
explanation of what the “clear” action means.  
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Display Format  
The contents of the alarm buffer are displayed as a table with four columns:  
alarm number, alarm syntax (description), alarm state, and date & time of  
alarm occurrence. Each block of alarms received from HCD-E1 is preceded  
by a header. The header lists the assigned logical name and the node  
number of the HCD-E1 unit which sent the alarm block, and thus it serves  
as an easily-identified separator between alarms transmitted by different  
HCD-E1 units.  
In the end, HCD-E1 displays the date and time, followed by the HCD-E1  
prompt.  
Table 5-1 in Chapter 5 lists all the HCD-E1 alarm messages in alphabetical  
order and corrective actions that you can undertake to fix the problem.  
Purpose  
DSP ALM HRPT  
Display the contents of the alarm buffer of the H-RPT repeater located on  
the HDSL link. This buffer can contain up to 100 alarms.  
Syntax  
DSP ALM HRPT  
Use  
To display the complete contents of the H-RPT buffer, type:  
DSP ALM HRPT<CR>  
*To display the complete H-RPT buffer contents and then clear the  
ON-type alarms, type:  
DSP ALM HRPT/C<CR>  
*To display the complete H-RPT buffer contents and then clear all the  
stored alarms, type:  
DSP ALM HRPT/CA<CR>  
*See the description of CLR ALM command earlier in this chapter for  
explanation of what the “clear” action means.  
The format of the H-RPT alarm buffer display is similar to the format for the  
local alarm buffer, described in the DSP ALM section above.  
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Purpose  
DSP ALM REM  
Display the contents of the alarm buffer of the appliance located at the  
remote end of the HDSL link. This buffer can contain up to 100 alarms.  
Syntax  
DSP ALM REM[Option]  
Use  
To display the complete contents of the remote buffer, type:  
DSP ALM REM<CR>  
*To display the complete buffer contents and then clear the ON-type  
alarms, type:  
DSP ALM REM/C<CR>  
*To display the complete buffer and then clear all the stored alarms,  
type:  
DSP ALM REM/CA<CR>  
*See the description of CLR ALM command earlier in this chapter for  
explanation of what the “clear” action means.  
The format of the remote alarm buffer display is similar to the format for the  
local alarm buffer, described in the DSP ALM section above.  
Purpose  
DSP BERT CH  
Display the results of an on-going bit error ratio measurement on the desired  
channel.  
When monitoring the BER results, you may also start and stop error  
injection, and restart the error count by clearing the accumulated error  
results. Note that monitoring is not possible when using Telnet.  
The error injection rate is defined by means of the DEF BERT command (see  
earlier in this chapter).  
Syntax  
DSP BERT CH X  
Use  
To display the current results of a BER test on channel 1, type:  
DSP BERT CH 1<CR>  
To display the current results of a BER test on channel 2, type:  
DSP BERT CH 2<CR>  
These commands are valid only when the BERT test (LOOP BERT) is active on  
the specified channel, otherwise HCD-E1 displays ERROR 26.  
Note  
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To display the current results of a BER test and then reset the error count,  
type:  
DSP BERT CH 1 /C<CR>  
or  
DSP BERT CH 2 /C<CR>  
To monitor the results of a BERT test, type:  
DSP BERT CH 1 /R<CR>  
or  
DSP BERT CH 2 /R<CR>  
In this case, you will see the commands you can use while monitoring the  
BER test results, and the line of the BER results themselves.  
PRESS I FOR ERROR INJECT  
PRESS S FOR STOP ERROR INJECT  
PRESS C TO CLEAR ERROR BITS  
To inject errors, act as follows:  
1. To inject errors at the rate you have selected with the DEF BERT  
command, type I.  
2. To resume error injection, type S and then I. To clear error bits, type C.  
To stop the monitoring and obtain again the command prompt, press  
CTRL+C.  
If you are using Telnet, it is impossible to monitor the results. In this case,  
use the following commands (available from the supervisory port as well).  
To display the results and start the injection of errors, type:  
DSP BERT CH 1 /I<CR>  
or  
DSP BERT CH 2 /I<CR>  
To display the results and then stop the injection of errors, type:  
DSP BERT CH 1 /S<CR>  
or  
DSP BERT CH 2 /S<CR>  
To display the results and clear error bits, type:  
DSP BERT CH 1 /C<CR>  
or  
DSP BERT CH 2 /C<CR>  
Display Format  
The BER test results displayed on the screen are valid for the instant when  
the display command has been issued (or for the last time the counters have  
been cleared, whichever occurred last). When the /R option is used, the  
results are periodically updated.  
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The results are presented in the following format:  
ERROR_BITS  
RUN_  
TIME  
ERRORS  
(SEC)  
SYNC_  
LOSS  
ERROR_INJECT  
OFF  
(SEC)  
(SEC)  
0
100  
0
0
The display fields are as follows:  
ERROR_BITS  
Total number of bit errors detected.  
Total time the test is running.  
RUN_TIME (SEC)  
ERRORS (SEC)  
SYNC_LOSS (SEC)  
ERROR_INJECT  
Total number of seconds in which errors have been detected.  
Total number of seconds in which loss of pattern occurred.  
Indicates whether errors are injected (ON) or not (OFF).  
All the counters have a range of 0 through 65535. When the maximum value  
is reached, the counter freezes, therefore in general the value of 65535  
indicates that the counter has overflown.  
Note  
Purpose  
DSP HDR TST  
Display the results of the last hardware test of the local HCD-E1. The results  
show the status detected during the power-on self-test, and any faults  
detected during regular operation.  
Syntax  
DSP HDR TST  
Use  
To display the local unit hardware test report, type  
DSP HDR TST<CR>  
Display Format  
The display shows NO HARDWARE FAILURE if everything checks good, or  
displays the appropriate message from the following list:  
EPROM FAILURE  
I/O EXP. FAILURE  
HDSL FRAMER FAILURE  
TRANSCEIVER FAILURE  
After the message HCD-E1 displays the date and time, followed by the  
HCD-E1 prompt.  
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Purpose  
DSP HDSL PM  
Display the contents of performance monitoring registers of a selected HDSL  
line of the local HCD-E1. For an explanation of the HDSL performance  
monitoring registers, refer to Section 5-3.  
Syntax  
DSP HDSL PM [LPX] [Option]  
Use  
1. To display the performance monitoring registers of the local unit, act as  
follows:  
To display the performance monitoring registers of HDSL line 1, type:  
DSP HDSL PM LP1<CR>  
or  
DSP HDSL PM<CR>  
To display the performance monitoring registers of HDSL line 2, type:  
DSP HDSL PM LP2<CR>  
To display current values of the performance monitoring registers of the  
HDSL line 1, and then clear all these registers and restart the count  
intervals, type:  
DSP HDSL PM LP1/CA<CR>  
or  
DSP HDSL PM<CR>/CA  
To display current values of the local performance monitoring registers of  
the HDSL line 2, and then clear all these registers and restart the count  
intervals, type:  
DSP HDSL PM LP2/CA<CR>  
A typical display is shown below:  
PM HDSL LINE  
- 1  
CURRENT ES  
= 0  
CURRENT UAS  
CURRENT SES  
CURRENT BBE  
CURRENT TIMER  
= 0  
= 0  
= 0  
= 388  
For the description and allowed range of the parameters, see HDSL  
Performance Monitoring in Section 5.3.  
2. Press any key to see the next screen:  
HCD-E1 displays this screen only if HCD-E1 has been working over  
15 minutes after power-up.  
Note  
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INTERVAL 01 ES = 000 UAS = 000 SES = 000 BBE = 000  
ESR = 00.00% SESR = 00.00% BBER = 00.00%  
INTERVAL 02 ES = 000 UAS = 000 SES = 000 BBE = 000  
ESR = 00.00% SESR = 00.00% BBER = 00.00%  
INTERVAL 03 ES = 000 UAS = 000 SES = 000 BBE = 000  
ESR = 00.00% SESR = 00.00% BBER = 00.00%  
INTERVAL 04 ES = 000 UAS = 025 SES = 026 BBE = 001  
ESR = 00.00% SESR = 02.88% BBER = 00.11%  
24 HOUR ES  
24 HOUR UAS  
24 HOUR SES  
24 HOUR BBE  
24 INTERVAL  
= 0  
= 25  
= 26  
= 1  
= 04  
Purpose  
DSP PB  
Display the priority bumping of time slots selected by the user.  
Syntax  
DSP PB <CR>  
Use  
To display the priority bumping of time slots, type:  
DSP PB<CR>  
A typical display is shown below:  
TIME SLOT MAPPING OF PRIORITY BUMPING  
=====================================  
TS:  
0
1
2
3
4
5
6
7
8
9
PRIORITY: HIGH LOW  
LOW  
LOW  
LOW  
LOW  
LOW  
LOW  
LOW  
LOW  
TS:  
10  
11  
12  
13  
14  
15  
16  
17  
18  
19  
PRIORITY: LOW  
LOW  
LOW  
LOW  
LOW  
LOW  
LOW  
LOW  
LOW  
LOW  
TS:  
20  
21  
22  
23  
24  
25  
26  
27  
28  
29  
PRIORITY: LOW  
LOW  
LOW  
LOW  
LOW  
LOW  
LOW  
LOW  
LOW  
LOW  
TS:  
30  
31  
TYPE:  
LOW  
LOW  
This command would show correct information only when one of the lines is  
down  
Note  
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Purpose  
DSP R HDR TST  
Display the results of the last hardware test performed by the unit located at  
the remote end of the HDSL link (during power-on self-test or regular  
operation).  
Syntax  
DSP R HDR TST  
Use  
To display the hardware test report, type  
DSP R HDR TST<CR>  
Display Format  
The display shows NO HARDWARE FAILURE if everything checks good, or  
displays the appropriate message from the following list:  
EPROM FAILURE  
I/O EXP. FAILURE  
HDSL FRAMER FAILURE  
TRANSCEIVER FAILURE  
After the message, HCD-E1 displays the date and time, followed by the  
HCD-E1 prompt.  
Purpose  
DSP R HDSL PM  
Display the contents of the performance monitoring registers of the  
appliance located at the remote end of the HDSL link.  
For an explanation of the HDSL performance monitoring registers, refer to  
Section 5-3.  
Syntax  
DSP R HDSL PM [LPX] [Option]  
Use  
To display the performance monitoring registers of HDSL line 1 of the  
remote unit, type:  
DSP R HDSL PM LP1<CR>  
or  
DSP R HDSL PM<CR>  
To display the performance monitoring registers of HDSL line 2 of the  
remote unit, type:  
DSP R HDSL PM LP2<CR>  
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To display current values of the performance monitoring registers of the  
HDSL line 1, and then clear all these registers and restart the count  
intervals, type:  
DSP R HDSL PM LP1/CA<CR>  
or  
DSP R HDSL PM/CA <CR>  
To display current values of the performance monitoring registers of the  
HDSL line 2, and then clear all these registers and restart the count  
intervals, type:  
DSP R HDSL PM LP2/CA<CR>  
The format of the display is similar to the format for the performance  
monitoring registers of the local unit, described in the DSP HDSL PM  
section above.  
Purpose  
DSP R SL PM  
Display the contents of the sublink performance monitoring registers of the  
unit located at the remote end of the HDSL link. This option is available  
only when the CRC-4 function is enabled on both sublinks: at the local and  
the remote ends of the HDSL link (see DEF SL command).  
For an explanation of the sublink performance monitoring registers, refer to  
Section 5-3.  
Syntax  
DSP R SL PM [Option]  
Use  
To display the performance monitoring registers of the sublink of the  
remote unit, type:  
DSP R SL PM<CR>  
To display current values of the performance monitoring registers of the  
sublink of the remote unit, and then clear only the event register, type:  
DSP R SL PM /C<CR>  
To display current values of the performance monitoring registers of the  
sublink of the remote unit, and then clear all these registers and restart  
the count intervals, type:  
DSP R SL PM /CA<CR>  
HCD-E1 performs the command and displays the date and the time  
followed by the HCD-E1 prompt.  
The format of the display is similar to the format for the local unit  
performance monitoring registers, described in the DSP SL PM section  
below.  
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In case the CRC-4 function is disabled, HCD-E1 displays an error message:  
ILLEGAL COMMAND FOR CURRENT MODE. If the CRC-4 function is enabled  
on the sublink of the local unit, but disabled at the remote end, HCD-E1 will  
display meaningless information.  
Note  
Purpose  
DSP REM AGENT  
Note  
Display information on the SNMP agents that are known to the IP router of  
the HCD-E1 when SNMP management is enabled.  
For SNMP management to be enabled, the following conditions must be  
satisfied:  
1. The units must have different IP addresses and different MUX_NAME’s.  
2. A dedicated slot must be assigned in both units.  
Syntax  
DSP REM AGENT  
Use  
To display the remote agent information, type:  
DSP REM AGENT  
If not all conditions listed above are fulfilled, HCD-E1 displays the following  
message:  
CAN NOT FIND REMOTE AGENT  
Otherwise, HCD-E1 displays a table listing the remote agents. A typical  
display is shown below:  
IP ADDRESS  
MUX NAME  
DISTANCE  
--------------------------------------  
192.114.50.2  
192.114.50.3  
RAD1  
RAD2  
006  
012  
The fields displayed for each agent are as follows:  
IP ADDRESS  
MUX NAME  
DISTANCE  
The IP address of the remote agent (see the DEF  
AGENT command above).  
The logical name of the remote agent (see the DEF  
NAME command above).  
The distance is a metric that indicates the logical  
distance (through the management network) to the  
remote agent, and is used, among other factors, in the  
selection of the optimal route to be used by the  
management traffic.  
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The distance is assigned as follows:  
Each segment between two IP routers is assigned a weight of 6. For  
example, when the path to an agent passes two HCD-E1 with their  
SNMP management enabled, the distance is 12.  
When the management network includes one or more additional distinct  
(alternate) paths between two IP routers that connect to the same remote  
agent, each such path is assigned a weight of 7 (6 + 1), 8 (6 + 2), etc. per  
segment. For example, if the route in the above example has an additional  
path in parallel with one segment, the additional route to RAD2 has a  
distance of 13; when additional paths are found in parallel with each  
segment, the distances will be 13, 14, 15.  
Purpose  
DSP SL PM  
Display the contents of the E1 sublink performance monitoring registers of  
the local HCD-E1. This option is available only when the CRC-4 function is  
enabled (see DEF SL command).  
For an explanation of the user's port performance monitoring registers, refer  
to Section 5-3.  
Syntax  
DSP SL PM [Option]  
Use  
1. To display the local performance monitoring registers, act as follows:  
To display the performance monitoring registers of the local unit sublink,  
type:  
DSP SL PM<CR>  
To display current values of the performance monitoring registers of the  
local unit sublink, and then clear only the event register, type:  
DSP SL PM /C<CR>  
To display current values of the performance monitoring registers of the  
local unit sublink, and then clear all these registers and restart the count  
intervals, type:  
DSP SL PM /CA<CR>  
A typical display is shown below:  
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PM OF PORT  
- A  
CRC ERROR EVENTS = 0  
CRC AVG ERR EVENTS = 0  
CURRENT ES  
= 0  
= 0  
= 0  
= 0  
= 0  
= 0  
= 176  
CURRENT UAS  
CURRENT SES  
CURRENT BES  
CURRENT LOFC  
CURRENT CSS  
CURRENT TIMER  
For the description and allowed range of the parameters, see E1  
Performance Monitoring in Section 5.3.  
2. Press any key to see the next screen:  
HCD-E1 displays this screen only if it has been working over 15 minutes after  
power-up.  
Note  
INTERVAL 01 ES = 000 UAS = 000 BES = 000 SES = 000 LOFC = 000 CSS = 000  
INTERVAL 02 ES = 000 UAS = 000 BES = 000 SES = 000 LOFC = 000 CSS = 000  
INTERVAL 03 ES = 001 UAS = 034 BES = 000 SES = 044 LOFC = 001 CSS = 001  
24 HOUR ES  
24 HOUR UAS  
24 HOUR SES  
24 HOUR BES  
= 1  
= 34  
= 44  
= 0  
24 HOUR LOFC = 1  
24 HOUR CSS = 1  
24 DEGRADE MIN = 0  
LAST 24 DEGRADE MIN = 0  
24 INTERVAL  
= 03  
If the CRC-4 function is disabled, HCD-E1 displays an error message: ILLEGAL  
COMMAND FOR CURRENT PORT MODE.  
Note  
Purpose  
DSP ST CH  
Display status information for a specified channel.  
Syntax  
DSP ST CH X  
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Use  
To display the status information for a selected channel, type:  
DSP ST CH 1<CR> or DSP ST CH 2<CR>  
A typical channel status display is shown below:  
STATUS OF CH -1  
INTERFACE = RS530  
LOOPS  
TYPE =  
REMOTE REM  
REM  
LOCAL BERT  
NO NO  
T_  
R_  
INBAND INBAND  
NO  
NO  
NO NO  
PORT STATE = CONNECTED  
RTS STATE = OFF  
Display Format  
The fields included in the status information display are listed below:  
LOCAL  
Indicates the state of the local loopback:  
NO - local loopback is deactivated.  
YES - local loopback is activated.  
REMOTE  
REM REM  
BERT  
Indicates the state of the remote loopback:  
NO - remote loopback is deactivated.  
YES - remote loopback is activated.  
Indicates the state of the remote remote loopback:  
NO - remote remote loopback is deactivated.  
YES - remote remote loopback is activated.  
Indicates the state of the BER test:  
NO - BER test is deactivated.  
YES - BER test is activated.  
T_INBAND  
R_INBAND  
PORT STATE  
Displays YES to indicate that the user requested the  
sending of the in-band remote loopback activation  
sequence.  
Displays YES when a loopback has been connected as a  
result of the reception of the in-band remote loopback  
activation sequence.  
Displays whether the selected channel is connected to  
another port:  
CONNECTED - the channel is connected.  
NOT CONNECTED - the channel is not connected.  
RTS  
Displays the state of the RTS line in the channel  
connector:  
OFF - the RTS line is not active.  
ON - the RTS line is active.  
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Purpose  
DSP ST LINE  
Display status information on the HDSL lines.  
Syntax  
DSP ST LINE [Option]  
Use  
To display the current status information for HDSL line 1, type:  
DSP ST LINE 1<CR> or DSP ST LINE<CR>  
HCD-E1 performs the command and displays the date and time  
followed by the HCD-E1 prompt.  
To monitor continuously line 1 status information, type:  
DSP ST LINE 1/R<CR> or DSP ST LINE /R<CR>  
The display will be automatically updated. To stop the monitoring,  
press CTRL+C.  
To display the current status information for HDSL line 2, type:  
DSP ST LINE 2<CR>  
HCD-E1 performs the command and displays the date and time  
followed by the HCD-E1 prompt.  
To monitor continuously line 2 status information, type:  
DSP ST LINE 2/R<CR>  
The display will be automatically updated. To stop the monitoring,  
press CTRL+C.  
Display Format  
A typical HDSL line status display is shown below.  
STATUS OF LINE  
LINE LOOP  
- 1  
= LOCAL  
=====  
NO  
LINE ALARMS  
HRPT LOOP  
= SYNC LOSS  
=========  
SIGNAL LOSS  
===========  
OFF  
OFF  
= NO  
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The fields included in the status information display are listed below:  
LINE LOOP  
Displays the state of the local line loop on the  
corresponding HDSL line.  
NO Local line loop is not activated  
YES Local line loop is activated  
LINE ALARMS  
Displays the state of the line alarms on the corresponding  
HDSL line:  
SYNC LOSS  
ON indicates loss of synchronization on the  
corresponding HDSL line.  
OFF indicates normal operation.  
SIGNAL LOSS ON indicates loss of input signal on the  
corresponding HDSL line.  
OFF indicates normal operation.  
HRPT LOOP  
Displays the state of the H-RPT loop towards the unit  
configured as central (appears only if H-RPT is present on  
the HDSL line).  
NO H-RPT loop is not activated  
YES H-RPT loop is activated  
Purpose  
DSP ST SL  
Display status information on the local E1 sublink, and optionally clear the  
BPV counters (applicable only when the CRC-4 function is disabled).  
Syntax  
DSP ST SL [Option]  
Use  
To display the current status information for the E1 sublink, type:  
DSP ST SL  
To display the status information, and then clear the BPV counters, type:  
DSP ST SL /C<CR>  
HCD-E1 performs the command and displays the date and time followed by  
the HCD-E1 prompt.  
To monitor continuously the status information, type:  
DSP ST SL /R<CR>  
The display will be automatically updated. To stop the monitoring,  
press CTRL+C.  
