ADCP-61-743 • Issue 3 • September 2004
Soneplex®
Remote Test Access Unit (RTAU)
User Manual)
Content
Page
1
2
DESCRIPTION........................................................................................................................................4
1.1 DS3 MUX Compatibility .....................................................................................................................6
INSTALLATION ......................................................................................................................................6
2.1 Initial Installation ............................................................................................................................7
2.1.1 Damaged Pins.........................................................................................................................8
2.2 Maintenance Installation (Existing System) .............................................................................................9
LED CHECK ......................................................................................................................................... 10
FRONT PANEL OPERATION ...................................................................................................................... 11
CONFIGURATION .................................................................................................................................. 12
TL1 COMMANDS................................................................................................................................... 28
SPECIFICATIONS .................................................................................................................................. 29
CUSTOMER INFORMATION AND ASSISTANCE ............................................................................................... 30
3
4
5
6
7
8
INTRODUCTION
This manual describes and provides installation procedures for the Remote Test Access Unit
(RTAU) module used in the Soneplex Broadband System (MPU V5.3 and SCU V3.0 or later).
Revision History
ISSUE
DATE
REASON FOR CHANGE
Issue 1 06/1999
Issue 2 04/2000
Issue 3 09/2004
Original
Add DS3 MUX compatibility and SCU 3.0 or later support.
Technically updated 2. Installation, 3. LED Check, and 8. Customer Information and Assistance
sections.
Trademark Information
ADC and ADC Telecommunications are registered trademarks of ADC Telecommunications, Inc.
Soneplex is a registered trademark of ADC Telecommunications, Inc.
1304058
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ADCP-61-743 • Issue 3 • September 2004
FCC Compliance Statement
The Remote Test Access Unit has been certified to comply with the requirements for Class A
computing devices per part 15 of the FCC regulations.
Warning: This equipment generates, uses, and can radiate radio frequency energy and if not
installed and used in accordance with the instruction manual, may cause interference to radio
communications. It has been tested and found to comply with limits for a Class A digital device
pursuant to Subpart A of Part 15 of FCC Rules, which are designed to provide reasonable
protection against such interference when operated in a commercial environment. Operation
of this equipment in a residential area is likely to cause interference to TV and radio reception
in which case the user, at their own expense, will be required to take whatever measures may
be required to correct the interference.
This equipment does not exceed Class A limits for radio emission for digital apparatus, set out in
the radio interference regulation of the authorization methods of Industry Canada. Operation in
a residential area may cause unacceptable interference to TV and radio reception requiring the
owner or operator to take whatever steps are necessary to correct the interference.
Certification
The Soneplex Broadband system is compliant with UL 1459.
Standards
ANSI T1.403-1997
TR-NPL-000054
Carrier to Customer Installation: DS1 Metallic Interface, 1997
High-Capacity Digital Service (1.544 Mbps) Interface General
Requirements for End Users, Issue 1, April 1989
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ADCP-61-743 • Issue 3 • September 2004
1 DESCRIPTION
The Remote Test Access Unit (RTAU) (Figure 1) provides maintenance functionality for
monitoring and intrusive test access to the DS1 channels in the chassis between the DS3 MUX
and the low speed distribution modules (DLX, HLXC, ODS2, and RLX). The RTAU requires
no periodic maintenance. It requires the Version D1 or later DS3 MUX module and MPU
Version 5.3 or SCU Version 3.0 or later system software to be functional in the Soneplex
Broadband System for DS3 applications. If an earlier version of MPU software is used, the
RTAU will appear as a blank slot on the Craft Interface’s Inventory Status screen. Earlier
versions of the SCU software will not display the TAU slot.
The RTAU has the following features:
• Access supervision for intrusive testing (i.e., monitor access, split access for both A and
B transmission paths, and loop access for both A and B transmission paths).
• Stress testing of any circuit within the system via the Internal Test Signal Generation
feature. Many DS1 networks are tested by passing repeating sequences (patterns) of
logical ones and zeros through the network, also known as stress test patterns. As the test
patterns are applied to the circuit, they are compared with the original pattern to
determine if any errors are introduced. QRS (Quasi Random Signal) is one of the test
patterns supported. (QRS conforms to TR-NPL-000054.)
• Capable of inserting bit errors at a specified rate or as single errors or burst errors to the
DS1 circuit being tested.
• Ability to monitor (intrusively or non-intrusively) the DS1 circuit being tested.
• User control through the Craft Interface or via the TL1 interface.
• Access to the DS1 through front panel bantam jacks or through the internal test signal
generator. This control is configurable through the Craft Interface.
• Supports the Building Integrated Timing Supply (BITS) primary interface through the
wire wrap pins on the back of the Soneplex Broadband chassis. If a valid BITS signal is
applied to the Broadband chassis, the RTAU will automatically switch over to the BITS
primary interface and use the recovered clock for timing.
Note: The BITS secondary interface on the Soneplex Broadband chassis is not supported
by the RTAU.
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ADCP-61-743 • Issue 3 • September 2004
RTAU
STATUS
B8ZS
AMI
LINE CODE
INTRUSIVE
TEST
BIPOLAR
ACCESS
11897-A
D
S
1
RX
TX
Figure 1. Remote Test Access Unit (RTAU) Module
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ADCP-61-743 • Issue 3 • September 2004
1.1 DS3 MUX Compatibility
Refer to Table 1 for compatibility information for DS3 MUXs, test access units, and MPU/SCU
software versions.
Table 1. DS3 MUX, TAU/RTAU, and MPU/SCU Software Compatibility
TEST ACCESS
MPU SOFTWARE
VERSION
SCU SOFTWARE
VERSION
DS3 MUX TYPE
UNIT TYPE
FUNCTIONALITY
TAU
C1
C1
D1
D1
D1
G1
G1
G1
TAU
5.1.1 or later
5.1.1 or later
5.1.1 or later
5.2 or earlier
5.3
2.5 or later
2.0 or later
2.5 or later
2.5 or earlier
3.0 or later
2.5 or later
2.5 or earlier
3.0 or later
RTAU
TAU
NO TEST ACCESS
TAU
RTAU
RTAU
TAU
NO TEST ACCESS
RTAU
5.1.1 or later
5.2 or earlier
5.3
TAU
RTAU
RTAU
NO TEST ACCESS
RTAU
Refer to the Soneplex System Operation and Maintenance Manual listed under Related
Publications at the beginning of this manual for more information.
