ADTRAN ISU 128 User Manual
61202.029L2-1D
January 1998
ISU 128
128 kbps ISDN Service Unit
USER MANUAL
Part Numbers
1202029L2 115 VAC
1202029L3 115 VAC with V.34 Modem Option
Trademarks:
DMS-100 is a trademark of Northern Telecom.
ISU is trademark of ADTRAN, Incorporated.
Macintosh is a registered trademark of Apple Computer, Incorporated.
Stac is a registered trademark and LZS is a trademark of Stac Electronics.
Windows is a registered trademark of Microsoft Corporation.
5ESS is a registered trademark of AT&T.
Windows
MNP
®
95 is a registered trademark of Microsoft Corporation.
®
is a registered trademark of Microcom, Incorporated.
901 Explorer Boulevard
P.O. Box 140000
Huntsville, AL 35814-4000
Phone: (205) 963-8000
© 1998 ADTRAN, Inc.
All rights reserved.
Printed in USA.
FCC regulations require that the following information be provided to the customer in this manual.
1. If your telephone equipment ( ISU 128) causes harm to the telephone network, the
telephone company may discontinue your service temporarily. If possible, they
will notify you in advance. But if advance notice isn’t practical, you will be notified
as soon as possible. You will be advised of your right to file a complaint with the
FCC.
2. Your telephone company may make changes in its facilities, equipment, operations,
or procedures that could affect the proper operation of your equipment. If they do,
you will be given advance notice so as to give you an opportunity to maintain uninterrupted service.
3. If you experience trouble with this equipment ( ISU 128), please contact ADTRAN
(see inside back cover) for repair/warranty information. The telephone company
may ask you to disconnect this equipment from the network until the problem has
been corrected, or until you are sure the equipment is not malfunctioning.
4. This unit contains no user-serviceable parts.
To ADTRAN service personnel: For continued protection against risk of fire, replace F1 with the same type and rating of fuse only : .2 A, 250 V.
FEDERAL COMMUNICATIONS COMMISSION
RADIO FREQUENCY INTERFERENCE STATEMENT
FCC ID: HDC1202029TL
This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide
reasonable protection against harmful interference in a residential environment. This
equipment generates, uses, and can radiate radio frequency energy and, if not installed
and used in accordance with the instructions, may cause harmful interference to radio
or TV reception, which can be determined by turning the equipment off and on. The
user is encouraged to try to correct the interference by one or more of the following
measures:
• R eorient or relocate the receiving antenna.
• Increase the separation between the equipment and receiver.
• Connect the equipment into an outlet on a circuit different from that to
which the receiver is connected.
• Consult the dealer or an experienced radio/TV technician for help.
This device is FCC Class B certified only on the EIA-232 interface. The
V.35 and RS-530 interfaces are FCC Class B verified.
Changes or modifications not expressly approved by ADTRAN will void
the user’s authority to operate this equipment.
CANADIAN EMISSIONS REQUIREMENTS
This digital apparatus does not exceed the Class B limits for radio noise emissions from
digital apparatus as set out in the interference-causing equipment standard entitled
"Digital Apparatus," ICES-003 of the Department of Communications.
Cet appareil nuerique respecte les limites de bruits radioelectriques applicables aux
appareils numeriques de Class B prescrites dans la norme sur le materiel brouilleur:
"Appareils Numeriques," NMB-003 edictee par le ministre des Communications.
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 degradation 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.
Load Number (LN) assigned to each terminal device denotes the percentage of the
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.