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Display Format  
A typical sublink status display is shown below.  
STATUS OF PORT  
TYPE  
= E1  
FUNCTION  
= DSU  
ALARMS  
= L. SYNC LOSS R. SYNC LOSS  
============ ============  
OFF  
OFF  
LOOPS  
= REM PORT  
========  
REM REM PORT LOCAL PORT  
============ ==========  
NO  
NO  
NO  
BPV LAST MINUTE = 0  
BPV WORST MINUTE = 1  
The fields included in the status information display are listed below:  
TYPE  
Displays the type of the sublink interface: E1  
FUNCTION  
Displays the type of interface hardware installed on the  
user's port: LTU or DSU  
ALARMS  
Indicates the status of the sublink alarms. The  
displayed alarms depend on the framing mode:  
For G732N, this field shows the local and remote  
‘loss of frame alignment’ alarms.  
For the unframed mode, L. SYNC LOSS shows the  
‘loss of signal’ alarm. R. SYNC LOSS is meaningless.  
LOOPS  
Displays the state of each type of loopback that can be  
activated on the user's port.  
BPV LAST MINUTE  
Displays the number of BPV events detected in the last  
minute. This counter is displayed only when the CRC-4  
function is disabled.  
BPV WORST MINUTE  
Displays the number of BPV events detected in the  
worst minute. This counter is displayed only with  
CRC-4 disabled.  
Purpose  
DSP ST SYS  
Display system status information.  
Syntax  
DSP ST SYS  
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Use  
To view the current system status, type:  
DSP ST SYS<CR>  
HCD-E1 performs the command and displays the date and the time  
followed by the HCD-E1 prompt.  
Display Format  
A typical status information display is shown below.  
NODE  
= 0  
NAME  
= 'HCD-E1 name'  
= INT  
NODAL CLOCK  
HTU TYPE  
= CENTRAL  
= HCD-E1  
= 2.0  
REMOTE HTU TYPE  
SOFTWARE VER  
HARDWARE VER  
DTE INT. TYPE CH 1  
DTE INT. TYPE CH 2  
HRPT:  
= 0.0  
= V35  
= RS530  
= NTU_SIDE  
= 1.0  
HRPT SOFTWARE VER  
HRPT HARDWARE VER  
= 1.0  
The system status fields are described below (from top to bottom):  
NODE  
NAME  
The node number of the HCD-E1  
The node name of the HCD-E1 (if you have defined it  
with the DEF NAME command)  
NODAL CLOCK  
For a unit configured as central, indicates the current  
source for the HCD-E1 system clock: INT, SL, CH1 or  
CH2.  
For a unit configured as remote, always shows LBT.  
HCD TYPE  
Indicates the function of the HCD-E1: CENTRAL or  
REMOTE  
REMOTE HCD TYPE  
Indicates type of the unit at the remote end of the HDSL  
link  
SOFTWARE VER  
HCD-E1 software version  
HARDWARE VER  
DTE INT. TYPE CH 1  
DTE INT. TYPE CH 2  
HCD-E1 hardware version  
Type of interface of data channel 1  
Type of interface of data channel 2  
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HRPT  
Indicates whether there is an H-RPT repeater on the  
HDSL link, and the side of H-RPT to which your  
HCD-E1 is connected.  
DOESN’T  
EXIST  
There is no H-RPT on the HDSL link.  
NTU_SIDE Your HCD-E1 is configured as central  
LTU_SIDE Your HCD-E1 is configured as remote  
HRPT SOFTWARE VER  
HRPT HARDWARE VER  
H-RPT software version (this field is displayed only  
if there is H-RPT on the HDSL link)  
H-RPT hardware version (this field is displayed  
only if there is H-RPT on the HDSL link)  
Purpose  
DSP TS  
Display the allocation of the time slots of the HDSL signal.  
Syntax  
DSP TS  
Use  
To display the time slot information, type:  
DSP TS<CR>  
A typical display is shown below:  
TIME SLOT MAPPING OF MAIN LINES  
==============================  
TS:  
0
1
2
3
4
5
6
7
8
9
TYPE:  
NC  
NC  
NC  
NC  
NC  
NC  
NC  
CH2  
NC  
NC  
TS:  
10  
NC  
11  
NC  
12  
13  
NC  
14  
NC  
15  
NC  
16  
NC  
17  
NC  
18  
NC  
19  
NC  
TYPE:  
CH1  
TS:  
20  
NC  
21  
NC  
22  
SL  
23  
NC  
24  
NC  
25  
NC  
26  
27  
28  
NC  
29  
NC  
TYPE:  
DEDIC NC  
TS:  
30  
NC  
31  
NC  
TYPE:  
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Following is a list of fields appearing in the time slot display:  
Indicates the main link time slot number 0 through 31  
Indicates the type of time slot assignment:  
TS  
TYPE  
NC  
time slot not assigned  
CH1  
CH2  
SL  
time slot is assigned to data channel 1  
time slot is assigned to data channel 2  
time slot is assigned to E1 sublink  
time slot is assigned for in-band management  
DEDIC  
After performing the command, HCD-E1 displays the date and the time  
followed by the HCD-E1 prompt.  
Purpose  
EXIT  
End the current session and return control to the HCD-E1 front panel.  
Syntax  
EXIT  
Use  
Type:  
EXIT<CR>  
HCD-E1 performs the command and displays the date and the time  
followed by the HCD-E1 prompt.  
Purpose  
F
Define the codes used to be sent to the supervision terminal to perform the  
following terminal control functions:  
Clear the screen  
Move the cursor to the screen home position.  
Move the cursor to the right by one position.  
The codes used by typical terminals are listed in the following table:  
Function  
Terminal Type  
TV920  
VT52  
VT100  
Freedom100  
1B2A0000  
1E000000  
Freedom220  
1B5B324A  
1B5B4800  
1B5B0143  
Clear Screen  
Cursor Home  
Cursor Right  
1B2A0000  
1E000000  
0C000000  
N/A  
1B5B324A  
1B5B4800  
1B5B3143  
1B480000  
1B430000  
0C000000  
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Syntax  
F
Use  
1. To display the current codes, type:  
F<CR>  
The terminal function entry screen is displayed. The screen includes  
three separate lines, displayed one after the other. A typical screen,  
showing all the three lines, is shown below:  
CLEAR SCREEN  
CURSOR HOME  
CURSOR RIGHT  
= hhhhhhhh  
= hhhhhhhh  
= hhhhhhhh  
where h indicates hexadecimal digits.  
2. To change a code, bring the cursor under the first digit of the code to  
be changed, by pressing <CR>, then enter the appropriate  
hexadecimal digits of the code.  
3. Repeat the procedure until all the necessary codes are changed.  
HCD-E1 performs the command and displays the date and the time  
followed by the HCD-E1 prompt.  
Purpose  
H or HELP  
Display an index of the control port commands and the options available for  
each command.  
Syntax  
H or HELP  
Use  
Type:  
H or HELP<CR>  
HCD-E1 displays the first HELP page. Press any key to see the next page.  
If H-RPT is connected on the HDSL link, you will also get commands for its  
support.  
Note  
When finished, HCD-E1 displays the date and the time followed by the  
HCD-E1 prompt.  
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Purpose  
INIT DB  
Erase the user-defined configuration from the database and load the  
database with a specified set of default parameters values (see Table 4-2).  
Syntax  
INIT DB  
Use  
Type:  
INIT DB<CR>  
This command loads the default parameters and resets the HCD-E1.  
Traffic through HCD-E1 may be interrupted until you configure it anew.  
Note  
Table 4-2 HCD-E1 Default Configuration  
Parameter Type  
Parameter Designation  
Default Value  
General  
PASSWORD  
HCD  
NODE (node number)  
CLEAR SCREEN  
CURSOR HOME  
CURSOR RIGHT  
0
1B5B324A  
1B5B4800  
1B5B3143  
SYSTEM  
CLK_MASTER  
CLK_FBACK  
CONFIG REM  
INT  
NONE  
YES  
SL (sublink)  
FRAME  
CRC-4  
G732N  
NO  
SYNC  
CCITT  
FF  
USER  
NC  
IDLE_TS_CODE  
MAP_TYPE  
NUM_OF_TS  
Time Slots  
NC  
SP (control port)  
SPEED  
DATA  
AUTO  
8
PARITY  
INTERFACE  
CTS  
DCD_DEL  
DSR  
NONE  
DCE  
=RTS  
0_MS  
ON  
POP_ALM  
PWD  
NO  
NO  
LOG_OFF  
AUXILIARY DEVICE  
NO  
TERMINAL  
CH1/CH2  
FRAME  
FRAMED  
64  
USER  
NC  
MULTIPLIER  
MAP_TYPE  
SPEED  
CTS  
ON  
FIFO_SIZE  
CLOCK_MODE  
Time Slots  
AUTO  
DCE  
NC  
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Table 4-2 HCD-E1 Default Configuration (Cont.)  
Parameter Type  
Parameter Designation  
Default Value  
BERT  
PATTERN  
2E3-1  
ERROR_INJECTION_RATE  
RX_INBAND  
NO ERR  
DISABLE  
DOWNLOAD  
ML_DL_MODE  
SL_DL_MODE  
NONE  
NONE  
Purpose  
INIT F  
Resets the terminal control codes used to clear the terminal screen, to move  
the cursor to the right, and to return the cursor to the home position to 0.  
Syntax  
INIT F  
Use  
Type:  
INIT F<CR>  
HCD-E1 performs the command and displays the date and the time  
followed by the HCD-E1 prompt.  
Purpose  
LOOP  
Activate a user-controlled loopback on HCD-E1 (see Section 5-4 for the  
loopback descriptions).  
Syntax  
LOOP [loop type]  
Use  
To activate a loopback, type the appropriate command. The commands  
depend on the loopback type, on the channel or link for the loop to be  
performed on, and on the type of unit working opposite HCD-E1. The  
following table lists all the commands available:  
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To activate  
Type  
BERT test on data channel X of HCD-E1  
LOOP BERT CH X, or LP BERT CH X*  
In-band loopback on data channel X of the remote unit  
LOOP INBAND CH X, or LP INBAND CH X*  
LOOP L LINE, or LP L LINE  
Local (L) loopback on the HDSL lines (only from the unit  
configured as central)  
Local (L) loopback on data channel X of local HCD-E1  
Remote (R) loopback on data channel X of local HCD-E1  
Remote (R) loopback on data channel X of remote unit  
Local (L) loopback on the E1 sublink of the local HCD-E1  
LOOP L CH X, or LP L CH X*  
LOOP R CH X, or LP R CH X*  
LOOP R R CH X, or LP R R CH X*  
LOOP L SL, or LP L SL  
Remote (R) loopback on the E1 sublink of the local  
HCD-E1  
LOOP R SL, or LP R SL  
Remote (R) loopback on the E1 sublink of the remote unit  
LOOP R R SL, or LP R R SL  
LOOP L HRPT, or LP L HRPT  
Local loopback on H-RPT (only from the unit configured as  
central)  
HCD-E1 performs the requested command and displays the date and time,  
followed by the HCD-E1 prompt.  
Purpose  
RESET  
Reset HCD-E1. This command causes HCD-E1 to initialize, therefore the  
traffic through HCD-E1 will be disrupted until HCD-E1 returns to normal  
operation.  
Syntax  
RESET  
Use  
To reset HCD-E1, type:  
RESET<CR>  
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Purpose  
TIME  
Set the time for the HCD-E1 internal real-time clock.  
Syntax  
TIME  
Use  
1. Type:  
TIME<CR>  
HCD-E1 sends the entry line for the first parameter:  
HOUR  
= 12  
2. If you do not want to change the current value of the parameter, press  
<CR> to confirm it and continue to the next line, otherwise press F to  
increase or B to decrease the displayed values, and then press <CR>  
to confirm the selected value. HCD-E1 displays the entry line for the  
next parameter.  
3. Repeat the procedure until all the parameters are defined, and then  
press <CR> to end.  
Set the time about one minute beyond the current time and then press  
<CR> at the correct instant.  
Tip  
A typical display, as seen after all the parameters are selected, is shown  
below:  
HOUR  
= 12  
= 25  
= 16  
MINUTE  
SECOND  
Below HCD-E1 displays the date and time (note that the time has changed),  
followed by the HCD-E1 prompt.  
4.6 Supervision Terminal Operating Instructions  
Before using the supervision terminal make sure the preparations listed in  
Section 4-3 have been completed and all the relevant equipment have been  
turned on.  
When the terminal is used to control a single HCD-E1, always assign node  
number 0 to the HCD-E1. Use the following startup sequence to connect to  
a HCD-E1 that has been assigned node number 0. We assume that you are  
using the AUTO (Autobaud) mode, which is the default one when you  
switch on the equipment.  
Starting a Session  
- Single HCD-E1  
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1. Press the <CR> key three times. When HCD-E1 has successfully  
identified the data rate of the supervision terminal, it notifies you of the  
results of its power-up self-test:  
HCD Self Test in Progress...OK, or  
HCD Self Test in Progress...Failed  
If the HCD-E1 self test failed, you must repair HCD-E1 before you  
can continue using it.  
If HCD-E1 successfully passed the power-up self-test, it sends the  
following message:  
HCD Supervisory Port On Line. Type ‘H’ For Help  
Pressing <CR> activates the HCD-E1 self-test only if it is the first session after  
HCD-E1 has been turned on.  
Note  
If the optional password protection has been activated, HCD-E1  
displays the following prompt:  
PASSWORD>  
2. Type the password (four to eight characters) and then press <CR>.  
For each password character typed by you the terminal displays an  
asterisk *. The default password is HCD.  
3. If the password is accepted, HCD-E1 enters the session, and the  
terminal displays:  
HCD>  
The HCD-E1 front panel display shows:  
TERMINAL ON LINE  
The front panel controls are disabled as long as HCD-E1 is under remote  
control.  
To regain the front-panel control at the local site, use the options described  
in the section “Ending a Control Session” below.  
Note  
When one terminal is used to control several HCD-E1 connected via  
modems, non-zero node numbers are assigned to each HCD-E1. The node  
numbers, in the range of 1 to 255, are assigned during the first session (see  
the previous section), by means of the command DEF NODE.  
Starting a Session  
- Multiple HCD-E1  
If you are using a multidrop configuration, do not assign address 0 to any of  
the HCD-E1 connected to a given terminal. Make sure the interface type is  
set as DTE, and select the appropriate DCD_DEL parameter.  
Important  
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To establish a session with a specific HCD-E1, use the following procedure:  
1. Press the <CR> key three times.  
2. Type NODE, space, the desired HCD-E1 node number, another space,  
and then type the desired command and press <CR>. For example,  
with node number 234, type:  
NODE<SP>234<SP> 'command' <CR>  
If the addressed HCD-E1 does not use password protection, it  
immediately executes the command.  
If the addressed HCD-E1 is password-protected, it displays a row of  
asterisks instead of the command you have typed. After you press  
<CR>, it displays the following prompt:  
PASSWORD>  
3. Type again the node number part and then the password. For example,  
for node number 234, type:  
NODE<SP>234<SP>'password'<CR>  
4. If the password is correct, HCD-E1 displays the working prompt:  
HCD>. Otherwise, it displays the password prompt once more:  
PASSWORD>  
5. Enter your command following the HCD working prompt.  
During the control session, you type the desired commands at the terminal  
keyboard. You must see the HCD-E1 echo character by character.  
Control Session  
For a multidrop configuration, always prefix your command with a node  
number part, as described above.  
If a wrong character appears, backspace to clear the error, and then type  
again the correct character.  
When you see the correct and complete command in the echo line, press  
<CR> to execute the command. HCD-E1 processes the command and  
displays the appropriate response.  
At the end of the command execution, HCD-E1 displays the current date  
and time, and then provides a new prompt for the next command line.  
If you changed your mind, and want to abort the command, press CTRL+C.  
You will again receive the prompt, so you can enter another command.  
Use CTRL+C to stop automatic repetition of commands sent with the /R  
option.  
Note  
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If your command is not correct, HCD-E1 does not execute it and displays  
the following:  
- ‘Bad command or parameter. Type 'H' for help’  
if the command syntax is wrong  
-
An appropriate error message (see Section 5.5 in Chapter 5) if the  
command is not valid in the current system configuration or values  
you are trying to set are wrong.  
The correct command must then be sent again.  
If the terminal screen fills up during the exchange with HCD-E1, HCD-E1  
displays the message:  
HIT ANY KEY TO CONTINUE...  
After pressing any key, the terminal scrolls to the next page.  
You can end the control session in one of the following three ways:  
Ending a Control  
Session  
Disconnect the cable from the HCD-E1 front-panel CONTROL DCE  
connector.  
Send the EXIT command from the supervision terminal.  
HCD-E1 automatically returns to front panel control if no commands  
are received for a certain period of time (controlled by the LOG_OFF  
parameter). You can, however, disable this time-out and thus also this  
way of ending the session.  
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Chapter 5  
Troubleshooting and  
Diagnostics  
5.1 General  
This chapter describes the HCD-E1 diagnostics functions, which include:  
Status indications and alarms - Section 5.2  
Performance diagnostics - Section 5.3  
Diagnostic loopbacks - Section 5.4  
Configuration error messages - Section 5.5  
Power-up self-test - Section 5.6  
Troubleshooting instructions - Section 5.7.  
5.2 Status Indications and Alarms  
The status of HCD-E1 is indicated by the ALM, TST, E1 LOS and HDSL LOS  
LED indicators located on the front panel. For description of LED indicators  
and their functions, refer to Table 3-1 and Section 3.5, Operating  
Instructions, in Chapter 3.  
Front-Panel LEDs  
Alarms  
HCD-E1 maintains an alarm buffer, which can store a maximum of  
100 alarms. Alarms can be of two types, designated as ON/OFF and ON:  
A message indicating an ON/OFF-type alarm is displayed on the LCD  
only when the alarm condition is present, and is automatically stopped  
from being displayed when the alarm condition is cleared (if the alarm is  
being displayed, it will disappear only when the display is refreshed by  
scrolling).  
A message indicating an ON-type alarm still can be displayed on the LCD  
even after the event that caused the alarm condition is cleared.  
In this manual, we often use the term ON-state alarm. An ON-state alarm is  
either an ON-type alarm or an ON/OFF-type alarm when its alarm condition  
is still present.  
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When an ON/OFF-type alarm changes its state from ON to OFF, it is not  
removed from the alarm buffer. Moreover, a new entry of this alarm is  
added to the alarm buffer. This feature enables you to see the alarm history  
on the terminal using the DSP ALM command. A typical display looks like  
this:  
ALARM 01  
ALARM 01  
SIGNAL LOSS: SL  
SIGNAL LOSS: SL  
OFF  
ON  
1998-01-01  
1998-01-01  
00:04.46  
00:00.01  
Messages displayed on the LCD and on the control terminal have a similar  
syntax. Table 5-1 presents in alphabetical order the alarm messages  
displayed on the HCD-E1 LCD and control terminal, and lists the actions  
required to correct the alarm condition.  
If you have an H-RPT repeater on the HDSL link, HCD-E1 allows you to  
monitor and work with the H-RPT alarms via its supervision terminal. The  
H-PRT buffer stores a maximum of 100 alarms. The types and states of the  
H-RPT alarms and the rules of working with the H-RPT alarm buffer are  
exactly the same as for the HCD-E1 alarm buffer. Table 5-2 presents the  
H-RPT alarm messages displayed on the HCD-E1 control terminal in order of  
their numbers, and lists the actions required to correct the alarm condition.  
The H-RPT alarms are not available from the LCD.  
H-RPT Alarms  
Alarm Relay  
HCD-E1 has an alarm relay, which enables you to automatically turn on  
alarm indication by properly connecting the relay alarm contacts to your  
alarm equipment (see “Connecting the HCD-E1 Alarm Relay Port” in  
Chapter 2).  
The Alarm Relay has a pair of change-over dry contacts: the Normally-Open  
(NO) contacts close in case of an alarm, and the Normally-Close ( NC)  
contacts open in case of an alarm. The alarm contacts are floating with  
respect to the signal and chassis grounds of HCD-E1.  
The following events will activate the alarm relay:  
Loss of power (indicated by the NO contacts)  
Detection of a hardware failure, or any other failure, during the power-  
up self-test  
Detection of real-time clock battery failure during the power-up self-test  
Detection of a disruption in the database during the power-up self-test  
Loss of HDSL lines (1 or 2) synchronization  
Signal loss, excessive bit error rate, excessive rate of bipolar violations,  
loss of local or remote frame synchronization or reception of AIS on the  
E1 sublink.  
