ADTRAN Two Way Radio ISU 2X64 User Manual

ISU 2x64  
Dual Port ISDN Service Unit  
User Manual  
Part Numbers  
1200051L1  
1200051L2  
1200051L5  
1200051L6  
U-Interface Version, 110 VAC  
S/T-Interface Version, 110 VAC  
S/T-Interface International, 110 VAC  
S/T-Interface International, 230 VAC  
61200051L1-1D  
June 1998  
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FCC regulations require that the following information be provided in this manual:  
1. This equipment complies with Part 68 of the FCC rules. On  
the bottom of the equipment housing is a label that shows the  
FCC registration number and Ringer Equivalence Number  
(REN) for this equipment. If requested, provide this informa-  
tion to the telephone company.  
2. If this equipment causes harm to the telephone network, the  
telephone company may temporarily discontinue service. If  
possible, advance notification is given, otherwise, notification is  
given as soon as possible. The telephone company will advise  
the customer of the right to file a complaint with the FCC.  
3. The telephone company may make changes in its facilities,  
equipment, operations, or procedures that could affect the  
proper operation of this equipment; advance notification and  
the opportunity to maintain uninterrupted service is given.  
4. If experiencing difficulty with this equipment, please contact  
ADTRAN for repair and warranty information. The tele-  
phone company may require this equipment to be discon-  
nected from the network until the problem is corrected, or it  
is certain the equipment is not malfunctioning.  
5. This unit contains no user serviceable parts.  
6. An FCC compliant telephone cord with a modular plug is pro-  
vided with this equipment. In addition, an FCC compliant ca-  
ble appropriate for the dial backup option ordered is provided  
with this equipment. This equipment is designed to be connect-  
ed to the telephone network or premises wiring using an FCC  
compatible modular jack, which is Part 68 compliant.  
7. The following information may be required when applying  
to the local telephone company for leased line facilities.  
Service Type  
Digital Facility  
Interface Code  
Service Order Code  
Network Jacks  
ISDN  
02IS5  
6.0F  
RJ-49C  
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FEDERAL COMMUNICATIONS COMMISSION  
RADIO FREQUENCY INTERFERENCE STATEMENT  
This equipment has been tested and found to comply with the limits for a 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  
radio frequencies. 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.  
Shielded cables must be used with this unit to ensure compliance with Class A FCC limits.  
Changes or modifications to this unit not expressly approved by the party responsible  
for compliance could void the user's authority to operate the equipment.  
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CANADIAN EMISSIONS REQUIREMENTS  
This digital apparatus does not exceed the Class A limits for radio noise emissions from digital  
apparatus as set out in the interference-causing equipment standard entitled "Digital Appara-  
tus," ICES-003 of the Department of Communications.  
Cet appareil numerique respecte les limites de bruits radioelectriques applicables aux appareils  
numeriques de Class A prescrites dans la norme sur le materiel brouilleur: "Appareils Numer-  
iques," NMB-003 edictee par le ministre des Communications.  
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CANADIAN EQUIPMENT LIMITATIONS  
Notice: The Canadian Industry and Science Canada label identifies certified equipment. This  
certification means that the equipment meets certain telecommunications network protective,  
operational, and safety requirements. The Department does not guarantee the equipment will  
operate to the user’s satisfaction.  
Before installing this equipment, ensure that it is permissible to be connected to the facilities  
of the local telecommunications company. The equipment must also be installed using an  
acceptable method of connection. In some cases, the company’s inside wiring associated with  
a single-line individual service may be extended by means of a certified connector assembly  
(telephone extension cord). Compliance with the above conditions may not prevent degrada-  
tion of service in some situations.  
Repairs to certified equipment should be made by an authorized Canadian maintenance facility  
designated by the supplier. Any repairs or alterations made by the user to this equipment, or  
equipment malfunctions, may give the telecommunications company cause to request the user  
to disconnect the equipment.  
Users should ensure for their own protection that the electrical ground connections of the  
power utility, telephone lines, and internal metallic water pipe system, if present, are connected  
together. This precaution may be particularly important in rural areas.  
Users should not attempt to make such connections themselves, but should  
contact the appropriate electric inspection authority, or an electrician, as  
appropriate.  
The Load Number (LN) assigned to each terminal device denotes the percentage of the total  
load to be connected to a telephone loop which is used by the device, to prevent overloading.  
The termination on a loop may consist of any combination of devices subject only to the  
requirement that the total of the Load Numbers of all devices does not exceed 100.  
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Table of Contents  
Chapter 1. Understanding ISDN and the ISU 2x64...................................................... 1  
ISDN Overview ..................................................................................................................... 1  
The ADTRAN ISU 2x64........................................................................................................ 1  
ISU 2x64 Interoperability ..................................................................................................... 4  
ISU 2x64 Single Port Operation........................................................................................... 4  
Recommended Operating Protocols................................................................................... 6  
Chapter 2. ISDN Service.................................................................................................... 9  
ISDN Ordering Codes .......................................................................................................... 9  
Chapter 3. Installation...................................................................................................... 13  
Network Connection ......................................................................................................... 13  
DTE Data Connection......................................................................................................... 14  
Maintenance interface......................................................................................................... 15  
Dial Interface Connection .................................................................................................. 16  
Chapter 4. Operation ........................................................................................................ 17  
Menu Navigation ................................................................................................................ 17  
Front Panel DTE Indicators .......................................................................................... 18  
VT 100 Menu Support ................................................................................................... 19  
Getting Started..................................................................................................................... 19  
Status Buffer.................................................................................................................... 20  
Status Screen................................................................................................................... 21  
Configuration Screen..................................................................................................... 22  
Chapter 5. Testing ............................................................................................................. 23  
Test Options ......................................................................................................................... 23  
Loopback DTE................................................................................................................ 24  
Loopback Network ........................................................................................................ 24  
Loopback Protocol ......................................................................................................... 24  
Loopback Remote........................................................................................................... 25  
Test Remote..................................................................................................................... 25  
Loopback Disable........................................................................................................... 25  
NEBE/FEBE.................................................................................................................... 26  
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Table of Contents  
Software Version ............................................................................................................ 26  
Loopback Both DTEs ..................................................................................................... 26  
Test 2047 Both................................................................................................................. 26  
Chapter 6. Configuration .................................................................................................27  
Dial Line Operation............................................................................................................. 27  
Setting the Switch Protocol........................................................................................... 28  
Setting the Call Type...................................................................................................... 31  
Speech..................................................................................................................... 31  
Audio ...................................................................................................................... 31  
Data 56kbps............................................................................................................ 31  
Data 64kbps............................................................................................................ 31  
Smart Dial Strings .......................................................................................................... 32  
Setting the Terminal ID ................................................................................................. 32  
Setting the SPID..................................................................................................... 32  
Setting the LDN..................................................................................................... 33  
Setting the Busy Out Port.............................................................................................. 33  
Enabled................................................................................................................... 34  
Disabled.................................................................................................................. 34  
Setting the Dial Options ................................................................................................ 34  
Front Panel............................................................................................................. 34  
RS-366 ..................................................................................................................... 34  
AT Commands ...................................................................................................... 36  
V.25.......................................................................................................................... 39  
Disabled.................................................................................................................. 42  
Setting Auto Answer ..................................................................................................... 42  
Disabled................................................................................................................. 42  
Enabled................................................................................................................... 43  
Dump all calls........................................................................................................ 43  
Setting Answer Tone...................................................................................................... 43  
No Answer tone (Default) ................................................................................... 44  
Incoming tone........................................................................................................ 44  
Outgoing tone........................................................................................................ 44  
Always tone ........................................................................................................... 44  
Setting Connect Timout................................................................................................. 45  
Setting Call Screening.................................................................................................... 45  
SBus Termination ........................................................................................................... 46  
Leased Line Service............................................................................................................ 47  
Clock Mode: Slave/Master......................................................................................... 47  
Channel Rate................................................................................................................... 48  
SBus Termination ........................................................................................................... 49  
DTE Options for Asynchronous and Synchronous Operation................................ 50  
Bit Rate.................................................................................................................... 51  
Connector Type..................................................................................................... 51  
RTS Options........................................................................................................... 51  
CTS Options........................................................................................................... 51  
CD Options ............................................................................................................ 51  
DTR Options.......................................................................................................... 52  
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Table of Contents  
DSR Options .......................................................................................................... 52  
Flow Control (asynchronous data format)........................................................ 52  
Data Format (asynchronous)............................................................................... 53  
Transmit Clock (synchronous data format)...................................................... 53  
Autobaud ........................................................................................................................ 54  
Setting Protocol Options ............................................................................................... 55  
Clear Channel........................................................................................................ 56  
BONDING mode 1 ............................................................................................... 56  
TXINIT............................................................................................................. 57  
TXFA................................................................................................................ 57  
TXADD01........................................................................................................ 57  
TXDEQ ............................................................................................................ 58  
TANULL ......................................................................................................... 58  
TCID ................................................................................................................ 58  
Async. Rev. ..................................................................................................... 58  
V.120 ....................................................................................................................... 58  
V.110 ....................................................................................................................... 59  
DSU 57.6 ASYNC.................................................................................................. 59  
T-Link ..................................................................................................................... 59  
SAP.......................................................................................................................... 59  
FALLBACK............................................................................................................ 60  
Point-to-Point (PPP) Async-to-Sync................................................................... 61  
Point-to-Point Protocol (PPP) ...................................................................... 62  
Multilink PPP ................................................................................................. 62  
PPP with Compression ................................................................................. 62  
Chapter 7. Dial Options ................................................................................................... 63  
Front Panel Dialing Options.............................................................................................. 63  
Hang up line ................................................................................................................... 64  
Dial number ................................................................................................................... 64  
Redial last #.................................................................................................................... 64  
Answer Call .................................................................................................................... 64  
Dial stored #.................................................................................................................... 64  
Store/Review # .............................................................................................................. 64  
Chapter 8. Quick Setup.................................................................................................... 65  
Quick Setup Configuration................................................................................................ 65  
Quick Setup.......................................................................................................................... 66  
Dial 56K sync* ....................................................................................................... 66  
Dial 64K sync* ....................................................................................................... 67  
Dial 112K sync* ..................................................................................................... 67  
Dial 128K sync* ..................................................................................................... 68  
Dial 57.6 asyn*....................................................................................................... 68  
Dial 115.2 asyn*..................................................................................................... 69  
Fallback 57.6k*....................................................................................................... 69  
Leased 64K............................................................................................................. 70  
Ldm 64K Master.................................................................................................... 70  
Factory Setup......................................................................................................... 71  
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Table of Contents  
Chapter 9. Security and Remote Configuration ..........................................................73  
Security ................................................................................................................................. 73  
Set Password................................................................................................................... 74  
Lock Keypad ................................................................................................................... 74  
Remote Config .................................................................................................................... 74  
Cfg. Rmt. Unit................................................................................................................. 75  
Set Password................................................................................................................... 75  
Lpbk remote 1B............................................................................................................... 75  
Lpbk remote 2B............................................................................................................... 75  
Chapter 10. Troubleshooting...........................................................................................77  
If Self Test Fails.............................................................................................................. 77  
If The ISU 2x64 Does Not Read Ready....................................................................... 77  
If the Wrong DTE Port Answers a Call....................................................................... 83  
If you Cannot Connect Calls......................................................................................... 84  
Chapter 11. Specifications  
Network Interface.......................................................................................... 85  
DTE Interface.................................................................................................. 85  
Dialing Selections........................................................................................... 85  
Data Rates (Network).................................................................................... 85  
Data Rates (DTE)............................................................................................ 86  
B Channel Aggregation................................................................................. 86  
Rate Adaptation ............................................................................................. 86  
Interoperability............................................................................................... 86  
Switch Compatibility..................................................................................... 86  
Display............................................................................................................. 87  
Environmental................................................................................................ 87  
Physical............................................................................................................ 87  
Power............................................................................................................... 87  
Appendix A. AT Commands...........................................................................................89  
Appendix B. Current Status Messages..........................................................................95  
Appendix C. Status Buffer Messages ............................................................................99  
Appendix D. S-Register List..........................................................................................109  
Appendix E. Connector Pinouts ...................................................................................119  
Appendix F. Ordering ISDN Without IOCs ..............................................................125  
Acronyms ...........................................................................................................................135  
Glossary..............................................................................................................................137  
Index ...................................................................................................................................145  
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List of Figures  
Figure 1-1:  
Figure 1-2:  
Figure 1-3:  
Figure 3-1:  
Figure 4-1:  
Figure 4-2:  
Figure 4-3:  
Figure 5-1:  
Figure 5-2:  
Figure 5-3:  
Figure 6-1:  
Figure 6-2:  
Figure 6-3:  
Figure 6-4:  
Figure 6-5:  
Figure 6-6:  
Figure 6-7:  
Figure 6-8:  
Figure 6-9:  
Figure 6-10:  
Figure 6-11:  
Figure 6-12:  
Figure 6-13:  
Figure 6-14:  
Figure 6-15:  
Figure 6-16:  
Figure 6-17:  
Figure 6-18:  
Figure 6-19:  
ISU 2x64 Rear Panel .................................................................................. 2  
ISU 2x64 Front Panel................................................................................. 4  
ISU 2x64 Interoperability ......................................................................... 5  
VT 100 Maintenance Help Screen ......................................................... 15  
Current Status Menu............................................................................... 18  
VT 100 Status Screen ............................................................................... 21  
VT 100 Configuration Screen................................................................. 22  
VT 100 Test Menu Screen ....................................................................... 23  
Test Menu Tree ........................................................................................ 24  
Loopback Points ...................................................................................... 24  
Dial Line Menu Tree ............................................................................... 27  
VT 100 Configuration Menu Screen ..................................................... 28  
LCD Configuration Menu Tree ............................................................. 29  
Dial Options, RS-366 Menu Tree........................................................... 35  
Dial Options, V.25 bis Menu Tree......................................................... 39  
Dial Line, Auto Answer Menu Tree ..................................................... 40  
Data Bits Menu Tree................................................................................ 41  
V.25 bis ASYNC Menu Tree................................................................... 41  
Answer Tone Menu Tree........................................................................ 44  
Connect Timout Menu Tree................................................................... 45  
Call Screening Menu Tree ...................................................................... 45  
SBus Termination Menu Tree................................................................ 46  
Leased Line Menu Tree .......................................................................... 47  
Limited Distance Modem Applications ............................................... 48  
Leased Application with Channel Banks............................................. 48  
Asynchronous DTE Options Menu Tree.............................................. 50  
Synchronous DTE Options Menu Tree ................................................ 50  
Flow Control Menu Tree ........................................................................ 53  
Data Format Menu Tree ......................................................................... 53  
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List of Figures  
Figure 6-20:  
Figure 6-21:  
Figure 6-22:  
Figure 6-23:  
Figure 7-1:  
Figure 7-2:  
Figure 8-1:  
Figure 9-1:  
Figure 9-2:  
Figure E-1:  
Figure E-2:  
Figure E-3:  
Figure E-4:  
Figure E-5:  
Transmit Clock Menu Tree..................................................................... 54  
Protocol Menu Tree................................................................................. 55  
Protocol BONDING, Mode 1 Menu Tree............................................. 57  
PPP Menu Tree........................................................................................ 61  
VT 100 Dial Options Screen.................................................................... 63  
Dial Menu Tree ........................................................................................ 63  
Quick Setup Menu Tree.......................................................................... 65  
Security Menu Tree ................................................................................. 73  
Remote Config Menu Tree ..................................................................... 74  
EIA-232 Interface ................................................................................... 119  
RS-530 Interface..................................................................................... 120  
V.35 Interface.......................................................................................... 120  
RS-366 Interface...................................................................................... 121  
RJ-45 Dial Line Connector U Interface ................................................122  
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List of Tables  
Table 1-A:  
Table 1-B:  
Table 6-A:  
Table 10-A:  
Table E-A:  
Table E-B:  
Table E-C:  
Table E-D:  
Table E-E:  
Table E-F:  
Table E-G:  
Table F-A:  
Table F-B:  
DTE Indicators....................................................................................... 3  
Recommended Operating Modes ....................................................... 7  
Rate Adaptation Protocols ................................................................... 60  
Troubleshooting Calls........................................................................... 84  
EIA-232 Interface ................................................................................... 119  
RS-530 Interface .................................................................................... 120  
V.35 Interface.......................................................................................... 121  
RS-366 Interface ..................................................................................... 122  
RJ-45 Dial Line Connector U Interface ............................................... 122  
RJ-45 Dial Line Connector S/T Interface ........................................... 123  
Maintenance Connector........................................................................ 123  
5ESS Features ........................................................................................ 131  
DMS Features......................................................................................... 132  
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List of Tables  
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Chapter 1  
Understanding ISDN and the ISU 2x64  
ISDN OVERVIEW  
The Integrated Services Digital Network (ISDN) is a public or pri-  
vate switched digital network. ISDN is an international standard  
for digital communications, allowing a full range of enhanced ser-  
vices supporting voice, data, and image applications through  
standard interfaces over a single pair of telephone wires. ISDN  
provides a means of integrating these services and modernizing  
communication networks for information movement and man-  
agement efficiency.  
THE ADTRAN ISU 2X64  
ADTRAN’s ISU™ 2x64 is a stand-alone ISDN service unit that  
connects data terminal equipment to the ISDN network. The ISU  
2x64 is a dual-port ISDN terminal adapter available with an op-  
tional integrated NT1. The ISU 2x64 supports two applications at  
data rates of up to 64 kbps on each DTE interface, or one applica-  
tion using a data rate greater than 64 kbps (maximum 128 kbps)  
on a single DTE interface. Target applications for the ISU 2x64 in-  
clude video conferencing, audio broadcasting, and as dual mo-  
dem replacement.  
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Chapter 1.Understanding ISDN and the ISU 2x64  
The ISU 2x64 features two RS-530/EIA-232 DTE interfaces and  
two RS-366 dial interfaces (see Figure 1-1). An RS-530/EIA-232-  
to-V.35 adapter is available to support V.35 DTE interfaces. Syn-  
chronous data transfer rates from 2400 bps to 128 kbps and asyn-  
chronous rates from 1200 bps to 115.2 kbps are supported on a  
single DTE interface. Synchronous data transfer rates from 2400  
bps to 64 kbps and asynchronous rates from 1200 bps to 57.6 kbps  
are supported when using two DTE interfaces. For speeds over 64  
kbps using a single DTE interface, the industry standard BOND-  
ING protocol aggregates the two 64 kbps B channels for a maxi-  
mum of 128 kbps.  
Dialing from the ISU 2x64 is accomplished in a variety of ways:  
Dialing manually from the front panel  
Dialing automatically from stored numbers  
Dialing through two RS-366 parallel dial interfaces (as in vid-  
eo conferencing applications)  
Dialing over the DTE interfaces using AT command  
V.25 bis in-band dialing (used in applications such as LAN/  
WAN bridging)  
Dialing when DTR is asserted (some Bridge/Routers raise  
DTR when bandwidth on their dedicated line is exceeded)  
ISDN IFC  
POWER  
DTE#2  
RS530A / RS232  
DTE#1  
RS530A / RS232  
ON  
OFF  
RS366 DIALING PORT  
RS366 DIALING PORT  
MAINTENANCE  
Figure 1-1  
ISU 2x64 Rear Panel  
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Chapter 1. Understanding ISDN and the ISU 2x64  
The ISU 2x64 allows the user to migrate ISDN into existing net-  
work services and data communications equipment. The ISU  
2x64 interoperates with ISU 128s, Switched 56 DSUs, various  
ISDN terminal adapters, and BONDING inverse multiplexers  
(for example ASCEND®, PROMPTUS, and Teleos®). For  
instance, in a video conferencing application, this compatibility  
allows the ISU 2x64 to interoperate with networks utilizing two  
Switched 56 DSUs.  
The ISU 2x64 front panel accommodates a 2-line by 16-character  
LCD display. Seven LED indicators monitor data flow and dis-  
play the status of key DTE interface leads (see Table 1-A and Fig-  
ure 1-2). A front panel keypad supports configuration, test  
modes, test status, and dialing.  
Table 1-A  
DTE Indicators  
Indicator  
Definition  
RS  
Request to Send. Indicates the DTE is ready to  
transmit.  
CS  
TD  
RD  
CD  
TR  
Clear to Send. Indicates the ISU 2x64 is ready  
to transmit.  
Transmit Data. On when the DTE is transmitting  
to the ISU 2x64.  
Receive Data. On when the ISU 2x64 is receiv-  
ing data from the far end.  
Carrier Detect. On when the ISU 2x64 is con-  
nected to a remote unit.  
Data Terminal Ready from DTE. On when DTR is  
active at DTE interface.  
SR  
Data Set Ready.  
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Chapter 1.Understanding ISDN and the ISU 2x64  
ISU 2X64  
1
4
2
5
3
6
ENTER  
7
8
0
9
RS CS TD RD CD TR SR  
CANCEL  
#
*
Figure 1-2  
ISU 2x64 Front Panel  
ISU 2X64 INTEROPERABILITY  
Telephone networks are evolving from analog technologies to  
digital technologies such as ISDN. This transition is time-consum-  
ing and costly for the telephone companies and upgrading all lo-  
cations and facilities is a lengthy process.  
The ISU 2x64 bridges this transition by supporting communica-  
tions with existing and future network services and equipment.  
The ISU 2x64 supports communications with Switched 56 Service  
and Switched 56 DSUs (2-wire and 4-wire) as well as various  
ISDN terminal adapters, ISDN terminal equipment, and BOND-  
ING-compatible Inverse Multiplexers.  
Figure 1-3 illustrates the ISU 2x64 operation in various switched  
network services and customer premises products.  
ISU 2X64 SINGLE PORT OPERATION  
The ADTRAN ISU 2x64 is designed to operate over multipoint  
ISDN lines in North America that will require two Service Profile  
Identification (SPID) numbers from the telephone company when  
the ISDN lines are installed. These SPID numbers tell the ADT-  
RAN ISU 2x64 which port or DTE# to route incoming and outgo-  
ing calls. See Ordering ISDN Without IOCs on page 125 for further  
details on ordering multipoint ISDN service.  
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Chapter 1. Understanding ISDN and the ISU 2x64  
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Chapter 1.Understanding ISDN and the ISU 2x64  
When the ISU 2x64 is used on an existing ISDN line that is not  
multipoint, with one SPID or no SPID numbers, additional con-  
siderations should be addressed. If DTE specific operation is  
desired, the ISDN line must be converted to multipoint operation  
(2 SPIDS). If not, the following applies:  
1. If a single SPID is assigned, it must be entered under SPID  
DTE#2.  
2. When no calls are active, the first incoming call is always di-  
rected to DTE#2.  
3. DTE#1only accepts incoming calls when a call is active on  
DTE#2.  
4. Outgoing calls can be placed without restrictions from either  
port.  
For applications involving only one SPID being used on a multi-  
point line, the SPID assigned must be entered under SPID  
DTE#2. For applications involving the S/T version (part number  
1200.051L5 and 1200.051L6), no SPID(s) are used when the Euro  
ISDN or VN4 switch type is selected. The call will be routed to  
the appropriate port based on the directory number entered  
under the local directory number (LDN) prompt . See the section  
Setting the Terminal ID on page 32 for more detail on entering  
SPID numbers.  
RECOMMENDED OPERATING PROTOCOLS  
The ISU 2x64 supports a wide range of operating modes. Many  
combinations of circuit type, protocol, and data rate may be  
selected. However, only the combinations shown in Table 1-B are  
recommended. As noted in Table 1-B, all asynchronous rates sup-  
port flow control. Flow control is required when operating at  
115200 bps using V.120, PPP, MLPPP, SAP, or BONDING proto-  
cols.  
Table 1-B shows that a given data rate may be achieved by more  
than one protocol/rate adaptation selection. The table is orga-  
nized so that selections with lower throughput delay are nearer  
the top of the table for any given circuit type. Therefore, users  
should choose a protocol and rate nearer the top of the list for any  
given circuit type.  
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Chapter 1. Understanding ISDN and the ISU 2x64  
Table 1-B  
Recommended Operating Modes  
Sync/  
Async  
Call Type  
Protocol  
Rates Supported (bps)  
DIAL-64K  
BONDING  
Clear Chan  
PPP  
Sync  
56000  
48000  
2400  
64000  
56000  
4800  
Sync  
Sync  
64000  
9600  
9600  
19200  
19200  
48000  
19200  
38400  
38400  
56000  
64000  
64000  
V.110  
Sync  
2400  
4800  
V.120  
Sync  
9600  
19200  
4800  
38400  
9600  
Tlink  
Sync  
2400  
56000  
SAP  
Sync  
38400  
1200  
PPP async-sync  
BONDING  
V.110  
Async  
Async  
Async  
Async  
Async  
Async  
Sync  
2400  
4800  
2400  
2400  
2400  
4800  
9600  
4800  
4800  
4800  
9600  
19200  
9600  
19200  
38400  
19200  
19200  
19200  
38400  
57600  
38400v  
38400  
57600  
57600  
115200f  
115200f  
2400  
1200  
V.120  
1200  
9600  
Tlink  
1200  
9600  
SAP  
38400  
56000  
48000  
2400  
57600 115200f  
DIAL-56K  
BONDING  
Clear Chan  
PPP  
Sync  
56000  
Sync  
4800  
4800  
19200  
4800  
2400  
4800  
9600  
9600  
38400  
9600  
4800  
9600  
19200  
19200  
48000  
19200  
9600  
38400  
56000  
V.110  
Sync  
2400  
V.120  
Sync  
9600  
TLINK  
Sync  
2400  
56000  
19200  
38400  
PPP async-sync  
BONDING  
DSU 57.6  
V.110  
Async  
Async  
Async  
Async  
Async  
Async  
Sync  
1200  
38400  
57600  
57600  
57600  
115200f  
115200f  
2400  
19200  
57600  
1200  
2400  
2400  
2400  
4800  
4800  
4800  
9600  
9600  
9600  
19200  
19200  
19200  
V.120  
1200  
38400  
Tlink  
1200  
DIAL-64K*2  
DIAL-56K*2  
LEASED 64K  
BONDING  
MPPP  
128000  
128000  
115200  
115200  
112000  
112000  
115200  
115200  
48000  
2400  
Sync  
MPPP  
Async  
Async  
Sync  
BONDING  
BONDING  
MPPP  
Sync  
MPPP  
Async  
Async  
Sync  
BONDING  
Clear Chan  
SAP  
56000  
4800  
64000  
9600  
Sync  
19200  
9600  
38400  
19200  
DSU 57.6  
SAP  
Async  
Async  
Sync  
57600  
1200  
2400  
4800  
38400  
57600f  
115200f  
LEASED 128K Clear Chan  
SAP  
128000  
Async  
57600f 115200f  
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Chapter 1.Understanding ISDN and the ISU 2x64  
1. All asynchronous rates support flow control.  
2. All dial-up modes support front panel, DTR, RS-366, AT  
command, and V.25 dialing methods.  
