ADTRAN ISU 128 User Manual
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ADTRAN ISU 128 User Manual

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61202.029L2-1D
January 1998
ISU 128
128 kbps ISDN Service Unit
USER MANUAL
Part Numbers
1202029L2
1202029L3
115 VAC
115 VAC with V.34 Modem Option

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  • Page 1 128 kbps ISDN Service Unit 1202029L2 1202029L3 61202.029L2-1D January 1998 ISU 128 USER MANUAL Part Numbers 115 VAC 115 VAC with V.34 Modem Option...
  • Page 2 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.
  • Page 3 FCC regulations require that the following information be provided to the custom- er 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.

  • Page 4: Federal Communications Commission

    • 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.

  • Page 5: Canadian Emissions Requirements

    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,"...

  • Page 6: 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 ...
  • Page 7 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) ...
  • Page 8 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 ...
  • Page 9 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 ...
  • Page 10 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 Table of Contents...
  • Page 11 Table of Contents ISU-128 User Manual 61202.029L2-1...

  • Page 12: 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...
  • Page 13 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...

  • Page 14: List Of Tables

    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 List of Tables ISU 128 User Manual...
  • Page 15 List of Tables ISU 128 User Manual 61202.029L2-1...

  • Page 16: Chapter 1. Understanding Isdn And The Isu 128

    For speeds over 64 kbps, the industry standard BONDING or MULTI- LINK 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 61202.029L2-1...
  • Page 17 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 connec- tion (see Figure 1-1).

  • Page 18: Table 1-A: Dte Indicators

    Clear to Send. Indicates the ISU 128 is ready to transmit. Transmit Data. On when the DTE is transmitting to the ISU 128. Receive Data. On when the ISU 128 is receiving data from the far end. Carrier Detect. On when the ISU 128 is connected to a remote unit.

  • Page 19: Isu 128 Interoperability

    Upgrading all locations and facilities is a lengthy process. The ISU 128 bridges this transition by supporting communications with exist- ing and future network services and equipment. The ISU 128 supports com- munications with Switched 56 service, Switched 56 DSUs (2-wire and 4-wire), various ISDN terminal adapters, ISDN terminal equipment, BONDING com- patible inverse multiplexers, and analog modems with the optional V.34 mo-...
  • Page 20 Chapter 1. Understanding ISDN and the ISU 128 61202.029L2-1 ISU 128 User Manual...

  • Page 21: Recommended Operating Protocols

    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.

  • Page 22: Table 1-B: Recommended Operating Modes

    Given a choice between two protocols, pick the protocol closer to the top of the list. Multilink PPP supports the same rates as single-link PPP async-sync. Use the recom- mended rates for PPP async-sync. 61202.029L2-1 Chapter 1. Understanding ISDN and the ISU 128 Recommended Operating Modes Rates Supported (bps) 64000...
  • Page 23 Chapter 1. Understanding ISDN and the ISU 128 ISU 128 User Manual 61202.029L2-1...

  • Page 24: Chapter 2. Isdn Ordering Codes (Iocs)

    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.

  • Page 25: Capability S

    Chapter 2. ISDN Ordering Codes (IOCs) ADTRAN has registered the following ISDN ordering codes to support a va- riety of tariffs and applications: Capability S • 2B service • Both B channels alternating voice and data • Two directory numbers Applications •...

  • Page 26: Chapter 3. Installation

    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...

  • Page 27: Dte Data Connection

    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 ap- propriate data rates.

  • Page 28: Maintenance Interface

    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.
  • Page 29 Chapter 3. Installation ISU 128 User Manual 61202.029L2-1...

  • Page 30: Chapter 4. Operation

    Press En- ter 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.

  • Page 31: Getting Started

    For example, if the ISU 128 is not connected to the network, the Current Status menu displays ADTRAN ISU 128 Link Down. If the unit is connected to the network and functioning properly, it displays ADTRAN ISU 128 Ready.

  • Page 32: Vt 100 Terminal Menu Support

    When connected to an asynchronous VT 100 terminal or VT 100 terminal em- ulator, use the built-in ISU 128 menu system for configuration. To enter into the menus, type AT!V Enter. To go to a particular menu, simply press the hot keys for that menu.

  • Page 33: Configuration Screen

    See the chapter Configuration for- more information about configuring the ISU 128. To configure the ISU 128 quickly and easily for most applications, see the chapter Quick Setup. VT 100 Configuration Screen...

  • Page 34: Chapter 5. Testing

    Figure 5-1 shows the VT 100 terminal test screen and the menu tree is illustrated in Figure 5-2. Figure 5-1 VT 100 Test Screen 61202.029L2-1 ISU 128 User Manual...