The corresponding alarms in Table 5-1 are marked with an asterisk (*). The  
relay returns automatically to the no-alarm state when none of the alarm  
conditions listed above is present.  
5-2  
Status Indications and Alarms  
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Table 5-1 HCD-E1 Alarm Buffer Messages  
LCD Message  
AIS OCCURR: SL*  
AIS SYN LOS: SL*  
_
Terminal Message  
AIS OCCURRED: SL*  
AIS SYNC LOSS: SL*  
Alarm  
Number  
Probable Cause  
Corrective Actions  
Alarm  
Type  
12  
AIS is being detected on the E1 Check the equipment connected to the E1 sublink. ON/OFF  
sublink.  
13  
16  
AIS and loss of frame alignment Check the equipment connected to the E1 sublink. ON/OFF  
on the E1 sublink.  
ALARM BUFFER  
OVERFLOW  
More than 100 alarms entries  
have been written in the alarm  
buffer since the last clear  
Read the messages and then clear the buffer by  
sending the CLR ALM/A command from the  
control terminal.  
ON/OFF  
command. New alarms are  
overwriting the older alarms.  
BPV ERROR: SL  
BPV ERROR: SL  
02  
10  
A bipolar violation error has  
been detected on the local unit’s its DTE.  
E1 sublink.  
Check the connection between the E1 sublink and ON  
CRC-4 ERROR: SL  
CRC-4 ERROR: SL  
Bit errors have been detected by Check the connection between the E1 sublink and ON  
CRC-4 checking on the data  
received by the local unit’s  
sublink.  
its DTE.  
DB CHKSUM ERR*  
DB CHECKSUM ERROR* 15  
The database currently stored in 1. Enter the INIT DB command from the control  
ON/OFF  
the non-volatile memory of  
HCD-E1 is corrupted.  
terminal or set the DB INIT section of switch S2  
to ON, to load the default configuration in the  
place of the current database, then reconfigure  
HCD-E1 with the desired parameters.  
2. Perform the power-up self-test and replace  
HCD-E1 if it fails the test.  
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Table 5-1 HCD-E1 Alarm Buffer Messages (Cont.)  
LCD Message  
Terminal Message  
Alarm  
Number  
Probable Cause  
Corrective Actions  
Alarm  
Type  
DB-INIT DW IS ON  
DB-INIT SWITCH IS ON 21  
Section DB INIT is set to ON.  
If it is no longer necessary to enforce the default  
ON  
This message appears only upon database parameter values, change setting to OFF.  
power-up.  
DIAL CYCLE FAIL*  
DIFF DEDIC TS  
DP DIAL CYCLE FAILED* 44  
The current cycle of call  
attempts (both to the primary  
and alternate numbers) failed.  
Check the modem connected to the CONTROL  
DCE connector. If the called numbers are often  
busy, you may also increase the number of call  
retries  
ON  
DIFFERENT DTS  
39  
46  
The time slot assigned for  
Select the time slots assigned for management  
ON/OFF  
ON  
CENTRAL & REMOTE  
management in the central unit correctly.  
and in the remote unit are not  
the same time slot  
DP ALT CALL FAIL*  
DP ALTERNATE CALL  
FAILED*  
The call attempts to the alternate If the number is not busy, check the modem  
dial-out number failed  
connected to the CONTROL DCE connector. If  
the called numbers (primary as well as alternate)  
are often busy, you may also increase the number  
of call retries  
DP PRM CALL FAIL*  
DP PRIMARY CALL  
FAILED*  
45  
The call attempts to the primary If the number is not busy, check the modem  
ON  
dial-out number failed  
connected to the CONTROL DCE connector. If  
the called number is often busy, you may also  
increase the number of call retries  
Alarms 44, 45 and 46 appear only when you perform a DSP ALM REM command and you have HTU-E1 or HTU-2 at the  
remote site.  
Note  
5-4  
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Table 5-1 HCD-E1 Alarm Buffer Messages (Cont.)  
LCD Message  
Terminal Message  
Alarm  
Number  
Probable Cause  
Corrective Actions  
Alarm  
Type  
DTE NOT CON CH:1 DTE NOT CONNECTED  
TO CH:1  
38  
The Ethernet interface is not  
connected to an operating LAN media, and check that at least one station is active  
on the LAN  
Check the cable connecting the LAN, the LAN  
ON/OFF  
ON/OFF  
ON  
DTE NOT CON CH:2 DTE NOT CONNECTED  
TO CH:2  
41  
34  
The Ethernet interface is not  
connected to an operating LAN media, and check that at least one station is active  
on the LAN  
Check the cable connecting the LAN, the LAN  
ELASTIC BUF OVF  
ELASTIC BUFFER  
OVERFLOW  
The HDSL elastic buffer is  
overflown.  
1. Check the timing of clocks selected in the  
system, and make sure that they are derived  
from the same source.  
2. Perform the power-up self-test and replace  
HCD-E1 if it fails the test.  
ELS BUF ERR: LP1  
ELS BUF ERR: LP2  
ELASTIC BUFFER ERROR: 33  
LP1  
ELASTIC BUFFER ERROR:  
LP2  
The corresponding HDSL line is 1. Check HDSL line connections.  
not supplying data.  
ON  
2. Check the operation of the local and remote  
units and replace if necessary.  
EXC ERR RAT: SL*  
EXCESS BPV: SL*  
EXCESSIVE ERROR  
RATIO: SL*  
11  
07  
Excessive bit error rate (higher  
Check the connection between the E1 sublink and ON/OFF  
than 10-3) is detected in the data its DTE.  
received by the local unit’s  
sublink.  
EXCESSIVE BPV: SL*  
Excessive BPV are detected on  
the E1 sublink.  
1. Check if there is a problem in the network  
ON/OFF  
facilities used by the E1 sublink.  
2. Perform the power-up self-test and replace  
HCD-E1 if it fails the test.  
Alarm 38 appears only when you perform DSP ALM REM command and you have an HTU-2 at the remote site.  
Note  
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Table 5-1 HCD-E1 Alarm Buffer Messages (Cont.)  
LCD Message  
Terminal Message Alarm  
Cause  
Corrective Actions  
Alarm  
Type  
Number  
FALLBACK CLK USE* CLOCK WAS  
CHANGED TO  
47  
HCD-E1 switched to the fallback Check the master clock source. A clock source  
clock source, because the master (recovered from CH1, or CH2, or SL) is replaced as a  
ON  
FALLBACK*  
clock source failed.  
result of failure under the following conditions:  
CH1, CH2 - fails when data channel equipment is  
disconnected or inoperative (DTR line not asserted)  
SL - fails when the E1 sublink loses frame  
synchronization  
FRAME SLIP: SL  
FRAME SLIP: SL  
04  
A frame slip occurred on the E1  
sublink.  
1. Check the clock source selection.  
ON  
2. Check the clock source stability at far end of the  
E1 link.  
3. Perform the power-up self-test and replace  
HCD-E1 if it fails the test.  
HARDWARE  
FAILURE*  
HARDWARE  
FAILURE*  
18  
24  
HCD-E1 technical failure (failure  
of one of the internal  
programmable components). This  
message can appear only upon  
power-up.  
Replace HCD-E1.  
ON  
1. Check the two clock sources.  
2. Perform the power-up self-test and replace  
HCD-E1 if it fails the test.  
INTERNAL CLK USE  
CLOCK WAS  
CHANGED TO  
INTERNAL  
HCD-E1 configured as central  
switched to the internal clock  
source, because both the master  
and the fallback clock sources  
failed.  
ON/OFF  
5-6  
Status Indications and Alarms  
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Table 5-1 HCD-E1 Alarm Buffer Messages (Cont.)  
LCD Message  
Terminal Message  
Alarm  
Number  
Cause  
Corrective Actions  
Alarm  
Type  
L. SYNC LOSS: SL*  
LOCAL SYNC LOSS: SL* 14  
Local loss of frame  
synchronization alarm on the  
sublink  
1. Check cable connections between the E1  
ON/OFF  
sublink and its DTE.  
2. Check the line and/or other communication  
equipment connected to the E1 sublink.  
3. Perform the power-up self-test and replace the  
HCD-E1 if it fails the test.  
LOC CRC ALM: LP1  
LOC CRC ALM: LP2  
LOCAL CRC ALM: LP1  
LOCAL CRC ALM: LP2  
30  
A CRC-6 error has been  
detected in the input signal of  
the specified HDSL line.  
If the number of CRC-6 errors is significant (more ON  
than a few errors per hour), perform the following:  
1. Check the HDSL lines to the remote unit.  
2. Perform self-test on the two units and replace  
the unit that fails the self-test.  
LOOP INBAND ON:  
CHX  
LOOP INBAND ON: CHX 42  
LOOPS ARE INVERTED 32  
In-band loopback is connected  
on the appropriate channel.  
Set the inband loop to OFF, if you don’t need it  
any more.  
ON/OFF  
LOOPS INVERTED  
The unit (configured as remote) Internally, the remote unit automatically corrects  
ON/OFF  
detected incorrect HDSL line  
connections (interchange  
the connections to enable regular operation.  
between the two HDSL lines).  
Normal state - no action required  
MASTER CLK USE*  
CLOCK WAS CHANGED 48  
TO MASTER*  
HCD-E1, configured as central,  
switched back to the clock  
source selected as the master  
source.  
ON  
PHASOR OVF:CH1  
PHASOR OVF:CH2  
PHASOR  
OVERFLOW:CH1  
37  
40  
A problem of receive or transmit Check the remote equipment.  
clock between the data channels  
ON  
ON  
PHASOR  
OVERFLOW:CH2  
A problem of receive or transmit Check the remote equipment.  
clock between the data channels  
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Table 5-1 HCD-E1 Alarm Buffer Messages (Cont.)  
LCD Message  
Terminal Message  
Alarm  
Number  
Cause  
Corrective Actions  
Alarm  
Type  
PSWRD DW IS ON  
PSWRD SWITCH IS ON  
19  
Section PASSWD is set to ON.  
If it is no longer necessary to enforce the default  
ON  
This message appears only upon password and node number, change setting to  
power-up.  
OFF.  
REM BPV ERROR  
REMOTE BPV ERROR  
28  
A report of bipolar violation  
error at the sublink of the  
remote appliance has been  
received via the eoc.  
Have the link between the E1 sublink of the  
remote unit and its DTE checked.  
ON  
REM CRC ALM: LP1  
REM CRC ALM: LP2  
REMOTE CRC ALM: LP1 31  
REMOTE CRC ALM: LP2  
The remote unit reports that a  
CRC-6 error has been detected than a few errors per hour), perform the following:  
If the number of CRC-6 errors is significant (more ON  
in the input signal of the  
1. Check the HDSL lines to the remote unit.  
specified HDSL line.  
2. Perform self-test on the two units and replace  
the one that fails the self-test.  
REM IND ALARM*  
REM SIGNAL LOSS*  
REMOTE INDICATION  
ALARM*  
29  
The remote unit reports a  
remote sync loss alarm occurred  
at its E1 sublink.  
1. Check cable connections between the E1  
sublink of the remote unit and its DTE.  
ON/OFF  
ON/OFF  
2. Check the line and/or other communication  
equipment connected to the E1 sublink.  
3. Replace the remote equipment.  
REMOTE SIGNAL LOSS* 27  
A report of loss of input signal at 1. Check cable connections between the E1  
the E1 sublink of the remote  
equipment has been received.  
sublink of the remote unit and its DTE.  
2. Check the line and/or other communication  
equipment connected to the E1 sublink of the  
remote unit.  
3. Replace the remote equipment.  
5-8  
Status Indications and Alarms  
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Table 5-1 HCD-E1 Alarm Buffer Messages (Cont.)  
LCD Message  
Terminal Message  
Alarm  
Number  
Cause  
Corrective Actions  
Alarm  
Type  
R. SYNC LOSS: SL  
REMOTE SYNC LOSS: SL 23  
The equipment connected to  
the E1 sublink reports loss of  
frame alignment.  
Check the equipment connected to the E1 sublink ON/OFF  
of your HCD-E1  
RTC BATTERY FAIL*  
REAL TIME CLOCK  
BATTERY FAILURE*  
22  
The battery that powers the  
HCD-E1 internal real-time clock  
when HCD-E1 is not powered,  
has failed. This message appears  
only upon power-up.  
Have the HCD-E1 repaired.  
ON  
SELF TEST ERROR*  
SELF TEST ERROR*  
17  
25  
A problem has been detected  
during HCD-E1 self-test.  
Repeat the self-test, and replace the  
HCD-E1 if it fails the self-test.  
ON  
SIGNAL LOSS:LP1*  
SIGNAL LOSS:LP2*  
SIGNAL LOSS:LP1*  
SIGNAL LOSS:LP2*  
Loss of HDSL line input signal.  
1. Check the corresponding HDSL line.  
ON/OFF  
2. Perform self-test on the two units and replace  
the one that fails the self-test.  
SIGNAL LOSS: SL*  
SIGNAL LOSS: SL*  
01  
Loss of input signal on the E1  
sublink.  
1. Check cable connections to the E1 sublink  
connector.  
ON/OFF  
2. Check the line and/or other communication  
equipment connected to the E1 sublink.  
SP-PAR DW IS ON  
STUFF OVERFLOW  
SP-PAR SWITCH IS ON  
STUFFING OVERFLOW  
20  
35  
Section DEF SP is set to ON.  
This message appears only upon control port parameters, change setting to OFF  
power-up.  
If it is no longer necessary to enforce the default  
ON  
ON  
The stuffing mechanism cannot 1. Check the clock source selection.  
compensate for the frequency  
2. Check the equipment providing the DTE signal  
difference between the DTE  
(unstable clock source).  
clock and the HDSL clock.  
3. Perform the power-up self-test and replace the  
HCD-E1 if it fails the test.  
01/01/01 08:15  
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Table 5-1 HCD-E1 Alarm Buffer Messages (Cont.)  
LCD Message  
Terminal Message  
Alarm  
Number  
Cause  
Corrective Actions  
Alarm  
Type  
SYNC LOSS:LP1*  
SYNC LOSS:LP2*  
SYNC LOSS:LP1*  
SYNC LOSS:LP2*  
26  
Loss of synchronization on the  
specified HDSL line.  
1. Check the corresponding HDSL line.  
ON/OFF  
2. Perform self-test on the two units and replace  
the one that fails the self-test.  
TIMING OVERFLOW TIMING OVERFLOW  
36  
The data line recovery circuits  
cannot recover the data line  
clock, because its frequency is  
not within the supported range.  
1. Check the equipment providing the data signal, ON  
and make sure its clock source is stable.  
2. Perform the power-up self-test and replace  
HCD-E1 if it fails the test.  
Table 5-2 H-RPT Alarm Buffer Messages  
Alarm Message  
Alarm  
Number  
Cause  
Corrective Actions  
Alarm  
Type  
HRPT_LTU SIGNAL LOSS:LP1  
HRPT_LTU SIGNAL LOSS:LP2  
01  
02  
03  
Loss of input signal on the  
specified HDSL line at the LTU  
side of H-RPT.  
1. Check the corresponding HDSL line.  
ON/OFF  
ON/OFF  
ON/OFF  
2. Perform a self-test on the unit configured as remote and  
replace the unit if it fails the self-test.  
3. Replace H-RPT.  
HRPT_NTU SIGNAL LOSS:LP1  
HRPT_NTU SIGNAL LOSS:LP2  
Loss of input signal on the  
specified HDSL line at the NTU  
side of H-RPT.  
1. Check the corresponding HDSL line.  
2. Perform a self-test on the unit configured as central and  
replace the unit if it fails the self-test.  
3. Replace H-RPT.  
HRPT_LTU SYNC LOSS:LP1  
HRPT_LTU SYNC LOSS:LP2  
Loss of synchronization on the  
specified HDSL line at the LTU  
side of H-RPT.  
1. Check the corresponding HDSL line.  
2. Perform a self-test on the unit configured as remote and  
replace the unit if it fails the self-test.  
3. Replace H-RPT.  
5-10  
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Table 5-2 HCD-E1 Alarm Buffer Messages (Cont.)  
Alarm Message  
Alarm  
Number  
Cause  
Corrective Actions  
Alarm  
Type  
HRPT_NTU SYNC LOSS:LP1  
HRPT_NTU SYNC LOSS:LP2  
04  
Loss of synchronization on the  
specified HDSL line at the NTU  
side of H-RPT.  
1. Check the corresponding HDSL line.  
ON/OFF  
2. Perform a self-test on the unit configured as central and  
replace the unit if it fails the self-test.  
3. Replace H-RPT.  
Replace H-RPT.  
HRPT_SELF TEST ERROR  
05  
06  
A problem has been detected  
during the cyclic H-RPT self-test.  
ON  
HRPT_LTU CRC ALM: LP1  
HRPT_LTU CRC ALM: LP2  
A CRC-6 error has been detected If the number of CRC-6 errors is significant (more than a few ON  
in the input signal of the specified errors per hour), perform the following:  
HDSL line.  
1. Check the appropriate HDSL line from the H-RPT to the  
unit configured as remote.  
2. Perform a self-test on the unit configured as remote and  
replace the unit if it fails the self-test.  
3. Replace H-RPT.  
HRPT_NTU CRC ALM: LP1  
HRPT_NTU CRC ALM: LP2  
07  
08  
A CRC-6 error has been detected If the number of CRC-6 errors is significant (more than a few ON  
in the input signal of the specified errors per hour), perform the following:  
HDSL line.  
1. Check the HDSL lines to the remote unit.  
2. Perform a self-test on the unit configured as central and  
replace the unit if it fails the self-test.  
3. Replace H-RPT.  
HRPT ALARM BUFFER OVERFLOW  
More than 100 alarms entries  
have been written in the H-RPT  
alarm buffer since the last clear  
command. New alarms are  
overwriting the older alarms.  
Read the messages and then clear the buffer by sending the  
CLR ALM HRPT/A command from the control terminal.  
ON/OFF  
.
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You can manage the alarm buffer either from the control terminal, or from  
the LCD.  
Working with  
Alarm Buffer  
From the Control Terminal  
To display the active alarms from the control terminal, type DSP ALM. The  
terminal displays up to 100 alarms stored in the buffer, for each alarm listing  
its number, its state (ON or OFF), the date and the time when the last  
change in its state occurred. To clear the alarms, use the commands CLR  
ALM and CLR ALM REM. For more details, see description of the  
corresponding command in Section 4.5, HCD-E1 Command Set Description.  
From the LCD  
You can view the ON-state alarms stored in the alarm buffer, on the front  
panel LCD display, and delete the alarm messages from the buffer when no  
longer needed. This procedure is explained below.  
When the top row shows ALARM BUFFER, the second row displays the  
following information:  
During normal operation, the second row shows EMPTY (no alarm  
messages).  
If the alarm buffer contains ON-state alarms, the LCD shows SCROLL in  
the left-hand field of the second row, and CLEAR in the right-hand field.  
To display the alarms, bring the cursor to SCROLL, and then press ENTER:  
you can now scroll between the ON-state alarms stored in the alarm buffer.  
To interpret the alarm messages displayed in the second row, refer to  
Table 5-1.  
To correct the reported problem, perform the corrective actions in the given  
order, until the problem is resolved.  
To clear alarm messages from the HCD-E1 alarm buffer, act as follows:  
Step  
Action  
Key  
Display  
1
2
Display ALARM BUFFER in the first row.  
CURSOR  
CURSOR  
ALARM BUFFER  
Bring the cursor in the second row, to  
CLEAR.  
3
Press ENTER to clear the ON-type alarms  
and the alarm history in the alarm buffer.  
ENTER  
If no ON-state alarms are present, the  
second row should show EMPTY.  
This action is equivalent to the CLR ALM/A command (see Section 4.5,  
HCD-E1 Command Set Description, in Chapter 4).  
5-12  
Status Indications and Alarms  
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5.3 Performance Diagnostics Data  
HCD-E1 has two capabilities for collection of performance statistics: E1 and  
HDSL performance monitoring capability.  
General  
This section first describes the principles and parameters of the E1 and  
HDSL performance monitoring and then explains how to display  
performance data from the HCD-E1 front panel. For information on  
displaying the performance data from the control terminal, see Chapter 4.  
This section describes the performance evaluation and monitoring functions  
provided by HCD-E1 with respect to the user's traffic (on the E1 link  
between the DTE and the user’s port). The functions actually available  
depend on the use of the CRC-4 function: whether it is enabled or disabled.  