Table of Contents
Chapter 1. Understanding ISDN and the ISU 128 ..................................................... 1
ISDN Overview .................................................................................................................. 1
The ADTRAN ISU 128....................................................................................................... 1
ISU 128 Interoperability .................................................................................................... 4
Recommended Operating Protocols................................................................................ 6
Chapter 2. ISDN Ordering Codes (IOCs)..................................................................... 9
Ordering ISDN using IOCs............................................................................................... 9
Capability S ......................................................................................................................... 10
Applications.......................................................................................................... 10
Capability R.................................................................................................................. 10
Applications.......................................................................................................... 10
Capability B .................................................................................................................. 10
Capability C.................................................................................................................. 10
Chapter 3. Installation..................................................................................................... 11
Network Connection.......................................................................................................... 11
DTE Data Connection........................................................................................................ 12
Dial Interface Connection.................................................................................................. 12
Maintenance Interface ....................................................................................................... 13
Chapter 4. Operation ....................................................................................................... 15
Menu Navigation ............................................................................................................... 15
Getting Started.................................................................................................................... 16
Status Buffer ................................................................................................................. 16
VT 100 Terminal Menu Support ...................................................................................... 17
Status Screen................................................................................................................. 17
Configuration Screen .................................................................................................. 18
Chapter 5. Testing ............................................................................................................ 19
TEST Options...................................................................................................................... 19
Loopback DTE.............................................................................................................. 20
Loopback Network...................................................................................................... 20
Loopback Protocol....................................................................................................... 20
Loopback Remote ........................................................................................................ 21
Test Remote .................................................................................................................. 21
Loopback Disable ........................................................................................................ 21
No Remote Loopbacks.................................................................................. 21
DDS Accepted................................................................................................ 21
V.54 Accepted ................................................................................................ 21
DDS+V54 Accept........................................................................................... 22
61202.029L2-1 ISU 128 User Manual
i
ii
Table of Contents
Near-End Block Errors/Far-End Block Errors (NEBE/FEBE).............................. 22
Software Version.......................................................................................................... 22
Chapter 6. Configuration ................................................................................................. 23
Dial Line Operation............................................................................................................ 23
Switch Protocol ............................................................................................................ 24
Call Type....................................................................................................................... 24
Speech.................................................................................................................... 24
Audio ..................................................................................................................... 25
Data 56 kbps.......................................................................................................... 25
Data 64 kbps (default) ......................................................................................... 25
Terminal Identification ............................................................................................... 25
Setting the SPID.................................................................................................... 25
Setting the LDN.................................................................................................... 26
Dial Options.................................................................................................................. 29
Front Panel............................................................................................................ 29
RS-366 .................................................................................................................... 29
1 sec or EON................................................................................................... 30
2 sec or EON................................................................................................... 30
5 sec or EON (default)................................................................................... 30
10 sec or EON................................................................................................. 30
20 sec or EON................................................................................................. 30
Wait for EON ................................................................................................. 30
AT Commands ............................................................................................................. 30
Using AT Commands ................................................................................... 31
Using S-Registers........................................................................................... 31
Reading S-Registers....................................................................................... 32
Reading S-Register Strings........................................................................... 32
Changing S-Registers.................................................................................... 32
Changing S-Register Strings ........................................................................ 32
Dialing a Call Using the AT Command Processor ................................... 32
V.25 bis .......................................................................................................................... 33
V.25 ASYNC Dialing..................................................................................... 34
V.25 SYNC HDLC Dialing ........................................................................... 35
V.25 SYNC BISYNC Dialing ...................................................................... 35
V.25 HDLC FLAG.......................................................................................... 35
Disabled................................................................................................................. 35
Auto Answer ................................................................................................................ 36
Disabled................................................................................................................. 36
Enabled.................................................................................................................. 36
Dump all calls....................................................................................................... 36
Answer Tone ................................................................................................................ 37
No Answer Tone (Default) ................................................................................. 37