  • Page 35: Loopback Dte

    Loopback DTE Loopback DTE causes the ISU DTE port to loop back toward user equipment. This allows performance of a bit error rate test (BERT) between the ISU 128 and the end user equipment to verify proper cable connection. Loopback Network Loopback Network forces the ISU 128 to loopback both the B1 and B2 chan- nels toward the network.

  • Page 36: Loopback Remote

    Loopback Remote 1B and 2B are only used with the DTE set to asynchronous. Test Remote Test Remote allows the ISU 128 to issue a V.54 in-band loopback command to a far-end unit and BERT the link using a built-in 2047 pattern generator/ checker.

  • Page 37: Dds+V54 Accept

    Chapter 5. Testing DDS+V54 Accept The ISU 128 responds to both DSU Latching Loopback commands (leased line mode only) and V.54 loopback commands. The ISU must be optioned for Clear Channel operation for DSU Latching and V.54 loopback commands to take effect.

  • Page 38: Chapter 6. Configuration

    DIAL LINE OPERATION This section explains how to configure the ISU 128 when using ISDN basic rate switched service. Figure 6-3 illustrates the entire CONFIG branch of the 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, and call screening.

  • Page 39: Switch Protocol

    The Speech option is used with an ISDN line configured for voice service. In some areas voice service costs VT 100 Configuration Screen ® ® , AT&T 5ESS switch, or a switch ISU 128 User Manual Figure 6-2 61202.029L2-1...

  • Page 40: Audio

    For instance, a point-to-point line has no SPID. Multipoint lines may have one or two SPIDs. The ISU 128 uses the presence of SPID 1 to deter- mine if the line is multipoint. If the line has only one SPID, then it must be en- tered in SPID 1.

  • Page 41: Setting The Ldn

    To cancel a number, use the Down arrow to backspace through it and press Enter. Press Enter after entering each LDN. To abort changes at any time, press Cancel. ISU 128 User Manual 61202.029L2-1...
  • Page 42 1=Hang up line 4=Loopback remote 2B 2=Dial number 3=Redial last # 4=Answer Call 5=Dial Stored # 6=Store/Review # ISU 128 User Manual Chapter 6: Configuration 1=1 sec or EON 2=2 sec or EON 1=V.25 HDLC 3=5 sec (default) 2=V.25 ASYNC 4=10 sec or EON 3=V.25 BISYNC...
  • Page 43 Chapter 6: Configuration ISU 128 User Manual...

  • Page 44: Dial Options

    Dial options The ISU 128 can be configured to dial using the Front Panel, RS-366 port, AT Commands, or V.25 bis Commands. Figure 6-4 illustrates the menu tree. Front Panel To establish and disconnect calls from the front panel keypad, configure Dial options for Front Panel.

  • Page 45: Sec Or Eon

    DTE interface using asynchronous AT commands. AT commands can be used to set up the ISU 128 as well as establish and end a call. Calls can be discon- nected from the front panel (as previously described) or from the far-end unit.

  • Page 46: Using At Commands

    Once the command mode is entered, AT commands can be transmitted to the ISU 128 to configure most of the options, dial remote DSUs, or initiate tests to check both the ISU 128 and the network connections. All command lines must begin with the AT character set in either capital or lower case letters and end with a terminating character.

  • Page 47: Reading S-Registers

    ATS0? Reading S-Register Strings The ISU 128 uses S-register strings to store strings of digits for stored phone numbers, SPIDs, etc. Type ATSS followed by the number of the string S-reg- ister to be read followed by a question mark and press Enter.

  • Page 48: V.25 Bis

    V.25 bis Configuring the ISU 128 for V.25 bis (see Figure 6-5) enables in-band dialing over a DTE interface using asynchronous or synchronous 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 previously described) or from the far-end unit.

  • Page 49: V.25 Async Dialing

    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 128 allows the data, parity, and stop bits as defined under Data bits. (See Figure 6-7.) 1=Netw.

  • Page 50: V.25 Sync Hdlc Dialing

    This setting allows synchronous DTE which does not use HDLC to support serial in-band dialing. V.25 HDLC FLAG Configuring the ISU 128 for HDLC FLAG V.25 bis enables in-band dialing over a DTE interface using standard synchronous HDLC V.25 bis commands with 0x7E hex idle.

  • Page 51: Auto Answer

    Chapter 6. Configuration Auto Answer The ISU 128 auto answer parameter can be configured in one of three ways: Disabled, Enabled, or Dump all calls. Disabled When Disabled is selected, the ISU 128 will not automatically answer an in- coming call. The AT answer command (ATA) must be issued to the ISU 128 before it accepts the incoming call.