E1 Sublink  
Performance  
Monitoring  
Below are listed performance monitoring parameters with the CRC-4  
function enabled and disabled, followed by a summary table (Table 5-2)  
listing the displays of all these parameters on the HCD-E1 front panel in the  
order of their appearance, accompanied by a short description and ranges  
available.  
E1 Performance Monitoring with CRC-4 Function Enabled  
When the CRC-4 function is enabled, you are able to monitor the  
end-to-end data transmission performance. HCD-E1 derives information  
about errors from the E1 data payload by performing a cyclic redundancy  
check (CRC), and transmits the resulting CRC checksum in addition to the  
raw data bits.  
The receiving end recalculates the checksum and compares the results with  
the received checksum: any difference between the two checksums  
indicates that the current data block being evaluated contains bit errors.  
When the CRC-4 function is enabled, HCD-E1 stores E1 line statistics for the  
E1 port. This permits real-time monitoring of E1 data transmission  
performance.  
The performance monitoring parameters are listed below:  
Current CRC-4 error events (ERROR CRC)  
A CRC-4 error event is any multiframe containing a CRC error and/or  
OOF event. The number of CRC events in the current second is collected  
in a current CRC error events register.  
Current average CRC-4 errors (AV ERR CRC)  
The average number of CRC events per second. The average is updated  
every second.  
You can display the register contents at any time. When the CRC error events  
are displayed on the front-panel LCD, you can reset the register by pressing  
ENTER.  
Note  
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Current errored seconds (CURR ES)  
An errored second is any second containing one or more CRC error  
events, or one or more OOF events, or one or more controlled slip  
events. The data is collected for the current 15-minute interval.  
Current unavailable seconds (CURR UAS)  
An unavailable second is any second in which a failed signal state exists.  
A failed signal state is declared when 10 consecutive severely errored  
seconds (SES) occur, and is cleared after 10 consecutive seconds of data  
are processed without a SES.  
Current severely errored seconds (CURR SES)  
A SES is a second with 832 or more CRC error events, or one or more  
OOF events. The data is collected for the current 15-minute interval.  
Current bursty errored seconds (CURR BES)  
A BES is a second with 2 to 831 CRC error events. The data is collected  
for the current 15-minute interval.  
Current loss of frame counter (CURR LOFC)  
The loss of frame (LOF) counter counts the loss of frame alignment  
events. The data is collected for the current 15-minute interval.  
Current slip second counter (CURR CSS)  
A CSS is a second with one or more controlled slip events. The data is  
collected for the current 15-minute interval.  
Current seconds (CURR SECS)  
The number of seconds in the current measurement interval. A  
measurement interval has 900 seconds (15 minutes).  
This register is called “CURRENT TIMER” on the control terminal.  
Note  
HCD-E1 also provides support for long-term statistics gathered over the  
long-term interval (96 15-minute intervals, i.e., a total of 24 hours) for the E1  
port. The additional parameters included in this class are:  
Long-term errored seconds (L.TERM ES)  
The total number of ES in the current 24-hour interval.  
Long-term fail seconds (L.TERM UAS)  
The total number of UAS in the current 24-hour interval.  
Long-term severely errored seconds (L.TERM SES)  
The total number of SES in the current 24-hour interval.  
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Long-term bursty errored seconds (L.TERM BES)  
The total number of BES in the current 24-hour interval.  
Long-term loss of frame counter (L.TERM LOFC)  
The total number of LOF events in the current 24-hour interval.  
Long-term slip second counter (L.TERM CSS)  
The total number of CSS in the current 24-hour interval.  
Long-term interval (L.TERM INT)  
The number of valid 15-minute intervals in the previous 24 hour period.  
Current degraded minutes (CUR DEG MIN)  
The total number of degraded minutes in the current 24-hour interval. A  
degraded minute is a minute in which the bit error rate (BER) exceeded  
1×10-6. This number is updated every minute.  
Last degraded minutes (LST DEG MIN)  
The total number of degraded minutes in the last 24-hour interval. This  
number is updated every 24 hours.  
E1 Performance Monitoring with CRC-4 Disabled  
In this case HCD-E1 does not support the capabilities listed above, but is  
capable of gathering the number of bipolar violations measured during the  
last minute.  
The performance evaluation and monitoring parameters collected by the  
HCD-E1 when the CRC-4 function is disabled are listed below:  
Bipolar violations last minute count (BPV COUNT)  
The total number of bipolar violations counted in the last minute. This  
number is updated every minute.  
Bipolar violations worst count (BPV WORST)  
The number of bipolar violations counted in the worst minute since the  
last resetting of the BPV count. This number is updated every minute.  
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Table 5-3 gives a summary of the performance diagnostics data displayed  
under the header PORT DIAGNOSTICS on the HCD-E1 front panel.  
Summary of E1  
Performance  
Monitoring  
Table 5-3 Summary of E1 Performance Monitoring  
Display  
Description  
Range  
ERROR CRC  
The number of CRC error events recorded since the last time the register  
was cleared. The display is updated every second.  
0 - 1000  
AV ERR CRC  
CURR ES  
The average number of CRC error events recorded since the last time the 0 - 1000  
register was cleared. The display is updated every second.  
Number of ES measured during the current 15-minute interval. The  
display is updated every second.  
0 - 900  
0 - 900  
0 - 900  
0 - 900  
0 - 255  
0 - 255  
0 - 900  
CURR UAS  
CURR SES  
CURR BES  
CURR LOFC  
CURR CSS  
Number of UAS measured during the current 15-minute interval. The  
display is updated every second.  
Number of SES measured during the current 15-minute interval. The  
display is updated every second.  
Number of BES measured during the current 15-minute interval. The  
display is updated every second.  
Number of loss of frame synchronization events measured during the  
current 15-minute interval. The display is updated every second.  
Number of CSS measured during the current 15-minute interval. The  
display is updated every second.  
CURR SECS  
(CURRENT TIMER  
on the terminal)  
The time in seconds that expired from the start of the current 15-minute  
interval. The display is updated every second.  
L.TERM ES  
Number of ES measured during the current 24-hour interval. The display  
is updated every 15 minutes.  
0 - 65535  
0 - 65535  
0 - 65535  
0 - 65535  
0 - 255  
L.TERM UAS  
L.TERM SES  
L.TERM BES  
L.TRM LOFC  
L.TERM CSS  
L.TERM INT  
CUR DEG MIN  
Number of UAS measured during the current 24-hour interval. The  
display is updated every 15 minutes.  
Number of SES measured during the current 24-hour interval. The  
display is updated every 15 minutes.  
Number of BES measured during the current 24-hour interval. The  
display is updated every 15 minutes.  
Number of loss of frame synchronization events measured during the  
current 24-hour interval. The display is updated every 15 minutes.  
Number of CSS measured during the current 24-hour interval. The  
display is updated every 15 minutes.  
0 - 255  
The number of 15-minute intervals that expired from the start of the  
current 24-hour interval. The display is updated every 15 minutes.  
0 - 96  
Number of degraded minutes measured during the last 24 hours. The  
display is updated every minute.  
0 - 1440  
5-16  
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Table 5-3 Summary of E1 Performance Monitoring (Cont.)  
Display  
Description  
Range  
LST DEG MIN  
Last 24-hour count of degraded minutes. The display is updated every 24 0 - 1440  
hours.  
BPV COUNT  
BPV WORST  
The total number of BPV errors during the last minute The display is  
updated every minute.  
0 - 9999  
The number of BPV errors measured during the worst minute. The  
display is updated every minute.  
0 - 9999  
This section describes the performance evaluation and monitoring functions  
provided by HCD-E1 with respect to the HDSL transmission performance on  
each line.  
HDSL Performance  
Monitoring  
The HDSL performance monitoring parameters are listed below:  
Current errored seconds (ES)  
An errored second is any second containing one or more errored blocks,  
or the occurrence of a severely disturbed period (SDP). The data is  
collected for the current 15-minute interval.  
Current unavailable seconds (UAS)  
An unavailable second is any second in which a failed signal state exists.  
A failed signal state is declared when 10 consecutive severely errored  
seconds (SES) occur, and is cleared after 10 consecutive seconds of data  
are processed without a SES. The data is collected for the current 15  
minute interval.  
Current severely errored seconds (SES)  
A SES is a second with more than 30% errored blocks or one or more  
SDP's. The data is collected for the current 15-minute interval.  
Current background block error (BBE)  
A BBE is an errored block not occurring during an SES. The data is  
collected for the current 15-minute interval.  
Errored Seconds Ratio (ESR)  
The ratio of ES to the total seconds in the current 15-minute interval (not  
displayed on the LCD).  
Severely errored seconds ratio (SESR)  
The ratio of SES to the total seconds in the current 15-minute interval  
(not displayed on the LCD).  
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Background block error ratio (BBER)  
The ratio of BBE to the total seconds in the current 15-minute interval  
(not displayed on the LCD).  
Current seconds (SECS)  
The number of seconds in the current measurement interval. A  
measurement interval has 900 seconds (15 minutes).  
This register is called “CURRENT TIMER” on the control terminal.  
Note  
The same parameters are also available over 24-hour intervals (long-term  
statistics).  
Table 5-4 gives a summary of the performance diagnostics data displayed  
under HDSL DIAG: LINE1 or HDSL DIAG: LINE2 on the HCD-E1 front  
panel.  
Summary of HDSL  
Performance  
Monitoring  
Table 5-4 Summary of HDSL Performance Monitoring from the Front Panel  
Display  
Description  
Range  
CURR ES  
Number of ES measured during the current 15-minute interval. The  
display is updated every second.  
0 - 900  
CURR UAS  
CURR SES  
CURR BBE  
CURR SECS  
Number of UAS measured during the current 15-minute interval. The  
display is updated every second.  
0 - 900  
0 - 900  
0 - 900  
Number of SES measured during the current 15-minute interval. The  
display is updated every second.  
Number of BBE measured during the current 15-minute interval. The  
display is updated every second.  
The time in seconds that expired from the start of the current 15-minute 0 - 900  
(CURRENT TIMER on interval. The display is updated every second.  
the terminal)  
L.TERM ES  
Number of ES measured during the current 24-hour interval. The  
display is updated every 15 minutes.  
0 - 65535  
0 - 65535  
0 - 65535  
0 - 65535  
0 - 96  
L.TERM UAS  
L.TERM SES  
L.TERM BBE  
L.TERM INT  
Number of UAS measured during the current 24-hour interval. The  
display is updated every 15 minutes.  
Number of SES measured during the current 24-hour interval. The  
display is updated every 15 minutes.  
Number of BBE measured during the current 24-hour interval. The  
display is updated every 15 minutes.  
The number of 15-minute intervals that expired from the start of the  
current 24-hour interval. The display is updated every 15 minutes.  
5-18  
Performance Diagnostics Data  
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To display the E1 and HDSL performance diagnostics data on the HCD-E1  
front-panel LCD, use the following procedure:  
Displaying the  
Performance  
Data on the  
Front-Panel LCD  
Step Action  
Key  
Result  
1
2
3
4
Bring the cursor to the left-hand field of  
the top row (if it is not already there).  
CURSOR  
Scroll to display PORT DIAG: SL in the top SCROLL  
row.  
Bring the cursor to the left-hand field in  
the second row  
CURSOR  
The second row shows the first E1  
performance item and its current value.  
Scroll to see the other E1 performance  
statistics  
SCROLL  
After each pressing of SCROLL, the second  
row shows the current value of the next  
item. Continue until the first item appears  
again.  
5
6
Bring the cursor to the left-hand field of  
the top row (if not already there).  
CURSOR  
SCROLL  
Scroll to display HDSL DIAG in the top  
row.  
The right-hand field of the top row  
indicates LINE1, meaning that the  
displayed diagnostics data pertains to  
line 1. Second row shows the first  
performance item for line 1 and its current  
value.  
7
8
Bring the cursor to the left-hand field in  
the second row.  
CURSOR  
SCROLL  
Scroll to see the other statistics.  
After each SCROLL pressing, the second  
row shows the current value of the next  
item. Continue until the first item appears  
again.  
9
Bring the cursor to the right-hand field of  
the top row (if it is not already there).  
CURSOR  
SCROLL  
SCROLL  
10  
11  
Scroll to display LINE2.  
Second row shows the first performance  
item for line 2 and its current value.  
Repeat steps 7 and 8 above to see the  
other statistics of line 2.  
After each pressing of SCROLL, the second  
row shows the current value of the next  
item. Continue until the first item appears  
again.  
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Resetting the Performance Data Registers  
The registers storing diagnostics data can be reset. To reset a register, bring  
the register to display and press ENTER. To ensure that the collected data  
remains meaningful and correlated after a specific register is reset, HCD-E1  
will automatically perform the following actions.  
For E1 Registers:  
When the CRC-4 function is enabled:  
Since the data collected for the current interval and for the current  
24-hour interval is correlated, pressing ENTER while any of the  
following CURR or L.TERM data items (ES, UAS, SES, BES, LOFC,  
CSS, CURR SECS, CUR DEG MIN, LST DEG MIN, and L.TERM INT)  
is displayed, clears all the performance diagnostics registers, not only  
the one appearing on the display.  
Resetting the ERROR CRC register automatically resets the AV ERR  
CRC register, and vice versa: resetting the AV ERR CRC register  
automatically resets the ERROR CRC register.  
When the CRC-4 function is disabled, resetting the BPV COUNT register  
automatically resets the BPV WORST register, and vice versa: resetting  
the BPV WORST register automatically resets the BPV COUNT register.  
For HDSL Registers:  
When you press ENTER, all the HDSL performance registers that pertain to  
the line whose number is displayed in the right-hand field of the top row are  
simultaneously reset.  
You can display the performance data on the control terminal by means of  
the DSP SL PM, DSP R SL PM, DSP HDSL PM, and DSP R HDSL PM  
commands, as explained in Chapter 4. By adding the /C switch to the  
DSP SL PM and DSP R SL PM commands, you can reset the CRC ERROR  
EVENTS and CRC AVG ERR EVENTS registers for the E1 sublink of the  
appropriate (local or remote) unit. By adding the /CA switch to the  
command, you can reset all the performance diagnostics registers.  
Displaying the  
Performance Data  
on a Control  
Terminal  
5-20  
Performance Diagnostics Data  
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5.4 Diagnostic Tests  
The user-controlled test functions of HCD-E1 consist of the following  
diagnostic loopback tests:  
Diagnostic  
Loopbacks  
Terminal  
Command  
Designation on the LCD  
Loopback Description  
Second Row  
LOCAL LINE  
LOCAL HRPT  
LOCAL PORT  
REM PORT  
Top Row  
(Right)  
Loopback (local) on the two HDSL lines towards the  
DTEs connected to your HCD-E1  
LOOP L LINE  
LOOP L HRPT  
LOOP L SL  
ML  
HRPT  
SL  
Local loopback on the H-RPT repeater towards the  
HCD-E1 unit configured as central  
Loopback (local) on the E1 sublink of the local towards  
the DTE connected to it  
Loopback (remote) on the E1 sublink of the local  
HCD-E1 towards the DTE connected to the E1 sublink  
of the remote HCD-E1  
LOOP R SL  
SL  
Loopback (remote remote) on the E1 sublink of the  
remote unit, towards the DTE connected to the E1  
sublink of the local HCD-E1  
LOOP R R SL  
REM REM PORT  
SL  
Loopback (local) on the data channel X of the local  
HCD-E1 towards the DTE connected to it  
LOOP L CH X  
LOOP R CH X  
LOCAL CH  
REM CH  
CHX  
CHX  
Loopback (remote) on the data channel X of the local  
HCD-E1 towards the DTE connected to this channel of  
the remote HCD-E1  
Loopback (remote remote) on the data channel X of the LOOP R R CH X  
remote HCD-E1 towards the DTE connected to this  
channel of the local HCD-E1  
REM REM CH  
INBAND LOOP  
BERT  
CHX  
CHX  
CHX  
In-band activated loopback on data channel X of the  
LOOP INBAND  
remote unit towards the DTE connected to this channel CH X  
of the local HCD-E1  
BER testing on the data channel  
LOOP BERT  
CH X  
You can access these loopbacks from the TEST OPTION menu.  
The following paragraphs describe the loopbacks identified by the  
supervision terminal command.  
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LP L LINE  
These local loopbacks on the HDSL lines are performed in the HDSL framer,  
as shown in Figure 5-1. Test signal is provided either by the equipment  
connected to one of the inputs, which must receive its own transmissions  
without errors, or by applying the BERT test.  
This test fully checks the connections to the equipment connected to the  
local E1 sublink and/or data channels, as well as the circuits of the local unit.  
Figure 5-1 LP LINE Loopback  
1. This loopback can be activated only from the unit configured as central.  
2. While this loop is active, HCD-E1 loses HDSL synchronization.  
Notes  
LP L HRPT  
This local loopback on the HDSL repeater is performed as shown in  
Figure 5-2. The loopback can be performed only from the HCD-E1 unit  
configured as central.  
This test fully checks the connections to the equipment connected to the  
local E1 sublink and/or data channels of the HCD-E1 unit configured as  
central, all the circuits of both HCD-E1 and H-RPT, and the transmission  
path connecting the two units.  
During the loopback, the remote unit continues to receive data sent from  
the central unit.  
Figure 5-2 H-RPT Local Loopback  
5-22  
Diagnostic Tests  
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LP L SL  
This local loopback towards the E1 sublink of the local HCD-E1 is performed  
by connecting the E1 sublink input signal (input to HCD-E1) to the output of  
the sublink from HCD-E1, as shown in Figure 5-3. The test signal is provided  
by the equipment connected to the E1 sublink of the local HCD-E1, which  
must receive its own transmission without errors while the loopback is  
activated.  
This test fully checks the connections to the equipment connected to the E1  
sublink of the local HCD-E1. During the loopback, the local HCD-E1  
continues sending data from the DTE connected to its E1 sublink, over the  
HDSL link.  
Figure 5-3 LP L SL Loopback  
LP R SL  
This remote loopback towards the DTE connected to the E1 sublink of the  
remote HCD-E1 is performed by connecting the sublink transmit signal  
(output from HCD-E1) to the sublink receive path (input from HCD-E1)  
within the sublink line interface circuits, as shown in Figure 5-4. The test  
signal is provided by the equipment connected to the E1 sublink of the  
remote HCD-E1, which must receive its own transmission without errors  
while the loopback is activated.  
This test checks the connections to the equipment connected to the E1  
sublink of the remote HCD-E1, all the circuits of the local and remote  
HCD-E1, and the transmission path connecting the two units.  
Remote Unit  
HDSL Line A  
Local HCD-E1  
Tx  
Rx  
Tx  
HDSL Line A  
Interface  
HDSL Line A  
Interface  
E1  
E1 Interface  
Rx  
Tx  
User  
Interface  
Processing  
Processing  
HDSL Line B  
Ch1  
Ch2  
Rx  
Tx  
Data  
Interface  
HDSL Line B  
Interface  
HDSL Line B  
Interface  
Rx  
Figure 5-4 LP R SL Loopback  
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During the loopback, the DTE connected to the E1 sublink of the local  
HCD-E1, continues to receive data.  
LP R R SL  
This remote remote loopback towards the DTE connected to the E1 sublink  
of the local HCD-E1 is performed by connecting the transmit signal of the E1  
sublink of the remote unit (output from the remote HCD-E1) to the input of  
its receive path (input from the remote HCD-E1) within the sublink line  
interface circuits, as shown in Figure 5-5. The test signal is provided by the  
equipment connected to the E1 sublink of the local HCD-E1, that must  
receive its own transmission without errors while the loopback is activated.  
Figure 5-5 LOOP R R SL Loopback  
This test checks the connections to the equipment connected to the E1  
sublink of the local HCD-E1, all the circuits of the remote unit, the functions  
of the remote and local units, and the transmission path between them.  
During this loopback, the DTE connected to the E1 sublink of the remote  
HCD-E1 continues to receive data.  
The following loopbacks (LP L CH, LP R CH, LP R R CH and LP INBAND CH)  
are not recommended for HCD-E1 channel with Ethernet interface. Although  
a channel loopback is not forbidden in principle, it may cause a state of  
permanent collision on the LAN (this would prevent other users from using  
the LAN as long as the loopback is connected).  
Note  
LP L CH X  
This local loopback on the data channel X of the local HCD-E1 (X can be 1  
or 2) is performed by connecting the data channel transmit signal to the  
input of the receive path, as shown in Figure 5-6. The test signal is provided  
by the DTE connected to this channel of the local HCD-E1, which must  
receive its own transmission without errors while the loopback is activated.  
During the loopback, this channel of the local HCD-E1 continues sending  
the user's data to the link.  