2 INSTALLATION
There are two installation procedures:
•
•
Initial Installation - This installation procedure applies to the first time an IBBC shelf
will be populated with a RTAU module.
Maintenance Installation (Existing System) - This installation procedure applies to an
IBBC shelf that has already been populated with a RTAU module.
Please follow the appropriate procedure per your system configuration.
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ADCP-61-743 • Issue 3 • September 2004
2.1 Initial Installation
This installation procedure applies to the first time an IBBC shelf will be populated with
a RTAU module. If the IBBC shelf has already been populated with a RTAU module, go
to 2.2. Maintenance Installation (Existing System).
Installation consists of unpacking and installing the RTAU module, and verifying that it is
functioning properly. Use the following procedure to install a RTAU module:
Caution: Electronic modules can be damaged by static electrical discharge. Before handling
modules, wear an anti-static discharge wrist strap to prevent damage to electronic
components. Place modules in anti-static packing material when transporting or storing. When
working on modules, always place them on an approved anti-static mat that is electrically
grounded.
Warning: If the RTAU module is improperly installed, damage can be caused to the system.
Be careful when inserting the RTAU module into a new chassis.
Caution must be used to prevent bending pins when inserting modules into a new IBBC shelf.
Once a module has been successfully seated in the connector, it “trains” the pins and aligns
them to the modules connector greatly reducing the chances of bending pins on subsequent
insertions. The following procedure outlines a method to mitigate the risk on a new shelf
installation.
1. Open the front cover of the Soneplex Broadband system.
2. Open the shipping carton and carefully unpack the RTAU module from its protective
packing material.
3. Once the Soneplex shelf has been installed and powered up:
a. Remove both-48V A and B side fuses (and “pilot” fuses if used).
b. Inspect the RTAU slots for bent or misaligned pins.
c. If pins are not bent, continue to the next step. If pins are bent, refer to 2.1.1 Damaged
Pins section.
4. With shelf unpowered, refer to the chassis marking above the module slot (Figure 2) to
install the RTAU module in the full-height slot labeled TAU.
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ADCP-61-743 • Issue 3 • September 2004
APU
1-1 1-3 2-1 2-3 3-1 3-3 4-1 4-3 5-1 5-3 6-1 6-3 7-1 7-3
HSP
HSW
MXW MXP TAU
CR
MJ
MN
ACO
PWR
RTAU
HSKP
RMT
ALM
STATUS
STATUS
D
I
S
P
R
M
T
LPBK
LPBK
STATUS
LMPTST
ENABLE
ENABLE
B8ZS
AMI
APU
ONLINE
ONLINE
LINE CODE
DS3 FAIL
DS3 FAIL
INTRUSIVE
TEST
STATUS
LOCKOUT
FORCE
LOCKOUT
FORCE
APS
APS
C
R
A
F
T
LMPTST/
APS
LMPTST/
APS
RX
TX
D
S
1
RESET
RESET
RESET
1-2 1-4 2-2 2-4 3-2 3-4 4-2 4-4 5-2 5-4 6-2 6-4 7-2 7-4 SCU
14185-A
RTAU MODULE
Figure 2. RTAU Mounting Position in the Soneplex Broadband
5. Align the module edges of the RTAU with the mounting slot module guides. Use the
injectors to seat the module in the chassis.
6. Remove the RTAU module.
7. Inspect the backplane connector for bent pins.
8. If pins are not bent, continue to the next step. If pins are bent, refer to 2.1.1 Damaged
Pins section.
9. Re-install the RTAU module.
10. With the RTAU module installed, power up the shelf one fuse at a time.
a. Install the -48V A fuse.
b. Install the -48V B fuse.
Refer to 8. Customer Information and Assistance, if needed.
2.1.1 Damaged Pins
The pins used in the back plane connector should not be straightened after they have been
deflected more than 10 degrees from vertical as they will “work harden” and break at the
bend. Bent pins must be removed and replaced using special tools and is not
recommended as a field repair. Remove shelf with damaged pins and contact ADC for
replacement. Refer to 8. Customer Information and Assistance.
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ADCP-61-743 • Issue 3 • September 2004
2.2 Maintenance Installation (Existing System)
Replacement of the RTAU module in existing IBBC shelves should follow normal
maintenance procedures. Since a module has already been in service in the affected slot, the
backplane pins will have been trained into alignment with subsequent replacement modules. If
excessive resistance is encountered upon insertion, remove the module and inspect for
misalignment or obstructions.
This procedure assumes that the IBBC shelf has already been populated with a RTAU
module. If this is the first time that the IBBC shelf has been populated with a RTAU
module, go to 2.1 Initial Installation.
Installation consists of unpacking and installing the RTAU module, and verifying that it is
functioning properly. Use this procedure to install a RTAU module.
Warning: To prevent electrical shock, never install equipment in a wet location or during a
lightning storm. When installing or modifying telephone lines, disconnect lines at the network
interface before working with uninsulated lines or terminals.
Caution: Electronic modules can be damaged by electrostatic discharge (ESD). Before
handling modules, wear an anti-static discharge wrist strap to prevent damage to electronic
components. Place modules in anti-static packing material when transporting or storing. When
working on modules, always place them on an approved anti-static mat that is electrically
grounded.
1. Open the front cover of the Soneplex Broadband (V5) chassis.
2. Open the shipping carton and carefully unpack the RTAU module from its protective
packing material. Inspect the module for damage
3. Refer to chassis markings above the module slot (Figure 2) to install the RTAU module
in the full-height slot marked TAU.