3. Rates marked with f require flow control.  
4. Given a choice between two protocols, pick the protocol closer  
to the top of the list.  
5. Rate marked with v is available on Port 2 only.  
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Chapter 2  
ISDN Service  
ISDN ORDERING CODES  
ISDN is a complex service with many network options. Obtain-  
ing service from the local telephone company and long distance  
providers can be complicated.  
In North America, the development of ISDN ordering codes  
(IOCs) simplifies the process of ordering ISDN service. The ISDN  
Solutions Group, a consortium of ISDN equipment vendors, ser-  
vice providers, and Bellcore, established these codes to represent  
predetermined line configurations for ISDN Basic Rate service for  
specific applications.  
ADTRAN and Bellcore have registered and tested eight generic  
IOCs. These IOCs are supported by all major local exchange car-  
riers as well as several independent carriers. After reviewing the  
following list, order ISDN lines from the local service provider.  
Request the appropriate IOC for your application. If the local ser-  
vice provider does not support IOCs, see Ordering ISDN Without  
IOCs on page 125.  
Capability S (previously Generic Data M) ordering code is rec-  
ommended for 2x64 applications. It is the most feature-rich and  
supports most voice and data applications. The voice capability  
is not necessary for ISU operation in 2x64 in data-only applica-  
tion, however it is useful in troubleshooting a mis-configured  
ISDN line. In some areas, ISDN tariffs may warrant the use of  
ordering codes with less features. For example, in a particular  
region, there may be additional monthly expense associated with  
having voice service on each B channel. If you have a data-only  
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Chapter 2.ISDN Service  
application, then Capability R (previously Generic Data I) may  
be more cost-effective.  
ADTRAN has registered the following ISDN ordering codes to  
support a variety of tariffs and applications:  
Capability S (previously Generic Data M)  
2B service  
Both B channels alternating voice and data  
Two directory numbers  
Applications  
Host data center, internet access, bulletin board, and modem  
pooling applications  
Modem capability  
Generic data transfer, including remote access and LAN/  
WAN connectivity and telecommuting  
Capability R (previously Generic Data I)  
2B service  
Data only  
Two directory numbers  
Applications  
Host data center, internet access, bulletin board, and modem  
pooling applications  
Data only applications, no modem capability  
Data transfer applications, including remote access and  
LAN/WAN connectivity, telecommuting  
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Chapter 2. ISDN Service  
B1 (previously Generic Data B)  
1B service  
Data only  
One directory number  
Capability C (previously Generic Data C)  
1B service  
Alternating voice and data  
One directory number  
I2 (previously Generic Data I-1DN)  
2B service  
Data only  
One directory number  
I2 is not available for services provided by a Northern Telecom switch. Two  
directory numbers are required for 2B operation. In this case, use Capabil-  
ity R.  
J3 (previously Generic Data J-1DN)  
2B service  
1B alternating voice/data, 1B data only  
One directory number  
J3 is not available for services provided by a Northern Telecom switch. Two  
directory numbers are required for 2B operation. In this case, use J2.  
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Chapter 2.ISDN Service  
J2 (previously Generic Data J)  
2B service  
1B alternating voice/data, 1B data only  
Two directory numbers  
M5 (previously Generic Data M-1DN)  
2B Service  
1B alternating voice/data, 1B data only  
One directory number  
M5 is not available for services provided by Northern Telecom or AT&T  
switches.  
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Chapter 3  
Installation  
After unpacking the unit, immediately inspect it for possible  
shipping damage. If damage is discovered, file a claim immedi-  
ately with the shipping carrier, then contact ADTRAN Technical  
Support.  
Each ISU 2x64 is provided with an eight-foot power cord termi-  
nated by a three-prong plug which connects to a grounded power  
receptacle.  
ADTRAN ISU 2x64 part numbers 1200051L1, 1200051L2, and  
1200051L5 require a grounded 115 VAC, 60 Hz receptacle for  
power.  
ADTRAN ISU 2x64 part numbers 1200051L3, 1200051L4 and  
1200051L6 require a 230 VAC, 50 Hz receptacle for power.  
NETWORK CONNECTION  
An eight-pin RJ-45 modular jack on the rear panel of the ISU 2x64  
allows connection to ISDN Basic Rate service provided by the  
telephone company or to a leased type of service. This leased ser-  
vice can be dedicated 2B1Q data service or a nailed-up circuit that  
provides a dedicated connection between end points such as a  
limited distance modem or LAD circuit.  
If using ISU 2x64, part number 1200051L1 or 1200051L3, connect  
the telephone company provided ISDN Basic Rate U-Interface to  
the RJ-45 connector marked ISDN IFC. An external NT1 is not  
needed in this configuration.  
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Chapter 3.Installation  
If using ISU 2x64, part number 1200051L2, 1200051L4, 1200051L5,  
or 1200051L6, connect an ISDN Basic Rate S/T interface to the RJ-  
45 connector marked ISDN IFC. The S/T interface can be pro-  
vided from an S/T line card of an ISDN switch or PBX, or from an  
NT1 network termination unit.  
If using a leased service, connect the network interface to the RJ-  
45 connector marked ISDN IFC.  
See Connector Pinouts on page 119 for network connection pin  
assignments.  
DTE DATA CONNECTION  
Data terminal equipment (DTE) is connected to the ISU 2x64 by  
using the RS-530/EIA-232 interfaces or by using the external RS-  
530-to-V.35 adapters (part number 1200072L1). A maximum  
cable length of 50 feet is recommended for the RS-530/EIA-232  
interfaces. If using the RS-530-to-V.35 adapter and connected to a  
full specification V.35 interface, the maximum recommended  
cable length is 15 feet. The pin assignments for the DTE inter-  
faces are shown in Connector Pinouts on page 119. Be sure to con-  
figure the menu option for the connector type used in your  
application. See DTE Options for Asynchronous and Synchronous  
Operation on page 50.  
The RS-530/EIA-232 interface and the RS-530-to-V.35 interface  
supports data rates up to 128 kbps. The DTE rate is configured  
from the front panel of the ISU 2x64 or by using AT commands.  
See Configuration to configure the ISU 2x64 with the appropriate  
data rates for your application.  
To prevent possible radio frequency interference emissions, a shielded  
V.35 cable is required.  
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Chapter 3. Installation  
MAINTENANCE INTERFACE  
The Maintenance interface is available at 9600 bps, 8 data bits, no  
parity, no flow control, asynchronous format through the Mainte-  
nance port. See Connector Pinouts on page 119 for the pinout of  
the Maintenance port. A VT 100 terminal or null modem can be  
connected to the Maintenance port using an EIA-232 cable. This  
interface can be used to set internal S-registers, dial ISDN connec-  
tions, and disconnect calls. This port also allows ADTRAN Tech-  
nical Support personnel to retrieve vital information from the  
unit if a problem is encountered during initial configuration of  
the ISU 2x64. Most problems can be solved without resorting to  
this port for assistance.  
The ISU 2x64 Maintenance Help Screen can be activated by typ-  
ing !? at either the DTE#1 or DTE#2 prompt. The screen is shown  
in Figure 3-1.  
Figure 3-1  
VT 100 Maintenance Help Screen  
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Chapter 3.Installation  
DIAL INTERFACE CONNECTION  
If out-of-band RS-366 dialing is required for applications such as  
videoconferencing or FAX machines, the dialing interfaces of the  
host DTE should be connected to the dial ports marked RS-366.  
Pin assignments for the RS-366 connector are listed in the appen-  
dix, Connector Pinouts.  
16  
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Chapter 4  
Operation  
MENU NAVIGATION  
Moving through the various menu selections on the ISU 2x64 is a  
simple task. Four function keys on the left-hand side of the key-  
pad allow the user to enter, exit, and scroll through the various  
menu branches. The four function keys are defined below.  
To aid the reader, function keys are represented in bold, initial caps text.  
Selectable menu items and messages displayed on the LCD are represent-  
ed in bold type as they appear on the LCD.  
Enter  
Enters the selected item.  
Scrolls up a menu tree.  
Scrolls down a menu tree.  
Up arrow  
Down arrow  
Cancel  
Exits (back one level) from the current  
branch of the menu.  
Press either the Up or Down arrow to scroll through the menu  
tree. To choose an item, press the corresponding number on the  
keypad. The item blinks to show it is selected. Press Enter to  
select the item. Press Cancel to exit back through the menu tree.  
It is important to note that some features in the ISU 2x64 do not  
immediately take effect upon selection. This prevents uninten-  
tional reconfiguration of the ISU 2x64 during an active call. S-  
BUS termination takes effect only when the unit is powered up.  
To ensure the ISU is actually performing as configured, cycle the  
power off then back on again, especially after changing ISDN  
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Chapter 4.Operation  
switch type, SPIDs, LDNs, or Leased/dial line. Also, items such  
as bit rate, protocol, and call type take effect only at the begin-  
ning of a new call.  
Front Panel DTE Indicators  
The front panel DTE indicators (see Figure 4-1) reflect the status  
of each DTE port on the ISU 2x64. The indicators show the cur-  
rent state of the port being displayed from the Current Status  
menu. To change the DTE indicators between the two DTE ports,  
use the Up and Down arrow keys to bounce between the two  
DTE ports Current Status menus. Once this menu is exited, the  
DTE indicators reflect the status of the DTE# that was last shown.  
See Table 1-A on page 3 for a listing of the front panel DTE indica-  
tors.  
ISU 2X64  
1
4
2
5
3
6
ENTER  
7
8
0
9
RS CS TD RD CD TR SR  
CANCEL  
#
*
Figure 4-1  
Current Status Menu  
The ISU 2x64 automatically updates the Current Status menu to  
the DTE# that is receiving an incoming call For example, if the  
Current Status menu shows the state of DTE#1, and a call is  
incoming on DTE#2, the ISU 2x64 automatically changes the dis-  
play to show the Current Status menu for DTE#2. Change this by  
using the Up and Down arrow keys to select either DTE.  
18  
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Chapter 4. Operation  
VT 100 Menu Support  
When connected to an asynchronous VT 100 terminal or VT 100  
terminal emulator, use the built-in ISU 2x64 menu system for  
configuration of both DTE ports. The VT 100 screens can be acti-  
vated by typing AT!V while connected to either DTE port (in AT  
command mode), or by typing !V at the prompt while using the  
maintenance port. The maintenance port is an asynchronous port  
always set to 9600 bps, 8 data bits, one stop bit, no parity, and no  
flow control. By using the VT 100 screens on the maintenance  
port, both DTE ports can be configured from one terminal. The  
command Ctrl+P switches between DTE #1 and DTE #2.  
GETTING STARTED  
At power up, the ISU 2x64 runs a self test as indicated on the dis-  
play. After approximately 10 seconds, Passed is momentarily dis-  
played (if the ISU 2x64 does not pass the self test, see If Self Test  
Fails on page 77). This is followed by the Current Status mode of  
DTE#1. The Current Status mode DTE#2is shown by pressing  
either arrow key. This is the recommended resting place for the  
unit since it shows the current operational status of the unit. For  
instance, if the ISU 2x64 is not connected to the network, the Cur-  
rent Status menu displays ISU 2x64 DTE# (1 or 2) Link down. If  
the unit is connected to the network and functioning properly, it  
displays ISU 2x64 DTE# (1 or 2) Ready. A list of Current Status  
messages is provided in Current Status Messages on page 95.  
Pressing the Cancel key repeatedly returns the unit to the Cur-  
rent Status menu. While at the Current Status menu, pressing  
any key, except the Cancel and # keys, repeatedly changes the  
display to the top of the menu tree. Pressing the # key brings up  
the Dial submenu. While in a menu tree, pressing the # key  
causes the unit to return to the Current Status menu.  
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Chapter 4.Operation  
The menu tree allows for set up and operation of the ISU 2x64  
from the front panel. The main branches of the menu tree follow:  
1. STATUS  
2. TEST  
3. CONFIG (ConÞguration)  
4. DIAL  
Status Buffer  
Selecting 1=STATUS from the top of the menu tree displays the  
contents of the status buffer. The Up and Down arrow keys allow  
the viewing of the last fifty status messages generated during the  
operation of the unit. (An explanation of Status Buffer Messages  
can be found in Status Buffer Messages on page 99). Pressing the  
Cancel key returns you to the top of the menu. Pressing the 0 key  
will clear the entries from the status buffer.  
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Chapter 4. Operation  
Status Screen  
To determine the current status of the unit, press Ctrl+V to access  
the Status Screen (see Figure 4-2). The Status Screen displays unit  
information such as the loop status, software revision, the result  
of the initial self test, and the status buffer messages. (An expla-  
nation of status buffer messages can be found in Status Buffer  
Messages on page 99.)  
Figure 4-2  
VT 100 Status Screen  
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Chapter 4.Operation  
Configuration Screen  
Once the unit is selected using the terminal interface, the display  
shows the Configuration Menu (see Figure 4-3). This screen  
shows the current configuration, line, and call status for the  
selected unit. See Configuration on page 27 for more information  
about configuring the ISU 2x64.  
Figure 4-3  
VT 100 Configuration Screen  
To quickly and easily configure the ISU 2x64 for most applica-  
tions, see Quick Setup on page 65.  
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Chapter 5  
Testing  
TEST OPTIONS  
Selecting 2=TEST from the top of the menu tree (Figure 5-2) or  
Ctrl + T from any VT 100 screen displays available local testing  
options; this screen is shown in Figure 5-1.  
Figure 5-1  
VT 100 Test Menu Screen  
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Chapter 5.Testing  
1=Loopback DTE  
2=Loopback Netw.  
3=Loopback Proto  
4=Loopback Remot  
5=Test Remote  
1=STATUS  
2=TEST  
3=CONFIG  
4=DIAL  
1=No Rem Lpbks  
2=DDS Accepted  
3=V.54 Accepted  
4=DDS+V54 Accept  
6=Lpbk Disable  
7=NEBE/FEBE  
8=Software Ver  
9=Lpbk Both DTEs  
10=Test 2047 Both  
Figure 5-2  
Test Menu Tree  
Loopback DTE  
This test causes the DTE port to loop back toward user equip-  
ment. This allows a bit error rate test (BERT) to be performed  
from the local end-user equipment to the ISU 2x64 to verify  
proper cable connection, etc. Either a BERT tester or DTE data  
packet test must be used for this test.  
Loopback Network  
This test forces the ISU 2x64 to loop back both the B1 and B2  
channels toward the network. This can be used to allow a far-end  
user to perform a BERT all the way through the network.  
Loopback Protocol  
This test causes data to be looped back toward the network after  
passing through a selected protocol such as T-Link or BONDING.  
See Figure 5-3 for loopback points.  
RATE  
ADAPTION  
NET  
DTE  
Protocol  
DTE  
Network  
NETWORK  
DTE  
IFCE  
IFCE  
Figure 5-3  
Loopback Points  
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Chapter 5. Testing  
Loopback Remote  
This test causes the ISU 2x64 to issue a V.54 inband loopback  
command to a far-end unit. External test equipment must be  
used to generate/check test patterns. To use this feature, both  
units must be configured for Clear Channel operation and the far-  
end unit must be able to respond to V.54 loopback commands.  
See Setting Protocol Options on page 55 to configure the unit for  
Clear Channel operation. Press Cancel to end the test.  
Test Remote  
This test causes the ISU 2x64 to issue a V.54 inband loopback com-  
mand to a far-end unit and BERT test the link using a built-in pattern  
generator/checker. This allows a circuit to be tested without any  
extra test equipment. To use this feature, both units must be config-  
ured for Clear Channel operation and the far-end unit must be able  
to respond to V.54 loopback commands. See the section Setting Pro-  
tocol Options to configure the unit for Clear Channel operation. The  
built-in 2047 pattern generator/checker displays the number of  
bytes transmitted on the top line and the number of errored bytes  
received on the lower line of the front panel display. Pressing 0 will  
clear the counts. Pressing the Cancel key ends the test. Pressing the  
down arrow will loop down the remote unit, allowing a test to a  
loopback plug. Pressing 2 will insert errors.  
Loopback Disable  
The following options are available in Loopback Disable.  
No Rem Lpbks: The ISU 2x64 ignores all V.54 and DDS loopback  
commands.  
DDS Accepted: The ISU 2x64 responds to DDS latching loopback  
commands. This option only takes effect if the unit is in Leased  
Line mode.  
V.54 Accepted: The ISU responds to V.54 loopback commands.  
DDS+V54 Accept: The ISU 2x64 responds to both DDS latching  
loopback commands (Leased Line mode only) and V.54 loopback  
commands.  
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Chapter 5.Testing  
The ISU 2x64 must be optioned for Clear Channel operation for DDS  
and V.54 loopbacks to take effect.  
NEBE/FEBE  
This test reports the quality of the network connection between  
the T-1 and the switch by viewing the number of near-end block  
errors (NEBE) and far-end block errors (FEBE) occurring on the  
ISDN interface. An incrementing count in NEBE means the prob-  
lem is in the direction of the NT-1. An incrementing count in  
FEBE means the problem is in the direction of the switch.  
Software Version  
This test determines the software version in use on the ISU 2x64.  
Loopback Both DTEs  
Choosing this option loops back both DTE ports simultaneously.  
Test 2047 Both  
Choosing this option is similar to Test Remote, except both ports  
are tested simultaneously.  
Press Cancel to exit any of these options.  
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Chapter 6  
Configuration  
DIAL LINE OPERATION  
This section explains how to configure the ISU 2x64 when using  
ISDN Basic Rate switched service. Figure 6-3 illustrates the entire  
menu tree.  
The following are step-by-step procedures for configuring the  
unit for dial line operation, switch protocol, call type, terminal ID,  
dial options, auto answer, answer tone, connect timeout, call  
screening, and SBus termination.  
To dial calls over the ISDN, the unit must be configured for Dial  
Line. The menu path to select Dial Line operation is shown in Fig-  
ure 6-1.  
1=Dial Line  
1=Netw. options  
2=DTE options  
3=Protocol  
2=Leased Line  
3=CONFIG  
4=Quick setup  
5=Security  
6=Remote Config  
Figure 6-1  
Dial Line Menu Tree  
When using a VT 100 terminal, press Ctrl + C to access the Con-  
figuration screen, then set the Line type option to Dial Line. The  
screen appears as shown in Figure 6-2.  
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Chapter 6. Configuration  
Figure 6-2  
VT 100 Configuration Menu Screen  
Setting the Switch Protocol  
Find out what kind of ISDN switch the local CO is using by asking  
the telephone administrator or telephone company representa-  
tive. Configure the ISU 2x64 for either Northern Telecom DMS-  
100, AT&T 5ESS¨, or a switch conforming to the National ISDN-1  
standard (usually an AT&T 5ESS, NT DMS-100¨, or Siemens  
EWSD). For switches outside of North America, use the Euro IS-  
DN, VN4, TDX10, TDX1B, KDD, NTT, or NEC switch types.  
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Chapter 6. Configuration  
1=AT&T 5ESS  
2= DMS-100  
3=National ISDN1  
4=NEC Switch  
5=TDX10*  
6=TDX1B*  
7=EuroISDN*  
8=VN4*  
9=KDD*  
10=NTT*  
1=Switch Protocl  
*Only available on part number  
1200051L5 and 1200051L6.  
STATUS  
‘Buffer Display’  
<Use Up and Down keys to Scroll>  
KEY  
dte#1  
dte#2  
This symbol means the menu items that follow can  
be configured for DTE#1 or DTE#2 when entering these  
portions of the menu tree. Use the up and down ARROW  
keys to choose DTE#1 or DTE#2.  
Press ENTER to select.  
Use the CANCEL key to back up.  
dte#1  
dte#2  
2=Call type  
1=Speech  
2=Audio  
3=Data 56Kbps  
4=Data 64Kbps  
1=1 sec or EON  
dte#1  
dte#2  
TEST  
1=Loopback DTE  
2=Loopback Netw.  
3=Loopback Proto  
4=Loopback Remot  
5=Test Remote  
6=Lpbk Disable  
7=NEBE/FEBE  
8=Software Ver  
9=Lpbk Both DTE  
2=2 sec or EON  
3=5 sec (default)  
4=10 sec or EON  
5=20 sec or EON  
6=Wait for EON  
3=Terminal ID  
4=Busy Out  
Set SPID  
dte#1 <SPID>  
dte#2 <SPID>  
Set LDN dte#1 <LDN>  
dte#2 <LDN>  
NOTE: Bold type represents default.  
1=No Rem Lpbks  
2=DDS Accepted  
3=V54 Accepted  
4=DDS + V54 Accept  
1=Enabled  
2=Disabled  
1=V.25 HDLC  
1=Front Panel  
2=RS-366  
3=AT commands  
4=V.25  
2=V.25 ASYNC  
3=V.25 BISYNC  
4=V.25 HDLC FLAG  
dte#1  
dte#2  
0=Test 2047 Both  
5=Dial options  
6=Auto answer  
5=Disabled  
dte#1  
dte#2  
1=Disabled  
2=Enabled  
3=Dump all calls  
dte#1  
dte#2  
7=Answer tone  
1=No answer tone  
2=Incoming tone  
3=Outgoing tone  
4=Always tone  
1=Bit Rate  
1=300  
6=19200  
7=38400  
8=57600  
9=115200  
2=1200  
3=2400  
4=4800  
5=9600  
8=Connect Timout 1=15 sec  
2=30 sec (def)  
3=1 minute  
4=2 minute  
5=4 minute  
1=Netw. options  
1=Dial Line  
2=Connector Type 1=RS-530  
2=V.35  
2=Leased Line  
3=RS-232  
9=Call Screening 1=Answer any  
1=Clock mode  
1=Slave  
2=Master  
2=Ansr if SNO…9  
3=RTS Options  
4=CTS Options  
5=CD Options  
1=1 ms delay  
2=18 ms delay  
2=Channel rate  
1=64k  
2=128k  
CONFIG  
10=SBUS Terminati 1=100 ohm On  
1=Forced CTS  
2=Follows RTS  
2=100 ohm Off  
3=SBus Terminati  
1=100 ohm On  
2=100 ohm Off  
1= CD Forced on  
2=Normal  
1=Asynchronous  
3=Off with LOCD  
4=Off Link Down  
2=DTE options  
3=Protocol  
dte#1  
dte#2  
2=Synchronous  
1=Bit Rate  
1=2400  
2=4800  
3=9600  
4=19200 9=112000  
5=38400 0=128000  
6=48000  
7=56000  
8=64000  
6=DTR Options  
1=Ignore DTR  
2=Cmd when Off  
3=Idle when Off  
4=Off>On dial #0  
5=Dial #0 if On  
6=Answer if On  
1=TXINIT  
2=TXFA  
3=TXADD01  
4=TXDEQ  
5=TANULL  
6=TCID  
dte#1  
dte#2  
1=Clear Channel  
2=BONDING mode 1  
3=V.120  
4=V.110  
5=DSU 57.6 ASYNC  
6=T-LINK  
7=SAP  
8=FALLBACK  
9=PPP asyn-sync  
2=Connector Type 1=RS-530  
2=V.35  
3=RS-232  
7=DSR Options  
8=Flow Control  
9=Data Format  
1=DSR forced on  
2=OFF Idle+Test  
3=OFF Link Down  
7=Async Rev  
3=RTS Options  
4=CTS Options  
5=CD Options  
1=1 ms delay  
2=18 ms delay  
1=PPP  
2=Multilink PPP  
3=PPP w/Comp  
1=Hardware Flow  
2=Software Flow  
3=No Flow Ctrl  
1=Forced CTS  
2=Follows RTS  
dte#1  
dte#2  
4=Quick setup  
1=Dial 56K sync  
2=Dial 64Ksync  
3=Dial 112K sync  
4=Dial 128K sync  
5=Dial 57.6 asyn  
6=Dial 115.2 asy  
7=Fallback 57.6k  
8=Leased 64K  
1=CD Forced on  
2=Normal  
3=Off with LOCD  
4=Off Link Down  
1=Data Bits  
1=8 Data bits  
2=7 Data bits  
2=Parity Bits  
1=None  
2=Odd  
3=Even  
6=DTR Options  
1=Ignore DTR  
2=Cmd when Off  
3=Idle when Off  
4=Off>On dial #0  
5=Dial #0 if On  
6=Answer if On  
9=Ldm 64K Master  
3=Stop Bits  
1=1 Stop bit  
2=1.5 Stop bits  
3=2 Stop bits  
5=Security  
Password <  
>
1=Set Password  
2=Lock Keypad  
1=Number <  
2=Password <  
>
Password Required  
dte#1  
dte#2  
>
6=Remote Config  
1=Cfg. Rmt. Unit  
2=Set Password  
3=Lpbk remote 1B Number <  
4=Lpbk remote 2B Number <  
7=DSR Options  
1=DSR forced on  
2=OFF Idle+Test  
3=OFF Link Down  
Password <  
>
>
>
dte#1  
dte#2  
1=Hang up line  
2=Dial number  
3=Redial last #  
4=Answer Call  
5=Dial Stored #  
6=Store/Review #  
DIAL  
8=Transmit Clock  
1=Normal  
2=External  
Figure 6-3  
LCD Configuration Menu Tree  
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Chapter 6. Cofiguration  
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Chapter 6. Configuration  
Setting the Call Type  
Call type is configured for both DTE#1and DTE#2. When using  
the front panel, select the appropriate DTE with either arrow key  
and press Enter. When using a VT 100 terminal, select the option  
number corresponding to the appropriate DTE and press Return.  