This test mainly checks the connections to the local data channel interface.  
5-24  
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Figure 5-6 LP L CH 1 Loopback  
LP R CH X  
This remote loopback towards the DTE connected to data channel X of the  
remote HCD-E1 (X can be one or two) is performed by connecting the local  
data channel receive signal to its transmit input, as shown in Figure 5-7 for  
the loop on channel 1. The test signal is provided by the DTE connected to  
the data channel of the remote HCD-E1, which must receive its own  
transmission without errors while the loopback is activated.  
Figure 5-7 LP R CH 1 Loopback  
This test fully checks the user data link, including the cables connecting the  
DTE to the remote unit, the transmission path connecting the two units and  
the circuits of the local HCD-E1. During the loopback, the DTE connected  
to the tested data channel of the local HCD-E1 continues to receive data.  
LP R R CH  
This remote remote loopback towards the DTE connected to the data  
channel of the local HCD-E1, is performed by connecting the transmit signal  
of this data channel of the remote HCD-E1 to the input of its receive path  
within the data channel interface circuits, as shown in Figure 5-8 for the loop  
on channel 1. The test signal is provided by the DTE connected to the data  
channel of the local HCD-E1, which must receive its own transmission  
without errors while the loopback is activated.  
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This test checks the connections to the DTE connected to the data channel  
of the local HCD-E1, all the circuits of the remote unit, the functions of the  
remote unit and local HCD-E1, and the transmission path connecting the  
two units. During the loopback, the DTE connected to the tested channel of  
the remote unit continues to receive data.  
Figure 5-8 LP R R CH 1 Loopback  
LP INBAND CH X  
The in-band activated channel loopback (see Figure 5-9) is similar to the  
channel data remote remote loopback, except for the way it is connected.  
This loopback is activated and deactivated by transmitting special sequences  
for approximately two seconds, in contrast to the LP R R CH loopback,  
where the command arrives with e.o.c.  
Figure 5-9 LP INBAND CH 1 Loopback  
LP BERT CH X  
BER testing (see Figure 5-10) does not represent a loopback in itself; to be  
performed, it requires one of the channel or line loopbacks to be already  
activated, towards your BERT.  
BER testing can be performed on one channel at a time. To perform the test  
over the whole link, end-to-end, you may use the LP R R CH loopback on  
the same channel; for a local test, use the LP L LINE loopback.  
5-26  
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REMOTE UNIT  
HDSL Line A  
LOCAL HCD-E1  
Tx  
Rx  
HDSL Line A  
Interface  
HDSL Line A  
Interface  
Rx  
E1  
E1 Interface  
BERT  
CH1  
Data  
Interface  
Processing  
Processing  
HDSL Line B  
Tx  
Rx  
Tx  
Data  
Interface  
HDSL Line B  
Interface  
HDSL Line B  
Interface  
Tx  
Rx  
CH2  
BERT  
Figure 5-10 LP R R CH 1 Loopback + LP BERT CH 1  
During the test, the local data channel is disconnected, the DSR line is off;  
an internal pattern generator connects a user-selected test sequence to the  
transmit input of the local data channel interface. To calibrate the system,  
you can inject errors at a selectable rate.  
The receive output is connected to a pattern evaluator. The evaluator  
compares the received and transmitted patterns and detects errors. The test  
results are presented as follows:  
On the supervision terminal, detailed full data is displayed, including  
information on factors such as the number of seconds during which  
HCD-E1 lost frame synchronization (see the DSP BERT command in  
Chapter 4).  
On the LCD, the result appears as GOOD (no errors) or BAD (at least  
one error has been detected during the BER measurement interval). For  
more details, see “Operating BERT from the Front Panel” below.  
Before starting the execution of a test, pay attention to the following points:  
Operating  
Loopbacks from  
the Front Panel  
At any time, you can connect only one loopback on the E1 sublink, and  
one on each channel.  
If a loopback is already connected, the TST indicator lights. If you try to  
connect a loopback while another loopback of the same type is already  
connected, HCD-E1 displays an error message.  
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To activate or deactivate a specific test, use the following procedure:  
Step  
Action  
Key  
Result  
1
Bring the cursor to the left-hand field in  
the top row (if it is not already there).  
CURSOR  
2
Scroll to display TEST OPTION in the  
top row.  
SCROLL  
The right-hand field of the top row may  
show OFF (in this case the second row  
is empty), SL, ML, CH1, CH2, or HRPT.  
OFF indicates that either no test is  
currently active or a test is active but  
can be deactivated. CH1, CH2, SL, ML,  
or HRPT indicates that a test is currently  
active (in this case the TST LED lights),  
or enabled.  
3
4
To enable the activation of the E1  
sublink test, bring the cursor to the  
right-hand field in the top row, and  
scroll to display SL.  
CURSOR,  
SCROLL  
The second row displays the first test  
option: LOCAL PORT.  
Bring the cursor to the left-hand field in  
the second row, and scroll to display the SCROLL  
desired type of loopback:  
CURSOR,  
The second row shows the current state  
of the selected test, OFF or ON.  
LOCAL PORT (E1 sublink local  
loopback)  
REM PORT (E1 sublink remote  
loopback)  
REM REM PORT (E1 sublink remote  
remote loopback)  
5
6
To enable the activation of the main link CURSOR,  
The second row displays LOCAL LINE.  
test, bring the cursor to the right-hand  
field in the top row, and scroll to display  
ML.  
SCROLL  
To enable the activation of CH X  
loopbacks, bring the cursor to the  
right-hand field in the top row and scroll  
to display the desired number of  
channel CH1 or CH2.  
CURSOR  
SCROLL  
The second row displays the first test  
option: LOCAL CH  
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Step  
Action  
Key  
Result  
7
Bring the cursor to the left-hand field in  
the second row, and scroll to display the SCROLL  
desired type of loopback:  
CURSOR,  
The second row shows the current state  
of the selected test, OFF or ON.  
LOCAL CH (data channel local  
loopback)  
REM CH (data channel remote  
loopback)  
REM REM CH (data channel remote  
remote loopback)  
BERT (BERT test)  
INBAND LOOP (in-band loopback)  
8
To enable the activation of the H-RPT  
loop (available only for HCD-E1  
configured as central), bring the cursor  
to the right-hand field in the top row,  
and scroll to display HRPT.  
CURSOR,  
SCROLL  
The second row displays LOCAL HRPT.  
9
To change the test state, bring the  
cursor to the right-hand field in the  
second row, and scroll to display the  
desired state (ON or OFF).  
CURSOR,  
SCROLL  
The second row shows the new state of  
the selected test (for instance, ON).  
10  
Press ENTER to activate or deactivate  
the displayed test.  
The TST indicator lights if the test is  
activated, or goes off if no more tests  
are active.  
To deactivate all the tests activated from this unit, simultaneously, perform  
steps 1, 2, 3 above: in step 3 select OFF, and then press ENTER. The  
TST LED should turn off.  
To activate the BERT test, you must first select the BERT parameters for the  
appropriate channel (see Table 3-6 in Chapter 3 for the LCD menu  
description and the DEF BERT command in Chapter 4 for additional  
information). You must also remember that you can perform this test only on  
a connected channel (at least one HDSL time slot must be assigned to this  
channel).  
Operating BERT  
from the Front  
Panel  
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To display the current parameter values, and change them as necessary, use  
the following procedure:  
Step  
Action  
Key  
Result  
1
Check/configure your channel according to  
Chapter 3 (see Checking the Current  
Operating Configuration in Section 3.5 or  
General Configuration Procedure in  
Section 3.6).  
2
Bring the cursor to the left-hand field in the  
top row (if it is not already there).  
CURSOR  
SCROLL  
3
4
Scroll to display BERT PRM in the top row.  
Move the cursor to the right-hand field and  
scroll to display the desired channel.  
CURSOR,  
SCROLL  
The right-hand field of the top row  
shows CH1 or CH2  
5
6
7
8
Bring the cursor to the left-hand field in the  
second row, and scroll to display PATTERN.  
CURSOR,  
SCROLL  
The right-hand field in the second  
row displays the current value.  
Move the cursor to the right-hand field and  
scroll to display the desired pattern.  
CURSOR,  
SCROLL  
Bring the cursor to the left-hand field in the  
second row, and scroll to display ERR RATE. SCROLL  
CURSOR,  
The right-hand field in the second  
row displays the current value.  
Move the cursor to the right-hand field and  
scroll to display the desired error rate. For  
selection, consult Table 3-6 in Chapter 3  
and DEF BERT command in Chapter 4.  
When done, press ENTER.  
CURSOR,  
SCROLL  
ENTER  
9
Prior to activating the BERT test on the data  
channel, activate one of the following  
loopbacks: LP R R CH on the selected  
channel, LP LOCAL LINE, or LP L HRPT (if  
your HCD-E1 is configured as central), as  
described in the above section (Operating  
Loopbacks from the Front Panel).  
The TST indicator lights up.  
10  
11  
Bring the cursor to the left field of the top  
row and scroll to display TEST OPTION.  
CURSOR,  
SCROLL  
Bring the cursor to the right field in the top  
row, and scroll to display your channel  
number (CH1 or CH2).  
CURSOR,  
SCROLL  
12  
13  
Bring the cursor to the left field of the  
second row and scroll to display BERT.  
CURSOR,  
SCROLL  
Bring the cursor to the rightmost field of in  
the second row , select ON and press  
ENTER to perform the BERT test.  
CURSOR,  
SCROLL,  
ENTER  
In the middle field of the second  
row, HCD-E1 displays the test result:  
BAD or GOOD.  
14  
15  
To inject errors, press ENTER (to make sure  
that error injection is enabled, see step 8).  
ENTER  
GOOD turns to BAD and the letter I  
appears next to it.  
If you want to repeat error injections,  
perform step 14.  
ENTER  
BAD turns to GOOD, and the letter I  
next to it disappears.  
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Step  
Action  
Key  
Result  
16  
To deactivate the BERT test, scroll to OFF  
and press ENTER.  
ENTER  
17  
Deactivate the loopback on the appropriate  
channel as described in the previous section.  
The diagnostic loopbacks can be operated by means of a control terminal,  
using the LOOP and CLR LOOP commands. For more detail, see  
description of the corresponding command in Section 4.5, HCD-E1  
Command Set Description.  
Operating  
Loopbacks from a  
Control Terminal  
5.5 Configuration Error Messages  
If HCD-E1 detects a configuration mismatch, it displays an appropriate  
configuration error message. These messages appear both on the LCD and  
on the supervision terminal. Some of the messages are not available on the  
LCD. There is also one unavailable on the supervision terminal.  
On the control terminal, configuration error messages have the format  
ERROR, followed by a two-digit code and a short description of the error  
message after the error code. The LCD displays CONFIG ERROR followed  
by the error two-digit code, without description. Table 5-5 lists the  
configuration error messages in order of their codes and explains each of  
them. Messages not available on the LCD are marked with an asterisk (*).  
Table 5-5 Configuration Error Messages  
Error Code  
Terminal Message and Description  
ERROR 01  
ILLEGAL LOOP COMBINATION  
You are trying to activate illegal combination of loopbacks.  
LOOP IS NOT ACTIVE  
ERROR 02*  
ERROR 03  
You are trying to disconnect a loopback that is not active.  
ILLEGAL COMMAND FOR CURRENT PORT MODE  
You are trying to perform a command, which is illegal for the current configuration. For  
example, you are trying to display the E1 sublink performance diagnostics while the  
CRC-4 function is disabled, or you are attempting to configure remote HCD-E1, when  
it is under control of central unit (CONFIG_REM parameter of the central unit is set to  
YES) and the HDSL line is synchronized.  
ERROR 04  
On LCD only:  
You are trying to change a parameter from the front panel when the password  
protection is enabled  
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Table 5-5 Configuration Error Messages (Cont.)  
Error Code  
Terminal Message and Description  
ERROR 05  
MASTER AND FALLBACK CLOCK ARE THE SAME  
You are trying to select the same source as both master and fallback clock source.  
Check and change as required.  
ERROR 06  
ILLEGAL NUMBER OF TIME SLOTS SELECTED  
The total number of high priority time slots selected exceeds the maximum (16 time  
slots) allowed  
ERROR 07*  
ERROR 08  
ILLEGAL NODE NUMBER  
You are trying to select a node with number greater than 255.  
ILLEGAL SPEED FOR CURRENT AUXILIARY DEVICE  
The AUTO (Autobaud) mode cannot be selected when the supervisory port is to  
support the SLIP protocol (AUX DEV parameter is set to NMS-SLIP).  
ERROR 09  
ERROR 10  
DIFFERENT DEDICATED TS ALLOCATION  
You are trying to select different time slots of main link and sublink for dedicated time  
slot, and dedicated timeslot of sublink is not TS-0.  
CONFLICT IN SPEED PARAMETER  
The number of time slots currently allocated to a data channel or sublink is not equal  
to the number of time slots required to support the nominal data rate configured for  
this channel/sublink under SPEED or NUM OF TS parameter. Check and change as  
required.  
ERROR 11  
ERROR 12  
ILLEGAL TIME SLOT ALLOCATION  
At least one main link time slot is being assigned to more than one user (for example to  
the sublink and one of the channels). Check the dedicated time slot assignment, as  
well as time slot assignment for each channel and for the E1 sublink, with particular  
attention to automatic assignments (SEQ and ALT modes).  
TIME SLOT OUT OF RANGE  
When using the SEQ or ALT mapping mode, the sum of the number of time slots  
requested for a data channel (or sublink) and the starting time slot for that channel (or  
sublink) exceeds 31. Check and change as required.  
ERROR 13  
ERROR 14  
ERROR 15  
CONFLICT BETWEEN CLOCK MODE AND FIFO SIZE  
FIFO size can be other than AUTO only if the clock mode of the data channel is DTE2.  
ILLEGAL UNFRAMED CONFIGURATION  
For working in unframed mode, all the 32 time slots must be assigned.  
INVALID MASTER CLOCK SOURCE  
The channel you are trying to select as the fallback clock source is either not  
connected, or its clock mode is not DTE2. Check and change as required.  
ERROR 16  
INVALID FALLBACK CLOCK SOURCE  
The channel you are trying to select as the master clock source is either not connected,  
or its clock mode is not DTE2. Check and change as required.  
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Table 5-5 Configuration Error Messages (Cont.)  
Error Code  
Terminal Message and Description  
ERROR 17  
TS 0 IS MAPPED TO G732N FRAME TYPE  
You are trying to assign TS 0 for the G732N frame type  
Reserved for future use.  
ERROR 18  
ERROR 19  
ILLEGAL PARAMETER FOR CURRENT CONFIGURATION  
You are using a parameter which is not supported by this HCD-E1 version or  
configuration.  
ERROR 20  
LOOP IS ACTIVE, CAN’T UPDATE HARDWARE  
When a test or loopback is active, it is not possible to change the HCD-E1 operating  
mode in accordance with the updated configuration parameters. You may see this  
message either after pressing ENTER, or after an update data base command has been  
received through the supervisory port (or in-band management). You must first  
deactivate the test or loopback.  
ERROR 21  
ERROR 22  
CAN’T PERFORM LOOP - CHANNEL NOT CONNECTED  
The channel on which you are trying to perform a loop has no time slots assigned to it.  
CAN’T PERFORM LOOP - PORT NOT CONNECTED  
You are trying to activate a loopback on an E1 sublink which is not connected (no E1  
time slots are mapped to HDSL frame).  
ERROR 23  
ERROR 24  
CAN’T DISCONNECT - LOOP IS ACTIVE  
You are trying to disconnect a channel while a loop on this channel is currently active.  
CURRENT LOOP IS ALREADY BEING PERFORMED  
You are trying to perform a loop which is currently active.  
ILLEGAL COMMAND, LINK IN UNFRAMED MODE  
You are trying to set time slot priority bumping while the link is in unframed mode.  
CHANNEL BERT LOOP IS NOT ACTIVE  
ERROR 25  
ERROR 26*  
You are trying to activate the DSP BERT CH command, while the channel BERT test is  
not active.  
ERROR 27*  
ERROR 28*  
YEAR SHOULD BE IN THE RANGE 1996-2095  
You are trying to select an invalid number for the year.  
ILLEGAL DCD_DEL AND INTERFACE COMBINATION  
You are trying to select a non-zero DCD DELAY, while the HCD-E1 supervisory port  
interface has been set as DCE.  
ERROR 29*  
CONFLICT IN INTERFACE AND DSR PARAMETERS  
You selected DSR=ON, while the supervisory port interface has been set to DTE. The  
DSR=ON selection is valid only for DCE interface.  
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Configuration Error Messages  
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5.6 Power-Up Self-Test  
HCD-E1 performs a power-up self-test upon turn-on. The self-test sequence,  
described in Section 3-5, tests the critical circuit functions and the display.  
In case of failure, HCD-E1 displays an appropriate message in the second  
row.  
5.7 Troubleshooting  
In case a problem occurs, check the displayed alarm messages and refer to  
Table 5-1 and the entire Section 5-2 for their interpretation. If the trouble  
cannot be corrected by performing the actions listed in Table 5-1, use  
Table 5-6 to identify the trouble symptoms. Perform the actions listed under  
“Corrective Measures” in the order given in the table, until the problem is  
corrected.  
Table 5-6 Troubleshooting Chart  
No. Trouble Symptoms Probable Cause  
Corrective Measures  
1
HCD-E1 is “dead”.  
No power  
Check that both ends of the power cable are  
properly connected, and that the POWER switch is  
ON.  
If HCD-E1 is powered from DC, check the polarity of  
the power connections.  
Blown fuse  
(AC version only)  
Disconnect power cable from both ends and replace  
the fuse with another fuse of proper rating.  
Defective HCD-E1  
External problem  
Replace HCD-E1.  
2
One or both HDSL  
LOS LINE indicators  
light  
Check that the remote unit and H-RPT (if there is  
one) are operating.  
Check for proper connection of the pairs connecting  
between the local and the remote units.  
Check the loop resistance of the pairs and make sure  
the resistance does not exceed the design values.  
You may also use a transmission measurement set to  
check that loop attenuation is within the allowed  
limits.  
Defective HCD-E1  
Perform a power-up self-test and replace HCD-E1 if  
it fails the test.  
5-34  
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Table 5-6 Troubleshooting Chart (Cont.)  
No. Trouble Symptoms Probable Cause  
Corrective Measures  
3
E1 LOS LOC indicator External problem  
lights (sublink loses  
frame  
Check the cable connected to the E1 equipment.  
Perform the physical loop on the sublink while the  
E1 equipment connected to the sublink of the  
remote HDSL unit continues to send data towards  
the local unit. If the E1 LOS LOC indicator turns off,  
check the equipment connected to the sublink of the  
local unit.  
synchronization).  
Defective HCD-E1  
Perform a power-up self-test and replace HCD-E1 if  
it fails the test.  
4
5
E1 LOS REM indicator Problem at remote end Perform the LOOP L SL test. If the E1 LOS REM  
lights (the equipment  
connected to the E1  
sublink reports loss of  
synchronization).  
of the E1 sublink  
indicator turns off, check the cable connected to the  
E1 equipment and the equipment itself.  
Defective HCD-E1  
Cable problem  
Perform power-up self-test and replace HCD-E1 if it  
fails the test.  
The DTE connected  
to the local unit’s  
sublink or data  
channel does not  
receive data  
Activate the local sublink or local channel loopback.  
If the DTE does not receive its own transmission,  
check the cable connecting it to the HCD-E1 sublink  
or data channel connector.  
Defective DTE  
Check the DTE.  
Defective HCD-E1  
Perform a power-up self-test and replace HCD-E1 if  
it fails the test.  
01/01/01 08:15  
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Troubleshooting  
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Appendix C  
IR-ETH Interface Module  
C.1 General Description  
IR-ETH is an interface module for RAD modems, used for converting the  
Ethernet (10BaseT or 10Base2) electrical levels to the modem TTL levels. It  
also converts the Ethernet protocol to HDLC to enable long-distance  
transmission and avoid the Ethernet collision limitation.  
IR-ETH includes an internal, self-learning Ethernet bridge, which enables a  
high performance link between two Ethernet segments at a low transmission  
rate. The low-speed HDLC transmission is sent over the link using the  
modem modulation technique, and then converted back to an Ethernet  
signal at the remote modem.  
Figure C-1 shows a typical application using an Ethernet interface bridge.  
Each modem is connected to an Ethernet network via the Ethernet Interface  
bridge.  