Incoming Tone...................................................................................................... 37
Outgoing Tone...................................................................................................... 37
Always Tone......................................................................................................... 37
Connect Timeout.......................................................................................................... 38
Call Screening............................................................................................................... 38
ISU-128 User Manual 61202.029L2-1
Table of Contents
Leased Line Service............................................................................................................ 40
Clock Mode: Slave/Master ....................................................................................... 40
Channel rate ................................................................................................................. 41
DTE OPTIONS.................................................................................................................... 42
Bit Rate .......................................................................................................................... 42
Connector Type............................................................................................................ 43
RTS Options.................................................................................................................. 43
CTS Options ................................................................................................................. 43
CD Options................................................................................................................... 43
DTR Options................................................................................................................. 43
DSR Options................................................................................................................. 44
Flow Control (Asynchronous Data Format)............................................................ 44
Data Format (Asynchronous) .................................................................................... 45
Transmit Clock (Synchronous Data Format)........................................................... 45
Chapter 7. Protocol Options ............................................................................................ 47
Protocol Options................................................................................................................. 47
Clear Channel............................................................................................................... 48
BONDING Mode 1...................................................................................................... 48
TXINIT ............................................................................................................ 49
TXFA ............................................................................................................... 49
TXADD01 ....................................................................................................... 50
TXDEQ............................................................................................................ 50
TANULL......................................................................................................... 50
TCID................................................................................................................ 50
V.120 .............................................................................................................................. 50
V.110 .............................................................................................................................. 51
V.34 ................................................................................................................................ 51
Error Control.................................................................................................. 51
Compression .................................................................................................. 52
Microcom™ Network Protocol Block Size (MNP® Blk) ......................... 52
DSU 57.6 ASYNC......................................................................................................... 53
T-Link............................................................................................................................ 53
Simple ADTRAN Protocol (SAP).............................................................................. 53
FALLBACK .................................................................................................................. 54
Point-to-Point (PPP) Async-to-Sync ......................................................................... 56
Point-to-Point Protocol (PPP)............................................................................. 56
Multilink Point-to-Point Protocol (MP)............................................................ 56
PPP with Compression ....................................................................................... 57
Chapter 8. Quick Setup .................................................................................................... 59
Quick Setup Configuration............................................................................................... 59
Quick Setup .................................................................................................................. 60
Dial 56K sync* ...................................................................................................... 60
Dial 64K sync* ...................................................................................................... 61
Dial 112K sync* .................................................................................................... 61
Dial 128K sync* .................................................................................................... 62
61202.029L2-1 ISU 128 User Manual
iii
iv
Table of Contents
Dial PPP* ............................................................................................................... 62
V34 115.2 async*................................................................................................... 63
Dial 57.6 asyn* ...................................................................................................... 63
Dial 115.2 asyn* .................................................................................................... 64
Fallback 57.6k*...................................................................................................... 64
More....................................................................................................................... 65
Leased 128K.................................................................................................... 65
Ldm 128 Master ............................................................................................. 65
Factory Setup.................................................................................................. 66
Chapter 9. Dial Options ................................................................................................... 67
Dialing Options................................................................................................................... 67
Hang Up Line............................................................................................................... 68
Dial Number................................................................................................................. 68
Redial Last Number .................................................................................................... 68
Answer Call.................................................................................................................. 68
Dial Stored Number .................................................................................................... 68
Store/Review Number ............................................................................................... 69
Chapter 10. Remote Configuration ................................................................................ 71
Remote Configuration ....................................................................................................... 71
Configuring with AT Commands ............................................................................. 71
Configuring and Testing with the Front Panel or
VT 100 Terminal ............................................................................................ 72
Configure Remote Unit............................................................................................... 73
Remote Testing............................................................................................................. 74
Loopback Remote 1B ........................................................................................... 74
Loopback Remote 2B ........................................................................................... 74
Set Password......................................................................................................... 74
Chapter 11. Troubleshooting........................................................................................... 77
If Self Test Fails ................................................................................................................... 77