  • Page 52: Answer Tone

    Chapter 6. Configuration 1=Switch protocl 2=Call type 1=Dial Line 3=Terminal ID 2=Leased Line 4=Dial options 5=Auto answer 6=Answer tone 7=Connect Timout 8=Call Screening Answer Tone Menu Tree ISU 128 User Manual 1=No answer tone 2=Incoming tone 3=Outgoing tone 4=Always tone Figure 6-9...

  • Page 53: Connect Timeout

    Chapter 6. Configuration Connect Timeout Connect Timout sets the length of time that the ISU 128 waits for a far-end unit to answer an outgoing call. These choices are illustrated in Figure 6-10. 1=Netw. options 3=CONFIG 2=DTE options 3=Protocol 4=Quick setup...
  • Page 54 Place a call to the ISU 128 with the stored number to determine whether it answers properly. If the ISU 128 does not answer the call, look at the Call ID message in the Status buffer. An explanation of Status buffer messages is located in the appendix Status Buffer Messages.

  • Page 55: Leased Line Service

    Chapter 6. Configuration LEASED LINE SERVICE This section explains how to configure the ISU 128 when using a 2B1Q leased digital service or a service that provides a permanent connection between end points. Figure 6-12 illustrates the menu tree for setting leased line.

  • Page 56: Channel Rate

    ISU 128 Channel Rate In Leased Line operation, the data rate for the ISU 128 can be configured for 64 kbps or 128 kbps. When 64 kbps is selected, only one bearer channel (B1) is used. When 128 kbps is selected both bearer channels (B1 and B2) are used.

  • Page 57: Dte Options

    8=Flow Control 9=Data Format Asynchronous DTE Options Menu Tree 1=Bit Rate 2=Connector Type 3=RTS Options 4=CTS Options 1=Asynchronous 5=CD Options 2=Synchronous 6=DTR Options 7=DSR Options 8=Transmit Clock Synchronous DTE Options Menu Tree ISU 128 User Manual Figure 6-15 Figure 6-16 61202.029L2-1...

  • Page 58: Connector Type

    Connector Type The ISU 128 can provide an EIA-232, RS-530, or V.35 interface to a DTE by se- lecting the desired connector type. RTS Options Selecting 1 MS delay causes the Clear-to-Send (CTS) signal to change states 1 millisecond after the DTE Ready-to-Send (RTS) signal changes state. The 18 MS delay causes the CTS signal to change state 18 milliseconds after the DTE RTS signal changes state.

  • Page 59: Dsr Options

    Link Down causes DSR to be disasserted if the network interface is disrupted. Flow Control (Asynchronous Data Format) Selecting Hardware Flow (as shown in Figure 6-17) causes the ISU 128 re- ceived data to be presented to the DTE interface only when RTS is asserted.

  • Page 60: Data Format (Asynchronous)

    5=Remote config Transmit Clock (Synchronous Data Format) Selecting the Normal option causes the ISU 128 to be the synchronous DTE in- terface transmit timing source. Transmit data is timed from the transmit clock provided by the ISU 128 on the DTE connector. Normal clock is the normal mode of operation for the ISU 128.
  • Page 61 Chapter 6. Configuration ISU 128 User Manual 61202.029L2-1...

  • Page 62: Chapter 7. Protocol Options

    Communicating between such diverse types of equipment requires the use of various rate adaptation protocols to support various bit rates and DTE settings. Figure 7-1 illustrates the menu tree for set- ting protocol options. The ISU 128 supports the following rate adaptation pro- tocols: •...

  • Page 63: Clear Channel

    56 kbps, 64 kbps, 112 kbps, and 128 kbps. BONDING Mode 1 The BONDING mode 1 protocol allows the ISU 128 to communicate at bit rates in excess of 64 kbps to a maximum of 128 kbps. BONDING provides high-speed communication between ISU 128s, ISDN TE/TAs, and inverse multiplexing equipment supporting the BONDING protocol.

  • Page 64: Txinit

    Chapter 7. Protocol Options 1=TXINIT 2=TXFA 1=Clear Channel 3=TXADD01 2=BONDING mode 1 4=TXDEQ 3=V.120 5=TANULL 4=V.34 6=TCID 5=V.110 7=BONDING Method 1=ADTRAN Only 6=DSU 57.6 ASYNC 7=T-LINK 8=SAP 9=FALLBACK 0=PPP asyn-sync BONDING Mode 1 Protocol Menu Tree ISU 128 User Manual 2=Multivendor Figure 7-2...