HCD-E1  
HCD-E1  
Figure C-1 Typical Application of HCD-E1 with IR-ETH Module  
General Description C-1  
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Appendix C - IR-ETH Interface Module  
HCD-E1 Installation & Operation Manual  
C.2 IR-ETH Connector Options  
Figure C-2 and Figure C-3 show the rear panel of HCD-E1 with the IR-ETH  
connector options.  
RX OUT  
TX IN  
SUB E1  
P
O
W
E
10BASE-T  
TX  
RX  
COLL  
LINK  
CH.2  
CH.1  
R
CHANNEL  
HDSL  
LINE B  
NETWORK  
LINE A  
5
1
2
4
CH.1  
ALM RLY  
Figure C-2 HCD-E1 Rear Panel for the 10BaseT Option  
RX OUT  
TX IN  
SUB E1  
P
10BASE-T  
O
W
E
COLL  
TX  
RX  
CH.2  
CH.1  
R
CHANNEL  
HDSL  
NETWORK  
LINE A  
LINE B  
5
1
2
4
CH.1  
ALM RLY  
Figure C-3 HCD-E1 Rear Panel for the 10Base2 Option  
To connect the external equipment to the Ethernet interface, use standard  
Ethernet cables with RJ-45 or BNC connector, respectively.  
C.3 Technical Specifications  
LAN Table  
10,000 addresses  
15,000 pps  
General  
Filtering and  
Forwarding  
Buffer  
256 frames  
Delay  
1 frame  
Standard  
Data Rate  
Connectors  
Conforms to IEEE 802.3/Ethernet  
10 Mbps (20 Mbps 10BaseT FDX)  
LAN  
10BaseT (UTP): Shielded RJ-45  
10Base2: BNC connector  
Protocol (internal)  
Data Rate  
HDLC  
WAN  
According to the modem transmission rate  
C-2  
Technical Specifications  
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Appendix C - IR-ETH Interface Module  
C.4 Installation and Operation  
Figure C-4 and Figure C-5 show the Ethernet bridge rear panel components  
for the 10BaseT and the 10Base2 versions, respectively. Figure C-6 shows  
the location of the LED and the DIP switch.  
View A  
Figure C-4 IR-ETH Module Layout (10BaseT Option)  
View A  
Figure C-5 IR-ETH Module Layout (10Base2 Option)  
31/12/2000 17:57  
Installation and Operation  
C-3  
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Appendix C - IR-ETH Interface Module  
HCD-E1 Installation & Operation Manual  
View A  
4
3
2
1
Figure C-6 IR-ETH Module (View A)  
The Ethernet with UTP (10BaseT) connectors is designated as a Station. For  
10BaseT installation, either a straight cable or a cross-cable may be required.  
Use a cross-cable when connecting to a port that does not implement the  
crossover function internally. Otherwise, use a straight cable. (Hubs usually  
do implement the crossover function internally while network interface cards  
and other devices do not).  
LAN Installation  
Table C-1 lists pinout of the IR-Ethernet RJ-45 connector.  
Table C-1 RJ-45 Pinout  
Pin  
1
Name  
TD (+)  
TD (-)  
Function  
Transmit data positive  
Transmit data negative  
Receive data positive  
Receive data negative  
2
3
RD (+)  
RD (-)  
6
Table C-2 describes functions and default settings of the DIP switch SW-1  
sections. Function of section 1 is software-controlled, either from the  
supervision terminal (DEF CH command), or from the front panel  
(CHANNEL PRM). Its hardware switch is permanently set to OFF and is not  
allowed for manual setting. Sections 2 and 3 are set in accordance with  
Table C-2.  
Switch Settings  
The DIP switch is on the reverse side of the Ethernet bridge. To change the  
switch settings, you must undo three screws on the board and detach it from  
the main unit.  
C-4  
Installation and Operation  
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Appendix C - IR-ETH Interface Module  
Table C-2 DIP Switch Settings  
Section Number  
Name  
SQ/FD  
CMP  
FIL  
Description  
Default  
Setting  
1
2
3
4
Controls Ethernet mode: full-duplex or half-duplex.  
Permanently  
OFF  
ON: Strips padding bits inserted in 64-byte frame  
OFF: Transmits frames over WAN as is  
OFF  
OFF  
ON: Passes only frames destined for another LAN  
OFF: Disables LAN filter; passes all frames transparently  
(nc)  
Set the DIP switch, section 3 to ON if you want to filter the traffic sent to the  
remote end (recommended).  
Note  
If you want to disable the LAN filter, remove resistor R 45 from the Ethernet  
bridge and set section 3 to OFF.  
To control Ethernet mode (full-duplex or half-duplex), use DEF CH command  
on the terminal or CHANNEL PRM menu on the LCD.  
Table C-3 lists the IR-ETH LED indicators and describes their functions.  
LED Indicators  
Table C-3 IR-ETH Bridge LED Indicators  
LED  
Name  
Description  
Location  
Color  
Green  
Yellow  
LINK  
COLL  
RX  
ON indicates good link integrity (available only  
in the 10BaseT version)  
Rear panel  
ON indicates collision on the attached Ethernet Rear panel  
segment  
ON when data is received from the Ethernet  
attached segment  
Front and rear Yellow  
panels  
TX  
ON when data is transmitted from the modem  
to the Ethernet segment  
Front and rear Yellow  
panels  
ERR D4  
Bridge buffer overrun  
On the  
Red  
IR-ETH board  
31/12/2000 17:57  
Installation and Operation  
C-5  
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Appendix C - IR-ETH Interface Module  
HCD-E1 Installation & Operation Manual  
C-6  
Installation and Operation  
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Appendix D  
IR-ETH/Q Interface Module  
D.1 General  
IR-ETH/Q is an interface module for RAD modems, used for converting the  
Ethernet 10BaseT electrical levels to the modem TTL levels. It converts the  
Ethernet protocol to HDLC to enable long distance transmission and avoid  
the Ethernet collision limitation. The IR-ETH/Q module also supports  
IEEE 802.1/Q frames.  
IR-ETH/Q includes an internal, self-learning Ethernet bridge, which enables  
a high performance link between two Ethernet segments at a low  
transmission rate. The module also supports VLAN applications. The  
low-speed HDLC transmission is sent over the link using the modem  
modulation technique. It is converted back to an Ethernet signal at the  
remote modem.  
Figure D-1 shows a typical application of HCD-E1 with the IR-ETH/Q  
module. Each modem is connected to an Ethernet network via the Ethernet  
bridge.  
HCD-E1  
HCD-E1  
Figure D-1 Typical Application of HCD-E1 with IR-ETH/Q Module  
General  
D-1  
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Appendix D - IR-ETH/Q Interface Module  
HCD-E1 Installation & Operation Manual  
D.2 IR-ETH/Q Connector  
Figure D-2 shows the rear panel of HCD-E1, equipped with IR-ETH/Q  
module. Table D-1 lists the module RJ-45 connector pinout.  
RX OUT  
TX IN  
SUB E1  
P
10BASE-T  
CH.2  
INT  
O
W
E
ERR  
ACT  
R
CHANNEL  
HDSL  
LINE B  
NETWORK  
LINE A  
5
1
2
4
CH.1  
CH.1  
ALM RLY  
Figure D-2 Rear Panel of HCD-E1 with IR-ETH/Q Module  
Table D-1 IR-ETH/Q Connector Pinout  
Pin  
3
Signal  
RCV (+)  
RCV (-)  
XMT (+)  
XMT (-)  
GND  
6
1
2
D.3 Technical Specifications  
LAN Table  
5,000 addresses  
200 kbytes  
General  
LAN  
Buffer  
Standard  
Conforms to IEEE 802.3/Ethernet and  
supports IEEE 802.1/Q frames  
Data Rate  
Connectors  
Protocol  
10 Mbps (20 Mbps 10BaseT FDX)  
10BaseT (UTP): Shielded RJ-45  
HDLC  
WAN  
Data Rate  
According to the modem transmission rate  
D-2  
Technical Specifications  
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Appendix D - IR-ETH/Q Interface Module  
D.4 Installation and Operation  
Figure D-3 shows the IR-ETH/Q rear panel. Figure D-4 shows the DIP switch,  
which is located on the reverse side of the board.  
Figure D-3 IR-ETH/Q Module Layout  
Figure D-4 DIP Switch Location  
Installation and Operation  
D-3  
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Appendix D - IR-ETH/Q Interface Module  
HCD-E1 Installation & Operation Manual  
Configure the IR-ETH/Q module by setting the DIP switch in accordance  
with Table D-2. The DIP switch is located on the reverse side of the  
IR-ETH/Q module. To change the switch settings, you must undo three  
screws on the board and detach it from the main unit.  
Setting the DIP  
Switch  
Table D-2 DIP Switch Settings  
Switch  
Number  
Name  
FD/HD  
Description  
Default  
Setting  
5
ON:  
Full-duplex mode  
Half-duplex mode  
OFF:  
OFF  
Note: IR-ETH/Q does not support auto detection. Therefore, the equipment connected to IR-ETH/Q  
should not be set to auto detection mode and the half/full duplex setting should be set manually.  
6
TRANS/FIL  
OFF:  
ON:  
Passes only frames destined for another LAN  
Disables LAN filter; passes all frames transparently  
OFF  
For proper operation switch 4 must always be set to OFF (factory setting).  
Note  
Table D-3 lists the IR-ETH/Q rear-panel LED indicators and describes their  
functions.  
LED Indicators  
Table D-3 DIP Switch Settings  
LED Name  
Description  
Color  
Green  
Red  
INT  
ERR  
ACT  
ON indicates good link integrity  
ON indicates LAN/WAN buffer overflow  
ON when data is received from the Ethernet  
attached segment or when data is transmitted  
from the modem to the Ethernet segment  
Yellow  
Note: In filtered mode, IR-ETH/Q passes frames destined only for another LAN  
Use either a straight cable or a cross-cable for the LAN connection.  
Use a cross-cable when connecting to a port that does not implement the  
crossover function internally. Otherwise, use a straight cable.  
Connecting the  
LAN  
Hubs usually implement the crossover function internally while NICs and  
other devices do not.  
Note  
D-4  
Installation and Operation  
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Appendix E  
IR-IP Interface Module  
E.1 Introduction  
IR-IP is a high-performance, miniature IP router based on RAD's unique IP  
router chip, the ChipRouter.  
Introduction  
IR-IP works by taking each Ethernet frame from the LAN and determining  
whether the IP packet is destined for the IP net on the Ethernet LAN. If not,  
IR-IP forwards the packet to the WAN link. IP packets received from the  
WAN link are automatically forwarded to the LAN if the IP net matches.  
IR-IP includes hardware filters which handle all filtering operations at wire  
speed from both LAN-to-WAN and WAN-to-LAN, without dropping a single  
packet. Filtering and forwarding are performed at the maximum rate of  
35,000 and 30,000 frames per second (wire speed), respectively. The buffer  
can hold 256 frames of maximum size of 1534 bytes and a throughput  
latency of one frame.  
IR-IP is available with 10BaseT (UTP) interface and is fully  
IEEE 802.3/Ethernet v2 compliant. The IR-IP interface can also operate in full  
duplex Ethernet applications.  
HCD-E1 equipped with IR-IP interface module can be used as a Frame  
Relay Access Device (FRAD) with an integral IP router. RFC 1490 is  
supported for a single DLCI on the WAN link. Detection of the DLCI and  
the maintenance protocol is performed automatically. This allows the IR-IP  
to be used as the termination unit of IP services over Frame Relay at the  
customer premises, opposite a Frame Relay switch in the backbone.  
Alternatively, Point-to-Point Protocol (PPP) can be run on the WAN link with  
automatic negotiation on power-up, as well as support for PAP and CHAP  
authentication. With this feature, IR-IP can operate opposite any PPP  
compliant access server or backbone router.  
IR-IP supports HDLC, which is especially important for broadcast and  
multicast applications where bandwidth overhead is critical.  
IR-IP supports IP multicast at wire speed, making it suitable for any multicast  
environment including high speed downstream environments, such as  
satellite and xDSL. Users on the LAN who register with IR-IP for an IP  
multicast group using the IGMP protocol filter IP multicast packets at wire  
speed.  
Management and advanced configuration are performed via Telnet.  
Introduction  
E-1  
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Appendix E - IR-IP Interface Module  
HCD-E1 Installation & Operation Manual  
Figure E-1 shows a typical application of HCD-E1 with the IR-IP module.  
Application  
Router  
HCD-E1  
HCD-E1  
with IR-IP  
with V.35 Interface  
Figure E-1 Typical Application of HCD-E1 with IR-IP Module  
E.2 Technical Specifications  
LAN IP Net  
Up to 256 hosts on LAN IP net  
Router  
Filtering and Forwarding 30 kbps / 35 kbps  
Buffer  
256 frames (maximum size – 1534 bytes)  
Delay  
1 frame  
Standard  
Data Rate  
Conforms to IEEE 802.3/Ethernet v2  
LAN  
10 Mbps (20 Mbps 10BaseT in full duplex  
topology)  
Connector  
Protocols  
10BaseT (UTP): Shielded RJ-45  
PPP (PAP/CHAP)  
Frame Relay (RFC 1490)  
HDLC  
WAN  
E.3 Physical Descriptionr  
Figure E-2 shows the rear panel of HCD-E1, equipped with IR-IP module.  
RX OUT  
TX IN  
SUB E1  
P
10BASE-T  
CH.2  
INT  
O
W
E
ERR  
ACT  
R
CHANNEL  
HDSL  
LINE B  
NETWORK  
LINE A  
5
1
2
4
CH.1  
CH.1  
ALM RLY  
Figure E-2 Rear Panel of HCD-E1 with IR-IP Module  
E-2  
Physical Descriptionr  
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Appendix E - IR-IP Interface Module  
IR-IP contains three LEDs, which indicate the module activity. Table E-1  
lists the LEDs functions.  
IR-IP LEDs  
Table E-1 IR-IP LEDs Functions  
Name  
INT  
Type  
Function  
Green LED  
Yellow LED  
ON when IR-IP is powered up.  
ACT  
Blinks when there is transmit/receive activity on the  
Ethernet link.  
ERR  
Red LED  
During regular operation, turns on when a buffer  
overflow occurs.  
During power-up, provides additional indications,  
described below.  
IR-IP interface module contains a four-section DIP switch, as seen in  
Figure E-3. Table E-2 lists the DIP switch functions.  
IR-IP DIP Switch  
Figure E-3 IR-IP DIP Switch  
Table E-2 IR-IP DIP Switch Functions  
No Function  
Values  
1
2
3
4
Enables IR-IP to learn its IP  
Selects the WAN protocol  
Selects the LAN mode  
ON – IP address learning is enabled  
OFF – IP address learning is disabled  
Default – OFF  
ON – PPP protocol  
OFF – Frame Relay protocol  
Default – OFF  
ON – Full duplex operation  
OFF – Half duplex operation  
Default – OFF  
Controls the remote WAN test  
loopback, which returns packets  
received from the WAN back  
toward the WAN  
ON – The test loop is activated  
OFF – The test loop is disabled  
Default – OFF  
Physical Descriptionr  
E-3  
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HCD-E1 Installation & Operation Manual  
Table E-3 lists the module RJ-45 connector pinout.  
Table E-3 IR-IP Connector Pinout  
Pin Name  
Function  
1
2
3
6
TD (+)  
TD (-)  
Transmit data positive  
Transmit data negative  
Receive data positive  
Receive data negative  
RD (+)  
RD (-)  
E.4 IR-IP Management Subsystem, General  
The IR-IP interface module management subsystem supports the following  
functions:  
Introduction  
Preliminary configuration  
Configuration of management access parameters  
Advanced configuration of IR-IP parameters  
Collection and display of statistical performance data  
Maintenance functions, which include:  
Software downloading  
Resetting of various subsystems  
Display of error log  
Ping utility, for checking IP connectivity.  
The management subsystem of the IR-IP interface module is a separate,  
independent entity, and therefore it cannot be managed through the  
HCD-E1 management subsystem.  
The communication with the IR-IP management subsystem is made through  
the local LAN interface connector of the IR-IP module, designated  
10BASE-T, using the Telnet protocol. Passwords can be used to prevent  
unauthorized access.  
The IR-IP interface module must be configured in accordance with the  
specific requirements of the user’s application before it can be used in the  
user’s network. As a result, it is not possible to supply default parameters to  
enable IR-IP to start service without any preliminary configuration.  
Accessing the  
IR-IP  
Management  
Subsystem  
Therefore, to enable the user to establish Telnet communication and  
configure IR-IP, IR-IP is delivered with a factory-default set of parameters.  
The factory-default parameters are automatically used:  
Before the IP router is configured by the user, e.g., when a new HCD-E1  
with IR-IP interface module is put into operation  
After the user’s configuration parameters have been erased.  
E-4  
IR-IP Management Subsystem, General  
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Appendix E - IR-IP Interface Module  
When the factory-default parameters are used, the ERR indicator located on  
the HCD-E1 rear panel, near the IR-IP Ethernet interface connector flashes  
rapidly (about three times per second). The flashing of the ERR indicator also  
serves as a warning to the user that the IR-IP WAN interface does not send,  
nor does it receive packets, and therefore IR-IP can be accessed only from  
the LAN.  
After configuring IR-IP, it starts normal operation and routes the traffic in  
accordance with the user-selected configuration parameters.  
To change the parameters of an already-configured IR-IP, establish  
communication from a Telnet host using the assigned IP address.  
The factory-default IP communication parameters of the interface module  
are:  
Default IP  
Communication  
Parameters  
The default IP address of the IR-IP Ethernet port is 192.168.205.1, and  
the default IP subnet mask is 255.255.255.252.  
The port will accept IP communication only from the IP address  
192.168.205.2. Therefore, as long as the factory defaults are in effect,  
you must assign this address to the Telnet host used to configure IR-IP.  
Using the IP learning mechanism, as explained below can change the  
default parameters.  
E.5 Performing Preliminary Configuration  
The software necessary for performing all the management and  
configuration functions is stored in the IR-IP interface module, and  
therefore you only need a regular Telnet host to perform all the activities  
described in this appendix.  
General  
A Telnet host is any computer, e.g., an IBM PC or compatible that fulfills the  
following minimum requirements:  
A standard 10BaseT Ethernet interface  
A TCP/IP protocol stack, and therefore is capable of supporting IP  
communication through the Ethernet interface  
Telnet client software  
A ping utility.  
To perform the preliminary configuration procedure:  
Outline of  
Preliminary  
Configuration  
1. Connect the Telnet host to the IR-IP interface module.  
2. Configure the Telnet host to enable communication with the IR-IP  
interface module using the default IP parameters.  
Performing Preliminary Configuration  
E-5  
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3. Establish communication with IR-IP and assign the prescribed IP  
address to its LAN interface.  
4. Establish again communication with IR-IP and continue the preliminary  
configuration in accordance with the Quick Setup Menu section below.  
Before starting the management and configuration activities, it is necessary  
to establish IP communication between your Telnet host and the IR-IP  
interface module. For this purpose, it is necessary to provide a  
communication path.  
Connecting the  
Telnet Host  
Because of the method used to assign an IP address to IR-IP Ethernet port, it  
is recommended to connect the Telnet host directly to the IP router  
10BASE-T connector. This is made by connecting an Ethernet cross cable  
between the Ethernet connector of the Telnet host and the IP router  
connector.  
However, you may also connect through a common LAN: in this case,  
connect your Telnet host and IR-IP to Ethernet hub ports using straight  
cables.  
You can use the IP learning mechanism to configure the IP communication  
parameters of the IR-IP LAN interface. In this case, skip to the Assigning the  
Router LAN Interface Address section below.  
Preliminary Telnet  
Host  
Configuration  
If you prefer to use the factory-default parameters to establish IP  
communication between your Telnet host and IR-IP, configure the Telnet  
host as follows:  
1. Temporarily configure the host IP address as 192.168.205.2.  
2. The initial destination IP address to be used by the host is  
192.168.205.1.  
The first step in the preliminary configuration process is to assign the desired  
IP address to the LAN interface of the IR-IP interface module.  
Note  
After an IP address is assigned and saved, you must change the destination IP  
address of the Telnet host to the new address, otherwise it is not possible to  
continue the configuration process. At the same time, you can also change  
the temporary IP address assigned to the host (192.168.205.2) back to its  
permanent address.  
The IP address of the IR-IP LAN interface must be configured as part of the  
preliminary configuration process. To simplify this process, IR-IP includes a  
simple and convenient IP address learning mechanism.  
Assigning the  
Router LAN  
Interface Address  
The IP address can be configured and changed at any time, even after the  
complete IR-IP configuration process has been performed, because it does  
not affect other configuration parameters. Moreover, the IP subnet mask is  
automatically adapted to the new IP address.  