If The ISU 128 Does Not READ READY......................................................................... 77
Chapter 12. Specifications ............................................................................................... 83
Specifications and Features............................................................................................... 83
Network Interface.......................................................................................... 83
DTE Interface ................................................................................................. 83
Dialing Selections .......................................................................................... 83
Data Rates (Network) ................................................................................... 83
Data Rates (DTE) ........................................................................................... 83
Rate Adaption ................................................................................................ 84
Interoperability .............................................................................................. 84
Switch Compatibility .................................................................................... 84
B Channel Aggregation ................................................................................ 84
Display ............................................................................................................ 84
ISU-128 User Manual 61202.029L2-1
Table of Contents
Environmental ............................................................................................... 85
Physical........................................................................................................... 85
Power .............................................................................................................. 85
Appendix A. AT Commands........................................................................................... 87
Appendix B. Current Status Messages.......................................................................... 93
Appendix C. Status Buffer Messages............................................................................ 97
Appendix D. S-Register List ........................................................................................... 107
Appendix E. Connector Pinouts ..................................................................................... 115
Acronyms ............................................................................................................................ 121
Glossary .............................................................................................................................. 123
61202.029L2-1 ISU 128 User Manual
v
Table of Contents
vi
ISU-128 User Manual 61202.029L2-1
List of Figures
Figure 1-1: ISU 128 Rear Panel ................................................................................ 2
Figure 1-2: ISU 128 Front Panel............................................................................... 3
Figure 1-3: ISU 128 Interoperability........................................................................ 5
Figure 4-1: VT 100 Status Screen ............................................................................. 17
Figure 4-2: VT 100 Configuration Screen............................................................... 18
Figure 5-1: VT 100 Test Screen................................................................................. 19
Figure 5-2: Test Menu Tree ......................................................................................20
Figure 5-3: Loopback Points .................................................................................... 20
Figure 6-1: Dial Line Menu Tree ............................................................................. 23
Figure 6-2: VT 100 Configuration Screen............................................................... 24
Figure 6-3: Configuration Menu Tree..................................................................... 27
Figure 6-4: Dial Options, RS-366 Menu Tree......................................................... 29
Figure 6-5: Dial Options, V.25 bis Menu Tree....................................................... 33
Figure 6-6: Dial Line, Auto Answer Menu Tree ................................................... 34
Figure 6-7: Data Bits Menu Tree.............................................................................. 34
Figure 6-8: V.25 bis ASYNC Menu Tree................................................................. 35
Figure 6-9: Answer Tone Menu Tree...................................................................... 37
Figure 6-10: Connect Timeout Menu Tree............................................................... 38
Figure 6-11: Call Screening Menu Tree .................................................................... 38
Figure 6-12: Leased Line Menu Tree ........................................................................ 40
Figure 6-13: Limited Distance Modem Application............................................... 40
Figure 6-14: Leased Application with Channel Banks........................................... 41
Figure 6-15: Asynchronous DTE Options Menu Tree............................................ 42
Figure 6-16: Synchronous DTE Options Menu Tree ..............................................42
Figure 6-17: Flow Control Menu Tree ...................................................................... 44
Figure 6-18: Data Format Menu Tree ....................................................................... 45
Figure 7-1: Protocol Menu Tree............................................................................... 48
Figure 7-2: BONDING Mode 1 Protocol Menu Tree............................................ 49
Figure 7-3: V.34 Error Control Menu Tree............................................................. 51
Figure 7-4: V.34 Compression Menu Tree .............................................................52
Figure 7-5: V.34 MNP Block Size Menu Tree ........................................................52
Figure 7-6: FALLBACK Menu Tree ........................................................................ 55
Figure 7-7: PPP Menu Tree ...................................................................................... 56
Figure 8-1: Quick Setup Menu Tree........................................................................ 59
Figure 9-1: VT 100 Terminal Dial Options Screen ................................................67
Figure 9-2: Dial Menu Tree ......................................................................................68
61202.029L2-1 ISU 128 User Manual
vii
List of Figures
Figure 10-1: Remote Configuration Menu Path...................................................... 72
Figure 10-2: Remote Configuration Screen.............................................................. 72
Figure 10-3: Remote Unit Configuration Screen..................................................... 73
Figure 10-4: Test Menu Path ......................................................................................74
Figure 10-5: Loopback Remote 1B............................................................................. 75
Figure 10-6: Set Password Screen..............................................................................75
Figure E-1: EIA-232/RS-530 Interface..................................................................... 115
Figure E-2: V.35 Interface.......................................................................................... 117
Figure E-3: RS-366 Interface......................................................................................118
Figure E-4: RJ-45 Interface ........................................................................................118
Figure E-5 Maintenance Port...................................................................................119
viii
ISU 128 User Manual 61202.029L2-1
List of Tables
Table 1-A: DTE Indicators .......................................................................................3
Table 1-B: Recommended Operating Modes ....................................................... 7
Table 3-A: Maximum DTE Interface Cable Lengths............................................ 12
Table 7-A: Rate Adaption Protocols....................................................................... 54
Table E-A: EIA-232 Interface ................................................................................... 115
Table E-B: RS-530 Interface ..................................................................................... 116
Table E-C: V.35 Interface.......................................................................................... 117
Table E-D: RS-366 Interface ..................................................................................... 118
Table E-E: RJ-45 ISDN IFC ...................................................................................... 118
Table E-F: Maintenance Port................................................................................... 119
61202.029L2-1 ISU 128 User Manual
xi
List of Tables
xii
ISU 128 User Manual 61202.029L2-1
Understanding ISDN and the ISU 128
ISDN OVERVIEW
Chapter 1
The Integrated Services Digital Network (ISDN) is a public or private switched
digital network. ISDN is an international standard for digital communications, allowing a full range of enhanced services supporting voice, data, and
image applications through standard interfaces over a single telephone wire.