The Call type can be configured four different ways, depending  
on the type of service used: Speech , Audio, Data 56 kbps, or  
Data 64 kbps.  
Speech  
Speech directs the call control software to request a Mu-law (or  
A-law) speech circuit as the bearer capability for outgoing calls.  
The Speech option is used with an ISDN line configured for voice  
service. In some areas voice service is less expensive than data  
service. A Speech call type does not guarantee an end-to-end  
digital connection with some local and long distance carriers.  
Audio  
Audio directs the call control software to request a 3.1 kHz audio  
circuit as the bearer capability for outgoing calls. The Audio  
option is used with an ISDN line configured for voice service. In  
some areas audio service is less expensive than data service.  
Selecting Audio guarantees a digital end-to-end ISDN connec-  
tion.  
Data 56kbps  
Data 64kbps  
Data 56kbps directs the call control software to request a 64 kbps  
data circuit that is rate-adapted to 56 kbps. Data 56 kbps is  
intended for use in circumstances where interoperability with  
Switched-56 service is desired.  
The default Call type for ISDN service is Data 64 kbps. This  
directs the call control software to request an unrestricted 64 kbps  
circuit.  
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Chapter 6. Configuration  
Smart Dial Strings  
In some cases during a dial session it may be desired to change  
the call type temporarily. At the end of a dialed phone number, a  
#1,2,3, or 4 can be used to change the call type. A #1 changes it to  
speech, #2 to Audio, #3 to 56K, and #4 to 64K.  
Setting the Terminal ID  
Terminal identification is assigned by the local telephone com-  
pany and consists of a SPID and LDN number.  
Setting the SPID  
In North America, the SPID is a sequence of digits used to identify  
ISDN terminal equipment to the ISDN switch. The SPID is assigned  
by the local phone company when the ISDN line is installed and usu-  
ally looks similar to the phone number. Obtain the SPIDs from the  
telephone administrator or local telephone representative. The num-  
ber of SPIDs required (0, 1, or 2) depends on how the ISDN line is con-  
figured. For instance, a point-to-point line has no SPID. Multipoint  
lines may have one or two SPIDs. If the line has only one SPID, then  
it must be entered in SPID DTE#2. It is recommended to use two  
SPIDs with the ISU 2x64, with a SPID assigned to each DTE port.  
When entering a SPID using the front panel, use the Up and Down  
arrow keys to select between SPID DTE#1and SPID DTE#2. Press  
Enter to select the DTE. Use the keypad to enter the SPID. While  
keying/editing a SPID, the Down arrow allows backspacing  
through the number string to correct mistakes. The Up arrow scrolls  
back to the last digit entered. After entering each SPID, press Enter.  
To abort changes at any time, press Cancel. The changes are dis-  
carded, leaving the original number unchanged. If entering the SPID  
using the VT 100 terminal, select the option number corresponding  
to the appropriate DTE and press Return. Enter the number using  
the keyboard and press Return to store the number.  
Disconnect the network interface from the unit before initially entering and/  
or altering the SPIDs or LDNs.  
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Chapter 6. Configuration  
Setting the LDN  
This option allows the entry of 0, 1, or 2 LDNs. The LDN is used  
when receiving BONDING calls or receiving separate calls for  
each DTE connection. The LDN is the seven-digit local phone  
number assigned to the line.  
When entering an LDN using the front panel, use the Up and  
Down arrow keys to select between LDN DTE#1and LDN  
DTE#2. Press Enter to select the DTE. Use the keypad to enter  
the LDN. The Up and Down arrow keys edit the number if nec-  
essary. To store the number press Enter. To cancel a number, use  
the Down arrow to backspace through the number, then press  
Enter. After entering each LDN, press Enter. To abort changes at  
any time, press Cancel. The changes are discarded, leaving the  
original number unchanged.  
When using a VT 100 terminal, select the option number corre-  
sponding to the appropriate DTE and press Return.  
SPID and LDN numbers are entered in pairs and should not be  
crossed between the two DTE ports. Each SPID has a unique  
LDN. Enter a SPID-LDN pair for DTE#1and a separate SPID-  
LDN for DTE#2. Ensure that the SPID for DTE#1matches the  
LDN for DTE#1, and the SPID for DTE#2matches the LDN for  
DTE#2.  
Disconnect the network interface from the unit before initially entering and/  
or altering the SPIDs or LDNs.  
Setting the Busy Out Port  
The Busy Out Port is recommended for use in Hunt Group appli-  
cations only. This option allows the ISU 2x64 to command the  
switch to no longer route calls to the 2x64. The Busy Out Port  
requires the ISDN line to be configured by the telephone com-  
pany to support the Make Busy feature and a feature button  
number to be assigned for activating and deactivating busy sta-  
tus.  
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Chapter 6. Configuration  
Feature buttons are buttons that are normally available on ISDN  
telephone sets. The ISU 2x64 simulates pressing a feature button  
when the Busy Out Port option is changed. When the Busy Out  
Port option is changed, the ISU 2x64 sends a Feature Activation  
message to the switch using the feature button number stored in  
S-register 23. If S-register 23 is not programmed with the correct  
button number for the Make Busy feature, the switch will not  
change the busy status of the ISU 2x64. The telephone company  
will need to tell you which feature button number was assigned  
to the Make Busy feature.  
Enabled  
Disabled  
To turn on the Make Busy feature, configure Busy Out Port for  
Enabled.  
To turn off the Make Busy feature, configure Busy Out Port for  
Disabled.  
Multi-point lines must be used for per-port operation of the Busy Out Port  
feature.  
Setting the Dial Options  
The ISU 2x64 can be configured to dial using the Front Panel, RS-  
366 port, AT Commands, or V.25 bis Commands.  
Front Panel  
RS-366  
To establish and disconnect calls from the front panel keypad  
configure Dial options for Front Panel. See Front Panel Dialing  
Options on page 63 for more detail.  
Configuring the ISU 2x64 for RS-366 enables out-of-band dialing  
over the RS-366 port. To establish and disconnect calls using the  
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Chapter 6. Configuration  
RS-366 parallel dialing port, configure the unit for RS-366 dialing.  
(See Figure 6-4.) This enables the RS-366 port on the rear of the  
unit. Whenever this dialing mode is enabled, data terminal ready  
(DTR) must be active before a call is placed. The call may be dis-  
connected by dropping DTR, or from the front panel by selecting  
the # (pound) key to go directly to the Dial menu and selecting  
1=Hang up line, then Enter.  
DTE RS-366 dialers can end their string of dialed numbers in two  
different ways. The end of number (EON) alerts the ISU 2x64  
that the entire number has been sent. Another method is to sim-  
ply stop sending numbers and allow the ISU 2x64 to time out,  
then dial the number. The ISU 2x64 supports both methods of  
dialed number terminations. The following options allow the  
dialed number termination to be fine-tuned:  
1=Switch protocl  
1=1 sec or EON  
2=Call type  
2=2 sec or EON  
1=Front Panel  
1=Dial Line  
3=Terminal ID  
3=5 sec(default)  
4=10 sec or EON  
5=20 sec or EON  
6=Wait for EON  
2=RS-366  
1=Netw. options  
2=DTE options  
3=Protocol  
2=Leased Line  
4=Busy Out  
3=AT commands  
4=V.25  
5=Dial options  
6=Auto answer  
7=Answer tone  
8=Connect Timout  
9=Call Screening  
10=SBus Terminati  
3=CONFIG  
5=Disabled  
4=Quick setup  
5=Security  
6=Remote Config  
Figure 6-4  
Dial Options, RS-366 Menu Tree  
1 sec or EON:  
The ISU 2x64 assumes the dial string is fully entered if more than  
one second elapses since the last digit was keyed, or the unit  
receives the EON command.  
2 sec or EON:  
The ISU 2x64 assumes the dial string is fully entered if more than  
two seconds elapse since the last digit was keyed, or the unit  
receives the EON command.  
5 sec or EON (def):  
10 sec or EON:  
The ISU 2x64 assumes the dial string is fully entered if more than  
five seconds elapse since the last digit was keyed, or the unit  
receives the EON command. This is the factory default setting.  
The ISU 2x64 assumes the dial string is fully entered if more than  
10 seconds elapse since the last digit was keyed, or the unit  
receives the EON command.  
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Chapter 6. Configuration  
20 sec or EON:  
The ISU 2x64 assumes the dial string is fully entered if more than  
20 seconds elapse since the last digit was keyed, or the unit  
receives the EON command.  
Wait for EON:  
The ISU 2x64 assumes the dial string is fully entered only if the  
unit receives the EON command.  
AT Commands  
Configuring the ISU 2x64 for AT commands enables inband dial-  
ing over a DTE interface using asynchronous AT commands. AT  
commands can be used to set up the ISU 2x64 as well as establish  
and end a call. Calls can be disconnected from the front panel (as  
described previously) or from the far-end unit. Do not set the unit  
up for AT command in synchronous applications.  
When AT commands are selected, the DTE port becomes dual  
purpose. First, while a call is not established, the port accepts AT  
commands. During this time, the CD signal is inactive. Second,  
when a call is established, the port is used for data. This data  
mode is indicated by the CD signal active. See the appendix AT  
Commands for a listing of the supported AT commands and their  
functions. In addition to the front panel, the ISU 2x64 can be con-  
figured and controlled with inband AT commands from an asyn-  
chronous DTE port just as modems are.  
To exit data mode and enter command mode, the asynchronous  
DTE device must transmit a proper escape sequence to the ISU  
2x64. A specified time delay must occur between the last data  
character and the first escape sequence character. This is the  
guard time delay, and it can be changed by writing a value to the  
S12 register. The default value for the guard time is one second.  
For a valid escape sequence to occur, the DTE must transmit the  
escape code character three times in succession with delay  
between each character being less than the guard time. The  
default escape sequence is +++.  
Once command mode is entered, AT commands can be transmit-  
ted to the ISU 2x64 to configure most of the options, dial remote  
ISUs, or initiate tests to check both the ISU 2x64 and the network  
connections. All command lines must begin with the AT charac-  
ter set in either capital or lower case letters. A command line can  
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Chapter 6. Configuration  
be terminated at any time by transmitting the CTRL+X (ASCII  
018) after the AT attention code. The ISU 2x64 ignores this com-  
mand line and issues an OK response.  
The command line may contain a single command or a series of  
commands after the AT attention code. When a series of com-  
mands are used, the individual commands may be separated  
with spaces for readability.  
The maximum length for a command line is 40 characters. Each  
command line is executed by the ISU 2x64 upon receipt of a ter-  
minating character.  
The default terminating character is a carriage return (ASCII 013),  
but it can be changed by writing a different value to register S3.  
Before the terminating character is transmitted, the command  
line can be edited by using the backspace character (ASCII 008) to  
erase errors so the proper commands can be entered. Examples  
of using AT commands are as follows.  
Using an AT Command  
Type AT followed by the letter of the command and numeric  
value of the setting desired and then press Enter.  
Example: ATI1  
Returns the software version of the unit.  
Using S-Registers  
The configuration of the ISU 2x64 can be changed and/or  
reviewed with S-registers. See the appendix S-Register List for a  
description of each S-register and its corresponding range of val-  
ues.  
Reading an S-Register  
Type ATS followed by the number of the S-register to be read fol-  
lowed by a question mark and press Enter.  
Example: ATS0?  
The ISU 2x64 uses S-register strings to store strings of digits for  
stored phone numbers, SPIDs, etc.  
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Chapter 6. Configuration  
Reading an S-register String  
Type ATSS followed by the number of the string S-register to be  
read followed by a question mark and press Enter.  
Example: ATSS80?  
To Change an S-register  
Type ATS followed by the number of the S-register to be  
changed, an equal sign, the numeric value to be assigned to the  
register, then press Enter.  
Example: ATS0=2  
Changing a String S-register  
Type ATSS followed by the number of the string S-register to be  
changed, an equal sign, the numeric string to be assigned to the  
register, then press Enter.  
Example: ATSS80=5551212  
Dialing a Call by the AT Command Processor  
To dial a call using the DTE terminal and AT commands; type  
ATD and the telephone number on one line and press Enter.  
Example: ATD5551212  
When the dialing process begins, the front panel reads Dialing  
5551212. If the call is successful, Connect is displayed on the  
front panel, followed by the rate adaptation protocol in use and  
the bit rate. If the call is not successful, the front panel displays  
Disconnect followed by Ready. At this point the unit is ready for  
another call. The status buffer can be examined to find the reason  
for an unsuccessful call.  
To end an active call with the AT command processor press the  
break in key sequence , +++ or the redefined key, then type ATH  
and press Enter to hang up the line.  
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Chapter 6. Configuration  
V.25  
Configuring the ISU 2x64 for V.25 bis (see Figure 6-5) enables  
inband dialing over a DTE interface using asynchronous or syn-  
chronous V.25 bis commands. V.25 bis can be used to establish  
and end a call. Disconnecting calls can also be done from the  
front panel (as described previously), from a VT 100 terminal, or  
from the far-end unit.  
V.25 bis dialing is used primarily by DTE with synchronous inter-  
faces (HDLC/SDLC or BSC/BISYNC) not supporting the AT  
command set, which is commonly used by asynchronous  
devices. The ISU 2x64 supports V.25 bis inband dialing in accor-  
dance with Fascicle V.III-V.25 bis (Malaga-Torremolinos 1984,  
Melbourne 1988).  
1=Switch protocl  
2=Call type  
1=Front Panel  
1=Dial Line  
3=Terminal ID  
2=RS-366  
1=Netw. options  
2=DTE options  
3=Protocol  
2=Leased Line  
4=Busy Out  
1=V.25 HDLC  
3=AT commands  
4=V.25  
3=CONFIG  
5=Dial options  
6=Auto answer  
7=Answer tone  
8=Connect Timout  
9=Call Screening  
10=SBus Terminati  
2=V.25 ASYNC  
3=V.25 BISYNC  
4=V.25 HDLC FLAG  
5=Disabled  
4=Quick setup  
5=Security  
6=Remote Config  
Figure 6-5  
Dial Options, V.25 bis Menu Tree  
Recommendation V.25 uses the following DCE/DTE control sig-  
nals:  
Transmitted Data. . . . . . . . . . . . . . . . . . . . . . . . . . . .Circuit 103  
Received Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Circuit 104  
Ready for Sending. . . . . . . . . . . . . . . . . . . . . . . . . . .Circuit 106  
Data Set Ready. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Circuit 107  
Data Terminal Ready . . . . . . . . . . . . . . . . . . . . . . . .Circuit 108/2  
Calling Indicator . . . . . . . . . . . . . . . . . . . . . . . . . . . .Circuit 125  
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Chapter 6. Configuration  
The ISU supports the following V.25 bis commands to control  
automatic calling and answering:  
CRN . . . . . . . . . . . . . . . . . . . . Call Request (number in command)  
CRS . . . . . . . . . . . . . . . . . . . . . Call Request (using stored number)  
PRN . . . . . . . . . . . . . . . . . . . . Program Stored Number  
RLN . . . . . . . . . . . . . . . . . . . . List Stored Number  
CIC . . . . . . . . . . . . . . . . . . . . . Connect Incoming Call  
DIC . . . . . . . . . . . . . . . . . . . . . Disconnect Incoming Call  
When using stored numbers, V.25 bis accesses stored numbers 1 through  
9 used by front panel dialing. See Front Panel Dialing Options on  
page 63.  
The following configuration (see Figure 6-6) for Auto answer  
should be selected if V.25 bis is in control of answering incoming  
calls with the CIC/DIC commands, since the other settings for  
Auto answer will override V.25 control of the answer function.  
1=Switch protocl  
2=Call type  
3=Terminal ID  
1=Dial Line  
4=Busy Out  
1=Netw. options  
2=DTE options  
3=Protocol  
2=Leased Line  
1=Disabled  
2=Enabled  
5=Dial options  
3=CONFIG  
6=Auto answer  
7=Answer tone  
8=Connect Timout  
9=Call Screening  
10=SBus Terminati  
3=Dump all calls  
4=Quick setup  
5=Security  
6=Remote Config  
Figure 6-6  
Dial Line, Auto Answer Menu Tree  
V.25 ASYNC Dialing  
V.25 bis specifies that the characters should be ASCII, 7 bits, even  
parity and one stop bit. However, for versatility the ISU 2x64  
allows the data bits, parity, and stop bits as defined under Data  
Format. (See Figure 6-7.)  
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Chapter 6. Configuration  
1=Bit Rate  
2=Connector Type  
3=RTS Options  
4=CTS Options  
5=CD Options  
6=DTR Options  
7=DSR Options  
8=Flow Control  
9=Data Format  
1=Netw. options  
2=DTE options  
3=Protocol  
1=Asynchronous  
3=CONFIG  
2=Synchronous  
4=Quick setup  
5=Security  
1=8 Data bits  
2=7 Data bits  
1=Data Bits  
2=Parity Bits  
3=Stop Bits  
6=Remote Config  
Figure 6-7  
Data Bits Menu Tree  
The setting in Figure 6-8 allows for V.25 bis messages in asyn-  
chronous (start/stop) data format.  
1=Switch protocl  
2=Call type  
1=Front Panel  
1=Dial Line  
3=Terminal ID  
2=RS-366  
1=Netw. options  
2=DTE options  
3=Protocol  
2=Leased Line  
4=Busy Out  
1=V.25 HDLC  
3=AT commands  
4=V.25  
5=Dial options  
6=Auto answer  
7=Answer tone  
8=Connect Timout  
9=Call Screening  
10=SBus Terminati  
3=CONFIG  
2=V.25 ASYNC  
3=V.25 BISYNC  
4=V.25 HDLC FLAG  
5=Disabled  
4=Quick setup  
5=Securtiy  
6=Remote Config  
Figure 6-8  
V.25 bis ASYNC Menu Tree  
Although V.25 bis allows asynchronous data format, asynchro-  
nous DTE is more likely to support the AT command set than  
V.25 bis.  
V.25 SYNC HDLC Dialing  
To set the Dial Options for V.25 HDLC, choose 1=V.25 HDLC  
from the front panel or the VT 100 terminal (see Figure 6-8 for the  
menu tree). This setting provides V.25 bis messages in bit-syn-  
chronous format (for example HDLC, SDLC, X.25). The bit-syn-  
chronous format is the most commonly used by V.25 bis.  
This option specifies that the characters should be 7-bit ASCII,  
with the 8th bit ignored (it may be either 0 or 1).  
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Chapter 6. Configuration  
The first byte of each packet contains all ones (A = FF HEX), and  
the second byte of each packet (the C byte) is either 13 HEX or 03  
HEX if not the final packet.  
V.25 SYNC BISYNC Dialing  
To set the Dial Options for V.25 BISYNC, choose 3=V.25 BISYNC  
from the front panel or the VT 100 terminal (see Figure 6-8 for  
menu tree). This setting allows for V.25 bis messages in byte syn-  
chronous format (BISYNC). V.25 bis specifies that the characters  
should be ASCII, 7 bits, and odd parity. This setting allows syn-  
chronous data terminal equipment which does not use HDLC to  
support serial inband dialing.  
V.25 HDLC FLAG  
To set the Dial Options for V.25 HDLC FLAG, choose 4=V.25  
HDLC FLAG from the front panel or the VT 100 terminal (see Fig-  
ure 6-8 for menu tree). Configuring the ISU 2x64 for HDLC  
FLAG V.25 bis enables in-band dialing over a DTE interface using  
standard synchronous HDLC V.25 bis commands with 7E HEX  
idle.  
Disabled  
This selection disables in-band dialing over the DTE interface.  
Setting Auto Answer  
Auto answer is configured separately for both DTE#1 and  
DTE#2. Using the front panel, select the appropriate DTE with  
either arrow key and press Enter. When using a VT 100 terminal,  
select the option number corresponding to the appropriate DTE  
and press Return.  
The ISU 2x64 can be configured to automatically answer in one of  
three ways: Disabled, Enabled, or Dump all calls.  
Disabled  
When Disabled is selected, the ISU 2x64 will not answer the call.  
The AT answer command (ATA) must be issued to the ISU 2x64  
for it to accept the incoming call or by selecting Answer Call  
from dial menu. The ringing call can be dumped by using the  
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Chapter 6. Configuration  
Hang up line command or answered using the Answer Call  
command. (These commands are found under the Dial branch of  
the menu tree. See Front Panel Dialing Options on page 63.)  
Enabled  
When Enabled is selected, the incoming call is answered. If that  
call is a BONDING call and requires two B channels, the second  
call is answered. The port assigned to that second SPID-LDN  
pair is disabled during the duration of the BONDING call.  
Dump all calls  
When Dump all calls is selected, the ISU 2x64 does not accept  
any incoming calls. This keeps the line clear for outgoing calls.  
Setting Answer Tone  
Answer tone is configured separately for both DTE#1 and  
DTE#2. Using the front panel, select the appropriate DTE with  
either arrow key and press Enter. (See Figure 6-9.) When using a  
VT 100 terminal, select the option number corresponding to the  
appropriate DTE and press Return.  
The Answer tone option enables the transmission of a modem  
answer tone at the start of voice and audio calls. The purpose of  
this tone is to disable echo suppression for echo cancellation on  
the circuit in order to get a clear digital circuit. This may be nec-  
essary on some long distance circuits. The specifics of the tone  
are 4 seconds, 2100 Hz at a -10 dB level with phase reversals  
every 475 µs.  
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1=Switch protocl  
2=Call type  
3=Terminal ID  
4=Busy Out  
1=Dial Line  
1=Netw. options  
2=Leased Line  
1=No Answer tone  
2=Incoming tone  
3=Outgoing tone  
4=Always tone  
5=Dial options  
6=Auto answer  
7=Answer tone  
8=Connect Timout  
9=Call Screening  
10=SBus Terminati  
2=DTE options  
3=Protocol  
3=CONFIG  
4=Quick setup  
5=Security  
6=Remote Config  
Figure 6-9  
Answer Tone Menu Tree  
No Answer tone (Default)  
This option disables the Answer tone on all calls.  
This option enables the Answer tone on incoming calls.  
This option enables the Answer tone on outgoing calls.  
Incoming tone  
Outgoing tone  
Always tone  
This option enables the Answer tone on either incoming or out-  
going calls.  
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Chapter 6. Configuration  
Setting Connect Timout  
Connect Timout sets the length of time that the ISU 2x64 waits  
for a far-end unit to answer an outgoing call. These choices are  
illustrated in Figure 6-10.  
1=Switch protocl  
2=Call type  
1=Dial Line  
3=Terminal ID  
1=Netw. options  
2=DTE options  
3=Protocol  
2=Leased Line  
4=Busy Out  
1=15 sec  
3=CONFIG  
5=Dial options  
2=30 sec (def)  
3=1 Minute  
4=2 Minute  
5=4 Minute  
6=Auto answer  
7=Answer tone  
8=Connect Timout  
9=Call Screening  
10=SBus Terminati  
4=Quick setup  
5=Security  
6=Remote Config  
Figure 6-10  
Connect Timout Menu Tree  
Setting Call Screening  
Call Screening allows the ISU 2x64 to either answer all incoming calls  
(default) or only calls originating from phone numbers stored in the  
DIAL menu as stored numbers SN0 through SN9. See Front Panel  
Dialing Options on page 63 to review how to store numbers. Figure  
6-11 illustrates the menu tree for setting call screening.  
1=Switch protocl  
2=Call type  
1=Dial Line  
3=Terminal ID  
1=Netw. options  
2=DTE options  
3=Protocol  
2=Leased Line  
4=Busy Out  
3=CONFIG  
5=Dial options  
6=Auto answer  
7=Answer tone  
8=Connect Timout  
9=Call Screening  
10=SBus Terminati  
4=Quick setup  
5=Security  
1=Answer any  
2=Ansr if SN0. . .9  
6=Remote Config  
Figure 6-11  
Call Screening Menu Tree  
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Chapter 6. Configuration  
When Call Screening is set to Ansr if SN0. . .9, an incoming call  
is not answered if the Call ID received from the switch does not  
match a stored number. Depending on the switch type, the Call  
ID may be presented in either a seven- or ten-digit format. The  
ISU 2x64 displays the Call ID for all dumped calls in the Status  
Buffer. See Status Buffer on page 20 for more information.  
Because different switches handle calls and Call ID differently,  
first find out if the switch uses a seven- or ten-digit Call ID for-  
mat. Use the following procedure to determine if a seven- or ten-  
digit Call ID (phone number) should be stored.  
1. Select Ansr if SN0. . .9 under Call Screening.  
2. Store the seven-digit number in SN0.  
3. Place a call to the ISU 2x64 with the stored number to see if it  
answers properly.  
4. If the ISU 2x64 does not answer the call, check the Call ID  
message in the Status Buffer. More than likely, the Call ID  
number will be a ten-digit number.  
5. Reenter the number in SN0 as it is displayed in the Call ID  
message and test Call Screening again.  
SBus Termination  
Use the SBus Termination option (see Figure 6-12) to select 100  
ohm termination resistors for the S/T interface on ISU 2x64 units  
that are equipped for the ISDN S/T interface. These units (part  
numbers 1200051L2, 1200051L4, 1200051L5, and 1200051L6) con-  
nect to the S/T interface of an NT1 device or the S/T line card.  