E-6  
Performing Preliminary Configuration  
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Appendix E - IR-IP Interface Module  
IP Learning Mechanism  
To simplify the configuration process, IR-IP has a special mechanism for  
configuring the IP address of its LAN interface. Setting section 1, called IP  
address learning, of the IR-IP DIP switch (Figure E-3) to ON enables this  
mechanism.  
The IP learning mechanism enables IR-IP to learn its LAN interface IP  
address by receiving frames sent by a ping utility to the prescribed LAN IP  
address.  
To use the IP learning mechanism, you do not need to know the current  
address of IR-IP LAN interface, but only the prescribed IP address.  
Note  
The IP address is actually retrieved from the ARP frames sent during pinging  
to locate the ping destination, not from the ping frames.  
To ensure that the process is correctly performed, it is recommended to  
check the contents of the ARP table before starting the ping utility, to make  
sure that it does not contain the address to be assigned to the IP router LAN  
interface.  
To view and edit the ARP table contents:  
If the Telnet host you are using runs under Microsoft Inc. Windows™ 95, 98  
or NT, use the following procedure to view and edit the ARP table contents:  
1. Display the table using the arp -acommand.  
2. If the table includes the intended IP address, remove it from the table  
using the arp -dcommand.  
If for some reason the IP learning process does not succeed, before  
repeating it make sure to remove the IP address from the table.  
Assigning a LAN IP Address to a New IR-IP  
The following procedure enables you to configure the LAN IP address of a  
new IR-IP router, i.e., a router using the default parameters (see the  
Accessing the IR-IP Management Subsystem section above).  
If HCD-E1 is already operating, skip Step 2 in the following procedure.  
To configure the IP router LAN address:  
1. Make sure the preparations described above have been completed,  
including the configuration of the ping utility.  
2. Turn HCD-E1 on and monitor the IP router indicators:  
The INT indicator turns on  
The ERR indicator lights steadily for approx. 15 seconds, and then  
starts flashing at a rapid rate (about three times per second).  
If the ERR indicator turns off, skip to the What to Do If ... section below.  
3. Set section 1 of IR-IP DIP switch to ON.  
The ERR indicator starts flashing faster (approximately four times a  
second).  
Performing Preliminary Configuration  
E-7  
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4. Send a ping to the new address to be used by IR-IP. A confirmation  
should be received after the third ping: after the confirmation, the  
flashing will slow down to approximately twice a second.  
If your host does not begin to receive ping replies after three  
unsuccessful attempts, skip to the What to Do If ... section below.  
5. Return section 1 of the IR-IP DIP switch to the OFF position.  
The ERR indicator must turn off.  
At this stage, the communication with IR-IP router is lost, because its IP  
address has been changed. Therefore, you must reconfigure the destination  
IP address of the Telnet host. If you wish, you may also change the  
temporary IP address assigned to the host (192.168.205.2) back to its  
permanent address.  
After changing the destination IP address of the Telnet host, it is  
recommended to turn HCD-E1 off for a few seconds and then back on,  
before continuing the configuration of the IP router in accordance with the  
Quick Setup Menu section below. At this time, in Step 2 the ERR indicator  
turns off after the 15-second interval.  
Changing the LAN IP Address of a Configured IR-IP  
The LAN IP address of an already-configured IR-IP can be changed while it  
operates, this means it is not necessary to turn HCD-E1 off before starting  
the configuration procedure. Note however that the IP traffic flow through  
IR-IP will be disrupted until the other stations in the IP network learn the  
new address.  
To change the LAN IP address of an already-configured IR-IP, use the  
procedure described above for a new IR-IP with the following differences:  
1. Configure the destination address of the ping utility to the new LAN  
interface IP address. It is not necessary to change the Telnet host source  
address.  
2. When ready, set section 1 of the IR-IP DIP switch to ON.  
The ERR indicator starts flashing faster (approximately four times a  
second).  
3. Perform Steps 4, 5 of the procedure used for a new IR-IP.  
What to Do If ...  
After HCD-E1 is turned on, the INT indicator does not light  
The IR-IP interface module does not receive power from the HCD-E1 power  
supply. Service is required.  
After HCD-E1 is turned on, the ERR indicator does not light  
IR-IP is faulty and must be replaced.  
E-8  
Performing Preliminary Configuration  
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Appendix E - IR-IP Interface Module  
After turn-on, the ERR indicator lights for 15 seconds and then turns off.  
ACT does not light, and there is no response from IR-IP  
No software loaded into IR-IP. Download software using the procedure  
described in the New Software Download Menu section below.  
After turn-on, the ERR indicator lights for 15 seconds, and then turns off.  
ACT lights from time to time, but there is no response from IR-IP  
IR-IP has been configured. If you do not know the current IP address of the  
LAN interface, erase IR-IP router configuration using the procedure given in  
the Erasing User’s Configuration section below.  
No ping replies from IR-IP  
If your host does not begin to receive ping replies after three unsuccessful  
attempts, check the physical connection path between the Telnet host  
Ethernet interface and the IR-IP 10BASE-T connector.  
The IP learning process is not successful  
Check that the prescribed IP address does not appear in the ARP table.  
E.6 IR-IP Management Utility  
The IR-IP interface module is managed via a simple, menu-driven utility  
that uses a basic terminal user interface. A typical screen is shown in  
Figure E-4.  
General  
Operating  
Procedures  
As seen in Figure E-4, each screen has a header that identifies the device  
being configured and its logical name, assigned by the user, followed by the  
running software revision and date. The bottom line of the screen displays  
prompts that guide you in the execution of the various activities.  
Use the following general procedures to perform the desired activity:  
To change a parameter or to select a menu item, type the corresponding  
line number.  
For a parameter, which has a discrete set of values, the parameter values  
are enclosed in brackets [ ]. To select a new value, press the spacebar to  
scroll among the available values until the desired value is displayed, and  
then press <Enter> to select the displayed value.  
To enter a value which requires free text entry, type in the desired string  
and then press <Enter>. Use backspace to erase the current string.  
After all the parameters have been selected, a prompt appears,  
requesting that you confirm the changes.  
For proper display of the screens, you must:  
Note  
Select a fixed-pitch system font for the display. Use your operating system  
documentation to find how to select a proper font.  
Configure the Telnet utility to use VT-100 terminal emulation.  
IR-IP Management Utility  
E-9  
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The management utility is started automatically when Telnet  
Starting a  
Management  
Utility  
communication is established. If password protection is enabled (see the  
Management Access Menu section below), you will be prompted to enter  
the Telnet password. The opening screen, which appears after the Telnet  
session activation, is the IR-IP Main menu (see Figure E-4).  
IR_IP  
<IR-IP>  
S/W Ver.1.00 31/IR (date)  
1. Quick Setup  
2. Management Access  
3. Advanced Setup  
4. Device Control  
5. View  
6. Diagnostic Tool (PING terminal)  
Press one of the numbers to select or ESC:  
Figure E-4 IR-IP Main Menu  
To end the utility, press <Esc> when the Main menu is displayed. This will  
also end the Telnet session.  
Figure E-5 shows the menu structure of the IR-IP management utility.  
Menu Structure  
of Management  
Utility  
Main Menu  
2. Management  
1. Quick Setup  
6. Diagnostic Tool  
PING Terminal  
3. Advanced Setup  
4. Device Control  
5. View  
Access  
1. Configuration and Connection  
2. ARP Tables  
3. Multicast Groups Table  
4. Statistics  
1. Ping IP Address  
2. Start Pinging  
3. Stop Pinging  
1.Telenet Password  
2. Telenet Activity Timeout  
3. SNMP Access  
4. SNMP Read Community  
5. SNMP Write Community  
6. SNMP Trap Community  
7. SNMP Management Table  
1. Device Identification  
1. Device Name  
2. Contact Person  
3. System Location  
1. New Software Download  
1. Server IP Address  
2. File Name  
3. Total Timeout  
4. Start Operation  
2. Interface Parameters  
1. LAN Status  
2. WAN Status  
2. View Error Log  
3. WAN Throttle  
4. Aging Timeout  
3. Resets  
1. LAN IP Address  
2. LAN IP Mask  
3. WAN IP Address  
4. WAN IP Mask  
5. Default Gateway  
1. Reset Device  
2. Reset LAN  
3. Reset WAN  
3. Protocol Parameters (FR)  
1. Self Learn  
2. Maintenance Protocol  
3. DLCI  
4. CIR  
5. EIR  
6. Read Protocol From DIP Switches  
7. Protocol  
3. Protocol Parameters (PPP)  
1. Header and Control Field Compression  
2. Protocol Field Compression  
3. Authentication Protocol  
4. Security Host/Guest  
5. User Name To Send  
6. Password To Send  
7. User Name To Accept  
8. Password To Accept  
4. Multicast  
1. Multicast Forwarding  
2. Static Groups  
Figure E-5 Management Utility, Menu Structure  
E-10  
IR-IP Management Utility  
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Appendix E - IR-IP Interface Module  
E.7 Quick Setup Menu  
The Quick Setup menu is used to select the main parameters’ values that  
must be defined before you start using IR-IP.  
Use the Advanced Setup menu (see the Advanced Setup Menu section  
below) to specify values for other IR-IP configuration parameters not  
included in this menu.  
To access the Quick Setup menu:  
From the Main menu, type 1.  
The Quick Setup menu appears (Figure E-6).  
IR_IP  
<IR-IP>  
S/W Ver.1.00 31/IR (date)  
Quick Setup  
=====================================================================  
1. LAN IP Address  
2. LAN IP Mask  
:192.168.100.001  
:255.255.255.000  
:...............  
:...............  
:...............  
:[ Yes ]  
3. WAN IP Address (empty for unnumbered)  
4. WAN IP Mask (empty for unnumbered)  
5. Default Gateway (empty - WAN interface)  
6. Read Protocol From DIP Switches  
7. Protocol  
:[ Frame Relay ]  
Press one of the numbers to select or ESC:  
Figure E-6 Quick Setup Menu  
Used to enter the IP address for the IP router LAN interface. This is the  
address to which nodes connected to the local LAN send packets  
addressed to the WAN.  
LAN IP Address  
LAN IP Mask  
Used to enter the IP subnet mask. The IP router supports a maximum of  
254 hosts on the LAN, therefore you must use Class C subnet masks. The  
basic subnet IP mask for Class C addresses, which supports the maximum  
possible number of hosts, 254, is 225.225.225.0. To help you understand  
the selection of IP subnet masks, Figure E-7 provides a configuration  
example for a LAN with 6 nodes: the IP subnet mask for a 6-node IP  
network is 225.225.225.248.  
HCD-E1 with IR-IP  
LAN IP Address: 192.168.1.2  
Mask: 255.255.255.248  
IP Address  
Mask  
192.168.1.2  
255.255.255.248  
192.168.1.1  
.3  
.248  
.4  
.248  
.5  
.248  
.6  
.248  
Default Gateway  
192.168.1.1  
192.168.1.1  
192.168.1.1  
192.168.1.1  
Figure E-7 Selecting the IP Subnet Mask  
Quick Setup Menu  
E-11  
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Used to enter the IP address for the IR-IP WAN interface, i.e., the IP  
address to be used by IP hosts on the WAN to reach this IR-IP interface  
module.  
WAN IP Address  
If the WAN IP Address field remain blank, IR-IP operates in the  
Unnumbered Router Mode.  
Used to enter the IP subnet mask for the WAN interface.  
WAN IP Mask  
Operation without Default Gateway  
Default Gateway  
The IP interface module is intended to enable the extension of LANs  
through the HCD-E1 link. Therefore, its default routing operation is different  
from the default routing operation of standard IP routers:  
IR-IP forwards packets with destinations not located on the local LAN  
through the WAN interface  
Packets received from the WAN interface and destined to hosts located  
on the local LAN are forwarded to the LAN; other packets are discarded.  
The default operation is used when the Default Gateway field is blank.  
Operation with Default Gateway  
You can instruct IR-IP to send packets with destinations not located on the  
local LAN to a specific router, which is called the default gateway. The  
default gateway must be connected to the local LAN.  
To use this option, enter the IP address of another router attached to the  
local LAN in the Default Gateway field.  
It is very important to obtain the correct parameters from the system  
administrator or ISP. The most common problem when establishing an IP  
connection is incorrect configuration of IP parameters and default gateway.  
Do not try to guess these parameters.  
Note  
Selecting YES for this parameter forces IR-IP router card to use the WAN  
protocol selected by section 2 of its DIP switch: PPP or Frame Relay.  
Read Protocol  
from DIP  
Switches  
Used to select the WAN protocol to be used by the IP router card: PPP,  
HDLC or Frame Relay.  
Protocol  
This parameter is available only if the Read Protocol from DIP Switches  
parameter is set to NO.  
E-12  
Quick Setup Menu  
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Appendix E - IR-IP Interface Module  
E.8 Management Access Menu  
The Management Access menu is used to enable the use of passwords to  
protect the access to IR-IP management utility, and control the inactivity  
time-out interval.  
When password protection is enabled, a Telnet management session can  
start only after the correct password is entered.  
To access the Management Access menu:  
From the Main menu, type 2.  
The Management Access menu appears (Figure E-8).  
IR_IP  
<IR-IP>  
S/W Ver. 1.00 31/IR (date)  
Quick Setup  
Management Access  
=====================================================================  
1. Telnet Password  
:..........  
:300..  
2. Telnet Inactivity Timeout (min)  
3. SNMP Access  
:Disabled  
:public....  
:public....  
:public....  
:>>>  
4. SNMP Read Community  
5. SNMP Write Community  
6. SNMP Trap Community  
7. SNMP Management Table  
Press one of the numbers to select or ESC:  
Figure E-8 Management Access Menu  
Since the IP router card does not support SNMP management, the SNMP  
Read Community, SNMP Write Community, SNMP Trap Community, and  
SNMP Management Table parameters are not used.  
Note  
By default, management access to IR-IP via Telnet is unrestricted. To  
restrict access, enter a Telnet password by selecting 1 in the Management  
Access menu. The password can include up to 10 characters, and is case-  
sensitive. The next time a Telnet session is opened, a password must be  
entered to enable you to access the IR-IP menus.  
Telnet Password  
At any time, only one Telnet connection to IR-IP is permitted. Any attempt  
to open an additional connection while the current session is open is  
rejected.  
This parameter specifies the time a Telnet session is kept open when there  
is no keyboard activity. When the specified time-out expires, the Telnet  
session is closed and another user can access IR-IP.  
Telnet Inactivity  
Timeout  
Management Access Menu  
E-13  
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E.9 Advanced Setup Menu  
The Advanced Setup menu is used to select the desired group of IR-IP  
configuration parameters.  
The parameters accessed through Advanced Setup menu supplement the  
parameters available on the Quick Setup screen, by providing control over  
all the other IR-IP parameters.  
To access the Advanced Setup menu:  
From the Main menu, press 3.  
The Advanced Setup menu appears (Figure E-9).  
IR_IP  
<IR-IP>  
S/W Ver. 1.00 31/IR (date)  
Quick Setup  
Management Access  
Advanced Setup  
=====================================================================  
1. Device identification  
2. Interface Parameters  
3. Protocol Parameters  
4. Multicast IP  
Press one of the numbers to select or ESC:  
Figure E-9 Advanced Setup Menu  
The Device Identification menu is used to define and store in the IR-IP  
logistic information: the logical name of IR-IP, information on the contact  
person and device location.  
Device  
Identification  
Menu  
To access the Device Identification menu:  
From the Advanced Setup menu, type 1.  
The Device Identification menu appears (Figure E-10).  
IR_IP  
<IR-IP>  
S/W Ver. 1.00 31/IR (date)  
Quick Setup  
Management Access  
Advanced Setup  
.....................................................................  
Device identification  
=====================================================================  
1. Device Name  
:IR-IP..  
2. Contact Person  
3. System Location  
:Name of contact Person  
:The location of this device  
Press one of the numbers to select or ESC:  
Figure E-10 Device Identification Menu  
E-14  
Advanced Setup Menu  
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Appendix E - IR-IP Interface Module  
Device Name  
Select this parameter to assign an arbitrary name to IR-IP for identification  
by the system manager (up to eight characters). The assigned name is  
displayed in the screen header.  
Contact Person  
Select this parameter to enter the name of the person to be contacted with  
matters pertaining to this equipment unit.  
System Location  
Select this parameter to enter the physical location of the device.  
The Interface Parameters menu is used to control the operation of IR-IP  
interfaces.  
Interface  
Parameters Menu  
To access the Interface Parameters menu:  
From the Advanced Setup menu, type 2.  
The Interface Parameters menu appears (Figure E-11).  
IR_IP  
<IR-IP>  
S/W Ver. 1.00 31/IR (date)  
Quick Setup  
Management Access  
Advanced Setup  
.................................................................  
Device identification  
Interface Parameters  
=================================================================  
1. LAN Status  
:[ Open ]  
:[ Open ]  
:[ Full ]  
:5  
2. WAN Status  
3. WAN Throttle  
4. Aging Timeout (min)  
Press one of the numbers to select or ESC:  
Figure E-11 Interface Parameters Menu  
LAN Status  
Used to enable/disable the flow of packets through LAN interface:  
Open – the flow of packets is enabled.  
Closed – the flow of packets is disabled. As a result, IR-IP does not  
accept, nor sends packets to the LAN, but its WAN interface may still be  
active, and can interact with other IP hosts on the WAN.  
Advanced Setup Menu  
E-15  
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WAN Status  
Used to enable/disable the flow of packets through the WAN interface:  
Open – the flow of packets is enabled.  
Closed – the flow of packets through the WAN interface is disabled. As a  
result, IR-IP does not accept from, nor sends packets to the WAN.  
However, the LAN interface of the IP router is still active.  
WAN Throttle  
This parameter specifies the maximum data rate at which frames are sent to  
the WAN (i.e., to the HCD-E1 HDSL link).  
The available selections are:  
64 kbps  
128 kbps  
128 kbps  
512 kbps  
1024 kbps  
Full (no restriction on the rate).  
Since the IP router buffers have a limited capacity (256 frames), it is  
recommended to select the WAN Throttle parameter in accordance with  
the line rate.  
Aging Timeout  
Used to specify the time after which inactive LAN stations are removed from  
the IR-IP ARP table.  
A station is defined as inactive when no IP traffic is received from it by the  
IR-IP LAN interface.  
The Frame Relay Protocol Parameters menu is used to configure the  
parameters Frame Relay WAN for protocol (the WAN protocol is selected  
by means of the Quick Setup Menu) in Figure E-6.  
WAN Protocol  
Parameters –  
Frame Relay  
Protocol Menu  
To access the Protocol Parameters menu:  
From the Advanced Setup menu, type 3.  
Self Learn  
Used to specify whether the Frame Relay DLCI and maintenance protocol is  
learned automatically (ENABLED), or is manually entered (DISABLED).  
Maintenance Protocol  
When the Self Learn parameter is DISABLED, use this parameter to specify  
the desired maintenance protocol.  
E-16  
Advanced Setup Menu  
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Appendix E - IR-IP Interface Module  
DLCI  
When the Self Learn parameter is DISABLED, use this parameter to specify  
the DLCI used for exchanging maintenance protocol messages.  
CIR  
Used to specify the maximum amount of data, in bits, which the Frame  
Relay network guarantees to transfer during the measurement interval (the  
measurement interval is usually one second).  
The value of this parameter is obtained from your Frame Relay service provider.  
EIR  
Used to specify the maximum amount of data, in bits, that the Frame Relay  
network will attempt to deliver during the measurement interval. The value  
of this parameter is obtained from the Frame Relay service provider.  
A typical Frame Relay Protocol Parameters menu is shown in Figure D-12.  
IR_IP  
<IR-IP>  
S/W Ver. 1.00 31/IR (date)  
Quick Setup  
Management Access  
Advanced Setup  
.....................................................................  
Device identification  
Interface Parameters  
Protocol Parameters  
=====================================================================  
1. Self Learn  
2. Maintenance Protocol  
3. DLCI (0-None)  
4. CIR  
:[ Enabled ]  
:[ ANSI T1.617 ANNEX D ]  
:0..  
:0.......  
5. EIR  
:64000...  
Press one of the numbers to select or ESC:  
Figure E-12 Frame Relay Protocol Parameters Menu  
The PPP Protocol Parameters menu is used to configure the parameters  
PPP WAN for protocol (the WAN protocol is selected by means of the (the  
WAN protocol is selected by means of the Quick Setup Menu) in  
Figure E-6.  