4. Align the module edges of the RTAU with the mounting slot module guides. Use the
injectors to seat the module in the chassis. If there is excessive resistance, remove the
module and check for obstructions or improper alignment.
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ADCP-61-743 • Issue 3 • September 2004
3 LED CHECK
1. When the RTAU module (Figure 3) is seated, the STATUS LED will be lit red for
approximately 5 seconds. All LEDs will then flash yellow, and then the STATUS LED
will be lit green. If the STATUS LED is not lit green after 10 seconds, replace the
module. Refer to 2.2 Maintenance Installation (Existing System).
RTAU
STATUS
B8ZS
AMI
LINE CODE
INTRUSIVE
TEST
BIPOLAR
ACCESS
RX
D
S
TX
1
12693-B
Figure 3. RTAU Front Panel
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ADCP-61-743 • Issue 3 • September 2004
4 FRONT PANEL OPERATION
All controls and indicators of the RTAU including the jack accesses for a selected DS1 signal
are located on the front panel (Figure 3). The controls and indicators are described in Table 2.
Table 2. RTAU Front Panel Description
INDICATOR
COLOR
Red
DESCRIPTION
STATUS
Module failure.
LED test.
Yellow
Green
Green
Module operating normally.
B8ZS / AMI
Intrusive Test
Indicates that the user has selected B8ZS line code for the bipolar
interface.
Yellow
Off
Indicates that the user has selected AMI line code for the bipolar
interface.
Indicates that the user has selected the internal signal monitor
generator at the RTAU.
Yellow
Green
LED test.
Indicates that the selected test mode of the RTAU is intrusive.
No intrusive testing in progress.
Off
SWITCH
DESCRIPTION
LINE CODE
This is a pushbutton switch that toggles the DS1 interface between B8ZS, AMI, or
the internal signal monitor generator at the RTAU. When B8ZS has been selected,
the B8ZS/AMI LED will turn green; when AMI has been selected, the B8ZS/AMI
LED will turn yellow; when the internal signal monitor generator at the RTAU is
selected, the B8ZS/AMI LED will turn off. Using this switch overrides the Craft
Interface RTAU Line Code field setting.
BIPOLAR
ACCESS JACKS
DESCRIPTION
DS1 RX
Bantam jack connection from DS1 receive to test equipment. Bipolar DS1 signals
from external test equipment can be applied to the RX jack for testing.
DS1 TX
Bantam jack connection from DS1 transmit to test equipment. Bipolar DS1 signals
from external test equipment can be applied to the TX jack for testing.
Note: The DS1 RX and DS1 TX jacks may be used with 22 AWG Plastic Insulated
Cable (PIC) up to 655 feet in length. Access for drop or insert of DS1 signals
towards the network (DS3 interface) or toward the customer (DS1 distribution
modules) for monitoring and intrusive testing is configured through the Craft
Interface or the TL1 interface.
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ADCP-61-743 • Issue 3 • September 2004
5 CONFIGURATION
Use this menu to view or edit the configuration for the RTAU module after it is installed in the
chassis. This menu can also be used to equip, provision, assign thresholds, and assign service
state.
Note: A “toggle” field type means the user can press the space bar to view and select the
next option that is described; or the user can press the “R” key to view and select the previous
option. An “input” field type means the user must type an entry in the field according to the
parameters described. A “fixed” field is locked and cannot be changed by the user.
Note: Edits can be made in the configuration database in one of two ways: 1) If the
complete field is highlighted, use the space bar to toggle forward or the “R” key to
reverse toggle through the options for that field. 2) If only the first space or the field is
highlighted, type in the data that applies to that field.
Note: Edits can be saved into the configuration database after each change is made in
one of two ways: 1) Press an arrow key and then Enter or Return once; or 2) Press Enter
or Return twice after all selections and entries are made in the screen but before leaving
the screen. If the entries have been accepted, a message “Configuration Successful…
Press Any Key To Continue” will appear on the screen.
Note: Press CONTROL-A for help information on moving around and editing fields.
Note: The RTAU’s status can also be displayed using the Shelf Status screen, where the
letter “R” in the TAU slot column means an RTAU is present. Refer to the Soneplex
System Operation and Maintenance Manual listed under Related Publications at the
beginning of this manual for more information on the Shelf Status screen.
Note: Be sure to configure the line card to be tested before setting up test access.
1. Refer to Figure 3 (shown previously). Check that the STATUS LED on the front panel of
the RTAU module is green, indicating that the module is operating normally.
2. Log on to the Craft Interface. If you are unfamiliar with the log on procedure, refer to the
Soneplex System Operation and Maintenance Manual listed under Related Publications at
the beginning of this manual for more information.
3. Use the arrow or number keys to select System Maintenance from the Main Menu. Press
Enter or Return. The System Maintenance menu will appear as shown in Figure 4.
4. Use the arrow or keyboard keys to select Test Access Unit Commands from the System
Maintenance menu. Press Enter or Return. The RTAU Configuration menu will appear as
shown in Figure 5.
Note: The User Pattern Definition screen is not available for the MPU 5.3 or SCU V3.0
releases.
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ADCP-61-743 • Issue 3 • September 2004
5. Use the arrow or number keys to select RTAU Setup and Control from the RTAU
Configuration menu. Press Enter or Return. The RTAU Setup and Control screen will
appear as shown in Figure 6.
Note: If the RTAU is not plugged into the chassis and the Test Access Unit Commands
selection is made from the System Maintenance menu, the Test Access Unit
Status/Commands screen will appear as shown in Figure 7. This screen cannot be
configured. However, if the TAU is plugged into the chassis and the Test Access Unit
Commands selection is made from the System Maintenance menu, the Test Access Unit
Status/Commands screen will appear and can be configured.