1=Dial Line  
1=Switch protocl  
1=Netw. options  
2=DTE options  
3=Protocol  
2=Leased Line  
2=Call type  
3=CONFIG  
3=Terminal ID  
4=Busy Out  
4=Quick setup  
5=Security  
5=Dial options  
6=Auto answer  
7=Answer tone  
8=Connect Timout  
9=Call Screening  
0=SBus Terminati  
6=Remote Config  
1=100 ohm On  
2=100 ohm Off  
Figure 6-12  
SBus Termination Menu Tree  
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Chapter 6. Configuration  
Select 100 ohm On to turn on the 100 ohm termination resistance  
across the S/T transmit and receive pairs. Select 100 ohm Off to  
turn off the 100 ohm termination resistance across the S/T trans-  
mit and receive pairs.  
The SBus Termination resistors are not present on ISU 2x64 units  
equipped with the integrated NT1 (part numbers 1200051L1 and  
1200051L3). Setting the SBus Termination resistance to on or off  
on these units has no effect on their operation and can be ignored.  
LEASED LINE SERVICE  
This section explains how to configure the ISU 2x64 when using a  
2B1Q leased digital service or a service providing a permanent con-  
nection between end points. The distance can be up to 18000 feet.  
1=Slave  
2=Master  
1=Clock mode  
2=Channel rate  
3=SBus Terminati  
1=Dial Line  
1=64k  
2=128k  
1=Netw. options  
2=DTE options  
3=Protocol  
2=Leased Line  
3=CONFIG  
1=100 ohm On  
2=100 ohm Off  
4=Quick setup  
5=Security  
6=Remote Config  
Figure 6-13  
Leased Line Menu Tree  
Selecting Leased Line configures the unit for leased line service  
or service providing a permanent connection between end points  
such as limited distance modem or LDM service.  
Follow this step-by-step procedure to configure the ISU 2x64 for  
Leased Line, Clock mode, Channel rate, and S Bus Termination.  
Clock mode: Slave/Master  
By configuring the ISU 2x64 for Master timing, the ISU 2x64 can  
provide clocking for both ends of the phone line. This Master  
option is intended to be used at one end of a limited distance  
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Chapter 6. Configuration  
modem application, where two ISU 2x64 units are directly con-  
nected without the use of channel banks (see Figure 6-14). The  
far-end unit should be configured for Slave and derives its clock-  
ing from the ISU 2x64 configured as Master.  
64K  
64K  
64K  
18 kFt  
64K  
ISU 128  
ISU 128  
ENTER  
1
4
7
#
2
5
8
0
3
6
9
ENTER  
1
4
7
#
2
5
8
0
3
6
9
RS CS TD  
RD LD TR SR  
RS CS TD  
RD LD TR SR  
CANCEL  
CANCEL  
*
*
Mixed Gauge Wire  
ISU 2x64 (U-interface)  
ISU 2x64 (U-interface)  
LDM 64 Master  
Channel Rate = 64K  
DTE  
DTE  
Leased 64K  
Channel Rate = 64K  
Figure 6-14  
Limited Distance Modem Applications  
If two ISU 2x64 units are connected through channel banks, both  
units should be configured for Slave mode (see Figure 6-15).  
BIMUX DP  
or Equivalent  
BIMUX DP  
or Equivalent  
64K  
64K  
T1  
XXXXX  
X X X X X  
X X X X X  
XXXXX  
XXXXXXXXX  
X X X X X X X X X  
64K  
64K  
ISU 128  
ISU 128  
ENTER  
1
4
7
#
2
5
8
0
3
6
9
ENTER  
1
4
7
#
2
5
8
0
3
6
9
R
S
C
S
T
D
R
D
L
D
T
R
S
R
R
S
C
S
T
D
R
D
L
D
T
R
SR  
CANCEL  
CANCEL  
*
*
ISU 2x64  
Channel Rate = 64K  
ISU 2x64  
Channel Rate = 64K  
DTE  
DTE  
Figure 6-15  
Leased Application with Channel Banks  
Channel Rate  
In Leased Line operation, the channel rate for the ISU 2x64 can be  
configured for 64 kbps or 128 kbps. When the channel rate is set  
to 64 kbps, each DTE port is assigned one of the bearer channels.  
For example, if two ISU 2x64 units are configured for leased line  
service and the channel rate is set to 64 kbps in both units, then  
DTE#1 of the master unit and DTE#1 of the slave unit would be  
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Chapter 6. Configuration  
connected through one of the bearer channels and could utilize  
up to 64 kbps of bandwidth. Likewise, DTE#2 of the master and  
DTE#2 of the slave would be connected through the other bearer  
channel and could also utilize up to 64 kbps of bandwidth (see  
Figure 6-15).  
When the channel rate is set for 128 kbps in both units, both  
bearer channels are assigned to one DTE port. This assignment is  
user-configured. Select a DTE rate higher than 64 kbps for the  
DTE port that will run the application requiring greater than 64  
kbps bandwidth. Select the same DTE port for both Master and  
Slave 2x64 units. Set the unused DTE port's DTE rate to a rate  
less than 64 kbps to facilitate correct operation between the two  
ISU 2x64 units.  
For example, if an application requiring 128 kbps was run  
through DTE#1, first configure the channel rate of the leased line  
to 128 kbps and set the DTE rate for DTE#1to 128 kbps synchro-  
nous. The DTE rate for DTE#2should be set at 56 kbps or lower.  
Enter these settings into both units. This allows an application to  
utilize up to 128 kbps of bandwidth between DTE#1on the mas-  
ter unit and DTE#1on the slave unit.  
SBus Termination  
SBus Termination selects 100 ohm termination resistors for the S/  
T interface on ISU 2x64 units that are equipped for the ISDN S/T  
interface. These units (part numbers 1200051L2, 1200051L4,  
1200051L5, and 1200051L6) connect to the S/T interface of an  
NT1 type device or the S/T line card.  
Select 100 ohm On to turn on the 100 ohm termination resistance  
across the S/T transmit and receive pairs. Select 100 ohm Off to  
turn off the 100 ohm termination resistance across the S/T trans-  
mit and receive pairs.  
The SBus Termination resistors are not present on ISU 2x64 units  
equipped with the integrated NT1 (part numbers 1200051L1 and  
1200051L3). Setting the SBus Termination resistance on these  
units has no effect on their operation and can be ignored.  
Units with S/T interface will not work in master mode.  
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Chapter 6. Configuration  
DTE Options for Asynchronous and Synchronous Operation  
The DTE options are configured separately for both DTE#1 and  
DTE#2. When using the front panel, select the appropriate DTE  
with either arrow key and press Enter. (See Figure 6-16 and 6-17.)  
When using the VT 100 terminal select the option number corre-  
sponding to the appropriate DTE and press Return.  
Ensure the DTE equipment is set for asynchronous operation before at-  
tempting to make an asynchronous call. Failure to do so causes the call  
attempt to fail.  
1=Bit Rate  
2=Connector Type  
3=RTS Options  
1=Netw. options  
4=CTS Options  
1=Asynchronous  
2=DTE options  
3=CONFIG  
5=CD Options  
6=DTR Options  
7=DSR Options  
8=Flow Control  
9=Data Format  
2=Synchronous  
3=Protocol  
4=Quick setup  
5=Security  
6=Remote Config  
Figure 6-16  
Asynchronous DTE Options Menu Tree  
1=Bit Rate  
2=Connector Type  
3=RTS Options  
4=CTS Options  
1=Netw. options  
2=DTE options  
3=Protocol  
1=Asynchronous  
2=Synchronous  
3=CONFIG  
5=CD Options  
6=DTR Options  
7=DSR Options  
8=Transmit Clock  
4=Quick setup  
5=Security  
6=Remote Config  
Figure 6-17  
Synchronous DTE Options Menu Tree  
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Chapter 6. Configuration  
Bit Rate  
The Bit Rate can be set asynchronously for 300, 1200, 2400, 4800,  
9600, 19200, 38400, 57600, and 115200 bps.  
The Bit Rate can be set synchronously for 2400, 4800, 9600, 19200,  
38400, 48000, 56000, 64000, 112000, and 128000 bps.  
Connector Type  
The ISU 2x64 can provide either an EIA-232, RS-530, or V.35 inter-  
face to a user DTE by selecting the desired connector type. The  
V.35 interface requires the RS-530/232-to-V.35 adapter, part num-  
ber 1200072L1.  
RTS Options  
1 ms delay causes the Clear to Send signal to change state one  
millisecond after the DTE Request to Send signal changes state.  
The 18 ms delay causes the Clear to Send signal to change state  
18 milliseconds after the DTE Request to Send signal changes  
state.  
CTS Options  
CD Options  
Forced CTS causes the CTS signal on the DTE connector to be  
continually asserted. Follows RTS causes the CTS signal to fol-  
low the state of the RTS lead.  
CD Forced On causes the carrier detect (CD) signal to always be  
asserted. Normal causes the CD signal to be asserted when a call  
has been successfully established. Off with LOCD (local discon-  
nect) causes the CD signal to be disasserted for a period of 5 sec-  
onds and then be reasserted at the termination of a call. Off Link  
Down causes the CD signal to be disasserted when the ISDN  
interface is not ready.  
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Chapter 6. Configuration  
DTR Options  
Ignore DTR causes the ISU 2x64 to disregard the state of the data  
terminal ready (DTR) pin. Cmd when Off forces the unit into the  
AT command processor mode when DTR is not asserted. To  
return online, DTR must be asserted, followed by the AT0 com-  
mand. Idle when Off forces the unit to end the current call when  
DTR is no longer asserted. Off>On dial #0allows one call  
attempt to be automatically established when the DTR signal  
goes from inactive to active. While DTR is active, front panel  
dialing is also possible. When DTR goes inactive, any outgoing  
call present is disconnected. Off>On dial #0uses the phone  
number in stored number register 0 to establish the call. To store  
a number for automatic dialing, see the section Front Panel Dialing  
Options. Dial #0 if Onallows calls to be automatically estab-  
lished when the signal is in the active state. The unit attempts to  
establish a call using SN0 until the call is established or DTR goes  
inactive. Answer if On only allows the unit to answer an incom-  
ing call if DTR is asserted.  
DSR Options  
DSR forced on causes the data set ready (DSR) signal on the DTE  
connector to always be asserted. Off Idle+Test causes the DSR to  
be disasserted if the ISU 2x64 is in test or there is not an active  
call. Off Link Down causes the DSR signal to be disasserted  
when the ISDN interface is not ready.  
Flow Control (asynchronous data format)  
Selecting Hardware Flow (see Figure 6-18) allows the ISU 2x64  
received data to be presented to the DTE interface only when RTS  
(request to send) is asserted and allows DTE transmit data to be  
presented to the 2x64 when CTS is asserted. Software Flow con-  
trol uses XON/XOFF inband to control data transferred between  
the DTE and the ISU 2x64. Selecting No Flow Ctrl disables flow  
control. Either Hardware of Software flow control should be used  
when asynchronous BONDING or DTE rates higher than the  
effective loop rate are used (i.e., 115.2 kbps over 112 kbps loop  
rate).  
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Chapter 6. Configuration  
1=Bit Rate  
2=Connector Type  
3=RTS Options  
4=CTS Options  
5=CD Options  
1=Netw. options  
2=DTE options  
3=Protocol  
1=Asynchronous  
3=CONFIG  
2=Synchronous  
6=DTR Options  
7=DSR Options  
8=Flow Control  
9=Data Format  
4=Quick setup  
5=Security  
1=Hardware Flow  
2=Software Flow  
3=No Flow Ctrl  
6=Remote Config  
Figure 6-18  
Flow Control Menu Tree  
Data Format (asynchronous)  
A frame consists of a start bit, 7 or 8 Data bits, 0 or 1 Parity bit,  
and 1 to 2 Stop bits. The settings for Data Bits, Parity Bits, and  
Stop Bits are available as shown in Figure 6-19.  
1=Bit Rate  
2=Connector Type  
3=RTS Options  
1=Netw. options  
1=8 Data bits  
2=7 Data bits  
4=CTS Options  
5=CD Options  
6=DTR Options  
7=DSR Options  
8=Flow Control  
9=Data Format  
1=Asynchronous  
1=Data Bits  
2=Parity Bits  
3=Stop Bits  
2=DTE options  
3=Protocol  
3=CONFIG  
2=Synchronous  
1=None  
2=Odd  
3=Even  
4=Quick setup  
5=Security  
6=Remote Config  
1=1 Stop bit  
2=1.5 Stop bits  
3=2 Stop bits  
Figure 6-19  
Data Format Menu Tree  
Transmit Clock (synchronous data format)  
Selecting the Normal option causes the ISU 2x64 to be the syn-  
chronous DTE interface transmit timing source. Transmit data is  
timed from the transmit clock provided by the ISU 2x64. With  
the External option selected, the ISU 2x64 slaves to an external  
transmit timing source. The external clock is provided to the ISU  
2x64 by the external transmit clock signal at the DTE connector.  
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Chapter 6. Configuration  
This signal is echoed by the ISU 2x64 to the transmit clock signal  
on the DTE connector. See Figure 6-20 for the menu tree.  
1=Bit Rate  
2=Connector Type  
3=RTS Options  
1=Netw. options  
4=CTS Options  
5=CD Options  
1=Asynchronous  
2=DTE options  
3=Protocol  
3=CONFIG  
2=Synchronous  
6=DTR Options  
7=DSR Options  
8=Transmit Clock  
4=Quick setup  
5=Security  
1=Normal  
2=External  
6=Remote Config  
Figure 6-20  
Transmit Clock Menu Tree  
Autobaud  
The ISU 2x64 has a DTE rate adjustment feature (autobaud)  
which automatically adjusts the bit rate on the DTE port connec-  
tor to match that of the connected terminal. For any terminal rate  
from 300 bps through 115.2 kbps, type AT and a carriage return.  
The ISU 2x64 will adjust to that rate. The DTE port must be set for  
AT commands under Dial Options for autobaud to become acti-  
vated on a port .  
The autobaud feature is only allowed to be active on one DTE  
port at a time. If both DTE#1 and DTE#2 are set for AT com-  
mands (under Dial Options), then autobaud will be active on  
DTE#2 only. To make autobaud active on DTE#1, change the Dial  
Options on DTE#2 from AT commands to some other available  
dialing option.  
When autobaud is not active on a DTE port, the asynchronous  
rate of the DTE port matches the rate programmed into the ISU  
2x64 at the current time. While autobaud is running on a port,  
that port meets Microsoft Windows® 95 Plug-and-Play specifica-  
tions. The file MDMADTN.INF is required. To obtain this file,  
contact ADTRAN Technical Support as shown on the inside back  
cover of this manual.  
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Chapter 6. Configuration  
Setting Protocol Options  
The ISU 2x64 communicates with many different types of tele-  
communication equipment including other ISU 2x64s, ISDN ter-  
minal adapters, Switched 56 DSUs, and BONDING-compatible  
inverse multiplexers. Communicating between such diverse  
types of equipment requires various rate adaptation protocols to  
support various bit rates and DTE settings. See Figure 6-21 for  
the menu tree. The ISU 2x64 supports the following rate adapta-  
tion protocols:  
Clear Channel (no rate adaptation protocol) (synch. only)  
BONDING mode 1 (Bandwidth on Demand Interoperability  
Group)  
CCITT V.120  
CCITT V.110  
DSU 57.6 ASYNC  
T-LINK (Dial DDS DSU/CSU)  
SAP (Simple ADTRAN Protocol)  
FALLBACK  
PPP async-sync  
1=Clear Channel  
1=Netw. options  
2=BONDING mode 1  
2=DTE options  
3=CONFIG  
3=V.120  
3=Protocol  
4=V.110  
4=Quick setup  
5=Security  
5=DSU 57.6 ASYNC  
6=T-LINK  
6=Remote Config  
7=SAP  
8=FALLBACK  
9=PPP async-sync  
Figure 6-21  
Protocol Menu Tree  
See Recommended Operating Protocols on page 6 for more informa-  
tion on recommended modes of operation.  
The desired protocol may be selected with AT commands at the  
DTE port or from the ISU 2x64 front panel. A description of pro-  
tocols follows.  
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Chapter 6. Configuration  
Clear Channel  
Clear channel provides the entire bearer channel to the DTE with-  
out regard to data format or protocol. This provides a rate adap-  
tation at or near the ISDN circuit rate. The primary usage for  
Clear Channel in dial line mode is 56 kbps and 64 kbps synchro-  
nous. It is useful when the DTE performs its own internal syn-  
chronous protocol/rate adaptation or the ISU 2x64 is calling a 4-  
wire Switched 56 DSU. In the leased line mode, clear channel can  
provide synchronous bit rates of 56 kbps, 64 kbps, 112 kbps, and  
128 kbps.  
BONDING mode 1  
The BONDING mode 1 protocol allows the ISU 2x64 to commu-  
nicate at bit rates in excess of 64 kbps to a maximum of 128 kbps.  
BONDING provides high-speed communication between ISU  
2x64s, ISDN TE/TAs, and inverse multiplexing equipment sup-  
porting the BONDING protocol. The protocol allows for the use  
of both synchronous and asynchronous bit rates. When the ISU  
2x64 uses the BONDING mode 1 protocol, it must make two sep-  
arate ISDN phone calls to seize control of both ISDN bearer chan-  
nels. The protocol corrects any delays existing between the two  
bearer channels and presents a single high-speed data channel to  
the DTE. For successful high-speed operation, both the near- and  
far-end DCE need to be configured to use BONDING mode 1  
protocol. BONDING mode 1 protocol negotiation phase has  
numerous timers to allow for transmission delays due to satellite  
hops, international calls, etc. The timers may be adjusted if neces-  
sary by entering into BONDING mode 1 submenu. See Figure 6-  
22 for the menu tree.  
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Chapter 6. Configuration  
1=TXINIT  
2=TXFA  
1=Clear Channel  
2=BONDING mode 1  
3=V.120  
3=TXADD01  
4=TXDEQ  
5=TANULL  
6=TCID  
1=Netw. options  
2=DTE options  
3=Protocol  
3=CONFIG  
4=V.110  
4=Quick setup  
5=Security  
5=DSU 57.6 ASYNC  
6=T-LINK  
7= Async. Rev.  
6=Remote Config  
7=SAP  
8=FALLBACK  
9=PPP async-sync  
Figure 6-22  
Protocol BONDING, Mode 1 Menu Tree  
The timers are defined as follows:  
TXINIT  
This option specifies the length of time the originating endpoint  
attempts to detect BONDING negotiation pattern from the  
answering endpoint before determining the BONDING call has  
failed. In general, this timer value should be left at the factory  
default setting of 10 seconds. Select from values of 1, 2, 5, 10  
(default), 20, 50, 100, and 200 seconds.  
TXFA  
This option specifies the length of time both endpoints attempt to  
detect the BONDING frame pattern when a call is connected  
before determining the BONDING call has failed. This timer  
value should be left at the factory default setting of 10 seconds.  
However, when interoperating with other manufacturers’  
BONDING equipment it may be necessary to lengthen this timer  
to match TXADD01. Values of 1, 2, 5, 10 (default), 20, 50, 100, and  
200 seconds may be selected.  
TXADD01  
This option specifies the length of time both endpoints wait for  
the additional call to be connected at the end of negotiation  
before determining the BONDING call has failed. The factory  
default setting of 20 seconds is sufficient for most calls to go  
through, although when dialing overseas it may be necessary to  
lengthen this timer to allow for slower call routing. Values of 1, 2,  
5, 10, 20, 50 (default), 100, and 200 seconds may be selected.  
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Chapter 6. Configuration  
TXDEQ  
This option specifies the length of time both endpoints attempt to  
equalize the network delay between the bearer channels before  
determining the BONDING call has failed. Values of 1, 2, 5, 10,  
20, 50 (default), 100, and 200 seconds may be selected.  
TANULL  
This option specifies the length of time the answering endpoint  
attempts to detect the BONDING negotiation pattern from the  
originating endpoint before aborting to clear channel mode. In  
general, this timer value should be left at the factory default set-  
ting of 10 seconds. However, it may be necessary to shorten this  
timer if the DTE equipment connected to the ISU also has timer  
constraints for completing non-BONDING parameter negotia-  
tion. Values of 1, 2, 5, 10 (default), 20, 50, 100, and 200 seconds  
may be selected.  
TCID  
This option specifies the length of time both endpoints attempt to  
negotiate an agreeable value for bearer channels and channel  
capacities before determining the BONDING call has failed.  
Select from values of 1, 2, 5 (default), 10, 20, 50, 100, and 200 sec-  
onds.  
Async. Rev.  
This option specifies the negotiation revision for asynchronous  
BONDING. Rev. 1 specifies multi-vendor compatible negotiation.  
Rev. 0 specifies ADTRAN proprietary negotiation. This option  
has no effect on synchronous negotiation.  
V.120  
The V.120 protocol is a CCITT compliant rate adaptation method  
providing DTE service between the ISU 2x64 and other V.120  
compliant devices at rates less than the 64 kpbs ISDN bearer  
channel rate. V.120 supports both synchronous and asynchro-  
nous DTE rates. See Recommended Operating Protocols on page 6  
for available V.120 rates. Figure 6-21 illustrates the menu path for  
selecting V.120.  
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Chapter 6. Configuration  
V.110  
The V.110 protocol is a CCITT compliant rate adaptation method  
providing DTE service between the ISU 2x64 Dual Port ISDN Ser-  
vice Unit and other V.110 compliant devices. The V.110 protocol  
supports both synchronous and asynchronous DTE rates. See the  
section Recommended Operating Modes and Table 1-B for available  
V.110 rates. Figure 6-21 illustrates the menu path for selecting  
V.110.  
DSU 57.6 ASYNC  
The DSU 57.6 ASYNC protocol allows the ISU 2x64 to communi-  
cate asynchronously at 57.6 kbps with ADTRAN 2-and 4-wire  
Switched 56 DSU products. In addition, the ISU 2x64 communi-  
cates with other ISUs over dial and leased connections using this  
protocol. Figure 6-21 illustrates the menu path for selecting DSU  
57.6 ASYNC.  
T-Link  
The T-Link protocol allows the ISU 2x64 to communicate with 2-  
wire Switched 56 DataPath DUs. The T-Link protocol performs  
two functions:  
It adapts the data rate of sub 64 kbps DTE devices to the 64  
kbps bandwidth of the ISDN bearer channel.  
For asynchronous and synchronous DTE rates up to 19.2  
kbps, T-Link transmits the status of the DCE-DTE EIA leads  
to facilitate flow control and maintenance.  
In addition to 2-wire Switched 56 DataPath DUs, the ISU 2x64  
communicates with any other device using the T-Link protocol.  
Figure 6-21 illustrates the menu path for selecting T-Link.  
SAP  
The Simple ADTRAN Protocol (SAP) is a rate adaptation method  
which provides DTE service between ISU 2x64 units at a channel  
rate lower than the 64 kbps ISDN bearer. Selecting this menu  
item causes the ISU 2x64 to use SAP protocol.  
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Chapter 6. Configuration  
The primary usage for SAP is general purpose asynchronous rate  
adaptation in a dial-up or leased environment. SAP only oper-  
ates on a 64 kbps data link. Figure 6-21 illustrates the menu path  
for selecting SAP.  
FALLBACK  
The FALLBACK asynchronous rate adaptation protocol provides  
the capability to automatically establish calls with other ISDN  
terminal adapters and Switched 56 DSUs, as well as other ISUs  
using a single configuration. The ISU 2x64 must be optioned as  
follows for FALLBACK operation:  
1. Any asynchronous bit rate up to 115.2 kbps which is support-  
ed by the DTE.  
2. Flow control must be enabled and supported by the DTE.  
FALLBACK supports the following protocols based on the Call  
Type: BONDING mode 1, V.120, and T-Link. Figure 6-21 illus-  
trates the menu path for selecting FALLBACK.  
When answering calls, the ISU 2x64 uses the incoming call type  
to determine which rate adaptation protocols to support.  
Table 6-A  
Rate Adaptation Protocols  
Rate Adaption Protocols  
Typical Units Supported  
Supported  
Call Type  
Data 64 k  
Bonding mode 1  
V.120  
ISUs  
ISDN TAs  
PPP async-sync  
PPP compatible bridges/routers  
Data 56 k  
BONDING mode 1  
V.120  
ISUs  
ISDN TAs  
PPP async-sync  
T-Link  
PPP compatible bridges/routers  
2-wire Switched 56 DSUs  
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Chapter 6. Configuration  
When originating calls to unknown units, the ISU begins its pro-  
tocol selection based on its local Call Type. (Data 64k is used for  
FALLBACK when selected from the Quick Setup menu.) Upon  
connection at 64k Call Type, BONDING, V.120, and PPP are  
attempted. If connection is not made at 64k, the ISU attempts  
another call at 56k Call Type. If the protocol cannot be negoti-  
ated, the ISU hangs up the call.  
Point-to-Point (PPP) Async-to-Sync  
PPP provides a standard method for transporting multi-protocol  
datagrams over point-to-point links. The ADTRAN PPP async-  
sync protocol allows the ISU 2X64 and a PC or Macintosh® run-  
ning PPP software, to communicate with a PPP-compatible  
bridge or router. The PPP async-sync protocol complies with  
Internet Engineering Task Force (IETF) RFC 1662. The menu path  
to select PPP is shown in Figure 6-23.  
The asynchronous control character map (ACCM) option is  
scanned during the negotiation. When the ACCM option is seen  
in a configure ACK link control packet, it is adopted by the ISU  
2x64. In addition, when the ACCM option is not seen in the con-  
figure-request packet from the network, the ISU 2x64 will add it  
to the packet.  