  • Page 65: V.120

    V.120 The V.120 protocol is a CCITT compliant rate adaption method which pro- vides DTE service between the ISU 128 and other V.120 compliant devices at rates less than the 64 kbps ISDN bearer channel rate. V.120 supports synchro- nous and asynchronous DTE rates. See the section Recommended Operating Modes and Table 1-B in Chapter 1 for available V.120 rates.

  • Page 66: V.110

    MNP then the call is terminated. When Auto-Rel MNP is select- ed, the ISU 128 attempts to use MNP error control. If the far end does not use MNP then normal operation is used. Force LAPM allows only LAPM (V.42) error corrected calls to connect.

  • Page 67: Compression

    Chapter 7. Protocol Options Compression No Compression turns off the MNP5 compression algorithms in the ISU 128. Compress MNP5 enables MNP5 data compression. Compress V42 enables V.42 bis data compression. Compress V42/MNP5 allows the 128 to negotiate MNP5 or V.42 bis compression.

  • Page 68: Dsu 57.6 Async

    Simple ADTRAN Protocol (SAP) Simple ADTRAN Protocol (SAP) is a rate adaption method providing DTE service between ISU 128 units at a sub 64 kbps ISDN bearer channel rate. Se- lecting this menu item causes the ISU 128 to use SAP protocol.

  • Page 69: Fallback

    FALLBACK supports the following protocols based on the call type: BOND- ING Mode 1, V.120, T-Link, and V.34. When answering calls, the ISU 128 uses the incoming call type to determine which rate adaption protocols to support. See Table 7-A for the call type and the supported rate adaption protocols.
  • Page 70 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 128 attempts an- other call at 56k call type. If connection is made at 56k, then V.120, T-Link, and PPP are attempted.

  • Page 71: Point-To-Point (Ppp) Async-To-Sync

    When the ACCM option is seen in a configure ACK link con- trol packet, it is adopted by the ISU 128. In addition, when the ACCM option is not seen in the configure-request packet from the network, the ISU 128 adds it to the packet.

  • Page 72: Ppp With Compression

    2=Multilink PPP or by setting S-register S27 to a value of 1. In this mode, the ISU 128 dials a second number to establish a second point-to-point link. Once the second link is established, multilink PPP is performed over both B-channels.
  • Page 73 Chapter 7. Protocol Options ISU 128 User Manual 61202.029L2-1...

  • Page 74: Chapter 8. Quick Setup

    3=Dial 112K sync 4=Dial 128K sync 5=Dial PPP 6=V34 115.2 async 1=Leased 128k 7=Dial 57.6 asyn 2=Ldm 128 Master 8=Dial 115.2 asy 3=TBD 9=Fallback 57.6k 4=TBD 0=More 5=TBD 6=TBD 7=TBD Quick Setup Menu Tree ISU 128 User Manual Figure 8-1...

  • Page 75: Quick Setup

    Chapter 8. Quick Setup Quick Setup To assist in configuring the DTE options for the ISU 128, ten common config- urations are preset in Quick Setup. These include: • Synchronous dial operation for 56, 64, 112, and 128 kbps •...

  • Page 76: Dial 64K Sync

    Dial 64K sync* When the ISU 128 is configured for Dial 64K sync service the following pa- rameters are automatically preset: Service type... ISDN dial line Automatic answering ... Enabled ISDN call type ... 64 kbps data Data protocol ... Clear Channel DTE mode ...

  • Page 77: Dial 128K Sync

    Chapter 8. Quick Setup Dial 128K sync* When the ISU 128 is configured for Dial 128K sync service, the following pa- rameters are automatically preset: Service type... ISDN dial line Automatic answering ... Enabled ISDN call type ... 64 kbps data Data protocol ...

  • Page 78: V34 115.2 Async

    Error Control ... Auto-reliable Compression... Compress V42/MNP5 MNP block size ... 256 bytes This option is only used with the ISU 128 with V.34 modem option (part numbers 1202029L3). Dial 57.6 asyn* When the ISU 128 is configured for Dial 57.6 asyn service, the following pa- rameters are automatically preset: Service type...

  • Page 79: Dial 115.2 Asyn

    Chapter 8. Quick Setup Dial 115.2 asyn* When the ISU 128 is configured for Dial 115.2 asyn service, the following pa- rameters are automatically preset: Service type... ISDN dial line ISDN call type ... 64 kbps data Data Protocol ... BONDING mode 1 DTE mode ...

  • Page 80: More

    Transmit data clock ... Normal clock source Ldm 128 Master When the ISU 128 is configured for a point-to-point application such as a lim- ited distance modem (LDM) arrangement, the Ldm 128 Master option auto- matically presets the following parameters: Service type...