WAN Protocol  
Parameters – PPP  
Protocol  
To access the Protocol Parameters menu:  
From the Advanced Setup menu, type 3.  
Header and Control Field Compression  
Used to control the use of header and control field compression type  
according to RFC 1661. It is strongly recommended that this compression be  
used for troubleshooting only.  
Advanced Setup Menu  
E-17  
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HCD-E1 Installation & Operation Manual  
Protocol Field Compression  
Used to control the use of protocol field compression type according to  
RFC 1661. It is strongly recommended that this compression be used for  
troubleshooting only.  
Authentication Protocol  
Used to select the authentication protocol used by an IP router configured  
as host to validate incoming connections.  
Security Host/Guest  
This option can be used to configure the IP router either as a guest unit, to be  
authenticated by another router, or as a host unit, that authenticates other  
routers.  
User Name To Send  
The name by which an IP router card configured as guest identifies itself.  
Password To Send  
The password by which an IP router card configured as guest identifies itself.  
User Name To Accept  
The user name to be accepted by an IP router configured as host, when an  
incoming connection request is received.  
Password To Accept  
The user password to be accepted by an IP router configured as host, when  
an incoming connection request is received.  
A typical PPP Protocol Parameters menu is shown in Figure E-13.  
IR_IP  
<IR-IP>  
S/W Ver. 1.00 31/IR (date)  
Quick Setup  
Management Access  
Advanced Setup  
.....................................................................  
Device identification  
Interface Parameters  
Protocol Parameters  
=====================================================================  
1. Header and Control Field Compression  
2. Protocol Field Compression:  
3. Authentication Protocol  
4. Security Host / Guest  
5. User Name To Send  
6. Password To Send  
7. User Name To Accept  
8. Password To Accept  
:[ No ]  
:[ No ]  
:[ NONE/NONE ]  
:[ Guest ]  
:.................  
:.................  
:.................  
:.................  
Press one of the numbers to select or ESC:  
Figure E-13 PPP Protocol Parameters Menu  
E-18  
Advanced Setup Menu  
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Appendix E - IR-IP Interface Module  
The Multicast IP menu is used to specify the IP multicast frame forwarding  
parameters, and to access the static multicast groups’ table.  
Multicast IP  
Menu  
To access the Multicast IP menu:  
From the Advanced Setup menu, press 4.  
The Multicast IP menu appears (Figure E-14).  
IR_IP  
<IR-IP>  
S/W Ver. 1.00 31/IR (date)  
Quick Setup  
Management Access  
Advanced Setup  
.....................................................................  
Device identification  
Interface Parameters  
Protocol Parameters  
Multicast IP  
=====================================================================  
1. Multicast forwarding  
2. Static groups  
:[ Disable ]  
:>>>  
Press one of the numbers to select or ESC:  
Figure E-14 Multicast IP Menu  
Multicast Forwarding  
Used to control the forwarding of IP multicast frames. The following  
selections are available:  
DISABLED – Disables multicast forwarding in both directions.  
LAN to WAN – Enables forwarding of IP multicast frames addressed to  
groups appearing in the Static Multicast Groups table, from the LAN to  
the WAN.  
WAN to LAN – Enables forwarding of IP multicast frames addressed to  
groups appearing in the Static Multicast Groups table, from the WAN to  
the LAN.  
BIDIRECTIONAL – Enables forwarding of IP multicast frames addressed  
to groups appearing in the Static Multicast Groups table, in both  
directions.  
WAN to LAN + IGMP – Enables forwarding of IP multicast frames  
addressed to groups appearing in the Static Multicast Groups table, from the  
WAN to the LAN. In addition, more groups can be added dynamically (the  
additional can be viewed using the View menu – Figure E-19).  
TRANSPARENT – All the IP multicast frames are forwarded, irrespective  
of the Static Multicast Groups table.  
Advanced Setup Menu  
E-19  
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HCD-E1 Installation & Operation Manual  
Static Groups  
Select this parameter to access the static multicast groups table. The table is  
used to specify the IP addresses for up to 10 IP multicast groups. You can  
add, change, or delete each entry in the table (see the prompt line).  
To access the Static Groups menu:  
From the Multicast IP menu, type 2.  
The following screen appears:  
IR_IP  
<IR-IP>  
S/W Ver. 1.00 31/IR (date)  
Static Multicast Groups Table  
-----------------------------  
Group IP Address  
1. ................  
2. ................  
3. ................  
4. ................  
5. ................  
6. ................  
7. ................  
8. ................  
9. ................  
10. ...............  
Press 'A'-add, 'E'-edit, 'D'-delete, 'C'-clear all, 'ESC'-exit:  
Figure E-15 Static Multicast Groups Table  
E.10 Device Control Menu  
The Device Control menu is used to download software from TFTP servers  
and perform interface and device resets.  
To access the Device Control menu:  
From the Main menu, type 4.  
The Device Control menu appears (Figure E-16).  
IR_IP  
<IR-IP>  
S/W Ver. 1.00 31/IR (date)  
Quick Setup  
Management Access  
Advanced Setup  
Device Control  
----------------------------------------------------------  
1. New Software Download  
2. View error LOG  
3. Resets  
Press one of the numbers to select or ESC:  
Figure E-16 Device Control Menu  
E-20  
Device Control Menu  
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Appendix E - IR-IP Interface Module  
IR-IP operates as a TFTP client, and therefore it is possible to update its  
software by downloading new software from another computer that  
operates as a TFTP server.  
New Software  
Download Menu  
The New Software Download menu is used to specify the software  
downloading parameters.  
To access the New Software Download menu:  
From the Device Control submenu, type 1.  
New Software Download menu appears (Figure E-17).  
IR_IP  
<IR-IP>  
S/W Ver. 1.00 31/IR (date)  
Quick Setup  
Management Access  
Advanced Setup  
Device Control  
.....................................................................  
New Software Download  
=====================================================================  
1. Server IP Address  
2. File Name  
:...............  
:...................  
3. Total Timeout (sec)  
4. Start operation  
:..  
:>>>  
Press one of the numbers to select or ESC:  
Figure E-17 New Software Download Menu  
Server IP Address  
Used to enter the IP address of the TFTP server.  
File Name  
Used to enter the name and path of the file to be transferred from the TFTP  
server.  
Total Timeout  
Used to enter the time IP router should wait for an acknowledgment from  
the TFTP server, for example 60 seconds.  
Start Operation  
After selecting all the necessary parameters, type 4 on the New Software  
Download screen and then press <Enter> to start the downloading.  
You can follow the progress of the downloading process (indicated by arrows).  
Upon completion of the download process, the unit performs a reset. The  
Telnet connection is lost and must be restarted if required.  
Device Control Menu  
E-21  
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HCD-E1 Installation & Operation Manual  
This item of the Device Control submenu is used to view the error log file.  
This file logs errors detected in IR-IP for debug and technical support  
purposes.  
View Error Log  
Screen  
The Resets menu allows you to perform reset of IR-IP, or its interfaces.  
This operation can be used to restore normal operation after service is  
disrupted by an abnormal condition. Any data stored in the IR-IP buffers is  
discarded, and the flow of traffic is temporarily interrupted.  
Resets Menu  
To access the Resets menu:  
From the Device Control menu, type 3.  
The following screen appears:  
IR_IP  
<IR-IP>  
S/W Ver. 1.00 31/IR (date)  
Quick Setup  
Management Access  
Advanced Setup  
Device Control  
.....................................................................  
New Software Download  
View error LOG  
Resets  
=====================================================================  
1. Reset Device  
2. Reset LAN  
3. Reset WAN  
Press one of the numbers to select or ESC:  
Figure E-18 Resets Menu  
Reset Device  
To restart IR-IP:  
From the Resets menu, type 1.  
You will be prompted to confirm the reset operation.  
Resetting the device will restart the IR-IP interface module, and therefore  
traffic flow is temporarily interrupted, and the Telnet connection is lost.  
Note  
Reset LAN  
To reset the LAN interface:  
From the Resets menu, type 2.  
You will be prompted to confirm the reset operation.  
This operation restarts the IR-IP LAN controller.  
Note  
To continue your Telnet session, press any key within 15 seconds following  
the confirmation of the reset operation.  
E-22  
Device Control Menu  
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Appendix E - IR-IP Interface Module  
Reset WAN  
To reset the WAN interface:  
From the Resets menu, type 3.  
You will be prompted to confirm the reset operation.  
Resetting the WAN interface causes the WAN controller to be restarted. This  
results in renegotiation of the WAN protocol parameters.  
Note  
To continue your Telnet session, press any key within 15 seconds following  
the confirmation of the reset operation.  
E.11 View Menu  
The View menu is used to view the IR-IP configuration data, and display  
information on its ARP tables, multicast Groups tables and statistics.  
To access the View menu:  
From the Main menu, type 5.  
The View menu appears (Figure E-19).  
IR_IP  
<IR-IP>  
S/W Ver. 1.00 31/IR (date)  
Quick Setup  
Management Access  
Advanced Setup  
Device Control  
View  
----------------------------------------------------------  
1. Configuration and Connection  
2. ARP Tables  
3. Multicast Groups Table  
4. Statistics  
Press one of the numbers to select or ESC:  
Figure E-19 View Menu  
This screen is used to view the configuration parameters of IR-IP. In  
addition, you can also view the current status of the LAN and WAN  
interface.  
Configuration  
and Connection  
View Menu  
E-23  
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HCD-E1 Installation & Operation Manual  
To access the Configuration and Connection screen:  
From the View menu, type 1.  
The View Configuration screen appears (Figure E-20).  
IR_IP  
<IR-IP>  
S/W Ver. 1.00 31/IR (date)  
VIEW CONFIGURATION  
------------------  
BOOT Version  
Device Name  
:1.06 18.03.1999  
:IP router card  
System Location :The location of this device  
Contact Person :Name of contact person  
MAC Address  
: 00-20-D2-16-3F-9B  
Default Gateway : WAN  
Intrf Type Baud(Kbps) Prot IP Address  
IP Mask  
Status  
.....................................................................  
LAN UTP ------- Ethr 192.168.205.005 255.255.255.000 Connected  
WAN V.110  
FR  
Not Conn.  
Press any key to continue:  
Figure E-20 View Configuratiopn Screen  
This screen is used to display the IR-IP ARP table. This table shows the IP  
address assigned to each station on the LAN (the stations are identified by  
their MAC addresses).  
ARP Tables  
To access the ARP Tables screen:  
From the View menu, type 2.  
The ARP Tables screen appears (Figure E-21).  
IR_IP  
<IR-IP>  
S/W Ver. 1.00 31/IR (date)  
ARP Table  
---------  
IP Address  
MAC Address  
IP Address MAC Address  
192.168.205.003 00-40-33-20-C8-3C  
Press any key for exit  
Figure E-21 ARP Table Screen  
E-24  
View Menu  
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Appendix E - IR-IP Interface Module  
This screen is used to display information about the multicast group IP  
addresses and their status.  
Multicast Groups  
Table Screen  
To access the Multicast Groups Table screen:  
In the View menu, type 3.  
The Multicast Groups Table screen appears (Figure E-22).  
IR_IP  
<IR-IP>  
S/W Ver.1.00 31/IR (date)  
Multicast Groups Table  
----------------------  
Group IP Address Status  
Press any key for exit  
Group IP Address Status  
Figure E-22 Multicast Groups Table Screen  
The Statistics screen is used to display statistical information on the traffic  
between the networks connected by IR-IP. The data displayed on this  
screen enables you to evaluate the IR-IP performance. Two different  
Statistics screens are used, one for the LAN side and the other for the WAN  
side.  
Statistics Screen  
To access the Statistics menu:  
In the View menu, type 4.  
The LAN and WAN Statistics screens appear (Figure E-23 and  
Figure E-24).  
IR_IP  
<IR-IP>  
S/W Ver.1.00 31/IR (date)  
SYSTEM STATISTICS  
-----------------  
Counter Name  
Val  
Counter Name Val  
LAN in Octets  
83504 LAN IP Header Errors  
1 LAN IP Address Errors  
9 LAN Alignment Errors  
83504 LAN CRC Errors  
3560 LAN Single Collisions  
0 LAN Multiple Collisions  
1698 LAN Late Collisions  
2638 LAN Excessive Collisions  
0
0
0
0
0
0
0
0
LAN Unicast Frames In  
LAN Non-Unicast Frames In  
LAN Out Octets  
LAN Unicast Frames Out  
LAN Non-Unicast Frames Out  
LAN to WAN Frames Passed  
LAN IP Datagram Received  
LAN to CPU Frames Discarded  
LAN to WAN Frames Discarded  
LAN Out Errors  
0 LAN Frames Too Long Errors 0  
0 LAN RX FIFO Overrun Error  
0 LAN SQE Transmitted  
0 LAN Deferred Frames  
0 LAN Carrier Sense Lost  
0 LAN FIFO Underrun  
0
0
1
0
0
LAN RX Frames Errors  
LAN MAC Receive Errors  
LAN MAC TX Errors  
N - Next Screen. ESC - Back To Previous Menu.  
R - Refresh Page. C - Clear The Counters Of This Page.  
Figure E-23 LAN Statistics Screen  
View Menu  
E-25  
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HCD-E1 Installation & Operation Manual  
IR_IP  
<IR-IP>  
S/W Ver.1.00 31/IR (date)  
SYSTEM STATISTICS  
-----------------  
Counter Name  
WAN in Octets  
Val Counter Name  
83504 WAN Alignment Errors  
Val  
0
WAN Out Octets  
WAN Out Frames  
1950 WAN Aborted Frames  
1723 WAN Short Frames  
1698 WAN RX FIFO Overrun Error  
1723 WAN to CPU Frames Errors  
0 WAN Frame Too Long Errors  
0 WAN IP Header Errors  
0 WAN IP Addres Errors  
0
0
0
0
0
0
0
0
WAN to LAN Frames Transfer  
WAN IP Datagram Received  
WAN to CPU Discarded  
WAN to LAN Discarded  
WAN Out Errors  
WAN CRC Errors  
PPP Address Error  
PPP Control Error  
DLCI Unrecognized Error  
Frame Relay Forward Conge  
Frame Relay Backward Conge  
0
0
0
0
0
P - Previous Screen. ESC - Back To Previous Menu.  
R - Refresh Page. C - Clear The Counters Of This Page.  
Figure E-24 WAN Statistics Screen  
E.12 Diagnostic Tool (PING Terminal) Menu  
This section provides information on the diagnostic tool provided with IR-IP  
(the ping utility).  
To access the Diagnostic Tools menu:  
In the Main menu, type 6.  
The Diagnostic Tools menu appears (Figure E-25).  
IR_IP  
<IR-IP>  
S/W Ver. 1.00 31/IR (date)  
Quick Setup  
Management Access  
Advanced Setup  
Device Control  
View  
Diagnostic Tools (PING terminal)  
=====================================================================  
1. Ping IP Address  
2. Start Pinging  
3. Stop Pinging  
:192.168.100.011  
:>>>  
:>>>  
Press one of the numbers to select or ESC:  
Figure E-25 Diagnostics Tools Menu  
E-26  
Diagnostic Tool (PING Terminal) Menu  
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Appendix E - IR-IP Interface Module  
The Ping option is used to confirm IP connectivity by pinging other IP  
hosts. Connectivity is confirmed by receiving a reply from the remote  
(pinged) IP host.  
Using the Ping  
Function  
To ping a host:  
1. From the Diagnostic Tools menu, type 1 and enter the desired host IP  
address.  
2. Press <Enter> to confirm the destination IP address.  
3. To start pinging, type 2 on the Diagnostic Tools screen.  
After pinging starts, you can monitor the ping status. A typical screen  
is shown in Figure E-26.  
After pinging is started, it continues in the background even if you exit the  
Diagnostics Tools screen. In this case, a Ping Running message appears in the  
top upper left-hand corner of the screen.  
Note  
4. To stop pinging, type 3 from the Diagnostic Tools menu.  
A Ping Stopped message is displayed.  
To clear the message and return to the Diagnostic Tools screen,  
press any key.  
IR_IP  
<IR-IP>  
S/W Ver. 1.00 31/IR (date)  
Quick Setup  
Management Access  
Advanced Setup  
Device Control  
View  
Diagnostic Tools (PING terminal)  
=====================================================================  
1. Ping IP Address  
2. Start Pinging  
3. Stop Pinging  
:192.168.100.011  
:>>>  
:>>>  
Pinging 192.168.212.001 Sent 27 Recvd 25 Lost 2 Resp.Time 60 ms  
Press one of the numbers to select or ESC:  
Figure E-26 Diagnostic Tools Menu after Receiving Pinging Response  
Diagnostic Tool (PING Terminal) Menu  
E-27  
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HCD-E1 Installation & Operation Manual  
E.13 Erasing User’s Configuration  
The user-defined configuration parameters are stored in the IP router card  
flash memory. After the user-defined configuration parameters are erased,  
the IP router card automatically loads the factory-default parameters .  
You may want to erase the current configuration parameters:  
1. Before IR-IP is prepared for operation in a new application.  
2. When you cannot configure IR-IP because its current LAN-interface IP  
address and/or the Telnet password, are not known.  
To erase the user’s configuration:  
1. Turn HCD-E1 off.  
2. Set all the four sections of the IR-IP DIP switch to ON.  
3. Turn HCD-E1 on and monitor the ERR indicator: it must turn on and  
light steadily.  
4. While the ERR indicator is lit (within 15 seconds), set sections 1 and 2  
of the DIP switch to OFF.  
The IP router configuration is erased.  
If you do not set sections 1 and 2 to OFF within 15 seconds of power-up, the  
IP router card ignores the setting of all the four sections to ON and starts  
normal operation. In this case, it is recommended to turn HCD-E1 off and  
then back on.  
Note  
To abort the whole operation, turn HCD-E1 off, return all the four-switch  
section to the desired positions, and then turn HCD-E1 on again.  
5. Turn HCD-E1 off, and the return all the four sections of the DIP switch  
to the desired positions.  
E.14 Erasing IR-IP Software  
You may erase the IR-IP application software, without erasing the  
user-defined parameters.  
After the application software is erased, IR-IP starts its TFTP server  
application, and waits for the downloading of software by a TFTP client  
connected to its LAN interface. The procedure to be used to download the  
application software in this case is also described below.  
You may want to erase the application software if the downloading of new  
software using the Device Control menu (see Figure E-16) fails, and the IP  
router card does not function properly.  
E-28  
Erasing IR-IP Software  
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Appendix E - IR-IP Interface Module  
To erase the application software:  
1. Turn HCD-E1 off.  
Erasing  
Application  
Software  
2. Set all the four sections of IR-IP DIP switch to ON.  
3. Turn HCD-E1 on and monitor the IR-IP ERR indicator: it must turn on  
and light steadily.  
4. While the ERR indicator is lit (within 15 seconds), set sections 3 and 4  
of the IR-IP DIP switch to OFF.  
The IP router application software is erased.  
If you do not set sections 3 and 4 to OFF within 15 sec of power-up, IR-IP  
ignores the setting of all the four sections to ON and starts normal operation.  
In this case, it is recommended to turn HCD-E1 off and then back on.  
Note  
Alternately, to abort the whole operation, turn HCD-E1 off, return all the four  
switches to the desired positions, and then turn HCD-E1 on again.  
5. Turn HCD-E1 off, and the return all the four sections of the DIP switch  
to the desired positions.  
After erasing the application software, you can download new software  
from any computer that can serve as a TFTP client.  
Downloading  
New Software  
To enable the downloading, IR-IP automatically activates its TFTP server  
application with the following factory-default IP parameters:  
IP address:192.168.205.1  
Subnet mask: 255.255.255.252.  
Connect the computer serving as a TFTP client to the IR-IP 10BASE-T  
connector in the way as a Telnet host used for preliminary configuration (see  
the Performing Preliminary Configuration section). The computer IP  
parameters must be configured as follows:  
IP address 192.168.205.2  
Subnet mask255.255.255.252  
Default gateway 192.168.205.1  
To download new software:  
1. If necessary, turn HCD-E1 off.  
2. Set all the four sections of the IR-IP DIP switch to OFF.  
3. Turn HCD-E1 on and monitor the ERR indicator: it must start flashing.  
4. Connect the computer to the IP router LAN interface and configure its  
IP parameters as explained above.  
5. Run a standard TFTP client application on the Telnet host, and  
download the appropriate software file.  
If the download is successful, IR-IP starts using the new software.  
If the downloading fails, repeat the download process.  
Erasing IR-IP Software  
E-29  
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Appendix E - IR-IP Interface Module  
HCD-E1 Installation & Operation Manual  
E-30  
Erasing IR-IP Software  
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