1=Clear Channel  
1=Netw. options  
2=BONDING mode 1  
2=DTE options  
3=CONFIG  
3=V.120  
3=Protocol  
4=V.110  
4=Quick setup  
5=Security  
5=DSU 57.6 ASYNC  
6=T-LINK  
6=Remote Config  
7=SAP  
8=FALLBACK  
9=PPP async-sync  
1=PPP  
2=Multilink PPP  
3=PPP w/Comp  
Figure 6-23  
PPP Menu Tree  
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Chapter 6. Configuration  
Point-to-Point Protocol (PPP)  
The ISU 2x64 can be configured for PPP from the protocol options  
of the configuration menu by selecting 1=PPP or by setting S-reg-  
ister S27 to a value of 0. The menu path is shown in Figure 6-23.  
Multilink PPP  
The ISU 2x64 can be configured for multilink PPP from the proto-  
col options of the configuration menu by selecting 2= Multilink  
PPP or by setting S-register S27 to a value of 1. (See Figure 6-23.)  
In this mode, the ISU 2x64 dials a second number to establish a  
second point-to-point link. Once the second PPP is established,  
multilink PPP is performed over both B-channels.  
The phone number for the second call should be placed in stored  
number 1 (SN1). If no number is stored in SN1, the same phone  
number is dialed to establish the second link.  
PPP with Compression  
The ISU 2x64 can be configured for PPP with compression from  
the protocol options of the configuration menu by selecting  
3=PPP w/Comp or by setting S-register S27 to a value of 2. The  
menu path is shown in Figure 6-23.  
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Chapter 7  
Dial Options  
FRONT PANEL DIALING OPTIONS  
Selecting 4=DIAL or pressing the #key from the front panel dis-  
plays the available dialing options (see Figure 7-2). Access the VT  
100 Terminal Dial Options Screen (Figure 7-1) by pressing Ctrl+D  
from any screen. The dial options are only available when the  
ISU is configured for Dial Line operation (not Leased Line).  
Figure 7-1  
VT 100 Dial Options Screen  
1=Hang up line  
2=Dial number  
4=DIAL  
3=Redial last #  
4=Answer Call  
5=Dial stored #  
6=Store/Review #  
Figure 7-2  
Dial Menu Tree  
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Chapter 7.Dial Options  
Hang up line  
Terminates current call.  
Dial number  
Enter and dial a number from the keypad. If an error is made,  
press the Down arrow to edit the number. After the number is  
entered, press Enter to dial the number and save as stored num-  
ber 9 for redialing purposes.  
Redial last #  
Answer Call  
Dial stored #  
Redial the last number called (or attempted) from the front panel. This  
number is saved as stored number 9 from the last attempted phone call.  
Selectively answer incoming calls when Auto answer is configured for  
disable. (Auto answer is described in the section Setting Auto Answer.)  
Dial one of ten stored phone numbers. The Up and Down arrows  
permit viewing/selection of a stored number. Press Enter to dial  
number and save as stored number 9 (SN9) for redial purposes.  
Store/Review #  
Enter and review stored numbers. Press the Up and Down  
arrows to scroll through the 10 stored numbers (SN0 - SN9). To  
store a number, scroll to the desired stored number location, enter  
the number to be stored, and press Enter to save the number. If  
an error is made, use the Up and Down arrows to edit the num-  
ber. Press Enter to save the number and exit. Press Cancel to exit  
without changing the number.  
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Chapter 8  
Quick Setup  
QUICK SETUP CONFIGURATION  
To configure the DTE Options quickly and easily, the Quick Set-  
up menu is available to automatically set up the nine most com-  
mon DTE configurations. (See Figure 8-1.) For fine-tuning a  
particular application and DTE settings, see DTE Options for Asyn-  
chronous and Synchronous Operation on page 50 for step-by-step  
procedures for detailed configuration of the DTE Options.  
1=Dial 56K sync  
1=Netw. options  
2=Dial 64K sync  
2=DTE options  
3=CONFIG  
3=Dial 112K sync  
4=Dial 128K sync  
5=Dial 57.6 asyn  
6=Dial 115.2 asy  
7=Fallback 57.6k  
8=Leased 64K  
3=Protocol  
4=Quick setup  
5=Security  
6=Remote Config  
9=Ldm 64K Master  
Figure 8-1  
Quick Setup Menu Tree  
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Chapter 8. Quick Setup  
Quick Setup  
To aid in configuring the ISU 2x64, nine common configurations  
are preset for Quick Setup. These include:  
Synchronous dial operation for 56, 64, 112, and 128 kbps  
Asynchronous dial operation for 57.6 and 15.2 kbps  
64 kbps Limited Distance Modem using Master clocking  
64 kbps leased service  
Fallback 57.6  
If indicated with an asterisk, the option requires the end user to configure  
the ISDN switch type, SPID1-LDN1 and SPID2-LDN2. See the section  
Setting the Dial Options.  
Dial 56K sync*  
When the ISU 2x64 is configured for Dial 56 Sync service, the fol-  
lowing parameters are automatically preset:  
Service type ............................................................ISDN dial line  
Automatic answering.......................................................Enabled  
ISDN call type...........................................................56 kbps data  
Data protocol..........................................................Clear Channel  
DTE mode.................................................................Synchronous  
DTE connector bit rate......................................................56 kbps  
DTE flow control ................................................................... none  
RTS line .........................................................................1 mS delay  
CTS line.......................................................................... Forced on  
Transmit data clock....................................Normal clock source  
V.54 Loopbacks.............................................................. Accepted  
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Chapter 8. Quick Setup  
Dial 64K sync*  
When the ISU 2x64 is configured for Dial 64K sync service, the fol-  
lowing parameters are automatically preset:  
Service type ............................................................ ISDN dial line  
Automatic answering ......................................................Enabled  
ISDN call type...........................................................64 kbps data  
Data protocol..........................................................Clear Channel  
DTE mode................................................................. Synchronous  
DTE connector bit rate......................................................64 kbps  
DTE flow control ................................................................... none  
RTS line.........................................................................1 mS delay  
CTS line...........................................................................Forced on  
Transmit data clock....................................Normal clock source  
V.54 Loopbacks...............................................................Accepted  
Dial 112K sync*  
When the ISU 2x64 is configured for Dial 112K sync service, the  
following parameters are automatically preset:  
Service type ............................................................ ISDN dial line  
Automatic answering ......................................................Enabled  
ISDN call type...........................................................56 kbps data  
Data protocol................................................. BONDING mode 1  
DTE mode................................................................. Synchronous  
DTE connector bit rate....................................................112 kbps  
DTE flow control ................................................................... none  
RTS line.........................................................................1 mS delay  
CTS line..........................................................................Forced On  
Transmit data clock....................................Internal clock source  
BONDING timer TXINIT........................................... 10 seconds  
BONDING timer TXFA.............................................. 10 seconds  
BONDING timer TXADD01...................................... 50 seconds  
BONDING timer TXDEQ........................................... 50 seconds  
BONDING timer TANULL........................................ 10 seconds  
BONDING timer TCID................................................. 5 seconds  
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Chapter 8. Quick Setup  
Dial 128K sync*  
When the ISU 2x64 is configured for Dial 128K sync service, the  
following parameters are automatically preset:  
Service type ............................................................ISDN dial line  
Automatic answering.......................................................Enabled  
ISDN call type...........................................................64 kbps data  
Data protocol................................................. BONDING mode 1  
DTE mode.................................................................Synchronous  
DTE connector bit rate....................................................128 kbps  
DTE flow control .................................................................. none  
RTS line .........................................................................1 mS delay  
CTS line..........................................................................Forced On  
Transmit data clock................................... Internal clock source  
BONDING timer TXINIT........................................... 10 seconds  
BONDING timer TXFA .............................................. 10 seconds  
BONDING timer TXADD01 ...................................... 50 seconds  
BONDING timer TXDEQ........................................... 50 seconds  
BONDING timer TANULL........................................ 10 seconds  
BONDING timer TCID................................................. 5 seconds  
Dial 57.6 asyn*  
When the ISU 2x64 is configured for Dial 57.6 asyn service, the fol-  
lowing parameters are automatically preset.  
Service type ........................................................... ISDN Dial line  
ISDN call type...........................................................64 kbps data  
Data Protocol......................................................................... V.120  
DTE mode.............................................................. Asynchronous  
Data Bits......................................................................................... 8  
Parity Bits................................................................................ none  
Stop Bits ......................................................................................... 1  
DTE connector bit rate...................................................57.6 kbps  
DTE flow control ................................................................... none  
RTS line .........................................................................1 mS delay  
CTS line..........................................................................Forced On  
Dialing Mode .......................................................AT Commands  
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Chapter 8. Quick Setup  
Dial 115.2 asyn*  
When the ISU 2x64 is configured for Dial 115.2 asyn service, the  
following parameters are automatically preset:  
Service type ............................................................ ISDN dial line  
ISDN call type...........................................................64 kbps data  
Protocol.......................................................... BONDING mode 1  
DTE mode.............................................................. Asynchronous  
Data Bits......................................................................................... 8  
Parity Bits ................................................................................none  
Stop Bits ......................................................................................... 1  
DTE connector bit rate.................................................115.2 kbps  
DTE flow control ....................................................................none  
RTS line.........................................................................1 mS delay  
CTS line..........................................................................Forced On  
Dialing Mode ....................................................... AT Commands  
Fallback 57.6k*  
When the ISU 2x64 is configured for FALLBACK 57.6K service,  
the following parameters are automatically set:  
Service type ...................................................................... Dial line  
Automatic answering ..............................................................Yes  
ISDN type..................................................................64 kbps data  
Data protocol.....................................................................Fallback  
DTE mode.............................................................. Asynchronous  
Data bits......................................................................................... 8  
Parity bits.................................................................................none  
Stop bits ......................................................................................... 1  
DTE connector rate.........................................................57.6 kbps  
DTE flow control .......................................................... Hardware  
RTS line.........................................................................1 mS delay  
CTS line...................................................................... Follows RTS  
Dialing Mode ....................................................... AT Commands  
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Chapter 8. Quick Setup  
Leased 64K  
When the ISU 2x64 is configured for Leased 64K service, the fol-  
lowing parameters are automatically preset:  
Service type ................................................................Leased Line  
Network clock source ...........................................................Slave  
Channel rate ............................................................................. 64K  
Data Protocol..........................................................Clear Channel  
DDS loopbacks enabled...........................................................Yes  
DTE mode.................................................................Synchronous  
DTE connector bit rate......................................................64 kbps  
DTE flow control ................................................................... none  
RTS line .........................................................................1 mS delay  
CTS line..........................................................................Forced On  
Transmit data clock....................................Normal clock source  
Ldm 64K Master  
When the ISU 2x64 is configured for a point-to-point application,  
such as a Limited Distance Modem arrangement, the Ldm 64K  
Master option automatically presets the following parameters:  
Service type ................................................................Leased Line  
Network clock source ........................................................Master  
Channel rate ............................................................................. 64K  
Data Protocol..........................................................Clear Channel  
DDS loopbacks enabled...........................................................Yes  
DTE mode.................................................................Synchronous  
DTE connector bit rate......................................................64 kbps  
DTE flow control ................................................................... none  
RTS line .........................................................................1 mS delay  
CTS line..........................................................................Forced On  
Transmit data clock....................................Normal clock source  
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Chapter 8. Quick Setup  
Factory Setup  
To restore the ISU 2x64 to the factory default setup, power the unit  
off and perform the following steps:  
1. While pressing 0, power the unit on.  
2. Continue pressing 0 until the front panel displays the top of  
the menu tree. 1=STATUS will be blinking.  
Factory default erases all stored phone numbers, SPIDs, and  
LDNs, and sets parameters as follows:  
Service type ............................................................ ISDN dial line  
ISDN switch type .......................................................AT&T 5ESS  
ISDN call type...........................................................64 kbps data  
Dialing Mode ..............................................................Front Panel  
Data protocol..........................................................Clear Channel  
DTE connector bit rate......................................................64 kbps  
DTE flow control ................................................................... none  
RTS line......................................................................... 1 ms delay  
CTS line........................................................................Forced CTS  
CD line ................................................................................Normal  
DSR line ..........................................................................Forced on  
Transmit Data Clock..................................Normal clock source  
BONDING timer TXINIT........................................... 10 seconds  
BONDING timer TXFA.............................................. 10 seconds  
BONDING timer TXADD01...................................... 10 seconds  
BONDING timer TXDEQ........................................... 50 seconds  
BONDING timer TANULL........................................ 50 seconds  
BONDING timer TXID................................................. 5 seconds  
AT Command Escape character.................................................+  
AT Command End-of-Line character value........................... 13  
AT Command Line Feed character value............................... 10  
AT Command Backspace character value................................ 8  
RS-366 Dialing Default ...................................5 seconds or EON  
Automatic Answering .....................................................Enabled  
AT Command Guard time.............................................1 second  
AT Command Miscellaneous Bits (S register 14) .................. 10  
AT Command MSG Bits (S register 22)................................... 16  
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Chapter 9  
Security and Remote Configuration  
SECURITY  
The ISU 2x64 provides a front panel keypad locking feature to pre-  
vent tampering with configuration settings. The feature requires  
a password to access menus below the top Current-Status menu  
level. The menu options are shown in Figure 9-1.  
1=Netw. options  
2=DTE options  
3=CONFIG  
3=Protocol  
4=Quick setup  
5=Security  
1=Set Password  
2=Lock Keypad  
Password <  
>
6=Remote Config  
Password Required  
Figure 9-1  
Security Menu Tree  
When the front panel keypad is locked, only the top menu is avail-  
able on the LCD display. The LCD can be toggled between DTE1  
and DTE2 current status displays with the cursor keys. Any key  
other than a cursor key prompts the user for a password. If the en-  
tered password matches the stored password, the LCD displays a  
brief message indicating that the front panel is active and the con-  
figuration menus will be displayed as normal. After configura-  
tion is complete, the users must re-enable front panel locking by  
selecting 2=Lock Keypad in the Security menu. If the entered  
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Chapter 9. Security and Remote Configuration  
password does not match the stored password, the LCD displays  
a brief message indicating that the entered password was invalid  
and the top menu is displayed.  
Set Password  
Lock Keypad  
Set Password prompts the user to enter a numeric code that will  
be required for access to configuration menus from the front pan-  
el. The code can be up to six digits long. The default state is noth-  
ing entered in the password option.  
Lock Keypad locks the front panel keypad and displays a brief  
message on the LCD indicating that the front panel is locked. The  
top menu is displayed after the message.  
REMOTE CONFIG  
Remote Config (configuration) allows an ISU to be configured or  
tested over the ISDN line. A special call is made that places the an-  
swer unit in remote loopback for configuration or testing. The  
menu options are shown in Figure 9-2.  
1=Netw. options  
2=DTE options  
3=CONFIG  
1=Number <  
1=Cfg. Rmt. Unit 2=Password <  
2=Set Password Password <  
>
>
3=Protocol  
>
4=Quick setup  
5=Security  
3=Lpbk remote 1B Number <  
4=Lpbk remote 2B Number <  
>
6=Remote Config  
>
Figure 9-2  
Remote Config Menu Tree  
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Chapter 9. Security and Remote Configuration  
Cfg. Rmt. Unit  
Cfg. Rmt. Unit causes the ISU 2x64 to place a call to a remote ISU  
for configuration. The user is prompted for the number to dial  
and the password for accessing the remote unit. After the call is  
placed, the local unit sends the entered password to the remote  
unit. If the password is correct, the remote unit confirms the pass-  
word and configuration is allowed. If the remote unit has no pass-  
word defined, press Enter at the prompt.  
Set Password  
Set Password prompts the user to enter a six digit numeric code  
that musts be supplied when a remote configuration call is re-  
ceived. This password is the same as the password for front panel  
keypad locking. The default state is nothing entered in the pass-  
word option.  
Lpbk remote 1B  
Lpbk remote 1B causes the ISU 2x64 to make a call to a remote ISU  
and place the remote ISU into a 1B-channel loopback. When the  
remoted unit is looped back, the local unit will send a test pattern  
(2047) to the remote unit and verify that the test pattern comes  
back uncorrupted. The user is prompted for the number to dial.  
Negotiation progress is displayed while the loopback call is in  
progress. Total bytes and Error bytes are displayed upon connec-  
tion success. The Cancel key disconnects the call at any time.  
Lpbk remote 2B  
Lpbk remote 2B causes the ISU 2x64 to make a call to a remote ISU  
and place the remote ISU into a 2B-channel loopback. When the  
remoted unit is looped back, the local unit will send a test pattern  
(2047) to the remote unit and verify that the test pattern comes  
back uncorrupted. The user is prompted for the number to dial.  
Negotiation progress is displayed while the loopback call is in  
progress. Total bytes and Error bytes are displayed upon connec-  
tion success. The Cancel key disconnects the call at any time.  
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Chapter 10  
Troubleshooting  
When the ISU 2x64 powers up, it performs an internal self test that  
takes approximately 10 seconds. At the end of the test, the front  
panel momentarily displays Self Test Passed.  
If Self Test Fails  
If Self Test Passed is not displayed, the following steps will verify  
whether or not the problem can be fixed locally:  
1. Ensure the ISU 2x64 is receiving power.  
2. Turn off the ISU 2x64 while holding down 0, then power back  
on.  
3. Continue to press down 0 for 15 seconds. This resets all the  
internal settings to factory defaults.  
4. If the ISU 2x64 still does not pass self test, call ADTRAN  
Technical Support for assistance; see the back of this manual  
for phone numbers.  
If The ISU 2x64 Does Not Read Ready  
When the ISU 2x64 has been set up and connected to a line, but the  
front panel does not read Ready after a few minutes, use the fol-  
lowing troubleshooting procedure:  
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Chapter 10. Troubleshooting  
If the Euro ISDN or VN4 switch type is selected, the unit will not enter  
the Ready state until a setup message is sent or received (part number  
1200051L5 and 1200051L6).  
1. Cycle power on the ISU 2x64, leaving it off for a minimum of  
2 seconds. Turn the power on for one full minute to ensure  
the unit does not read Ready.  
2. Disconnect the ISDN line from ISU 2x64. From a functioning  
voice phone, call the local directory number(s) provided with  
the line. Calling a good ISDN line with nothing connected  
usually results in a ring or fast busy tone. If someone an-  
swers or you get a not-in-service intercept, there is probably  
something wrong with the translation of the line. The phone  
service provider should be able to help.  
3. If the ISU 2x64 continues to display Link Down, there is a  
physical problem with the phone line (more than likely, a  
problem with the layer 1 setup). The problem is in one or  
more of the following places:  
The ISU 2x64 software setup  
The ISU 2x64 hardware  
The wiring on your premises  
The telephone service provider’s wiring  
The telephone service provider’s hardware  
The telephone service provider’s software setup  
To isolate the problem, perform the following procedure:  
A. Ensure the ISDN line is plugged into the ISU 2x64 con-  
nector marked ISDN IFC on the back of the ISU 2x64.  
B. Ensure the ISU 2x64 is configured for dial line service.  
C. Try another piece of functioning ISDN equipment on  
the line.  
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D. Talk to the service provider and ensure you have an  
ISDN Basic Rate U-Interface with 2B1Q line coding  
(wrong options are an S or T interface or AMI line cod-  
ing) when using ISU 2x64 part number 1200051L1 or  
1200051L3. If your ISDN line is extended from a PBX  
with an S/T line card, make sure you are using ISU 2x64  
part number 1200051L2, 1200051L4, 1200051L5, or  
1200051L6.  
E. Ensure that the phone line is connected to the actual  
telephone line or PBX provided by your telephone com-  
pany. If using ISU 2x64 part number 1200051L1 or  
1200051L3 with the U-interface, make sure your line is  
not connected through another piece of equipment such  
as an NT1 in a wiring closet somewhere.  
F.  
Ensure nothing else is bridged across the ISDN line  
pair.  
G. With a minimum of extra wiring, try connecting to the  
ISDN line pair at the point where service provider’s  
wiring ends.  
H. With the ISU 2x64 connected to the ISDN line and pow-  
ered up, talk to your service provider’s repair group  
and inform them that your ISDN basic rate line has a  
physical layer 1 problem. Ask them to check the line. If  
using the ISU 2x64 1200051L1 or 1200051L3 with the U-  
interface, tell them that you have an NT1-like device at  
the end of the ISDN line.  
4. If the ISU 2x64 continuously reads Getting TEI #1, the ISU  
2x64 is physically connected to the local telephone service  
provider but is unable to establish logical layer 2. The prob-  
lem is in one or more of the following places:  
The ISU 2x64 software setup  
The telephone service provider’s software setup  
Hardware configuration, if the line is extended from the  
switch  
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Chapter 10. Troubleshooting  
To isolate the problem, use the following procedure:  
A. Ensure the ISU 2x64 is set up for the correct switch type.  
B. Ensure the quality of the line is satisfactory by checking  
for near- and far-end block errors (NEBEs and FEBEs).  
If the counts are non-zero, there may be a physical link  
problem as described under Link Down (Step 3).  
C. Try another piece of functioning ISDN equipment on  
the ISDN line.  
D. With the ISU 2x64 connected to the ISDN line and pow-  
ered up, talk to the service provider’s repair group and  
tell them you have an ISDN basic rate line that appears  
physically okay but has no terminal endpoint identifier  
(TEI). Ask them to check the line translation and ensure  
that the line supports dynamic TEI allocation. If using  
the ISU 2x64 part number 1200051L1 or 1200051L3 with  
the U-interface, tell them that you have an NT1 and ter-  
minal adapter device connected to the line.  
5. If the ISU 2x64 continuously reads Register SPID #1,the ISU  
2x64 is physically connected to the local telephone service  
provider and has established logical layer 2. The ISU 2x64 is  
unable to establish layer 3. The problem is in one or both of  
the following places:  
The ISU 2x64 software setup  
The telephone service provider’s software setup  
To isolate the problem, perform the following procedure:  
A. Ensure the ISU 2x64 is set up for the correct switch type.  
B. Ensure the ISDN line is multipoint.  
C. Ensure that the ISU 2x64 is set up with the correct  
SPIDs and LDNs.  
D. Try another piece of functioning ISDN equipment on  
the ISDN line.  
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Chapter 10. Troubleshooting  
E. With the ISU 2x64 connected to the ISDN line and pow-  
ered up, talk to the service provider’s repair group and  
tell them you have an ISDN basic rate line that appears  
physically okay but is unable to register its SPID(s).  
Ask them to check the line translation, ensure that the  
ISDN line supports dynamic TEI allocation, and verify  
the SPID(s). If using the ISU 2x64 part number  
1200051L1 or 1200051L3 with the U-interface, tell them  
that you have an NT1 and terminal adapter device con-  
nected to the line.  
6. If the ISU 2x64 continuously reads Getting TEI #2, the ISU  
2x64 has completely initialized the first phone number but is  
unable to establish logical layer 2 for the second phone num-  
ber. The problem is in one or both of the following places:  
The ISU 2x64 software setup  
The telephone service provider’s software setup  
To isolate the problem, perform the following procedure:  
A. Ensure the ISDN line is multipoint with two phone  
numbers.  
B. Ensure that the ISU 2x64 is set up with the correct SPIDs  
and LDNs.  
C. Try swapping SPID1 with SPID2 and LDN1 with  
LDN2. Determine if the problem is the second phone  
number or the quantity of phone numbers.  
D. Try another piece of functioning ISDN equipment on  
the ISDN line.  
E. With the ISU 2x64 connected to the ISDN line and pow-  
ered up, talk to the service provider’s repair group and tell  
them you have an ISDN basic rate line that appears phys-  
ically okay but has no terminal endpoint identifier (TEI).  
Ask them to check the line translation and ensure that the  
ISDN line supports dynamic TEI allocation. If using the  
ISU 2x64 part number 1200051L1 or 1200051L3 with the U-  
interface, tell them that you have an NT1 and terminal  
adapter device connected to the line.  
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Chapter 10. Troubleshooting  
7. If the ISU 2x64 continuously reads Register SPID #2,the ISU  
2x64 has completely initialized the first phone number but is  
unable to establish logical layer 3 for the second phone num-  
ber. The problem is in one or more of the following places:  
The ISU 2x64 software setup  
The telephone service provider’s software setup  
To isolate the problem, perform the following procedure:  
A. Ensure the ISDN line is multipoint with two phone  
numbers.  
B. Ensure that the ISU 2x64 is set up with the correct SPIDs  
and LDNs.  
C. Try swapping SPID1 with SPID2 and LDN1 with  
LDN2. Determine if the problem is the second phone  
number or the quantity of phone numbers.  
D. Try another piece of functioning ISDN equipment on  
the ISDN line.  
E. With the ISU 2x64 connected to the ISDN line and pow-  
ered up, talk to the service provider’s repair group and  
tell them you have an ISDN basic rate line that appears  
physically okay but is unable to register its SPID(s).  
Ask them to check the line translation, ensure that the  
ISDN line supports dynamic TEI allocation, and verify  
the SPID(s). If using the ISU 2x64 part number  
1200051L1 or 1200051L3 with the U-interface, tell them  
that you have an NT1 and terminal adapter device con-  
nected to the line.  
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Chapter 10. Troubleshooting  
If the Wrong DTE Port Answers a Call  
A common mistake that can easily be made is entering the SPID/  
LDN pair swapped between the two DTE ports. For example,  
your telephone company has given you two SPID/LDN numbers  
as follows:  
SPID1 - 201555701111 LDN1 - 5557011  
SPID2 - 201555702222 LDN2 - 5557022  
If you were to enter the pairs for DTE#1 as SPID1/LDN2 and  
SPID2/LDN1, the ISU 2x64 would get confused during incoming  
calls because the SPID/LDN pair does not match. Be sure to enter  
the SPID/LDN pairs for each DTE# as follows:  
Enter SPID dte1  
201555701111  
Enter LDN dte1  
5557011  
Enter SPID dte2  
201555702222  
Enter LDN dte2  
5557022  
Proper entry of the SPID/LDN pair is crucial to proper operation of the  
ISU 2x64.  