  • Page 81: Factory Setup

    Chapter 8. Quick Setup Factory Setup This option restores the ISU 128 to the factory default setup: Service type...ISDN dial line ISDN switch protocol ...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...

  • Page 82: Chapter 9. Dial Options

    VT 100 terminal dial options screen (Figure 9-1) by pressing Ctl-D from any screen. The dial options are only available when the ISU is configured for Dial Line operation (not Leased Line). Figure 9-1 VT 100 Terminal Dial Options Screen 61202.029L2-1 ISU 128 User Manual...

  • Page 83: Hang Up Line

    Press Enter to dial the number and save as stored number 9 (SN9) for redial purposes. 1=Hang up line 2=Dial number 3=Redial last # 4=Answer Call 5=Dial stored # 6=Store/Review # ISU 128 User Manual Figure 9-2 Dial Menu Tree 61202.029L2-1...

  • Page 84: Store/Review Number

    Press Enter to save the number and exit. Press Cancel to exit with- out changing the number. The Dial Options Menu must be exited after dialing in order for CD (carrier detect) to be activated. 61202.029L2-1 Chapter 9. Dial Options ISU 128 User Manual...
  • Page 85 Chapter 9. Dial Options ISU 128 User Manual 61202.029L2-1...

  • Page 86: Chapter 10. Remote Configuration

    The remote unit sends response back to the local unit which then sends the response out of the DTE interface connec- tor. See the appendices AT Commands and S-Registers of the ISU 128 manual for a complete list of commands.

  • Page 87: Configuring And Testing With The Front Panel Or

    Rmt. Unit. The Remote Configuration screen appears as shown in Figure 10-2. 1=Netw. options 2=DTE options 3=Protocol 4=Quick setup 5=Remote config 1=Cfg. Rmt. Unit 2=Set Password 3=Loopback remote 1B 4=Loopback remote 2B Remote Configuration Menu Path Remote Configuration Screen ISU 128 User Manual Figure 10-1 Figure 10-2 61202.029L2-1...

  • Page 88: Configure Remote Unit

    Menu screen and display remote information as if the remote unit were connected to the VT 100 terminal. Figure 10-3 illustrates the terminal screen when connected to a remote ISU 128. The call may be terminated by se- lecting Hang up line from the Dial menu.

  • Page 89: Remote Testing

    If passwords do not match, the remote configuration fails to 1=Loopback DTE 2=Loopback Netw. 3=Loopback Proto 4=Loopback Remote 5=Test Remote 6=Lpbk Disable 7=NEBE/FEBE 0=Software Ver ISU 128 User Manual Figure 10-4 Test Menu Path 61202.029L2-1...

  • Page 90: Figure 10-5: Loopback Remote 1B

    Type the six digit (or less) password, then press Enter. To clear the existing password, do not enter numbers for Set Password. Just press enter. 61202.029L2-1 Chapter 10. Remote Configuration Loopback Remote 1B Set Password Screen ISU 128 User Manual Figure 10-5 Figure 10-6...
  • Page 91 Chapter 10. Remote Configuration ISU 128 User Manual 61202.029L2-1...

  • Page 92: Chapter 11. Troubleshooting

    See the back of this manual for phone numbers. IF THE ISU 128 DOES NOT READ READY When the ISU 128 has been set up and connected to an ISDN line but the front panel does not read Ready after a few minutes, use the following trouble- shooting procedure: Cycle power on the ISU 128, leaving it off for a minimum of two seconds.
  • Page 93 ISDN line. The phone service provider should be able to help. If the ISU 128 continues to read Link Down, there is a physical problem with the ISDN phone line (more than likely, a problem with the Layer 1 setup).
  • Page 94 G. With the ISU 128 connected to the ISDN line and powered 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 ISDN line.
  • Page 95 CONFIG, Netw. options, Dial line, Switch protocl. B. Ensure the ISDN line is multipoint. C. Make sure that the ISU 128 is set up with the correct SPID and LDN by selecting CONFIG, Netw. options, Dial Line, Terminal ID, SPID/LDN.
  • Page 96 B. Ensure that the ISU 128 is set up with the correct SPID and LDN by selecting CONFIG, Netw. options, Dial Line, Terminal ID, SPID/LDN. 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.
  • Page 97 Chapter 11. Troubleshooting E. With the ISU 128 connected to the line and powered up, talk to your 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).

  • Page 98: Chapter 12. Specifications

    Front panel manual dialing Data Rates (Network) 64 kbps (one B channel), 128 kbps (two B channels) Data Rates (DTE) • 300 bps to 115.2 kbps asynchronous • 2400 bps to 128 kbps synchronous 61202.029L2-1 Chapter 12 Specifications ISU 128 User Manual...