ISDN provides a means of integrating these services and modernizing communication networks for information movement and management efficiency.
THE ADTRAN ISU 128
The ADTRAN ISU™ 128 is a stand-alone device that connects data terminal
equipment (DTE) to the ISDN network or to a leased digital network for data
transmission. The ISU 128 allows high-speed data transmission (up to 128
kbps) over a single ISDN line. The ISU 128 meets the Microsoft Windows
Plug-an-Play specifications. The file
this file contact our website at URL of www.adtran.com ADTRAN technical
support. The number is located on the inside back cover of this manual.
From the network, ISDN is delivered by a single 2-wire 2B1Q U-interface
which is connected directly to the ISU 128. ISDN network termination is designed into the ISU 128, eliminating the need and expense of a separate NT1.
For network testing, the ISU 128 responds to NT1 test commands from the telephone company central office (CO).
The ISU 128 transmits data over an RS-530, V.35 interface, or EIA-232 interface,
selectable on the front panel. The ISU 128 performs at synchronous data transfer rates of 2400 bps to 128 kbps and asynchronous rates of 300 bps to 115.2
kbps. For speeds over 64 kbps, the industry standard BONDING or MULTILINK PPP protocol aggregates the two 64 kbps B channels for a maximum of
128 kbps. The ISU 128 is intended to support the transfer of data and images
®
95
MDMADTN.INF is required. To obtain
61202.029L2-1 ISU 128 User Manual
1
Chapter 1. Understanding ISDN and the ISU 128
over ISDN. The ISU 128 may be viewed as an ISDN dial modem that allows
cost-effective high-speed data transmission at rates up to 128 kbps.
The ISU 128 has one RJ-45 jack available on the rear panel for network connection (see Figure 1-1). The RJ-45 jack labelled ISDN IFC is for ISDN Basic Rate.
ISDN Basic Rate service divides a standard telephone line into three digital
channels capable of simultaneous voice and data transmission. The three
channels are comprised of two bearer (B) channels at 64 kbps and one data (D)
channel at 16 kbps (2B+D).
The ISU 128 also supports a leased digital connection that allows data to be
transferred at up to 128 kbps over a 2-wire facility using the U-interface jack
labelled
ISDN IFC . This type of service is a permanent connection between
end points and is sometimes referred to as a leased connection, a dedicated
connection, a nailed-up connection, a private circuit, or a limited distance modem connection. These types of service are referred to in this manual as
Leased Line Service.
2
Figure 1-1
ISU 128 Rear Panel
Dialing from the ISU 128 is accomplished in a variety of ways:
• From the front panel
• From up to ten stored numbers
• Through an RS-366 dial port used in facsimile and video conferencing applications
• Over the DTE interface using the AT command set
• With V.25 bis in-band dialing (used in applications such as LAN/WAN
bridging)
ISU 128 User Manual 61202.029L2-1
Chapter 1. Understanding ISDN and the ISU 128
• With DTR asserted, some bridges/routers raise DTR when bandwidth on
their dedicated line is exceeded. In high-traffic times, this allows the ISU
128 to dial out over the ISDN for an extra 128 kbps of bandwidth-on-demand.