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ADCP-61-743 • Issue 3 • September 2004
SYSTEM MAINTENANCE
1. Force/APS Commands
2. Reset/LED Test Commands
3. Execute ACO (Alarm Cutoff)
4. Loopback Status/Commands
5. Display Inventory
6. Display Circuit IDs
7. SCU-860 Data Transfer Commands
8. Trouble Isolation
9. Metallic Testing Screen (for IBBCMLQ only)
A. Test Access Unit Commands
Press CONTROL-A For Assistance
Figure 4. System Maintenance Menu
RTAU CONFIGURATION
1. RTAU Setup and Control
2. User Pattern Definition
Press CONTROL-A For Assistance
Figure 5. RTAU Configuration Menu
6. Starting at the top of Table 3 and working your way to the bottom, configure RTAU
fields. Use the arrow keys to move from field to field.
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ADCP-61-743 • Issue 3 • September 2004
7. Assign the selections by pressing Enter or Return.
RTAU SETUP AND CONTROL
EQUIPMENT SETUP
===============
Current User : NONE
Test Circuit: 1-1
Line Code
: INTERNAL
Mode
: DISABLE
SIGNAL GENERATOR SETUP
======================
Pattern Type : QRS
#:
--------------------------------
Frame Format : UNFRAMED
Loop Code
: NONE
#:
----------------
BIT ERROR SETUP
===============
Error Count : 0
Error Rate : OFF
Error Locn : NONE
Error Counts
============
Data :
BPV :
Frame:
Status
======
F Sync:
P Sync:
RAI :
Elapsed Time
============
ES :
EFS:
CRC :
COFA :
Test Timeout : 60
In Minutes
Measurement : STOP
Press CONTROL-A For Assistance
Figure 6. RTAU Setup and Control Screen
(Showing Defaults for Screen With Line Code Field Set to INTERNAL)
TEST ACCESS UNIT STATUS/COMMANDS
Group: 1
DS1#: 1
Drop Direction
==============
Status :
Insert Direction
================
Command :
TAU Present Status: NO
Press Control-A For Assistance
Figure 7. Test Access Unit Status/Commands Screen
(If there is a TAU in the chassis, the TAU Present Status: displays YES)
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ADCP-61-743 • Issue 3 • September 2004
Table 3. RTAU Configuration Fields
DESCRIPTION
FIELD
TYPE
OPTIONS
DEFAULT
EQUIPMENT SETUP FIELDS
Current User
Toggle
OVERVIEW: The Current User field can only be
NONE
set to NONE or CRAFT from the Craft menu. If
the Current User field is set to NONE, the Mode
field is automatically set to DISABLE. However,
to change this field to CRAFT, the Mode field
must first be set to an option other than DISABLE.
At that point, the Current User field is
automatically set to CRAFT.
NONE
CRAFT
TL1
The RTAU is not being used.
The RTAU is being controlled via the Craft.
The RTAU is being controlled via the TL1
interface. This option cannot be enabled from
the Craft menu. When a “Connect Test Access
T1” command is issued, the Current User field
is automatically set to TL1.
EM
The RTAU is being controlled via the Element
Manager.
Line Code
Toggle
OVERVIEW: If external test equipment is being
used, set the Line Code field to either AMI or
B8ZS. (External test equipment required: T-Berd
211 DS1 test set or equivalent that can generate a
T1 signal.) If the internal signal monitor and
signal generator of the RTAU is being used, set
the line code to INTERNAL. In addition, when
an intrusive test mode is selected and the line
code is set to INTERNAL, the signal generator
“Pattern Type” field defaults to QRS to transmit
an unframed QRSS signal.
INTERNAL
INTERNAL
B8ZS
Disables RTAU front panel bantam jacks for
test access. Selects internal TSG and SPD.
Enables Bipolar Eight-Zero Substitution line
code through the Craft Interface.
AMI
Enables Alternate Mark Inversion line code
through the Craft Interface.
Test Circuit
Input
1-1, 1-2, 1-3, 1-4,
2-1, 2-2, 2-3, 2-4,
3-1, 3-2, 3-3, 3-4,
4-1, 4-2, 4-3, 4-4,
5-1, 5-2, 5-3, 5-4,
6-1, 6-2, 6-3, 6-4,
7-1, 7-2, 7-3, 7-4
Group and slot number to be dropped by the
DS3 MUX. The Test Circuit option can only be
changed if the value set in the Mode field is
DISABLE.
1-1
(continued)
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ADCP-61-743 • Issue 3 • September 2004
Table 3. RTAU Configuration Fields, continued
FIELD
TYPE
OPTIONS
DESCRIPTION
DEFAULT
EQUIPMENT SETUP FIELDS, continued
Mode
Toggle
OVERVIEW: Valid access modes and the resulting
configurations are shown in Figure 8 (RTAU Test
Configuration Block Diagram), Figure 9 (MONF and
MONE), Figure 10 (SPLTB and SLPTA), Figure 11
(Typical Round-Robin Test Configuration), Figure 12
(Typical End Test Configuration), Figure 13 (SPLTF
and SLPTE), Figure 14 (Typical Point-to-Point Test
Configuration), Figure 15 (SPLTFL and SPLTEL),
and Figure 16 (LOOPF and LOOPE). In addition,
when the Mode field change is saved by pressing the
Enter or Return key, the MPU or SCU will instruct
the DS3 MUX to drop and insert the selected circuit.
DISABLE
DISABLE
When DISABLE is selected, no monitor or split
access can take place. Setting the Mode field to
DISABLE also stops any measurement in
progress, as if the Measurement field (described
below) had been set to STOP. The tested circuit
will also be restored to normal operation.
MONE
MONF
SPLTA
Non-intrusive monitor access to the A pair.
Non-intrusive monitor access to the B pair.
SPLTA mode indicates a split in the A
transmission path with a Test Signal Generator
(TSG) connected in the F direction, and a Signal
Presence Detector (SPD) connected to the signal
from the E direction.
SPLTB
SPLTE
SPLTB mode indicates a split in the B
transmission path with a TSG connected in the E
direction and an SPD connected to the signal from
the F direction.