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Chapter 10. Troubleshooting  
If you Cannot Connect Calls  
See Table 10-A for corrective actions if you cannot place calls.  
Table 10-A  
Troubleshooting Calls  
Condition  
Corrective Action  
The ISU 2x64 reads Ready but  
calls cannot be placed.  
There is most likely a problem in the software setup (trans-  
lation) at the CO switch or the network setup in the ISU  
2x64.  
Local voice calls can be transmit-  
ted, but data calls to the same  
exchange cannot.  
The ISDN line is probably not set up to support data  
calls.  
Local data calls go through, but  
long distance data calls do not.  
Ensure the far end is working. If not already doing so,  
place the call explicitly specifying the prefix of the long  
distance service (for example, 10288 for AT&T). If this  
does not work, then most likely the problem is the long  
distance service provider. Another possibility is that the  
local service provider is not providing long distance  
access.  
Data calls can be made, but  
BONDED data calls cannot.  
There is most likely a problem in the software setup (trans-  
lation) at the CO switch or the network setup in the ISU  
2x64.  
Another possibility is that the data circuits provided are  
not good enough to support the BONDING negotiation  
process.  
If the line has two phone numbers, make sure the second  
SPID and LDN are entered correctly in SPID2 and LDN2  
in the ISU 2x64.  
Check with the local service provider to ensure that the  
line supports two data calls. The ISU 2x64 status log  
buffer shows the sequence of events that occurred. You  
need to know which piece of equipment first caused the  
BONDING process to terminate. The status logs from  
both ends may be necessary to determine this.  
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Chapter 11  
Specifications  
Network Interface  
RJ-45 for ISDN Basic Rate U-Interface, part numbers  
1200051L1 and 1200051L3  
RJ-45 for ISDN Basic Rate S/T Interface, part numbers  
1200051L2, 1200051L4, 1200051L5, and 1200051L6.  
DTE Interface  
Two DB-25s, each RS-530/EIA-232 interfaces (V.35 interfaces  
available with RS-530-to-V.35 adapters, part number  
1200072L1)  
Dialing Selections  
In-band DTE Dialing: V.25 bis or AT commands  
Dial Interfaces: Two RS-366 interfaces (DB-25s)  
Manual or automatic stored number dialing, DTR Assertion  
Front panel manual dialing  
Data Rates (Network)  
64 kbps (1 B channel), 128 kbps (2 B channels)  
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Chapter 11. Specifications  
Data Rates (DTE)  
When using single DTE interface:  
300 bps to 115.2 kbps asynchronous  
2400 bps to 128 kbps synchronous  
When using dual DTE interfaces:  
300 bps to 57.6 kbps asynchronous on each interface  
2400 bps to 64 kbps synchronous on each interface  
B Channel Aggregation  
BONDING Protocol Mode 1. Used for speeds over 64 kbps  
from a single DTE interface.  
RFC 1717 Multilink PPP used for speeds over 57.6 kbps for a  
single DTE interface.  
Rate Adaptation  
T-Link  
CCITT V.120  
CCITT V.110  
Clear Channel  
SAP  
FALLBACK  
DSU 57.6 Async  
BONDING mode 1  
PPP Async-Sync  
Multilink PPP  
Interoperability  
BONDING Mode 1-compatible Inverse Multiplexers (AS-  
CEND, PROMPTUS, Teleos, etc.)  
Switched-56 DSUs (2-wire and 4-wire), ISU 128s, ISDN TAs  
PPP/Multilink compatible devices  
Switch Compatibility  
AT&T 5ESS, NTI DMS-100, National ISDN-1, NEC, Euro IS-  
DN*, TDX10*, TDX1B*, KDD*, NTT*, and VN4*.  
*Only available on part numbers 1200051L5 and 1200051L6.  
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Chapter 11. Specifications  
Display  
Two-line by 16-character LCD  
LED Indicators:  
RS  
Request to Send  
Indicates the DTE is ready to transmit.  
CS Clear to Send  
Indicates the ISU 2x64 is ready to transmit.  
TD Transmit Data  
On when the DTE is transmitting to the ISU 2x64  
RD Receive Data  
On when the ISU 2x64 is receiving data from thefar-end  
CD Carrier Detect  
On when the ISU 2x64 is ready to transmit data  
TR Data Terminal Ready from DTE  
On when DTR is active at the DTE interface  
SR  
Data Set Ready  
Environmental  
Operating Temperature: 0 to 50 ˚C  
Storage Temperature:-20 to 70 ˚C  
Relative Humidity:Up to 95%, non-condensing  
Physical  
2.25" high x 8.75" wide x 11.00" deep, 3 lbs  
Power  
115 VAC, 60 Hz, 8 W maximum dissipation (part numbers  
1200051L1, 1200051L2, and 1200051L5 )  
220 VAC, 50 Hz, 10 W maximum dissipation (part numbers  
1200051L3 and 1200051L4)  
230 VAC, 50Hz, 10 W maximum dissipation (part number  
1200051L6)  
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Appendix A  
AT Commands  
This Appendix lists the supported AT commands and descrip-  
tions of their functions. Bold text indicates default settings.  
Command  
Function  
A
Answer. Puts the ISU 2x64 in answer mode.  
D
Dial. Precedes the telephone access number [ATD5551212].  
Hang up. Disconnects the current call.  
On line. Commands the unit to go back on line.  
S Register.  
H
O
S
SS  
Z
S String register.  
Reset. Resets the AT command processor.  
Save. Save current configuration to EEPROM.  
&W  
+++  
Break in. Break in AT command processor during an active call. The  
break in character can be defined in S2.  
_U  
!S  
Reset ISDN interface.  
Dump Status Buffer contents to the DTE port.  
Power resets unit.  
_Z  
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Appendix A: AT Commands  
Command  
Function  
Carrier Detect (CD) Control Line Options  
&C0  
&C1  
&C2  
&C3  
CD forced On  
CD normal  
CD off with local disconnect (LOCD)  
CD off with Link Down  
Data Terminal Ready (DTR) Control Line Options  
&D0  
&D1  
&D2  
Ignore DTR  
DTR Off forces command  
Idle when Off, DTR Off forces idle (On allows auto answer)  
Generic Unit Configurations  
&F0  
&F1  
&F2  
&F3  
&F4  
&F5  
&F6  
&F7  
&F8  
&F11  
Resets all S-registers to factory preset values  
Configures unit for Dial 56k sync  
Configures unit for Dial 64k sync  
Configures unit for Dial 112k sync  
Configures unit for Dial 128k sync  
Configures unit for Leased 64k  
Configures unit for Ldm 64k master  
Configures unit for Dial 57.6k async  
Configures unit for Dial 115.2k async  
Configures unit for FALLBACK 57.6k async  
Network Options  
&L0  
&L1  
Dial network  
Leased network  
Calling Number Identification  
&N0  
&N1  
Number 1. Read far-end phone number 1 if service subscribed from  
telephone company.  
Number 2. Read far-end phone number 2 if service subscribed from  
telephone company.  
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Appendix A: AT Commands  
Command  
Function  
DTE Data Type Options  
&Q0  
&Q1  
DTE is async  
DTE is sync  
Clear-To-Send (CTS) Control Line Options  
&R0  
&R1  
Follows RTS  
Forced CTS  
Data Set Ready (DSR) Control Line Options  
&S0  
&S1  
&S2  
DSR forced On  
DSR if call up  
DSR if link up  
DTE Connector Data Synchronous Data Clocking Options  
&X0  
&X1  
Internal transmit clock  
External transmit clock  
Assigning Stored Numbers for Dialing Options  
&Z0  
&Z1  
&Z2  
&Z3  
&Z4  
&Z5  
&Z6  
&Z7  
&Z8  
&Z9  
Stored number 0  
Stored number 1  
Stored number 2  
Stored number 3  
Stored number 4  
Stored number 5  
Stored number 6  
Stored number 7  
Stored number 8  
Stored number 9  
Local Echo Options  
E0  
E1  
Disable local echo  
Enable local echo  
Unit Identification  
I0  
I1  
Identify unit. Commands the unit to display model number.  
Identify software. Commands the unit to display software version.  
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Appendix A: AT Commands  
Command  
Function  
AT Command Response Message Options  
Q0  
Response messages on  
Q1  
Response messages off  
AT Command Response Message Types  
V0  
V1  
Response messages codes  
Response messages words  
AT Command Connect Message Options  
X0  
X1-7  
Simple connect message  
Connect messages with bit rate  
Ready-To-Send (RTS) Control Line Options  
_D0  
1 mS delay  
_D1  
18 mS delay  
MakeBusy Options  
_B0  
Make DTE port not busy (same as S135=0).  
_B1  
Make DTE port busy (same as S135=1).  
Service Profile Identification (SPID) Access Options  
_I0=  
_I1=  
Access SPID#1 for DTE #1  
Access SPID#2 for DTE #2  
Local Directory Number (LDN) Access Options  
_N0=  
_N1=  
Access LDN1 for DTE #1  
Access LDN2 for DTE #2  
ISDN Switch Type Options  
_S0  
_S1  
_S2  
_S3  
_S4  
_S5  
5ESS  
DMS-100  
National ISDN-1  
NEC  
Euro ISDN*  
VN4*  
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Appendix A: AT Commands  
Command  
Function  
ISDN Switch Type Options (continued)  
_S6  
_S7  
_S8  
_S9  
TDX10*  
TDX1B*  
KDD*  
NTT*  
*Only available on part numbers 1200051L5 and 1200051L6.  
ISDN U-Interface Operational Mode Options  
_X0  
ISU timing slaves to network (NT mode)  
_X1  
ISU is U-interface timing master (LT mode)  
Data Flow Control Options  
\Q0  
\Q1  
\Q2  
\Q3  
No flow control  
Software  
CTS only  
Hardware  
Dump Status Buffer  
!S  
Sends complete log of all messages stored in the StatusBuffer.  
VT 100 Terminal Menus  
!V  
Enables VT 100 compatible menuing system via the DTE connector.  
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Appendix A: AT Commands  
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Appendix B  
Current Status Messages  
This appendix lists the status line messages and their definitions.  
Messages shown entirely in capital letters are generated by the  
ISDN network. Messages with lower case letters are generated by  
the ISU 2x64.  
AT&T-5ESS Ready  
The ISU is connected to an AT&T-5ESS switch and is ready to  
place/receive calls.  
Call Connect B1  
Bearer channel 1 is connected and is active.  
Call Connect B2  
Bearer channel 2 is connected and is active.  
CALL xxxxxxx  
The ISU is calling phone number xxxxxxx.  
DEACTIVATED  
The network interface is not active.  
DISCONNECTED  
The network has activated layer 1 but layer 2 is inactive. To acti-  
vate the unit a setup message must be sent or received.  
DISCONNECTING  
The current phone call is being disconnected (hung up).  
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Appendix B: Current Status Messages  
DMS-100 Ready  
The ISU is connected to a DMS-100 switch and is ready to place/  
receive calls.  
Euro ISDN Ready  
The ISU 2x64 is connected to a Euro ISDN switch and is ready to  
place/receive calls.  
Getting TEI #1  
The ISU is receiving its first TEI from the network.  
Getting TEI #2  
The ISU is receiving its second TEI from the network.  
ISDN-1 Ready  
The ISU is connected to an ISDN-1 compliant switch and is ready  
to place/receive calls.  
Link down  
The network interface is not active.  
Link In Sync  
The ISU has successfully connected to the network but is waiting  
for the switch to issue the ACT bit.  
LPBK DTE  
The DTE connector is looped back in the DTE direction.  
LPBK Netw  
The ISU 2x64 is in a customer initiated loopback.  
LPBK Protcl.Net  
The ISU 2x64 has been commanded to perform a loopback in the  
network direction after letting the incoming data pass through the  
current protocol.  
NEC Ready  
The ISU 2x64 is connected to an NEC switch and is ready to place/  
receive calls.  
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Appendix B: Current Status Messages  
NET EOC LOOPBACK  
The ISU 2x64 has been commanded to perform an ISDN loopback  
toward the network.  
NET REM LOOPBACK  
The ISU 2x64 is performing a V.54 or DDS latching loopback to-  
ward the network.  
Ready  
The unit is ready to make or accept a call.  
Register SPID #1  
The ISU 2x64 is registering its first SPID with the network.  
Register SPID #2  
The ISU 2x64 is registering its second SPID with the network.  
RINGING  
The phone number just dialed is ringing.  
xxxx nnnn  
A rate adaptation is running at the bit rate specified by nnnn.  
xxxxx Quitting  
A rate adaptation protocol is turning off.  
xxxxx Ready  
A rate adaptation protocol is ready.  
xxxxx Setup  
A rate adaptation protocol is setting up.  
xxxxx can be any of the following:  
BONDING  
Bandwidth on Demand Interoperability Users Group protocol.  
CLEAR CHAN  
No rate adaptation protocol (allows use of maximum bandwidth).  
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Appendix B: Current Status Messages  
DSTOP  
DSU 57.6 Async rate adaptation protocol.  
DSU57.6  
ADTRAN DSU asynchronous protocol.  
FALLBACK  
FALLBACK rate adaptation protocol.  
SAP  
Simple Adtran Protocol.  
TLINK  
TLINK rate adaptation protocol.  
V120  
V.120 rate adaptation protocol.  
V110  
V.110 rate adaptation protocol.  
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Appendix C  
Status Buffer Messages  
Messages shown entirely in capital letters are generated by the  
ISDN network. Messages with lower case letters are generated by  
the ISU 2x64.  
Answer 1/2  
The ISU answered a call on either the first or second B channel.  
The calling phone number is displayed if available.  
ACCESS_INFO_DISCARDED  
The network was unable to deliver access information to the far-  
end.  
Back to online  
ISU 2x64 went back on line.  
Bad async BPS  
The BONDING protocol determined that the selected asynchro-  
nous bit rate is not supported.  
Bad AT bit field  
User issued an AT command with an argument that was out of  
range.  
Bad B channel  
Bonding negotiation determined the delay in one of the Bearer  
channels was uncorrectable.  
Bad call type  
ISU 2x64 placed a call with an improper call type.  
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Appendix C: Status Buffer Messages  
Bad DTE baud  
The DTE bit rate does not match a valid bit rate for the protocol se-  
lected.  
Bad DTE bps  
Bonding negotiation determined the chosen DTE bit rate is in-  
valid.  
BAD_INFO_ELEM  
Call control error.  
Bad phone number  
ISU 2x64 attempted to call an invalid phone number.  
Bad TLK Version  
Invalid TLINK parameters found during end-to-end negotiations.  
Baud Rate  
ISU 2x64 does not support the negotiated TLINK baud rate.  
BEAR_CAP_NOT_AVAIL  
The bearer channel requested by the user is not available.  
Bearer mode  
Incoming call is not of a type the ISU 2x64 can accept.  
Bearer info mode  
Incoming call information transfer capability is not known.  
BONDING (+/- XXX)  
The amount of bytes of corrected delay between the B2 and B1  
bearer channels (XXX can range from -8000 to +8128 bytes ).  
BPS mismatch  
Bonding negotiation found a bit rate mismatch.  
Break to AT cmd  
User issued a break-in request (+++).  
Break ignored  
User issued an extra break-in request.  
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Appendix C: Status Buffer Messages  
BUSY  
The called number is busy.  
CallID 1 in use  
ISU 2x64 tried to place a call using SPID 1 when SPID 1 was al-  
ready in use.  
CallID 2 in use  
ISU 2x64 tried to place a call using SPID 2 when SPID 2 was al-  
ready in use.  
Call not ringing  
User executed an answer command (ATA) but there was not a call  
present.  
CALL_REJECTED  
The call has been rejected by the ISDN network.  
Can’t go online  
ISU 2x64 cannot go back on line. User issued an unknown AT  
command.  
CAP_NOT_IMPLEMENTED  
The network or far-end does not support the bearer capability re-  
quested.  
CHAN_DOES_NOT_EXIST  
The bearer channel requested is not present.  
CHAN_NOT_IMPLEMENTED  
The bearer channel requested has not been implemented.  
CHANNEL_UNACCEPTABLE  
The channel requested has not been subscribed.  
CID>0 rcvd  
Received an incoming call from a third party during Bonding set-  
up with far end.  
DEST NOT ISDN  
The number called is not ISDN (warning only).  
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Appendix C: Status Buffer Messages  
DEST_OUT_OF_ORDER  
The called number is out of order.  
Dial1/2  
The ISU 2x64 placed a call on either the first or second channel.  
The number called is displayed following the message.  
Discon1/2  
The call on either the first or second channel was disconnected  
from the network. The far-end phone number is displayed if  
available.  
Disconnect Req  
Far-end unit disconnected during BONDING negotiation.  
DPUMP END RCVD  
Indication of a hang-up or disconnect occurring during BOND-  
ING. Does not indicate an error condition has occurred.  
DTE must be SYNC  
For the protocol chosen, the DTE connector must be optioned as  
synchronous.  
DTE not set V25  
The DTE equipment is not optioned for the same bit rate as the ISU  
2x64 for V.25 bis dialing.  
DTR not up  
ISU 2x64 tried to place a call in a dialing mode that requires DTR  
to be in an active state but it is not.  
Dump call  
ISU 2x64 could not accept an incoming call because it was already  
involved in a call.  
Dump1/2  
An incoming call on either the first or second channel was discard-  
ed by the ISU. The calling number is displayed if available.  
FACILITY_NOT_IMPLEMENT  
The network does not support the requested supplementary ser-  
vice.  
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Appendix C: Status Buffer Messages  
FACILITY_REJECTED  
A facility requested cannot be provided by the network.  
FACILITY_NOT_SUBSCRIBED  
The channel type requested has not been subscribed.  
FALLBACK ERROR  
Attempt to fallback to normal mode failed.  
FBW disconnect  
BONDING negotiation has failed due to a disconnect on a B-  
Channel.  
FlowCtl mismatch  
Bonding negotiation determined a flow control mismatch.  
FlowCtl required  
Bonding negotiation determined that flow control needs to be op-  
tioned on.  
Hangup1/2  
The call on either the first or second channel was disconnected by  
the ISU 2x64. The far-end phone number is also displayed.  
InCmptblFound  
TLINK end-to-end negotiations found an optioning incompatibil-  
ity between the two end units.  
INCOMMING_CALL_BARRED  
The network will not allow an incoming call.  
INCOMPATIBLE_DEST  
The called number cannot accept the type of call that has been  
placed.  
INTRWORKING_UNSPEC  
A message was sent by a far-end network that was not under-  
stood.  
INVALID_CALL_REF  
Call control error.  
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Appendix C: Status Buffer Messages  
INVALID_ELEM_CONTENTS  
Call control error.  
INVALID_MSG_UNSPEC  
Invalid message, protocol error.  
INVALID_NUMBER_FORMAT  
The dialed number has an invalid format.  
L1 not up  
Call has been attempted while the network interface is not active.  
L2 not up  
Call has been attempted while the data link layer interface is not  
active.  
L3 not up  
Call has been attempted while the call control interface is not ac-  
tive.  
L2 #2 not up  
Call has been attempted while the data link layer interface for a  
second call (BONDING) is not active.  
L3 #2 not up  
Call has been attempted while the call control layer interface for a  
second call (BONDING) is not active.  
LDN TOO LONG  
The local directory number entered has too many digits.  
MANDATORY_IE_LEN_ERR  
Mandatory information element length error.  
MANDATORY_IE_MISSING  
Mandatory information element missing.  
Need 2 B chan  
The DTE bit rate requires the BONDING protocol.  
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Appendix C: Status Buffer Messages  
Need 64K call  
The BONDING protocol requires the ISU 2x64 to be configured  
for a 64kbps data call type.  
Negotiation fail  
The BONDING negotiation has failed.  
NETWORK BUSY  
The ISDN switch is busy and unable to process a call.  
NETWORK_CONGESTION  
The phone network is currently congested.  
NETWORK_OUT_OF_ORDER  
The phone network is out of order.  
No 48K Support  
The ISU 2x64 does not support 48 kbps TLINK. Local DTE setup  
error.  
NO_CIRCUIT_AVAILABLE  
The requested bearer channel is not available.  
NONEXISTENT_MSG  
Nonexistent message was sent by the ISU 2x64.  
No Sreg number  
Attempt to access an S register without specifying a specific S-reg-  
ister (example: ATS=1).  
No Sreg value  
Attempt to change an S-register without specifying a value (ex-  
ample: ATS2= ).  
NO_ROUTE  
The phone network was unable to find a route to the destination  
number.  
NO_USER_RESPONDING  
The dialed number is not responding.  
NORMAL_CLEARING  
The network is disconnecting the current call.  
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Appendix C: Status Buffer Messages  
NOT end2end ISDN  
The path that the call was routed over is not ISDN from end-to-  
end (warning only).  
NUMBER_CHANGED  
The number dialed has been changed.  
OUTGOING_CALL_BARRED  
The network will not allow the outgoing call to be placed.  
PROTOCOL_ERROR  
Call control error.  
REQ_CHANNEL_NOT_AVAIL  
The channel type requested is currently not available.  
Remote not ISU  
Bonding negotiation determined the far-end unit is not another  
ISU. (Asynchronous rates can only be supported between two  
ADTRAN ISUs when Rev. 0 Bonding Mode 1 is selected. Rev. 1  
Bonding Mode 1 will interoperate with other vendor terminal  
adapters in asynchronous DTE operation.)  
RESP_TO_STAT_ENQ  
Response to status inquiry.  
Ring 1/2  
An incoming call on either the first or second channel entered the  
Ring state. The calling phone number is displayed if available.  
S cmd not = or ?  
User did not use proper syntax.  
SAP idle timeout  
Unit at far-end is not configured to use the SAP protocol.  
SERVICE_NOT_AVAIL  
The requested service is not available.  
SOURCE NOT ISDN  
The incoming calling party is not ISDN (warning only).  
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Appendix C: Status Buffer Messages  
SReg Set Error  
Local DTE invalid S-register setting.  
Sync BPS < 56K  
The synchronous bit rate selected is too slow for the BONDING  
protocol.  
Synch Mismatch  
Both ends bad synchronization.  
TAINIT expired  
Bonding timer TAINIT expired.  
TANULL expired  
Bonding timer TANULL expired, non BONDING equipment at-  
tempted to call into the ISU 2x64 while optioned for BONDING.  
TEMPORARY_FAILURE  
The network has temporarily failed; try the call again.  
TIMER_EXPIRY  
Call control error.  
TLINK ErrorOne  
Catastrophic TLINK error.  
TXADD01 expired  
Bonding timer TXADD01 expired, probably making a long dis-  
tance call to a foreign country; adjust timer value to correct.  
TXFA1 expired  
Bonding timer TXFA1 expired; other vendor's BONDING equip-  
ment did not operate properly.  
TX FLOW ERROR  
Flow control needs to be enabled.  
TXFA2 expired  
Bonding timer TXFA2 expired; other vendors BONDING equip-  
ment did not operate properly.  
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Appendix C: Status Buffer Messages  
TXINIT expired  
Bonding timer TXINIT expired, called non-BONDING equipment  
or B channel not error free.  
UNASSIGNED_NUMBER  
The phone number dialed does not exist.  
Unknown AT & cmd  
User issued an unknown AT command.  
UNSPECIFIED_CAUSE  
Received a cause message from the network that is not under-  
stood.  
Unsupported baud  
The ISU 2x64 does not support the negotiated baud rate.  
USER_BUSY  
The dialed number is busy.  
V120 timeout  
The far end unit is not set up for V.120 or B channel not error free.  
V120 connected  
The V.120 rate adaptation successfully connected to the far-end  
unit.  
WRONG_MESSAGE  
Call control error.  
WRONG_MSG_FOR_STATE  
Call control error.  
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Appendix D  
S-Register List  
Determines how the ISU 2x64 answers an incoming  
call.  
S0.........AUTO ANSWER  
0 = Disable (ISU 2x64 does not answer call)  
1 = Enable (ISU 2x64 answers all calls) (default)  
2 = Dump all calls  
S2.........BREAK IN  
CHARACTER  
Determines which key or character (in ASCII code)  
defines the escape command. The standard escape  
character is a + sign (ASCII value of 43 decimal). To  
change the character set, set S2 to the desired ASCII  
value.  
Range = 0 to 127  
S3.........END OF LINE  
CHARACTER  
Determines which key or character (in ASCII code)  
ends a command line. The standard end-of-line char-  
acter is the carriage return (ASCII value of 13 deci-  
mal).  
Range = 0 to 127  
S4.........LINE FEED  
CHARACTER  
Determines which key or character (in ASCII code)  
advances the cursor to the next line after ending a  
command line or after an ISU 2x64 message. The stan-  
dard character is the line feed (ASCII value of 10 dec-  
imal).  
Range = 0 to 127  
S5.........BACK SPACE  
CHARACTER  
Determines which key moves the cursor back one  
space to erase a character. The standard character is  
the backspace (ASCII value of 8 decimal).  
Range = 0 to 127  
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Appendix D: S-Register List  
S6.........DTR DIAL DELAY  
Delay time in minutes between consecutive outgoing  
calls when DTR is set for Dial #0 if onoption.  
S7.........CONNECT TIME  
Determines how long the ISU 2x64 waits for an out-  
going call to be answered.  
15 = 15 seconds  
30 = 30 seconds (default)  
60 = 1 minute  
120 = 2 minutes  
240 = 4 minutes  
S9.........CLEAR CHAN DELAY The value multiplied by eight determines the number  
of bytes between receive data and transmit data.  
S10.......DISABLE REMOTE  
CONFIG  
Disables the two-second delay at the beginning of  
each incoming call that scans for remote configuration  
data. FALLBACK protocol cannot be used when this option  
is set!  