  • Page 99: Rate Adaption

    Transmit Data. On when the DTE is transmitting to the ISU 128. Receive Data. On when the ISU 128 is receiving data from the far end. Carrier Detect. On when the ISU 128 is connected to a remote unit. ISU 128 User Manual...

  • Page 100: Environmental

    Relative Humidity: Up to 95%, non-condensing Physical • Dimensions: 2.25"H x 8.75"W x 11.00"D • Weight: 3 lbs. Power • 115 VAC, 60 Hz, 8 W maximum dissipation (part numbers 1202029L2 and 1202029L3) 61202.029L2-1 Chapter 12. Specifications ISU 128 User Manual...
  • Page 101 Chapter 12. Specifications ISU 128 User Manual 61202.029L2-1...

  • Page 102: Appendix A. At Commands

    This appendix lists the supported AT commands and describes their functions. Command Function Answer. Puts the ISU 128 in answer mode. Dial. Precedes the telephone access number [ATD5551212]. Hang up. Disconnects the current call. On-line. Commands the unit to go back on line.
  • Page 103 Number 1. Read far-end phone number 1 if service subscribed from telephone company. &N1 Number 2. Read far-end phone number 2 if service subscribed from telephone company. DTE Data Type Options &Q0 DTE is async &Q1 DTE is sync ISU 128 User Manual 61202.029L2-1...
  • Page 104 Unit Identification Identify unit. Commands the unit to display model number. Identify software. Commands the unit to display software version. AT Command Response Message Options Response messages on Response messages off 61202.029L2-1 Appendix A. AT Commands ISU 128 User Manual...
  • Page 105 DMS-100 National ISDN-1 ISDN U-Interface Operational Mode Options ISU timing slaves to network (NT) ISU is U-interface timing master (LT) Data Flow Control Options No flow control Software CTS only Hardware Software from DCE only ISU 128 User Manual 61202.029L2-1...
  • Page 106 V.34 Compression Block Size Options MNP 64 byte blocks MNP 128 byte blocks MNP 192 byte blocks MNP 256 byte blocks V.34 Operational Mode Options MNP Normal MNP Direct Reliable Auto-reliable Force LAPM Force MNP 61202.029L2-1 Appendix A. AT Commands ISU 128 User Manual...
  • Page 107 Appendix A. AT Commands ISU 128 User Manual 61202.029L2-1...

  • Page 108: Appendix B. Current Status Messages

    ISDN network. Messages with lower case letters are generated by the ISU 128. AT&T-5ESS Ready The ISU 128 is connected to an AT&T 5ESS switch and is ready to place/re- ceive calls. Call Connect B1 Bearer channel 1 has been connected and is now active.
  • Page 109 NEC Ready The ISU 128 is connected to an NEC switch and is ready to place/receive calls. NET EOC LOOPBACK The ISU 128 has been commanded to perform an ISDN loopback toward the network.
  • Page 110 DSTOP DSU 57.6 async rate adaption protocol. FALLBACK FALLBACK rate adaption protocol. Point-to-point protocol. Simple ADTRAN protocol. TLINK TLINK rate adaption protocol. V110 V.110 rate adaption protocol. V120 V.120 rate adaption protocol. V.34 modem (optional). 61202.029L2-1 ISU 128 User Manual...
  • Page 111 Appendix B. Current Status Messages ISU 128 User Manual 61202.029L2-1...

  • Page 112: Appendix C. Status Buffer Messages

    ISDN network. Messages with lower case letters are generated by the ISU 128. Answer 1/2 The ISU 128 answered a call on either the first or second channel. The calling phone number is displayed if available. ACCESS_INFO_DISCARDED The network was unable to deliver access information to the far end.
  • Page 113 The called number is busy. CallID 1 in use ISU 128 tried to place a call using SPID 1 though SPID 1 was already in use. CallID 2 in use ISU 128 tried to place a call using SPID 2 though SPID 2 was already in use.
  • Page 114 DEST_OUT_OF_ORDER The called number is out of order. Dial 1/2 The ISU 128 placed a call on either the first or second channel. The number called is displayed following the message. Disconnect 1/2 The call on either the first or second channel was disconnected from the net- work.
  • Page 115 The DTE equipment is not optioned for the same bit rate as the ISU 128 for V.25 bis dialing. DTR not up ISU 128 tried to place a call in a dialing mode that requires DTR to be in an ac- tive state but it is not. Dump call ISU 128s could not accept an incoming call because it was already involved in a call.
  • Page 116 FlowCtl required Bonding negotiation determined that flow control needs to be optioned on. Hangup 1/2 The call on either the first or second channel was disconnected by the ISU 128. The far-end phone number is also displayed. InCmptblFound TLINK end-to-end negotiations found an optioning incompatibility between the two end units.