SPLTE mode indicates a split in both the A and B
transmission paths. An SPD is connected to the line
incoming from the E direction and a TSG is
connected to the line outgoing to the E direction. The
line outgoing in the F direction is connected to a
QRSS source and the line incoming from the E
direction is terminated by the nominal characteristic
impedance of the line.
SPLTF
SPLTF indicates a split in both the A and B
transmission paths with a TSG connected to the line
outgoing to the F direction and an SPD connected to
the line incoming from the F direction. The line
outgoing in the E direction is connected to a QRSS
source and the line incoming from the E direction is
terminated by the nominal characteristic impedance
of the line.
(continued)
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ADCP-61-743 • Issue 3 • September 2004
Table 3. RTAU Configuration Fields, continued
FIELD
TYPE
OPTIONS
DESCRIPTION
DEFAULT
EQUIPMENT SETUP FIELDS, continued
Mode, continued
SPLTEL
SPLTEL indicates a split in both the A and B paths
and connects an SPD to the line incoming from the
E direction and a TSG to the line outgoing in the E
direction similar to SPLTE mode. The signal in the
F direction is looped back.
Toggle
SPLTFL
LOOPE
SPLTFL indicates a split in both the A and B paths
and connects an SPD to the line incoming from the
F direction and a TSG to the line outgoing in the F
direction similar to SPLTF mode. The signal in the
E direction is looped back.
The LOOPE mode is a full split of both A and B
transmissions paths. The incoming line in the E
direction is connected to the SPD and this line is
connected to the outgoing line in the E direction.
The circuit will be looped in one direction. The
outgoing line in the F direction (non-test direction)
will be connected to a QRSS source and the line
incoming from the F direction is terminated by the
nominal characteristic impedance of the line.
LOOPF
The LOOPF mode is a full split of both A and B
transmissions paths. The incoming line in the F
direction is connected to the SPD and this line is
connected to the outgoing line in the F direction. The
circuit will be looped in one direction. The outgoing
line in the E direction (non-test direction) will be
connected to a QRSS source and the line incoming
from the E direction is terminated by the nominal
characteristic impedance of the line.
SIGNAL GENERATOR SETUP FIELDS
Pattern Type
Toggle
OVERVIEW: If the desired pattern type is not
available, select the User Code option to enter a
pattern 32 bits or less.
QRS
20
QRS
Quasi-Random Signal. QRS (2 -1) is a 1,048,575-
bit sequence generated by a 20-stage shift register
with feedback taken from the 17th and 20th stages.
The non-inverted output is taken from the 20th
stage, and an output bit is forced to be a ‘1’
whenever the next 14 bits are all 0’s. QRS is
typically used to verify continuity and to check
circuit performance in the presence of traffic-like
signals. Quasi-random Signal (QRS) is a signal
repeated every 1 to 24 bits as specified by the
Operation System (OS) application. QRS must
conform to the description in Bellcore TR-NPL-
000054.
(continued)
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ADCP-61-743 • Issue 3 • September 2004
Table 3. RTAU Configuration Fields, continued
FIELD
TYPE
OPTIONS
DESCRIPTION
DEFAULT
SIGNAL GENERATOR SETUP FIELDS, CONTINUED
15
Pattern Type, continued
Toggle
2^15-1
2^23-1
All Ones
2
-1 is a 32,767-bit, pseudo-random pattern
that generates a maximum of 14 sequential 0’s
and 15 sequential 1’s. The pattern provides a
maximum number of 0’s allowed for framed,
non-B8ZS testing. The pattern does not meet
the minimum 1’s density requirement.
23
2
-1 is a 8,388,607-bit, pseudo-random
pattern that generates a maximum of 22
sequential 0’s and 23 sequential 1’s. The
pattern exceeds excess 0’s and does not meet
the minimum 1’s density requirements for T1
applications.
Test of T1 span line. The all-1’s pattern causes
the span line repeater to consume the maximum
amount of power. If the current powering the
span line is low, transmission errors may occur
due to the inter-symbol interference resulting
from the inability of a weak repeater power
supply to develop the energy necessary to
support the transmission of a long sequence of
1’s.
(Framed) All Zeros
Used as a final confirmation that all network
elements in a circuit are properly optioned with
B8ZS for clear channel operation. The framed
all 0’s pattern consisting of a frame bit
followed by an all 0’s payload will only be
applied to circuit optioned with B8ZS for clear
channel operation.
3 in 24
Used to determine the ability of network
equipment to function properly when transporting
signal sequences containing both a maximum of
15 consecutive 0’s during periods of minimum
overall pulse density.
• Unframed = 1000 1000 1000 0000
0000 0000 1000 1000
• Framed =
0100 0100 0000 0000
0000 0100 0100 1000
2 in 8
Used in conjunction with the 1-in-8 pattern.
Useful when performing test to reveal the
presence of incorrectly-optioned AMI or B8ZS
equipment. Use of the 2-in-8 pattern will
confirm the circuits ability to support error-free
transmission.
• Unframed = 0100 0010 0100 0010
• Framed =
0100 0010 0100 0010
(continued)
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ADCP-61-743 • Issue 3 • September 2004
Table 3. RTAU Configuration Fields, continued
FIELD
TYPE
OPTIONS
DESCRIPTION
DEFAULT
SIGNAL GENERATOR SETUP FIELDS, continued
Pattern Type, continued
Toggle
1 in 8
Containing strings of 7 sequential 0’s. It is used
to determine the ability of a circuit to handle
payload signals having minimum 1’s density.
Use of this pattern often reveals the existence
of timing recovery problem under conditions of
low signal density.
• Unframed = 1000 0000 1000 0000
• Framed =
0100 0000 0100 0000
Daly
Daly Pattern (Modified 55 Octet). This is useful
for stressing the timing recovery circuits of line
cards and the preamplifier/ equalizer circuits of
repeaters. The pattern stresses a circuit by
introducing rapid transitions from long sequences
of low density octets to high density octets, high
density octets to low density octets, and rapid
transitions. The pattern may be transmitted framed
or unframed. When framed, the frame bit shall be
inserted at the octet boundaries and will not
overwrite the bits.