The ISU 128 front panel accommodates a 2-line, 16 character LCD display.
Seven LED indicators monitor data flow and display the status of key DTE interface leads as described in Table 1-A. A front panel keypad supports configuration, test modes, test status, and dialing (see Figure 1-2).
ISU 128
RS CS TD RD CD TR SR
ENTER
CANCEL
123
456
789
0
*
#
ISU 128 Front Panel
Indicator Definition
RS Request to Send. Indicates the DTE is ready to transmit.
CS Clear to Send. Indicates the ISU 128 is ready to transmit.
TD Transmit Data. On when the DTE is transmitting to the ISU 128.
RD Receive Data. On when the ISU 128 is receiving data from the far end.
CD Carrier Detect. On when the ISU 128 is connected to a remote unit.
TR Data Terminal Ready from DTE. On when DTR is active at DTE interface.
SR Data Set Ready.
Figure 1-2
Table 1-A
DTE Indicators
61202.029L2-1 ISU 128 User Manual
3
Chapter 1. Understanding ISDN and the ISU 128
ISU 128 INTEROPERABILITY
Telephone networks are evolving from analog technologies to digital technologies such as ISDN. This transition is time-consuming and costly for the telephone companies. Upgrading all locations and facilities is a lengthy process.
The ISU 128 bridges this transition by supporting communications with existing and future network services and equipment. The ISU 128 supports communications with Switched 56 service, Switched 56 DSUs (2-wire and 4-wire),
various ISDN terminal adapters, ISDN terminal equipment, BONDING compatible inverse multiplexers, and analog modems with the optional V.34 modem (part number 1202029L3).
4
Figure 1-3 illustrates the ISU 128 operation in various switched network services and customer premises products.
ISU 128 User Manual 61202.029L2-1
Chapter 1. Understanding ISDN and the ISU 128
DTE
TANT1
ISDN U-Interface
Inverse MUX
BONDING Compatible
4-Wire Switched 56 DSU
NETWORK
ISDN U-Interface ISDN or SW56
*
123
456
789
#0
ENTER
CANCEL
ISU
ISU 128
RS CS TD RD LD TR SR
Video Codec
Data Path
2-Wire Switched 56
*
123
456
789
#0
ENTER
CANCEL
DSU
RS CS TD RD LD TR SR
4-Wire
SW56 DSU
2-Wire
SW56 DSU
*
123
456
789
#0
ENTER
CANCEL
DSU
RS CS TD RD LD TR SR
Figure 1-3
ISU 128 Interoperability
DTE
DTE
DTE
61202.029L2-1 ISU 128 User Manual
5
Chapter 1. Understanding ISDN and the ISU 128
RECOMMENDED OPERATING PROTOCOLS
The ISU 128 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 will support flow control. Flow control is required when
operating at 115,200 bps using PPP (Point-to-Point Protocol), V.120, SAP (Simple Adtran Protocol), or asynchronous bonding.
Table 1-B shows that a given data rate may be achieved by more than one protocol/rate adaption selection. The table is organized so that selections with
the least transport delay are closer to the top of the table for any given circuit
type. Therefore, users should choose a protocol and rate closer to the top of
the protocol rate list for a given circuit type.