  • Page 117: Network Busy

    Mandatory information element missing. Need 2 B chan The DTE bit rate requires the BONDING protocol. Need 64K call The BONDING protocol requires the ISU 128 to be configured for a 64k data call type. Negotiation fail The BONDING negotiation has failed.
  • Page 118 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 product (asynchronous rates can only be supported between two ADTRAN ISU prod- ucts). RESP_TO_STAT_ENQ Response to status enquiry.
  • Page 119 Both ends Bad Synchronization. TAINIT expired Bonding timer TAINIT expired. TANULL expired Bonding timer TANULL expired, non-BONDING equipment attempted to call into the ISU 128 while optioned for BONDING. TEMPORARY_FAILURE The network has temporarily failed, try the call again. TIMER_EXPIRY Call control error.
  • Page 120 User issued an unknown AT command. UNSPECIFIED_CAUSE Received a cause message from the network that is not understood. Unsupported baud The ISU 128 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.
  • Page 121 Appendix C. Status Buffer Messages ISU 128 User Manual 61202.029L2-1...

  • Page 122: Appendix D. S-Register List

    Determines which key or character (in ASCII code) CHARACTER advances the cursor to the next line after ending a command line or after an ISU 128 message. The standard character is the line feed (ASCII value of 10 decimal). Range = 0 to 127...
  • Page 123 8 = DSU 57.6 Async (default) 9 = PPP asyn-syn ESCAPE TIME Determines the delay required immediately before and after entering the escape command for the ISU 128 to recognize and execute the command. Range = 0 to 127 MISC BITS Miscellaneous bits (bit 8 is most significant bit).
  • Page 124 1= CD is active during a call (normal operation) 2= Off with LOCD S34 DTE DTR Determines how the ISU 128 responds to changes in DTR. This is a bit-mapped register. 0= Ignore DTR. 1= Force AT command mode when DTR is off...
  • Page 125 1 = Direct error control, no error control. Does not allow 2 = Reliable MNP error control. If the far end does 3 = Auto-reliable MNP error control . The ISU 128 4 = Force LAPM. Force the modem to connect only 5 = Force MNP.
  • Page 126 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 128 also has timer constraints for completing non-BONDING para- meter negotiation.
  • Page 127 PROTOCOL Rate adaption protocol type. TYPE 1 = Clear Channel (no rate adaption) 2 = BONDING mode 1 3 = SAP (simple ADTRAN protocol) 4 = T-link 5 = V.110 6 = V.120 7 = V.34 9 = DSU 57.6 kbps asynchronous...
  • Page 128 Allows an ISU 128 optioned as a leased line unit to DDS TEST respond to DDS in-band latching loopback or V.54 loopback commands. 0 = No checking 1 = Check for DDS latching loopbacks 2 = Check for v.54 loopbacks 3 = Check for V.54 and DDS latching loopbacks...
  • Page 129 12= Software flow. XON/OFF controls DTE and DCE. DTE CLOCK Selects DTE connector transmit clock timing source. 0 = Internal (ISU 128 supplies timing) 1 = External (DTE supplies timing) The following are the string locations for stored numbers 0 - 9.

  • Page 130: Appendix E. Connector Pinouts

    No Connection External Transmit Clock No Connection I= Input, O= Output, N/A= Not Applicable 61202.029L2-1 Connector Pinouts PIN 13 PIN 1 FEMALE PIN 25 PIN 14 EIA-232/RS-530 Interface Description ISU 128 User Manual Appendix E Figure E-1 Table E-A EIA-232 Interface...

  • Page 131: Rs-530 Interface

    Transmit Clock Receive Data (return) Receive Clock No Connection Request To Send (return) Data Terminal Ready No Connection Data Set Ready (return) Data Terminal Ready (return) External Transmit Clock No Connection ISU 128 User Manual Table E-B RS-530 Interface 61202.029L2-1...

  • Page 132: Figure

    Send Timing (return) No Connection No Connection No Connection No Connection No Connection No Connection No Connection No Connection No Connection No Connection No Connection No Connection No Connection ISU 128 User Manual Figure E-2 V.35 Interface Table E-C V.35 Interface...