0 = Remote Config enabled  
1 = Remote Config disabled  
S12.......ESCAPE TIME  
S14.......MISC BITS  
Determines the delay required immediately before  
and after entering the escape command for the ISU  
2x64 to recognize and execute the command.  
Range = 0 to 127 (default = 1 second)  
Miscellaneous bits (bit 8 is most significant bit) .  
Bit 2 = 1:enables on screen echo of AT commands.  
Bit 2 = 0: disables on screen echo of AT commands.  
Bit 3 = 0: enables AT responses from the ISU 2x64.  
Bit 3 = 1: disables AT responses from the ISU 2x64.  
Bit 4 = 1: enables AT responses to be displayed  
in text form.  
Bit 4 = 0: enables AT responses to be displayed in nu-  
meric form.  
S15.........ASYNC BONDING REV Determines the revision level Bonding negotiates  
for asynchronous connections.  
0 = ADTRAN orginal Async. Bonding  
1 = Multivendor Async. Bonding (default)  
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Appendix D: S-Register List  
S22.......MSG BITS  
Miscellaneous message bits (bit 8 is most significant  
bit).  
Bit 5 = bit 6 = bit 7 = 1 allows connect message with  
baud rate.  
Bit 5 = bit 6 = bit 7 = 0 connect message without baud  
rate.  
S23.......MAKE BUSY  
Number assigned by the telephone company when  
FEATURE BUTTON requested by user. Make Busy option is translated for  
NUMBER  
an ISDN line and the feature button number must be  
entered into this S register. Useful for Hunt-Group  
operation.  
Range = 0 to 255  
0 is default.  
S24.......V.120  
Value determines whether or not the V.120 bit is set  
LOW LAYER COMP. in setup messages for CCITT V.120 calls. Some terminal  
adapters require that this bit be set to connect V.120  
calls.  
0 = Set V.120 bit in call setup message (default)  
1 = Do not set V.120 bit in call setup message  
S25.......DTR DELAY  
Value determines the minimum time a change of state  
on DTR must last before the unit responds. The value  
is in hundredths of seconds.  
Range = 0 to 255  
5 is default (50 milliseconds)  
S26.......DTE RATE ADJUST  
S27.......PPP MODE  
Determines CLEAR CHAN protocol automatically re-  
ducing DTE RATE for non-64K call types.  
0 = CLEAR CHAN changes DTE rate from 64K to  
56K for non-64K call types (default).  
1 = CLEAR CHAN does not change DTE rate from  
64K to 56K for non-64K call types.  
Value determines whether PPP will be a single-link or  
multilink connection.  
0 = Single-link operation (default)  
1 = Multi-link operation  
2 = Use compression  
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Appendix D: S-Register List  
S30.......DTE CTS  
Controls the operation of the DTE connector CTS line.  
0 = Follows RTS  
1 = Forced CTS (default)  
S31.......DTE RTS  
S32.......DTE DSR  
Controls operation of the RTS line.  
0 = 1 ms delay (default)  
17 = 18 ms delay  
Controls the operation of the Data Set Ready signal on  
the DTE connectors.  
0 = Force DSR on always (default)  
1 = DSR active only during a call  
2 = DSR active only when network interface is on  
S33.......DTE CD  
Controls the operation of the Carrier Detect line on the  
DTE connectors.  
0 = Force CD on always  
1 = CD is active during a call (default)  
2 = LOCD  
3 = Off Link Down  
S34........DTE DTR  
Determines how the ISU 2x64 responds to changes in  
DTR.  
0 = Ignore DTR (default)  
1 = Force AT command mode when DTR is off  
2 = Dump incoming call when DTR is off  
4 = Hang up incoming call when DTR is off  
8 = Hang up outgoing call when DTR is off  
40 = Dial #0 if on  
60 = Dial/Answer if on  
72 = Off on dial #0  
S35........DTE CONN  
Determines which is the current operating DTE con-  
nector.  
0 = RS-530 connector (default)  
1 = V.35 connector  
2 = EIA-232  
S40.......BOND TXINIT  
Specifies the number of seconds the originating end-  
point attempts to detect the BONDING negotiation  
pattern from the answering endpoint before deter-  
mining the BONDING call has failed.  
0 to 256, 10 sec is default  
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Appendix D: S-Register List  
S41.......BOND TXFA  
Specifies the number of seconds both endpoints at-  
tempt to detect the BONDING frame pattern when a  
call is connected before deciding the BONDING call  
has failed. When operating with other manufacturer's  
BONDING equipment, it may be necessary to length-  
en this timer to match TXADD01.  
0 to 256, 10 sec is default  
S42.......BOND TXADD01  
The number of seconds both endpoints waits for the  
additional call to be connected at the end of negotia-  
tion before determining the BONDING call has failed.  
When dialing overseas it may be necessary to length-  
en this timer to allow for lower call routing.  
0 to 256, 50 sec is default.  
S43.......BOND TXDEQ  
S44 ........BOND TANULL  
The number of seconds both endpoints attempt to  
equalize the network delay between the bearer chan-  
nels before determining the BONDING call has failed.  
0 to 256, 5 sec is default.  
The number of seconds the answering endpoint at-  
tempts to detect the BONDING negotiation pattern  
from the originating endpoint before aborting to clear  
channel mode. It may be necessary to shorten this  
timer if the DTE equipment connected to the ISU 2x64  
also has timer constraints for completing non-BOND-  
ING parameter negotiation.  
0 to 256, 10 sec is default.  
S45.......BOND TCID  
S46.......V25 MODE  
The number of seconds both endpoints attempt to ne-  
gotiate agreeable values for bearer channels and chan-  
nel capacities before determining the BONDING call  
has failed.  
0 to 256, 5 sec is default.  
Selects the type of V.25 bis dialing used.  
0 = Asynchronous V.25  
1 = HDLC V.25  
2 = BISYNC V.25  
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Appendix D: S-Register List  
S47.......RS 366 TIME  
Determines the amount of time the RS-366 port waits  
for either EON or inactivity to terminate a dial string  
before dialing a number.  
0
= Wait for EON only  
10 = Wait for 1 second or EON  
20 = Wait for 2 seconds or EON  
50 = Wait for 5 seconds or EON (default)  
100 = Wait for 10 seconds or EON  
200 = Wait for 20 seconds or EON  
S50.......LINE MODE  
Selects the operating mode of the ISU 2x64.  
0 = Dial service (switched service) (default)  
1 = Leased service (non-switched service)  
S51.......LINE CLOCK  
S52.......SWITCH TYPE  
Selects the clock mode in leased mode.  
0 = Slave (default)  
1 = Master (Leased line only, LDM application only)  
Selects the network switch type for dial service.  
0 = AT&T 5ESS (default)  
1 = Northern Telecom DMS-100  
2 = National ISDN-1  
3 = NEC  
4 = Euro ISDN*  
5 = VN4*  
6 = TDX10*  
7 = TDX1B*  
8 = KDD*  
9 = NTT*  
*Only available on part numbers 1200051L5 and 1200051L6.  
S53.......CALL TYPE  
Call type  
0 = Speech  
1 = Audio  
2 = 56 kbps data  
3 = 64 kbps data (default)  
5 = 128 kbps data  
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Appendix D: S-Register List  
S54.......PROTOCOL  
TYPE  
Rate adaptation protocol type.  
1 = Clear Channel (no rate adaptation) (default)  
2 = BONDING mode 1  
3 = SAP (Simple Asynchronous Protocol)  
4 = T-link  
5 = V.110  
6 = V.120  
9 = DSU 57.6 kpbs asynchronous  
11 = FALLBACK  
12 = PPP  
S55.......DIAL MODE  
S56.......ECHO TONE  
Selects dialing interface.  
0 = Front panel only (dialing from front panel is al-  
ways available) (default)  
1 = RS-366 dialing port  
2 = AT commands  
3 = V.25 bis dialing  
Enables an echo tone which suppresses the echo can-  
cellers in a voice circuit. Can be used to trick the  
switch to allow sending data over a line optioned for  
voice ISDN service.  
0 = None (default)  
1 = Answer  
2 = Originate  
3 = Both  
S57.......DDS TEST  
Allows an ISU 2x64 optioned as a leased line unit to  
respond to either DDS inband latching loopback and/  
or V.54 loopback commands.  
0 = No Rem Lpbks  
1 = DDS Accepted  
2 = V.54 Accepted (default)  
3 = DDS + V.54 Accepted  
S58.......CALL SCREENING  
Allows the ISU 2x64 to screen incoming calls.  
0 = Answer any call (default)  
1 = Answer only calls from numbers matching  
those stored in SN0 through SN9.  
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Appendix D: S-Register List  
S59.......CHANNEL RATE  
Sets the available network bandwidth when the ISU  
2x64 is in leased mode.  
3 = 64 kbps  
5 = 128 kbps  
SS60.....SPID1 LOC  
SS61.....SPID2 LOC  
SS62.....LDN1 LOC  
SS63.....LDN2 LOC  
S70.......DTE MODE  
Primary SPID string location.  
Secondary SPID string location.  
Primary local directory number string location.  
Secondary local directory number string location.  
Selects asynchronous or synchronous mode on the  
DTE connector.  
0 = Asynchronous  
1 = Synchronous (default)  
S71.......DTE RATE  
Selects the DTE connector bit rate.  
1 = 300  
3 = 1200  
6 = 2400  
8 = 4800  
11 = 9600  
15 = 19200  
17 = 38400  
18 = 48000  
19 = 56000  
20 = 57600  
21 = 64000 (default)  
22 = 112000  
23 = 115200  
24 = 128000  
S72.......DATA BITS  
S73.......DTE PARITY  
Selects the number of asynchronous data bits.  
0 = 8 bits (default)  
1 = 7 bits  
Selects the number of asynchronous parity bits.  
0 = None (default)  
1 = Odd  
2 = Even  
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Appendix D: S-Register List  
S74.......DTE STOP  
S75.......DTE FLOW  
Selects the number of asynchronous stop bits. More  
than one option can be set at the same time.  
0 = 1 stop bit (default)  
1 = 1.5 stop bits  
2 = 2 stop bits  
Selects asynchronous flow control  
0 = None (default)  
1 = Hardware flow. CTS from DCE controls DTE.  
2 = Hardware flow. RTS from DTE controls DCE.  
3 = Hardware flow. RTS and CTS flow control.  
4 = Software flow. XON/XOFF from DCE controls  
DTE.  
8 = Software flow. XON/XOFF from DTE controls  
DCE.  
12 = Software flow. XON/XOFF controls DTE and  
DCE.  
S76.......DTE CLOCK  
S135.....  
Selects DTE connector transmit clock timing source.  
0 = Internal (ISU 2x64 supplies timing) (default)  
1 = External (DTE supplies timing)  
Value determines whether or not the ISDN switch  
should consider a DTE port busy. S23 must be pro-  
grammed before this register is used.  
0 = DTE port is not busy (default)  
1 = DTE port is busy  
The following are the string locations for stored numbers 0 - 9:  
SS80.....SN0 LOC  
SS81.....SN1 LOC  
SS82.....SN2 LOC  
SS83.....SN3 LOC  
SS84.....SN4 LOC  
SS85.....SN5 LOC  
SS86.....SN6 LOC  
SS87.....SN7 LOC  
SS88.....SN8 LOC  
SS89.....SN9 LOC  
S118 = 0  
Stored number 0 string  
Stored number 1 string  
Stored number 2 string  
Stored number 3 string  
Stored number 4 string  
Stored number 5 string  
Stored number 6 string  
Stored number 7 string  
Stored number 8 string  
Stored number 9 string  
CHAP Authentication (default)  
PAP Authentication (required for MP connection with  
WIN 95)  
S118 =32  
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Appendix D: S-Register List  
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Appendix E  
Connector Pinouts  
PIN 13  
PIN 25  
PIN 1  
FEMALE  
PIN 14  
Figure E-1  
EIA-232 Interface  
Table E-A  
EIA-232 Interface  
Pin  
Name  
I/O  
Description  
1 ............................Shield ....................I/O........ Shield for cable  
2 ............................TD.........................I............. Transmitted Data  
3 ............................RD.........................O........... Received Data  
4 ............................RTS........................I............. Request to Send  
5 ............................CTS.......................O........... Clear To Send  
6 ............................DSR.......................O........... Data Set Ready  
7 ............................SG........................I/O........ Signal Ground  
8 ............................CD........................O........... Carrier Detect  
9 ............................NC .......................N/A ...... No Connection  
10 ..........................NC .......................N/A ...... No Connection  
11 ..........................NC .......................N/A ...... No Connection  
12 ..........................NC .......................N/A ...... No Connection  
13 ..........................NC .......................N/A ...... No Connection  
14 ..........................NC .......................N/A ...... No Connection  
..............................15 ........................TC ......... O Transmit Clock  
16 ..........................NC .......................N/A ...... No Connection  
17 ..........................RC ........................O........... Receive Clock  
18 ..........................NC .......................N/A ...... No Connection  
19 ..........................NC .......................N/A ...... No Connection  
20 ..........................DTR .......................I............. Data Terminal Ready  
21 ..........................NC .......................N/A ...... No Connection  
22 ..........................RI..........................O........... Ring Indicator  
23 ..........................NC .......................N/A ...... No Connection  
24 ..........................ETC.......................I............. External Transmit Clock  
25 ..........................NC .......................N/A ...... No Connection  
I = Input.............. O = Output........N/A = Not Applicable  
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Appendix E: Connector Pinouts  
PIN 13  
PIN 25  
PIN 1  
FEMALE  
PIN 14  
Figure E-2  
RS-530 Interface  
Table E-B  
RS-530 Interface  
Pin  
Name  
I/O  
Description  
1 ........................... Shield ................... I/O........Shield for cable  
2 ........................... TD-A ..................... I.............Transmitted Data  
3 ........................... RD-A ..................... O...........Received Data  
4 ........................... RTS-A .................... I.............Request To Send  
5 ........................... CTS-A ................... O...........Clear To Send  
6 ........................... DSR-A ................... O...........Data Set Ready  
7 ........................... SG ....................... I/O........Signal Ground  
8 ........................... CD-A .................... O...........Carrier Detect  
9 ........................... RC-B ..................... O...........Receive Clock (return)  
10 ......................... CD-B..................... O...........Carrier Detect (return)  
11 ......................... ETC-B.................... I.............External Transmit Clock (return)  
12 ......................... TC-B ..................... O...........Transmit Clock (return)  
13 ......................... CTS-B.................... O...........Clear To Send (return)  
14 ......................... TD-B...................... I.............Transmit Data (return)  
15 ......................... TC-A..................... O...........Transmit Clock  
16 ......................... RD-B ..................... O...........Receive Data (return)  
17 ......................... RC-A..................... O...........Receive Clock  
18 ......................... NC ...................... N/A.......No Connection  
19 ......................... RTS-B .................... I.............Request To Send (return)  
20 ......................... DTR-A.................... I.............Data Terminal Ready  
21 ......................... NC ...................... N/A.......No Connection  
22 ......................... DSR-B.................... O...........Data Set Ready (return)  
23 ......................... DTR-B.................... I.............Data Terminal Ready (return)  
24 ......................... ETC-A ................... I.............External Transmit Clock  
25 ......................... NC ...................... N/A.......No Connection  
I = Input ..............O = Output .......N/A = Not Applicable  
V .35  
B
A
R
V
Z
Y
DD  
JJ  
F
E
L
NN  
LL  
J
N
T
X
D
C
BB FF  
K
P
U
CC HH MM  
EE KK  
AA  
M
S
W
H
Figure E-3  
V.35 Interface  
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Appendix E: Connector Pinouts  
Table E-C  
V.35 Interface  
(Provided by RS-530/232-to-V.35 Adapter, part number 1200072L1)  
Pin  
Name  
I/O  
Description  
A ............................Shield ....................I/O........ Shield for cable  
B ............................SG........................I/O........ Signal Ground  
C............................RTS........................I............. Request To Send  
D............................CTS.......................O........... Clear To Send  
E.............................DSR.......................O........... Data Set Ready  
F.............................CD........................O........... Carrier Detect  
H............................DTR .......................I............. Data Terminal Ready  
J .............................RI..........................O........... Ring Indicator  
P.............................SD-A......................I............. Send Data  
R.............................RD-A......................O........... Receive Data  
S ............................SD-B......................I............. Send Data (return)  
T.............................RD-B ......................O........... Receive Data (return)  
U............................TC-A......................I............. External Transmit Clock  
V ............................RC-A......................O........... Receive Clock  
W...........................TC-B......................I............. External Transmit Clock (return)  
X.............................RC-B......................O........... Receive Clock (return)  
Y ............................ST-A ......................O........... Send Timing  
AA..........................ST-B.......................O........... Send Timing (return)  
K,L ..........................NC .......................N/A ...... No Connection  
M,N........................NC .......................N/A ...... No Connection  
BB...........................NC .......................N/A ...... No Connection  
CC .........................NC .......................N/A ...... No Connection  
DD..........................NC .......................N/A ...... No Connection  
EE...........................NC .......................N/A ...... No Connection  
FF ...........................NC .......................N/A ...... No Connection  
HH..........................NC .......................N/A ...... No Connection  
JJ.............................NC .......................N/A ...... No Connection  
KK...........................NC .......................N/A ...... No Connection  
LL............................NC .......................N/A ...... No Connection  
MM ........................NC .......................N/A ...... No Connection  
NN ........................NC .......................N/A ...... No Connection  
I = Input.............. O = Output......... ............N/A = Not Applicable  
PIN 13  
PIN 1  
FEMALE  
PIN 25  
PIN 14  
Figure E-4  
RS-366 Interface  
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Appendix E: Connector Pinouts  
Table E-D  
RS-366 Interface  
Pin  
Name  
I/O  
Description  
1 ........................... Shield ................... I/O........Shield for cable  
2 ........................... DPR ...................... I.............Digit Present  
3 ........................... ACR...................... O...........Abandon Call and Retry  
4 ........................... CRQ..................... I.............Call Request  
5 ........................... PND ..................... O...........Present Next Digit  
6 ........................... PWI...................... O...........Power Indication  
7 ........................... SG ....................... I/O........Signal Ground  
13 ......................... DSC ..................... O...........Distant Station Connect  
14 ......................... NB1..................... I.............Digit LSB  
15 ......................... NB2..................... I.............Digit bit 2  
16 ......................... NB4..................... I.............Digit bit 3  
17 ......................... NB8..................... I.............Digit bit MSB  
22 ......................... DLO...................... O...........Data Line Occupied  
8-12....................... NC ...................... N/A.......No Connection  
18-21..................... NC ...................... N/A.......No Connection  
23-25..................... NC ...................... N/A.......No Connection  
I = Input ..............O = Output........ ............ N/A = Not Applicable  
PIN 1 PIN 8  
ISDN  
Figure E-5  
RJ-45 Dial Line Connector U Interface  
Table E-E  
RJ-45 Dial Line Connector U Interface  
Pin  
4
5
Description  
Ring  
Tip  
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Appendix E: Connector Pinouts  
Table E-F  
RJ-45 Dial Line Connector S/T Interface  
Pin  
3
Description  
TxP  
4
RxP  
5
6
RxN  
TxN  
Table E-G  
Maintenance Connector  
Pin  
Description  
CD  
1
2
3
4
5
6
7
8
9
RD  
TD  
DTR  
SG  
DSR  
RTS  
CTS  
RING  
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Appendix E: Connector Pinouts  
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Appendix F  
Ordering ISDN Without IOCs  
ISDN is a complex service with multiple options. Obtaining ser-  
vice from your local telephone company and long distance pro-  
viders can sometimes be complicated. This appendix guides you  
and your telephone company in specifying and obtaining your  
ISDN service requirements.  
To support most of the features in the ISU 2x64, your telephone  
service needs to meet certain requirements. A general descrip-  
tion of these requirements follows. Depending on your actual  
data service needs, some features may be deleted. Other features  
may not be available in your area. Also, features may be deleted  
for economic reasons, depending on your needs and local tariffs.  
Talk to your telephone company first, and find out which of the  
services listed on the following pages are provided.  
The following form has been designed to assist you. Complete  
and FAX this form to your telephone company to request the  
proper type of ISDN telephone line for use with the ADTRAN  
ISU 2x64.  
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Appendix F: Ordering ISDN Without IOCs  
ISDN Service Ordering Information for the ADTRAN ISU 2x64  
For ADTRAN ISU 2x64 applications, the following guide can be used as an aid in  
ordering basic ISDN service from your local telephone company.  
The ADTRAN ISU 2x64 ISDN Service Unit (part numbers 1200051L1 and 1200051L3)  
includes NT1 and Terminal Adapter functionality and supports data at rates up to 128  
kbps. The ADTRAN ISU 2x64s (part numbers 1200051L2 and 1200051L4) are tradi-  
tional Terminal Adapters and do not include NT1 functionality. The ADTRAN ISU  
2x64 International (part numbers 1200051L5 and 1200051L6) also do not include NT1  
functionality.  
Name:_____________________________________________________________________  
Address:___________________________________________________________________  
City: _________________________________ State:_______________________________  
Zip Code: ___________________ Daytime telephone number: __________________  
Request an ISDN Basic Rate Interface (BRI) line.  
U-interface reference point  
2B1Q line coding  
2B+D Service (supports up to 128 kbps)  
The ISU 2x64 supports the following switch types and software protocols.  
AT&T 5ESS  
Custom, 5E6 and later software, National ISDN-1  
NTI DMS-100  
BCS-32 and later software (PVC1), National ISDN-1  
(PVC2)  
Siemens EWSD  
NEC Switch  
Euro ISDN  
National ISDN-1  
NTT Protocol  
ETS300 Protocol  
Request that the ISDN line allocate one dynamic terminal endpoint identifier (TEI) per  
phone number.  
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Appendix F: Ordering ISDN Without IOCs  
For service offered from an AT&T 5ESS, request a multipoint line, with the following  
features:  
Feature  
B1 Service  
B2 Service  
Data Line Class  
Value  
On Demand (DMD)  
On Demand (DMD)  
Multipoint  
Maximum B Channels  
Circuit Switched Voice Bearer (CSV) Channels  
2
Any  
Number of CSV calls  
Circuit Switched Data (CSD) Bearer Channels  
Number of CSD calls  
1 (recommended for testing purposes)  
Any  
2
Terminal Type  
Type A  
Turn the following features off:  
Packet Mode Data  
Multiline Hunt  
Multiple Call Appearances  
Electronic Key Telephone Sets (EKTS)  
Shared Dictionary Numbers  
Accept Special Type of Number  
Intercom Groups  
Network Resource Selector (Modem Pools)  
Message Waiting  
Hunting  
InterLATA Competition  
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Appendix F: Ordering ISDN Without IOCs  
For service offered from a Northern Telecom DMS-100, request a multipoint line, with  
the following features.  
Line Type  
Basic Rate, Functional  
Electronic Key Telephone Sets (EKTS)  
Call Appearance Handling (CACH)  
Non-Initializing Terminal  
Circuit Switched Service  
Packet Switched Service  
TEI  
No  
No  
No  
Yes  
No  
Dynamic  
Bearer Service  
Circuit Switched Voice and Data Permitted on any  
B Channel (Packet mode data not permitted)  
Identify your long distance carrier of choice and request circuit-switched 64 kbps  
Clear Channel access if possible.  
Long distance access should be provided through_______________________________.  
Ensure that the telephone company provides you with the following information for  
configuring the ISU 2x64:  
ISDN switch type  
ISDN switch protocol version  
ISDN phone number(s)  
Service profile identification (SPID) number(s) with prefixes  
and suffixes, if applicable (if ISDN line is multipoint)  
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Appendix F: Ordering ISDN Without IOCs  
LOCAL INTERFACE REQUIREMENTS  
Physical Interface  
ISDN Basic Rate Interface (BRI) line  
U-interface reference point  
2B1Q line coding  
ISDN service must be provided from one of the following CO  
switches and protocols:  
Switch  
Protocol  
AT&T 5ESS  
Custom (5E6 or later software)  
National ISDN-1  
Northern Telecom DMS-100  
Siemens EWSD  
BCS-32 or later software (Pvc1)  
National ISDN-1 (Pvc2)  
National ISDN-1  
The interface provides the ability to allocate one dynamic (TEI)  
per phone number.  
Local Service  
Bearer capabilities:  
- Circuit mode voice service for speech and 3.1 kHz  
audio.  
- Circuit mode data service for 56 kbps and 64 kbps  
unrestricted data.  
Two simultaneous calls supported on the interface. Any mix  
of speech and data bearer capabilities is supported for both  
bearer channels on incoming and outgoing calls.  
Service provided inside the LATA for the bearer capabilities.  
Long distance access for the bearer capabilities to and from  
the long distance providers of choice.  
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Appendix F: Ordering ISDN Without IOCs  
Long Distance Service  
If facilities are available, subscribe to long distance service sup-  
porting the bearer capabilities previously listed. Request service  
supporting circuit-switched 64 kbps or 56 kbps access. It is rec-  
ommended that the same long distance carrier end-to-end  
throughout the network to be used.  
Deciding What Services to Order  
If you are new to ISDN, first obtain the features previously listed.  
Refer to the section ISDN Service Ordering Information in this  
appendix as a basic guide. It is easier to begin operating on a full  
featured line because more options are available. Later, features  
not actually used can be deleted.  
If all of the previous features are not available, compare the actual  
data service requirements with those which are available. A  
likely problem is the lack of a clear trunk to provide 64 kbps unre-  
stricted data service. A solution is to use to 56 kbps service.  
Sometimes voice circuits are suitable for data service at a reduced  
bit rate.  
5ESS Custom Line Additional Parameters  
The AT&T 5ESS central office telephone switch supports a propri-  
etary ISDN D-channel call control protocol called Custom which  
is based on CCITT recommendations. The ISU 2x64 configured  
for switch type AT&T 5ESS will work with lines providing this  
protocol on 5ESS switches with software version 5E6 or later.  