User Code
For user-defined patterns of 32 bits or less, set the
Pattern Type field to User Code. The bits can be
entered by typing a string of 0’s or 1’s in the bit
field located to the right of the designated entry.
Pattern Bits
Display None
only
If the Pattern Type field is configured for User
Code, pattern bits will be displayed to the right
of the Pattern type field parameter. This field’s
name is not shown on the screen. If no User
Code is entered in the Pattern Type field, this
field displays 32 dashes.
None
Frame Format
Toggle
UNFRAMED
Unframed data pattern.
Used for SLC framing.
Super Frame
UNFRAMED
(continued)
Ft ONLY
SF
ESF
Extended Super Frame
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ADCP-61-743 • Issue 3 • September 2004
Table 3. RTAU Configuration Fields, continued
FIELD
TYPE
OPTIONS
DESCRIPTION
DEFAULT
SIGNAL GENERATOR SETUP FIELDS, continued
Loop Code
Toggle
OVERVIEW: The Mode field must be set to a
SPLT option before the Loop Code field can be
configured. Loop codes will be transmitted until
the RTAU detects a change in the signal being
received. At that time, the pattern selected before
the loop code was set will be transmitted. For
example, when sending a Loop Up code, the
RTAU will restore the original pattern after it
receives the loop code it is transmitting, indicating
that the circuit is looped up. Note that the Loop
Code bits are displayed in the Loop Code bit field
as each code is selected. This is provided as a
convenience to the operator who may not know
the name chosen for the loop code but does know
the pattern.
NONE
NONE
Disables any active loop code selected for this
field. When NONE is selected, the Loop Code
field displays 16 dashes.
Line Loop Up
10000
Line Loop Down
4-Bit Loop Up
100
1100
4-Bit Loop Down
5-Bit Loop Up
1110
11000
5-Bit Loop Down
ESF CSU Loop Up
11100
0EFF (0000 1110 1111 1111)
38FF (0011 1000 1111 1111)
ESF CSU Loop
Down
ESF NI* Loop Up
12FF (0001 0010 1111 1111)
24FF (0010 0100 1111 1111)
14FF (0001 0100 1111 1111)
ESF NI* Loop Down
ESF CSU Payload
Loop Up
ESF CSU Payload
Loop Down
32FF (0011 0010 1111 1111)
User Loop Up
Enter a 16-value expression using only 1’s, 0’s,
or “-”. The bits can be entered by typing a
string of 0’s or 1’s in the bit field located to the
right of the designated entry.
(toggle and input)
User Loop Down
Enter a 16-value expression using only 1’s, 0’s,
or “-”. The bits can be entered by typing a
string of 0’s or 1’s in the bit field located to the
right of the designated entry.
*Note: “NI” means Network Interface device.
(continued)
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ADCP-61-743 • Issue 3 • September 2004
Table 3. RTAU Configuration Fields, continued
FIELD
TYPE
OPTIONS
DESCRIPTION
DEFAULT
BIT ERROR SETUP FIELDS
OVERVIEW: Bit errors can be injected by the RTAU using the Bit Error Set Up fields. These sections are display-only fields that are
only displayed when the line code setting is INTERNAL. The Status field always shows the current status if the line code is
INTERNAL, but the Error Counts and Elapsed Time fields only show a value when a measurement is being made.
Error Count
Input
Range of 0 to 1544
Select either Error Count or Error Rate for bit
error setup. Both cannot be set at the same time.
If single errors or a burst of errors is desired, set
the Error Count field to the number of errors to
insert. If the Error Count field is set, the
number of errors will be transmitted each time
the Enter key is pressed.
0
Error Rate
Error Locn
Toggle
Toggle
OFF, 1E-3, 1E-4,
1E-5, 1E-6, 1E-7
Select either Error Count or Error Rate for bit
error setup. Both cannot be set at the same time.
If a steady error rate is desired, set the Error
Rate field which indicates the rate bit or frame
errors are injected.
OFF
OVERVIEW: The Error Location field must be
set to either PAYLOAD or FBE if the count or
rate field is set. Pressing the Enter or Return
key will cause the RTAU to send the errors.
NONE
NONE
Indicates count is 0 and rate is off.
Bit errors are injected.
PAYLOAD
FBE
Frame Bit Error. Frame errors are injected.
Eight-digit counter or blank.
Error Counts Data
Error Counts BPV
Error Counts Frame
Error Counts CRC
Error Counts COFA
Status F Sync
Display None
only
Blank
Blank
Blank
Blank
Blank
Blank
Blank
Blank
Display None
only
Eight-digit counter or blank.
Eight-digit counter or blank.
Eight-digit counter or blank.
Eight-digit counter or blank.
* or blank
Display None
only
Display None
only
Display None
only
Display None
only
Status P Sync
Display None
only
* or blank
Status RAI
Display None
only
* or blank
(continued)
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ADCP-61-743 • Issue 3 • September 2004
Table 3. RTAU Configuration Fields, continued
FIELD
TYPE
OPTIONS
DESCRIPTION
DEFAULT
Elapsed Time ES
Display None
only
Six-digit counter or blank.
Blank
Elapsed Time EFS
Display None
only
Six-digit counter or blank.
Blank
60
Test Timeout in Minutes
Input
0 to 1440
Timeout counter for test access. If the counter
is set to a number higher than “0” and then
reaches “0” during test, the Mode field will be
set to DISABLE automatically. If the counter is
set to “0”, the test timeout will be turned off,
and the test will have unlimited time.
Measurement
Toggle
and
OVERVIEW: Start a measurement by selecting
START at the Measurement field. The RTAU will
wait for pattern sync and frame sync for framed
patterns before starting the measurement. After
synchronizing, the measurement display will
change to RUNNING. Stop any measurement by
selecting STOP. Refer to Figure 17 for a RTAU
configuration screen showing a test that is starting.