  • Page 133: Interface

    Digit bit MSB Data Line Occupied No Connection No Connection No Connection PIN 1 PIN 8 ISDN Description Ring ISU 128 User Manual Figure E-3 RS-366 Interface Table E-D RS-366 Interface Figure E-4 RJ-45 Interface Table E-E RJ-45 ISDN IFC 61202.029L2-1...

  • Page 134: Table E-F: Maintenance Port

    PIN 13 PIN 25 61202.029L2-1 Appendix E: Connector Pinouts PIN 1 FEMALE PIN 14 Name Description TD-A RD-A ISU 128 User Manual Figure E-5 Maintenance Port Table E-F Maintenance Port Transmitted Data Received Data...
  • Page 135 Appendix E: Connector Pinouts ISU 128 User Manual 61202.029L2-1...

  • Page 136: Acronyms

    Data Terminal Equipment Electronic Industries Association EKTS Electronic Key Telephone Service Electronic Switching System Facsimile FEBE Far End Block Errors Identification Input/Output ISDN Integrated Services Digital Network kbps Kilobits per second Kilohertz Local Area Network 61202.029L2-1 Acronyms ISU 128 User Manual...
  • Page 137 List Stored Number Ready to Send SPCS Stored Program Controlled Switching System Simple Adtran Protocol SPID Service Profile Identifier Signalling System 7 Terminal Adapter Terminal Equipment Terminal Endpoint Identifier USART Universal Synchronous/Asynchronous Receiver/ Transmitter Wide Area Network ISU 128 User Manual 61202.029L2-1...

  • Page 138: Glossary

    D-channel The ISDN channel that carrier signalling information to control the call setup, teardown, or invocation of supplementary services. The D-Channel may also be used to provide packet mode data service. 61202.029L2-1 ISU 128 User Manual...
  • Page 139 The name for the data fields within an ISDN Layer 3 message. interworking Communication between two types of networks or end equipment. This may or may not involve a difference in signalling or protocol elements supported. ISU 128 User Manual 61202.029L2-1...
  • Page 140 Network Termination 1. A unit that provides physical and electromagnetic termination of the U-interface 2-wire transmission line, converts between Layer 1 formats used at the U- and T- reference points, and performs some maintenance functions. 61202.029L2-1 ISU 128 User Manual...
  • Page 141 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 digital transmission in North America. ISU 128 User Manual 61202.029L2-1...
  • Page 142 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 quality. However, the thicker it is, the more it costs. 61202.029L2-1 ISU 128 User Manual...
  • Page 143 Generally, a communications channel offering a transmission bandwidth greater than a voice grade channel. Data transmission speeds on wideband facilities are typically in excess of 9.6 kbps and often at rates such as 56 kbps and 1.544 Mbps. ISU 128 User Manual 61202.029L2-1...
  • Page 144 A packet data transfer protocol for the B and D Channels. Defines the interface between 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. 61202.029L2-1 ISU 128 User Manual...
  • Page 145 Glossary ISU 128 User Manual 61202.029L2-1...
  • Page 146 7, 48 clear channel clear to send control line options clock mode master slave 52, 57 compression configuration quick setup remote configuration menu configure remote unit VT 100 screen connect timeout connector pinouts EIA-232 interface ISU 128 User Manual Index...
  • Page 147 DTE control line options DTE data connection DTE data rates DTE date type options DTE indicators DTE interface cable lengths DTE options bit rate CD options connector type CTS options data format (async) DSR options DTR options ISU 128 User Manual 61202.029L2-1...
  • Page 148 Generic Data I generic unit configurations getting started hang up line if self test fails if the ISU 128 does not read ready installation 61202.029L2-1 interoperability ISDN basic rate service basic rate service (defined) ordering codes...
  • Page 149 112k sync dial 115.2 asyn dial 128k sync dial 56k sync dial 57.6 asyn dial 64k sync dial ppp factory setup fallback 57.6k ldm 128 master leased 128K V34 115.2 async ISU 128 User Manual 7, 48 61202.029L2-1...
  • Page 150 DTE loopback network loopback protocol loopback remote NEBE/FEBE software version test remote test remote testing time-out 49, 50 timers 7, 53 T-link troubleshooting TXADD01 TXDEQ TXFA TXINIT ISU 128 User Manual Index...
  • Page 151 V.35 interface V34 115.2 async videoconferencing VT 100 configuration screen set password screen VT 100 terminal 18, 24 configuration screen dial options screen status screen test screen ISU 128 User Manual 61202.029L2-1...

  • Page 152: Product Support Information

    Applications Engineering Sales 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 Repair and Return If ADTRAN Technical Support determines that a repair is needed, Technical Support will coordinate with the Return Material Authorization (RMA) de- partment to issue an RMA number.

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