The ISU 2x64 supports the following configurations on 5ESS cus-  
tom lines:  
Point-to-point with one phone number  
Multipoint with one phone number  
Multipoint with two phone numbers (recommended configu-  
ration)  
The requirements for the 5ESS point-to-point line are defined in  
Table F-A.  
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Table F-A  
5ESS Features  
B1 service  
On-Demand (DMD)  
On-Demand(DMD)  
Point-to-point  
2
B2 service  
Data line class  
Maximum B channels  
Number of circuit switched voice (CSV) calls  
Circuit switched voice bearer channels  
Number of circuit switched data (CSD) calls  
Circuit switched data bearer channels  
Terminal type data bearer channels  
2
Any  
2
Any  
Type A  
Multipoint lines require the phone company to create a SPID for  
each phone number on the line. With the exception of the ability  
to spread two calls across two phone numbers, multipoint lines  
offer no special features, and may create complications. How-  
ever, if you use a multipoint line, the parameters are similar to the  
point-to-point line, except for the SPIDs.  
The 5ESS switch can provide a variety of supplementary features  
which the ISU 2x64 may not support. Enabling these features  
may have undesirable consequences. Avoid the following fea-  
tures:  
Packet Mode Data  
Multiline hunt groups  
Electronic key telephone set (EKTS)  
Shared directory numbers  
Intercom groups  
Network resource selector (modem pools)  
Message waiting  
Hunting  
InterLATA competition  
Accept special type of number  
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Appendix F: Ordering ISDN Without IOCs  
DMS-100 Protocol Version 1 Line Additional Parameters  
The Northern Telecom DMS-100 telephone switch supports a  
proprietary ISDN D-channel call control protocol called Pvc1  
which is based on CCITT recommendations. The ISU 2x64 con-  
figured for switch-type DMS-100 is functional on lines providing  
this protocol on DMS-100 switches with software version BCS-32  
or later. The ISU 2x64 supports the following configurations on  
DMS-100 lines:  
Multipoint with one phone number (1B+D service)  
Multipoint with two phone numbers (for 2B+D service)  
The requirements for the DMS-100 multipoint line are defined in  
the sections Local Interface, Local Service, and in Table F-B, all in  
this appendix. The line should have two service profiles with the  
following parameters to support BONDING.  
Table F-B  
DMS Features  
Line type  
Basic Rate, Functional  
Electronic key telephone set (EKTS)  
Call appearance handling (CACH)  
Initializing terminal  
No  
No  
Yes  
Bearer service  
Circuit Switched Voice and Data permitted.  
Packet mode data not permitted.  
Circuit switched service  
Packet switched service  
Protocol Version  
TEI  
Yes  
No  
Functional PVC 1  
Dynamic  
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After Service Is Installed  
When the line is installed, the following information will be pro-  
vided by the local phone service provider:  
A seven-digit LDN for the line. If the line is multipoint with  
two phone numbers, two LDNs are provided.  
If the line is multipoint, a SPID is provided for each LDN.  
Dialing information, including the area code, for the line.  
Any special instructions for dialing outside lines, dialing 4-  
digit local extension numbers, and prefixes for using the de-  
sired long distance provider.  
SETTING UP THE ISU 2X64 FOR A NEW LINE  
1. Disconnect the ISDN line from the ISU 2x64.  
2. Turn on the ISU 2x64, verify that it passes self test.  
3. Turn off the ISU 2x64; while holding down 0, turn on the ISU  
2x64. Continue to press down 0 for 15 seconds. This will re-  
set all the internal settings to factory defaults.  
4. The ISU 2x64 is now set up for 5ESS Custom. If this is not the  
correct line-type, select CONFIG, Netw. Options, Dial Line,  
Switch Type, and the desired switch type.  
5. Enter the SPIDs and LDNs for the ISDN multipoint line. Se-  
lect CONFIG, Netw. Options, Dial Line, Terminal ID, Set  
SPID/Set LDN and enter the SPIDs and LDNs. Make sure  
that SPID1 corresponds to LDN1 and SPID2 corresponds to  
LDN2.  
6. Turn the ISU 2x64 off for 2 seconds, then on. This is required  
after changing any of the previous settings. The ISU 2x64  
should now be set up for your ISDN line. You may wish to  
verify the settings.  
7. Connect the ISDN line to the ISDN IFC connector on the ISU  
2x64. The front panel should read Link Down and progress  
to Ready as the line is activated. This process may take a  
minute.  
At this point, if the ISU 2x64 does not read Ready, see the section  
If the ISU 2x64 Does Not Read Ready in the chapter Troubleshooting.  
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Acronyms  
2B1Q  
AMI  
B (Channel)  
BONDING  
bps  
BRI  
CCITT  
2 Binary, 1 Quarternary  
Alternate Mark Inversion  
A 64 kbps digital information channel  
Bandwidth On Demand Interoperability Group  
Bits per second  
Basic Rate Interface  
Consultative Committee for International Telegraphy and Te-  
lephony  
Carrier Detect  
Connect Incoming Call  
Clear to Send  
Data Communications Equipment  
Digital Multiplex Switching  
Data Set Ready  
Data Terminal Equipment  
Electronic Key Telephone Service  
Facsimile  
High Layer Compatibility  
Identification  
Inteface  
Input/Output  
CD  
CIC  
CTS  
DCE  
DMS  
DSR  
DTE  
EKTS  
FAX  
HLC  
ID  
IFCE  
I/O  
ISDN  
ISO  
Integrated Services Digital Network  
International Standardization Organization  
Kilobits per second  
kbps  
kHz  
LAN  
LDN  
Mbps  
NT1  
PBX  
PC  
Kilohertz  
Local Area Network  
Local Directory Number  
Megabits per second  
Network Termination 1  
Private Branch Exchange  
Personal Computer  
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Acronyms  
PRI  
Primary Rate Interface  
SPCS  
SPID  
TA  
TE  
TEI  
Stored Program Controlled Switching System  
Service Profile Identifier  
Terminal Adapter  
Terminal Equipment  
Terminal Endpoint Identifier  
Wide Area Network  
WAN  
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Glossary  
asynchronous transmission  
Not Synchronous. A method of data transmission which allows characters to be  
sent at irregular intervals by preceding each character with a start bit and following  
it with a stop bit. The timing of the transmission is not determined by the timing of  
a previous character. Applications include communication between most small  
computers (especially PCs) and mainframes, lower speed transmission, and less  
expensive computer transmission systems. See Synchronous.  
B-channel  
64 kbps bearer channel used for voice, circuit, or packet switched data.  
bandwidth  
The range of electrical frequencies a device is capable of handling. The amount of  
bandwidth a channel is capable of carrying tells you what kinds of communica-  
tions can be carried on it. For example, a wide band circuit can carry a TV channel.  
A wide band circuit that is capable of providing one video channel can also pro-  
vide 1,200 voice telephone channels.  
bearer service  
As defined by CCITT standards, a type of telecommunication service that provides  
the capability for the transmission of information between user-to-network inter-  
faces. Bearer services defined for ISDN are circuit mode and packet mode.  
BONDING mode 1 protocol  
Industry standard B-channel aggregation protocol. Developed by the Bandwidth  
on Demand Interoperability Group.  
BRA  
basic rate access. The BRA includes two 64 kbps B-channels and one 16 kbps D-  
channel. Also known as Basic Rate Interface (BRI).  
bridging  
The technique whereby additional stations may be served from a two-point facility  
by extending the facility from a bridge at one of the facility’s terminating points.  
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Glossary  
CCITT  
Consultative Committee on International Telephony and Telegraphy. A body of  
the International Telegraph Union (ITU) which prepares recommendations, com-  
monly referred to as international standards, to resolve technical telegraph and  
telephone problems.  
central office (CO)  
In telephony, the facility housing the switching system and related equipment that  
provides telephone service for customers in the immediate geographical area.  
circuit mode  
Type of switching that assigns a call to a specific circuit path. The circuit is not  
shared with other calls.  
clear channel  
A channel in which all the 64 kbps are used for transmission. To achieve this, bit  
robbing signalling must be eliminated. (NOTE: Not to be confused with clear chan-  
nel protocol.)  
common channel interoffice signalling (CCIS)  
A signalling system developed for use between stored program switching systems.  
All of the signalling information for a group of trunks is transmitted over a dedi-  
cated high-speed data link rather than on a trunk. CCIS reduces call setup time  
compared to individual trunk signalling.  
CPE  
Customer premises equipment. A generic term for communications terminal gear  
owned by the customer, residing on customer premises.  
CSU  
Channel service unit. A component of CPE used to terminate a digital circuit, such  
as DDS or T1 at the customer site. Performs certain line-conditioning functions,  
ensures network compliance per FCC rules, and responds to loopback commands  
from the central office. Also ensures proper 1s density in transmitted bit stream  
and performs bipolar violation correction. See DSU.  
D-channel  
The ISDN channel that carrier signalling information to control the call setup, tear-  
down, or invocation of supplementary services. The D-channel may also be used  
to provide packet mode data service.  
DCE  
data communications equipment. The portion of a data terminal that provides the  
interface to the network.  
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Glossary  
DDS  
dataphone digital service. AT&T private line service for transmitting data over a  
digital system. The digital transmission system transmits electrical signals direct-  
ly, instead of translating the signals into tone of varied frequencies as with tradi-  
tional analog transmission systems. Digital techniques provide more efficient use  
of transmission facilities, resulting in lower error rates and costs than analog sys-  
tems.  
digital  
Referring to communications procedures, techniques, and equipment where infor-  
mation is encoded as either a binary 1 or 0, the representation of information in dis-  
crete binary form, discontinuous in time, as opposed to the analog representation  
of information in variable but continuous waveforms.  
DSU  
data service unit. A device providing interface between a data terminal or other  
data communications device and a digital access line.  
DTE  
data terminal equipment. The portion of a data terminal that interfaces to the end-  
user’s equipment. The main difference between DCE and DTE is that pins 2 and 3  
are reversed on the EIA-232.  
Frame  
A group of bits sent serially over a communications channel. Generally a local  
transmission unit sent between data-link-layer entities that contains its own con-  
trol information for addressing and error checking. The basic data transmission  
unit is employed with bit-oriented protocols, similar to blocks. In video transmis-  
sion, a set of electron scan lines that comprise a television picture (usually 525 in  
the U.S.).  
in-band signalling  
Signalling made up of tones which pass within the voice frequency band and are  
carried along the same circuit as the talk path being established by the signals. Vir-  
tually all signalling (request for service, dialing, disconnect, etc.) in the U.S. is in-  
band signalling. Most of that signalling is MF (multi-frequency) dialing. The more  
modern form of signalling is out-of-band.  
information element  
The name for the data fields within an ISDN Layer 3 message.  
interface  
A common boundary between two systems over which the inter-system commu-  
nication occurs.  
interworking  
Communication between two types of networks or end equipment. This may or  
may not involve a difference in signalling or protocol elements supported.  
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Glossary  
ISDN  
Integrated service digital network. A network architecture that enables end-to-  
end digital connections. The network supports diverse services through integrat-  
ed access arrangements and defines a limited set of standard, multipurpose inter-  
faces for equipment vendors, network providers, and customers. Interworking  
with a public switched telephone network is retained.  
LATA  
Local Access and Transport Area. One of 161 local telephone serving areas in the  
United States, generally encompassing the largest standard statistical metropoli-  
tan areas. Subdivisions established as a result of the AT&T divestiture that now  
distinguish local from long distance service. Circuits with both end-points within  
the LATA (intraLATA) are generally the sole responsibility of the local telephone  
company, while circuits that cross outside the LATA (interLATA) are passed on to  
an interexchange carrier.  
Loopback  
A diagnostic procedure where data is sent to the device being tested, and the out-  
put of the device is fed directly back to its input, looped around, and the returning  
data is checked against that which was sent.  
loopback test  
A test typically run on a 4-wire circuit. Two transmit leads are joined to the two  
receive leads. A signal is then sent around the loop. Measuring differences be-  
tween the sent and received signal is the essence of a loopback test.  
master clock  
The source of timing signals, or the signals themselves, which all network stations  
use for synchronization.  
message  
The Layer 3 information that is passed between the CPE and SPCS for signalling.  
multiplexing  
The combining of multiple data channels onto a single transmission medium. Any  
process through which a circuit normally dedicated to a single user can be shared  
by multiple users. Typically, user data streams are interleaved on a bit or byte ba-  
sis (time division) or separated by different carrier frequencies (frequency divi-  
sion).  
multipoint circuit  
A circuit consisting of three or more stations connected directly electrically.  
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Glossary  
NEXT (near-end crosstalk)  
Unwanted energy transferred from one circuit to an adjoining circuit. Occurs at  
the end of the transmission link where the signal source is located. The absorbed  
energy is usually propagated in the direction opposite to the absorbing channel’s  
normal current flow. Caused by high-frequency or unbalanced signals and insuf-  
ficient shielding.  
non-ISDN line  
Any connection from a CPE to a SPCS that is not served by D-channel signalling.  
non-ISDN trunk  
Any trunk not served by either SS7 or D-channel signalling.  
NT1  
Network Termination 1. A unit that provides physical and electromagnetic termi-  
nation of the U-interface 2-wire transmission line, converts between Layer 1 for-  
mats used at the U- and T- reference points, and performs some maintenance  
functions.  
packet mode  
Refers to switching of packets of information for different users by statistically  
multiplexing them over the same transmission facilities. ISDN packet mode capa-  
bilities are based on CCITT Recommendation X.25 procedures.  
point-to-point  
Describing a circuit connecting two points directly with no intermediate process-  
ing nodes or computers (although switching facilities could exist). A type of con-  
nection that links two logical entities (i.e., phone-line circuit).  
S-interface  
S-reference point. The interface that connects an ISDN terminal (TE1) or Terminal  
Adapter (TA) to the NT2 reference point as defined in the I.411 Recommendation.  
SPCS  
stored program controlled switch. A digital switch that supports call control, rout-  
ing, and supplementary services provision under software control. All ISDN  
switches are SPCSs  
SDLC  
synchronous data link control. A data communications line protocol associated  
with the IBM System Network Architecture. SDLC is a bit-oriented protocol (not  
a character-oriented protocol) that includes multiple block error checking and full  
duplex line operation.  
sync bits  
Framing or synchronizing bits in synchronous transmission.  
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Glossary  
synchronous  
1. The condition occurring when two events happen in a specific time relationship  
with each other, both under control of a master clock. 2. A method of data trans-  
mission requiring the transmission of timing pulses to keep the sender and receiv-  
er synchronized in their communication used to send blocks of information.  
Synchronous data transmission is used in high-speed data circuits because there is  
less overhead than asynchronous transmission of characters which contain two ex-  
tra bits per character to affect timing.  
T1  
Also T-1. A digital transmission link with a capacity of 1.544 Mbps. T1 uses two  
pairs of normal twisted wires. T1 normally can handle 24 voice conversations with  
each conversation being digitized at 64 kbps. With more advanced digital voice  
encoding techniques, it can handle more voice channels. T1 is a standard for digi-  
tal transmission in North America.  
TA  
Terminal Adapter. A DCE that connects to the ISDN S-Interface and enables non-  
ISDN terminal equipment to communicate over ISDN.  
TE1  
TE2  
terminal equipment type 1. ISDN-compatible terminals.  
terminal equipment type 2. Non-ISDN terminal equipment linked at the EIA-232,  
RS-449, or V.35 interface.  
transmission  
The dispatching of a signal, message, or other form of intelligence by wire, radio,  
telegraphy, telephony, facsimile, or other means. A series of characters, messages  
or blocks including control information and user data. The signalling of data over  
communications channels.  
transmission level  
The power of a transmission signal at a point of a transmission facility. It may be  
measure in absolute terms (dBm) or in a ratio to its level at some reference point  
(dB).  
twisted pair  
Two wires twisted around each other to reduce induction (interference) from one  
wire to the other. Several sets of twisted pair wires may be enclosed in a single ca-  
ble. Twisted pair is the normal cabling from a Central Office to your home or of-  
fice, or from your PBX to your office phone. Twisted pair wiring comes in various  
thicknesses. As a general rule, the thicker the cable is, the better the quality of the  
conversation and the longer cable can be and still get acceptable conversation qual-  
ity. However, the thicker it is, the more it costs.  
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Glossary  
2B+D  
The basic rate interface (BRI) in ISDN. A single ISDN circuit divided into two 64  
kbps digital channels for voice or data and one 16 kbps channel for low speed data  
(up to 9,600 baud) and signalling. 2B+D is carried on one or two pairs of wires de-  
pending on the interface, the same wire pairs that today bring a single voice circuit  
into your home or office. See ISDN.  
U-interface  
A twisted pair subscriber loop that connects the NT1 reference point to the ISDN  
network, as defined in the I.411 Recommendation. This interface provides basic  
rate access with an operating frequency of 160 kbps and an information rate of 144  
kbps. Under U.S. regulations, this also marks the line of demarcation between cus-  
tomer-owned equipment and the public network.  
V.32  
9.6 kbps, 2-wire duplex modem standard.  
videoconferencing  
The real-time, usually two-way, transmission of digitized video images between  
two or more locations. Videoconferencing requires a wideband transmission facil-  
ity. Transmitted images may be freeze-frame (where television screen is repainted  
every few seconds to every 20 seconds) or full motion. Bandwidth requirements  
for two-way video conferencing range from six MHz for analog, full-motion, full-  
color, commercial grade TV to 56 kbps for digitally-encoded freeze-frame to 1.544  
kbps for high-quality, full-color, full-motion TV.  
X.25  
A packet data transfer protocol for the B and D-channels. Defines the interface be-  
tween data terminal equipment (DTE) and data circuit terminating equipment  
(DCE) for terminals operating in the packet mode and connected to public data  
networks by dedicated circuits.  
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Glossary  
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Index  
busy out port  
disabled 34  
enabled 34  
setting 33  
Numerics  
2B1Q leased digital service 47  
5ESS custom line additional parameters  
130  
C
5ESS features 131  
call screening  
setting 45  
A
call type  
adapters  
setting 31  
RS-530-to-V.35 14  
always tone 44  
answer call 64  
answer tone  
CD options 51  
cfg. rmt. unit 75  
channel rate 48  
clear channel 56  
clock mode  
setting 43  
async. rev. 58  
slave/master 47  
configuration 27  
quick setup 65  
configuration screen 22  
configuration, 27  
connect timeout  
setting 45  
AT command processor 38  
AT commands 36, 37, 89  
AT commands, 85, 89  
AT&T 5ESS, 28  
audio 31  
auto answer 40  
setting 42  
connection  
autobaud 54  
dial interface 16  
DTE data 14  
network 13  
B
connector pinouts 119  
connector type 51  
CTS options 51  
B channel aggregation 86  
bit rate 51  
BONDING mode 1 56  
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Index  
current status menu 18  
DSU 57.6 async 59  
DTE data connection 14  
DTE indicators 3, 18  
DTE interface 85  
current status messages 95  
D
DTE options for async and sync opera-  
tion 50  
data 56kbps 31  
data 64kbps 31  
data format (async) 53  
data rates  
DTR options 52  
E
(DTE) 86  
(network) 85  
EIA-232 interface 119  
environmental specifications 87  
dial 112K sync 67  
dial 115.2 asyn 69  
dial 128K sync 68  
dial 56K sync 66  
dial 57.6 asyn 68  
dial 64K sync 67  
dial interface connection 16  
dial line menu tree 27  
dial line operation 27  
dial line, 27  
F
factory setup 71  
fallback 60  
fallback 57.6k 69  
FEBE 26  
flow control 52  
front panel 3, 4  
dialing options 63  
dial menu tree 63  
dial number 64  
dial options 63  
AT commands 36  
front panel 34  
RS 366 34  
setting 34  
dial options, 73  
dial stored # 64  
dial stored #, 75  
dialing 2  
G
getting started 19  
getting TEI #2, 81  
H
hang up line 64  
I
dialing options  
answer call, 75  
dial number, 75  
V.25 bis 39  
dialing options screen 63  
dialing selections 85  
disabled 34  
display 87  
DSR options 52  
if self test fails 77  
if the ISU 2x64 does not read ready 77  
if the wrong DTE port answers a call 83  
if you cannot connect calls 84  
in-band dialing  
disabled 42  
incoming tone 44  
indicators 3  
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Index  
installation  
ISU 2x64  
lock keypad 74  
loopback both DTEs 26  
loopback disable 25  
loopback DTE 24  
installation 13  
interface  
maintenance 15  
loopback network 24  
loopback points 24  
loopback protocol 24  
loopback remote 25  
Lpbk remote 1B 75  
Lpbk remote 2B 75  
interfaces 2  
interoperability 4, 86  
ISDN  
ordering codes 9  
overview 1  
service 9  
ISU 2x64  
M
dialing from 2  
front panel 3, 4  
interfaces 2  
interoperability 4  
operation 17  
overview 1  
maintenance connector 123  
maintenance help screen 15  
maintenance interface 15  
menu navigation 17  
multilink PPP 62  
rear panel 2  
single port operation 4  
N
L
NEBE 26  
negotiation fail, 105  
network connection 13  
network interface 85  
no answer tone 44  
LCD configuration menu tree 29  
ldm 64K master 70  
LDNs  
setting 33  
Northern Telecom DMS-100, 28  
leased 64K 70  
leased application with channel banks  
48  
O
leased line service 47  
operating protocols 6  
operation 17  
LED indicators  
carrier detect, 87  
dial line 27  
clear to send, 87  
ordering ISDN without IOCs 125  
outgoing tone 44  
data set ready, 87  
data terminal ready from DTE, 87  
receive data, 87  
out-of-band RS 366 dialing 16  
request to send, 87  
transmit data, 87  
P
LED indicators, 87  
limited distance modem application 48  
physical specifications 87  
pinouts  
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ISU 2x64 Dual Port ISDN Service Unit User Manual  
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Index  
maintenance connector, 123  
RS-530-to-V.35 adapters 14  
RTS options 51  
RJ-45 dial line connector S/T inter-  
face, 123  
RJ-45 dial line connector U interface,  
122  
S
SAP 59  
RS-366, 122  
Sbus termination 46, 49  
security 73  
RS-530, 120  
V.35, 121  
security menu tree 73  
self test fails 77  
point-to-point async-to-sync 61  
point-to-point protocol 62  
power 87  
set password 74, 75  
setting answer tone 43  
setting auto answer 42  
setting call screening 45  
setting connect timeout 45  
setting protocol options 55  
setting the busy out port 33  
setting the call type 31  
setting the dial options 34  
setting the LDN 33  
setting the SPID 32  
setting the switch protocol 28  
setting the terminal ID 32  
single port operation 4  
smart dial strings 32  
software version 26  
specifications 85  
PPP async-to-sync 61  
PPP protocol 62  
PPP with compression 62  
protocol options  
setting 55  
Q
quick setup configuration 65  
quick setup menu tree 65  
quick setup, 65, 66  
R
rate adaptation protocols 60  
rate adaption 86  
rear panel 2  
recommended operating protocols 6  
redial last # 64  
register SPID #2, 82  
remote config 74  
speech 31  
SPIDs 4, 6  
setting 32  
S-registers 37, 38  
list 109  
remote config menu tree 74  
RJ-45 dial line connector S/T interface  
123  
status buffer 20  
status buffer messages 99  
status screen 21  
RJ-45 dial line connector U interface 122  
store/review # 64  
switch compatibility 86  
switch protocol  
RS 366 dialing  
out-of-band 16  
RS-366 interface 121, 122  
RS-366 interface, 85  
setting 28  
RS-530 interface 120  
148  
ISU 2x64 Dual Port ISDN Service Unit User Manual  
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Index  
T
TANULL 58  
TCID 58  
terminal ID  
setting 32  
test 2047 both 26  
test menu screen 23  
test menu tree 24  
test options 23  
test remote 25  
testing 23  
T-link 59  
transmit clock (async) 53  
troubleshooting 77  
troubleshooting calls 84  
TXADD01 57  
TXDEQ 58  
TXFA 57  
TXINIT 57  
V
V.110 59  
V.120 58  
V.25 39  
V.25 async dialing 40  
V.25 bis, 85  
V.25 HDLC flag 42  
V.25 sync bisync dialing 42  
V.25 sync HDLC Dialing 41  
V.35 interface 120, 121  
VT 100 configuration menu tree 28  
VT 100 configuration screen 22  
VT 100 dialing options screen 63  
VT 100 maintenance help screen 15  
VT 100 menu support 19  
VT 100 status screen 21  
VT 100 test menu screen 23  
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ISU 2x64 Dual Port ISDN Service Unit User Manual  
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Index  
150  
ISU 2x64 Dual Port ISDN Service Unit User Manual  
61200051L1-1D  
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Product Support Information  
Presales Inquiries and Applications Support  
Please contact your local distributor, ADTRAN Applications En-  
gineering, or ADTRAN Sales:  
Applications Engineering (800) 615-1176  
Sales  
(800) 827-0807  
Post-Sale Support  
Please contact your local distributor first. If your local distributor  
cannot help, please contact ADTRAN Technical Support and have  
the unit serial number available.  
Technical Support (888)4ADTRAN  
Repair and Return  
If ADTRAN Technical Support determines that a repair is needed,  
Technical Support will coordinate with the Customer and Product  
Service (CAPS) department to issue an RMA number. For infor-  
mation regarding equipment currently in house or possible fees  
associated with repair, contact CAPS directly at the following  
number:  
CAPS Department (256) 963-8722  
Identify the RMA number clearly on the package (below address),  
and return to the following address:  
ADTRAN, Inc.  
CAPS Department  
901 Explorer Boulevard  
Huntsville, Alabama 35806-2807  
RMA # _____________  
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