6
ISU 128 User Manual 61202.029L2-1
Chapter 1. Understanding ISDN and the ISU 128
Table 1-B
Recommended Operating Modes
Call Type Protocol
DIAL-64K BONDING Sync 56000 64000
Clear Chan Sync 48000 56000 64000
PPP Sync 2400 4800 9600 19200 38400 56000 64000
V.110 Sync 2400 4800 9600 19200 38400
V.120 Sync 9600 19200 38400 48000
Tlink Sync 2400 4800 9600 19200 56000 64000
SAP Sync 38400
PPP async-sync Async 1200 2400 4800 9600 19200 38400 57600 115200
BONDING Async 2400 4800 9600 19200 38400 57600
V.110 Async 1200 2400 4800 9600 19200 38400
V.120 Async 1200 2400 4800 9600 19200 38400 57600 115200
Tlink Async 1200 2400 4800 9600 19200
SAP Async 38400 57600 115200
DIAL-56K BONDING Sync 56000
Clear Chan Sync 48000 56000
PPP Sync 2400 4800 9600 19200 38400 56000
V.110 Sync 2400 4800 9600 19200
V.120 Sync 9600 19200 38400 48000
Tlink Sync 2400 4800 9600 19200 56000
PPP async-sync Async 1200 2400 4800 9600 19200 38400 57600 115200
BONDING Async 2400 4800 9600 19200 38400 57600
DSU 57.6 Async 57600
V.110 Async 1200 2400 4800 9600 19200
V.120 Async 1200 2400 4800 9600 19200 38400 57600 115200
Tlink Async 1200 2400 4800 9600 19200
DIAL-64K*2 BONDING Sync 128000
MPPP Sync 128000
MPPP Async 115200
BONDING Async 115200
DIAL-56K*2 BONDING Sync 112000
MPPP Sync 112000
MPPP Async 115200
BONDING Async 115200
LEASED 64K Clear Chan Sync 48000 56000 64000
SAP Sync 2400 4800 9600 19200 38400
DSU 57.6 Async 57600
SAP Async 1200 2400 4800 9600 19200 38400 57600
LEASED 128K Clear Chan Sync 128000
SAP Async 57600
Sync/
Async
f
f
f
f
f
115200
f
1. All asynchronous rates support flow control.
2. All dial-up modes support front panel, DTR, RS-366, AT command, and V.25 bis 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. Multilink PPP supports the same rates as single-link PPP async-sync. Use the recom-
mended rates for PPP async-sync.
Rates Supported (bps)
f
f
v
f
115200
f
f
f
f
61202.029L2-1 ISU 128 User Manual
7
Chapter 1. Understanding ISDN and the ISU 128
8
ISU 128 User Manual 61202.029L2-1
ISDN Ordering Codes (IOCs)
ORDERING ISDN USING IOCS
Chapter 2
The development of ISDN ordering codes (IOCs) simplifies the process of ordering ISDN service. The ISDN Solutions Group, a consortium of ISDN equipment vendors, service 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. Of
these, four are recommended for operation of the ISU 128. After reviewing
the following list, order ISDN lines from the local service provider. Request
the appropriate IOC for your application. They are described in detail in this
chapter.
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 application,
cost-effective.
If these are not available from your service provider or you would like more
information regarding ordering ISDN see the ADTRAN document Ordering
ISDN Service User Guide part number 60000.015-8 or contact your telephone
company for alternative line configurations. The Ordering ISDN Service User
Guide is available on the ADTRAN home page at http://www.adtran.com or
by calling ADTRAN.
Capability R (previously Generic Data I ) may be more
61202.029L2-1 ISU 128 User Manual
9
Chapter 2. ISDN Ordering Codes (IOCs)
ADTRAN has registered the following ISDN ordering codes to support a variety of tariffs and applications:
Capability S
• 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
10
Capability R
• 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
Capability B
• 1B service
• Data only
• One directory number
•
Capability C
• 1B service
• Alternating voice and data
• One directory number
ISU 128 User Manual 61202.029L2-1
After unpacking the unit, immediately inspect it for possible shipping damage. If damage is discovered, file a claim immediately with the shipping carrier, then contact ADTRAN Repair and Return Department (see the end of this
manual).
Ensure that a grounded, 115 VAC, 60 Hz receptacle is used to provide power.
NETWORK CONNECTION
The ISU 128 supports either dial or leased operation. An eight-pin RJ-45 modular jack labelled ISDN IFC on the rear panel allows connection to ISDN Basic
Rate Service provided by the telephone company or to a leased type of service.