STOP
Display
Note: If the Mode is set to MONE, MONF,
LOOPE, or LOOPF, only frame sync is required
before starting the measurement. If the pattern is
not in sync, then the Data Error Counts will read
“N/A” until pattern sync is established.
START
STOP
Initiate measurement.
Terminate measurement. Note: Setting the
Mode field to DISABLE also stops any
measurement in progress as if the Measurement
field had been set to STOP.
RUNNING (display)
Measurement active.
Waiting on Sync
Display None
only
This parameter is displayed to the right of the
Measurement field when the Measurement field
is set to START. The WAITING ON SYNC
message is display-only; it only shows up when
the RTAU is waiting for either frame or pattern
sync. Examine the status section to determine
what sync is needed.
Blank
Mode
Toggle
DISABLE
To end the test session, restore the tested circuit to
normal operation by selecting DISABLE.
DISABLE
Page 23
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ADCP-61-743 • Issue 3 • September 2004
MPU
or
SCU
BIPOLAR
ACCESS
RTAU
DS3 MUX
RTAU
FRONT
PANEL
DS1 TEST
SET
RX
PATTERN GEN
DETECTOR
TX
LINE
CARD
DS3
EQUIPMENT
CONTROLLER
A
B
DS1
FACILITY
MONITOR
SPLIT
11864-C
Figure 8. RTAU Test Configuration Block Diagram
EQUIPMENT (E)
[NETWORK]
FACILITY (F)
[CUSTOMER]
EQUIPMENT (E)
[NETWORK]
FACILITY (F)
[CUSTOMER]
DS3 MUX
DS3 MUX
A
A
B
B
CIRCUIT
CIRCUIT
UNDER TEST
UNDER TEST
B
A
MONF
MONE
SIGNAL
SIGNAL
PRESENCE
DETECTOR
PRESENCE
DETECTOR
RTAU
RTAU
11865-C
Figure 9. MONF and MONE
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ADCP-61-743 • Issue 3 • September 2004
EQUIPMENT (E)
[NETWORK]
FACILITY (F)
[CUSTOMER]
EQUIPMENT (E)
[NETWORK]
FACILITY (F)
[CUSTOMER]
DS3 MUX
DS3 MUX
CIRCUIT
CIRCUIT
UNDER TEST
UNDER TEST
SPLTB
SPLTA
SIGNAL
SIGNAL
A
B
PRESENCE
DETECTOR
PRESENCE
DETECTOR
A
B
RTAU
RTAU
TEST SIGNAL
GENERATOR
TEST SIGNAL
GENERATOR
11866-B
Figure 10. SPLTB and SLPTA
OFFICE A
OFFICE Z
INTEROFFICE
FACILITY
A END
Z END
RTAU
A
RTAU
A
E
F
F
E
INSERT:
NETWORK
DROP:
CUSTOMER
LOOPBACK
LOOPBACK
B
B
CPE
CPE
SPLTB
A = "A" TRANSMISSION PATH
B = "B" TRANSMISSION PATH
E = EQUIPMENT (NETWORK)
F = FACILITY (CUSTOMER)
11867-B
= SIGNAL PRESENCE DETECTOR
= TEST SIGNAL GENERATOR
OR UNFRAMED (QRS)
Figure 11. Typical Round-Robin Test Configuration
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ADCP-61-743 • Issue 3 • September 2004
OFFICE A
INTEROFFICE
FACILITY
OFFICE Z
A
A END
Z END
RTAU
A
F
E
E
F
INSERT:
NETWORK
DROP:
NETWORK
LOOPBACK
B
B
CPE
CPE
QRS
SPLTE
A = "A" TRANSMISSION PATH
B = "B" TRANSMISSION PATH
E = EQUIPMENT (NETWORK)
F = FACILITY (CUSTOMER)
= SIGNAL PRESENCE DETECTOR
11868-B
= TEST SIGNAL GENERATOR
OR UNFRAMED (QRS)
= TERMINATED SIGNAL
Figure 12. Typical End Test Configuration
EQUIPMENT (E)
[NETWORK]
FACILITY (F)
[CUSTOMER]
EQUIPMENT (E)
[NETWORK]
FACILITY (F)
[CUSTOMER]
DS3 MUX
DS3 MUX
A
A
B
B
CIRCUIT
CIRCUIT
UNDER TEST
UNDER TEST
SPLTF
SPLTE
SIGNAL
PRESENCE
DETECTOR
TEST SIGNAL
GENERATOR
QRS
QRS
RTAU
RTAU
SIGNAL
PRESENCE
DETECTOR
TEST SIGNAL
GENERATOR
11869-B
Figure 13. SPLTF and SLPTE
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ADCP-61-743 • Issue 3 • September 2004
INTEROFFICE
FACILITY
OFFICE A
RTAU
A
OFFICE Z
Z END
RTAU
A END
F
E
E
A
F
DROP:
CUSTOMER
DROP:
NETWORK
INSERT:
CUSTOMER
INSERT:
NETWORK
INSERT:
CUSTOMER
INSERT:
NETWORK
B
B
CPE
CPE
QRS
QRS
SPLTF
SPLTE
A = "A" TRANSMISSION PATH
B = "B" TRANSMISSION PATH
E = EQUIPMENT (NETWORK)
F = FACILITY (CUSTOMER)
= SIGNAL PRESENCE DETECTOR
= TEST SIGNAL GENERATOR
OR UNFRAMED (QRS)
= TERMINATED SIGNAL
11870-B
Figure 14. Typical Point-to-Point Test Configuration
EQUIPMENT (E)
[NETWORK]
FACILITY (F)
[CUSTOMER]
EQUIPMENT (E)
[NETWORK]
FACILITY (F)
[CUSTOMER]
DS3 MUX
DS3 MUX
A
A
B
B
CIRCUIT
CIRCUIT
UNDER TEST
UNDER TEST
SPLTFL
SPLTEL
SIGNAL
PRESENCE
DETECTOR
TEST SIGNAL
GENERATOR
RTAU
RTAU
SIGNAL
PRESENCE
DETECTOR
TEST SIGNAL
GENERATOR
11871-B
Figure 15. SPLTFL and SPLTEL
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ADCP-61-743 • Issue 3 • September 2004
EQUIPMENT (E)
[NETWORK]
FACILITY (F)
[CUSTOMER]
EQUIPMENT (E)
[NETWORK]
FACILITY (F)
[CUSTOMER]
DS3 MUX
DS3 MUX
A
A
B
B
CIRCUIT
CIRCUIT
UNDER TEST
UNDER TEST
LOOPF
LOOPE
SIGNAL
SIGNAL
PRESENCE
DETECTOR
PRESENCE
DETECTOR
QRS
QRS
RTAU
RTAU
11872-B
Figure 16. LOOPF and LOOPE
RTAU SETUP AND CONTROL
EQUIPMENT SETUP
===============
Current User : CRAFT
Test Circuit: 1-2
Line Code
: INTERNAL
Mode
: SPLTE
SIGNAL GENERATOR SETUP
======================
Pattern Type : QRS
#:
--------------------------------
Frame Format : ESF
Loop Code
: NONE
#:
----------------
BIT ERROR SETUP
===============
Error Count : 0
Error Rate : OFF
Error Locn : N/A
Error Counts
============
Data :
BPV :
Frame:
Status
======
F Sync: * ES :
P Sync: * EFS:
RAI :
Elapsed Time
============
CRC:
COFA
Test Timeout : 60
Measurement : START
WAITING ON SYNC
In Minutes
Press CONTROL-A For Assistance
Figure 17. RTAU Setup and Control Screen (Starting a Measurement)
6 TL1 COMMANDS
The TL1 commands shown in Table 4 that are used for the RTAU are defined in Bellcore
requirement GR-000834-CORE. For more information about TL1 commands, refer to the
Soneplex System Operation and Maintenance Manual listed under Related Publications at the
beginning of this manual.
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ADCP-61-743 • Issue 3 • September 2004
Table 4. TL1 Commands Used for the RTAU
COMMAND
DESCRIPTION
CHG-ACCMD-T1
CHG-LPBK-T1
CHG-TSTSIG-T1
CONN-TACC-T1
DISC-MEAS
Change Access Mode T1
Change Loopback T1
Change Test Signal T1
Connect Test Access T1
Disconnect Measurement
Disconnect Test Access Metallic/Digital
Disconnect Test Signal
Measure Signal T1
DISC-TACC
DISC-TSTSIG
MEAS-SIG-T1
REPT-RSLT
Report Result
TST-INSERRBITS
Test Insert Error Bits
7 SPECIFICATIONS
The technical specifications for the RTAU modules are given in Table 5.
Table 5. RTAU Specifications
PARAMETER
SPECIFICATION
REMARKS
Input Power
Input Current (Max.)
Input Current (Nominal)
Input Voltage (Nominal)
Input Voltage Range
175 mA at –48 Volts
100 mA at –48 Volts
–48 Vdc
–42 to –60 Vdc
8.2 watts
Power Consumption /
Dissipation (Max.)
DS1 Jack Access
Electrical Interface
Termination
Bipolar
100 ohms nominal ± 5%
Bantam
Jack Type
Line Code
AMI or B8ZS
Controlled by front panel switch
Line Rate
1.544 Mbps ± 130 ppm max.
Dimensions
Height × Width × Depth
9.5 × 9.9 × 1.0 inches
(24.1 × 25.1 × 2.5 cm)
Weight
12 oz. (.34 kg)
Environment
Operating Temperature
Storage Temperature
–40° to 149° F (–40° to 65° C)
–40° to 158° F (–40° to 70° C)
Relative Humidity (Operating) 5% to 95%
No condensation
Altitude (Operating
or Non-operating)
–1,312 to + 14,764 ft.
(–400 to +4,500 m)
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ADCP-61-743 • Issue 3 • September 2004
8 CUSTOMER INFORMATION AND ASSISTANCE
ADC Technical support is available 24 hours a day, 7 days a week by contacting the ADC
Technical Assistance Center.
Sales Assistance
800.366.3891
• Quotation Proposals
• Ordering and Delivery
• General Product Information
Systems Integration
800.366.3891
• Complete Solutions (from Concept to Installation)
• Network Design and Integration Testing
• System Turn-Up and Testing
• Network Monitoring (Upstream or Downstream)
• Power Monitoring and Remote Surveillance
• Service/Maintenance Agreements
• Systems Operation
ADC Technical Assistance Center
800.366.3891
• Technical Information
• System/Network Configuration
• Product Specification and Application
• Training (Product-Specific)
Email: [email protected]
• Installation and Operation Assistance
• Troubleshooting and Repair/Field Assistance
Online Technical Support
Online Technical Publications
Product Return Department
800.366.3891
• ADC Return Authorization number and instructions must
be obtained before returning products.
E-Mail: [email protected]
Product information may also be obtained using the ADC web site at www.adc.com or by writing ADC Telecommunications, Inc.,
P.O. Box 1101, Minneapolis, MN 55440-1101, U.S.A.
Contents herein are current as of the date of publication. ADC reserves the right to change the contents without prior notice. In no
event shall ADC be liable for any damages resulting from loss of data, loss of use, or loss of profits and ADC further
disclaims any and all liability for indirect, incidental, special, consequential or other similar damages. This disclaimer of
liability applies to all products, publications and services during and after the warranty period.
This publication may be verified at any time by contacting ADC’s Technical Assistance Center at 1-800-366-3891 or by writing to
ADC Telecommunications, Inc., Attn: Technical Assistance Center, P.O. Box 1101, Minneapolis, MN 55440-1101, U.S.A.
Product Catalog: SPX-RTAU0A11
Part Number: 1169023
CLEI: SNPQCN2D~~
Document: ADCP-61-743, Issue 3
1304058
´-$%¶8K¨
September 17, 2004
© 2004, ADC Telecommunications, Inc.
All Rights Reserved
Printed in U.S.A.
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