Dial operation uses the ISDN Basic Rate U-interface and allows the ISU 128 to
dial out over the ISDN network. The Leased Line Service can be dedicated
2B1Q data service or a nailed-up circuit (twisted pair) that provides a dedicated connection between end points such as a limited distance modem or pointto-point connection. When using the ISU 128 in either of these types of service,
connect the network interface to the RJ-45 connector labelled ISDN IFC.
See the appendix Connector Pinouts for network connection pin assignments.
Chapter 3
Installation
61202.029L2-1 ISU 128 User Manual 11
Chapter 3. Installation
DTE DATA CONNECTION
Data terminal equipment is connected to the ISU 128 by using either the RS530 interface, the V.35 interface, or EIA-232 interface on the rear panel of the
ISU 128. The maximum recommended cable lengths are shown in Table 3-A.
See the appendix Connector Pinouts for each interface pin assignments. Be sure
to configure the menu option for the connector type used in your application.
Refer to the section DTE Options for Asynchronous and Synchronous Operation in
Chapter 6 to configure the connector type.
The RS-530 interface and the V.35 interface support data rates up to 128 kbps.
The DTE rate is configured from the front panel of the ISU 128 or by using AT
commands. See the chapter Configuration to configure the ISU 128 with the appropriate data rates.
Table 3-A
Maximum DTE Interface Cable Lengths
DTE Interface Max Cable Length
RS-530 50 feet
V.35 30 feet
EIA-232 15 feet
To prevent possible radio frequency interference emissions, a shielded V.35
cable is required.
DIAL INTERFACE CONNECTION
If out-of-band RS-366 dialing is required for applications such as videoconferencing or FAX machines, the dialing interface of the host DTE should be connected to the dial port marked RS-366/Maintenance. Pin assignments for the
RS-366 connector are listed in the appendix Connector Pinouts.
12 ISU 128 User Manual 61202.029L2-1
MAINTENANCE INTERFACE
The Maintenance Interface is available at 9600 bps, 8 data bits, no parity, asynchronous format, through the RS-366/Maintenance port. See the appendix
Connector Pinouts for Maintenance port pin assignments. The VT 100 terminal
or null modem can be connected to the RS-366/Maintenance port using an
EIA-232 cable. This interface can be used to set internal S-registers, dial ISDN
connections, and disconnect calls. This port also allows ADTRAN Technical
Support personnel to retrieve vital information from the unit if a problem is
encountered during initial configuration of the ISU 128. Most problems can be
solved without resorting to this port for assistance.
In order to activate the Maintenance port, ensure the dial mode is either Front
Panel or AT commands. When the dial mode is set for RS-366, the Maintenance port is disabled.
The Maintenance port cannot be used to pass data or to remotely configure another
ISU 128 using the Cfg. Rmt. Unit option.
AT commands sent to the Maintenance port are not preceeded by "AT."
Example: To display the unit model number, enter: I0
Chapter 3. Installation
61202.029L2-1 ISU 128 User Manual 13
Chapter 3. Installation
14 ISU 128 User Manual 61202.029L2-1
MENU NAVIGATION
Four function keys on the left-hand side of the keypad allow the user to enter,
exit, and scroll through the various menu branches. The four function keys are
defined below.
Enter Enters the selected item.
Up Arrow Scrolls up a menu tree.
Down Arrow Scrolls down a menu tree.
Cancel Exits (back one level) from the current branch of
For reading ease, function keys are represented in bold, initial caps text. Selectable
menu items and messages displayed on the LCD are represented in bold type as they
appear on the LCD.
Chapter 4
Operation
the menu tree.
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 that it is selected and has been stored in non-volatile memory. 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 128 do not immediately
take effect upon selection. This prevents unintentional reconfiguration of the
ISU 128 during an active call. Leased/Dial Line, and ISDN Switch Protocl,
take effect only when the ISU is powered up or the U-interface is bounced (line
broken and restored). To ensure the ISU is actually performing as configured,
cycle the power off, then back on again, after these items are changed. Also,
items such as Bit Rate, Protocol, and Call Type take effect only at the beginning of a new call.
61202.029L2-1 ISU 128 User Manual 15
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