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AT&T 7506 User Manual

AT&T 7506 User Manual

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National Integrated Services
Digital Network (ISDN-1)
7506 and 7507 Asynchronous Data Module
Standard ISDN-1 User's Manual
555-021-734
Issue 1
October 1992

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  • Page 1 555-021-734 Issue 1 October 1992 National Integrated Services Digital Network (ISDN-1) 7506 and 7507 Asynchronous Data Module Standard ISDN-1 User’s Manual...
  • Page 2 Indianapolis, IN 46219 Order: National Integrated Services Digital Network (ISDN-1) 7506 and 7507 Asynchronous Data Module Standard ISDN-1 User’s Manual Document No. 555-021-734 Issue 1, October 1992 FCC NOTICE This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to Part 15 of the FCC Rules.
  • Page 3 IMPORTANT SAFETY INSTRUCTIONS When using your telephone equipment, the following safety precautions should always be followed to reduce the risk of fire, electric shock, and injury to persons. Read and understand all instructions. Follow all warnings and instructions marked on the telephone. This telephone can be hazardous if immersed in water.
  • Page 4 Disconnect the cords on the telephone and refer servicing to qualified service personnel when these conditions exist: when the cord or plug is damaged or frayed. if liquid has been spilled into the telephone. if the telephone has been exposed to rain or water. if the telephone does not operate normally by following the operating instructions.

  • Page 5: Table Of Contents

    Contents Introduction Introduction Data Features The System Administrator: An Important Note to All Users On the ISDN Network: An Important Note on System Dependencies Organization of the User’s Manual Getting Started Getting Started Communicating With The ADM Setting Critical Options To Make a Data Call Making a Data Call Using the CMD and AT Commands Using the CMD and AT Commands...
  • Page 6 Technical Information Technical Information EIA-232-D Lead Operation Packet Assembler Disassembler (PAD) Capabilities Messages on the Voice Terminal or the Attached Data Terminal Displays Troubleshooting Troubleshooting Use of the Data ZAP Command to Clear a Locked-up ADM Use of the Self-Test to Clear a Locked-up ADM Appendix A —...

  • Page 7: Introduction

    ISDN network. This user’s manual applies to AT&T’s first National ISDN product, referred to as Standard ISDN-1 (SI-1).* SI-1 is the firmware that supports the National ISDN-1 service offering. The ISDN 7506 and 7507 terminals are fully compliant with the requirements specified in the Customer Premises Equipment (CPE) guidelines document, Bellcore® SR-NWT-001953, Generic Guidelines for ISDN Terminal Equipment on Basic Access Interfaces .

  • Page 8: Data Features

    Data Features Asynchronous full-duplex operation at data rates from 1200 bits per second (bps) to 57.6 kilobits per second (kbps) through an EIA-232-D interface. X.25 packet switched data communication including receipt of X.29 commands from a remote X.25 host for setting packet switched data parameters. Circuit switched data communication over 56 or 64 kbps facilities via industry standard V.120 rate adaption protocol.

  • Page 9: The System Administrator: An Important Note To All Users

    The System Administrator: An Important Note to All Users Throughout this manual, we ask you to speak to your ‘‘system administrator.’’ In your company, it is the person who has been given overall responsibility for all the ISDN terminals as well as the system.

  • Page 10: Organization Of The User's Manual

    Organization of the User´s Manual This manual is arranged into the following chapters. Chapter 1: Introduction Chapter 2: Getting Started — Explains how to set some data options from the keypad and how to make a data call. Chapter 3: Using the CMD and AT Commands — Explains when to type commands, and how to use CMD and AT Local Mode Commands.

  • Page 11: Getting Started

    Getting Started This chapter explains how to prepare your Asynchronous Data Module (ADM) for data operations and how to make data calls. Communicating With The ADM You can ‘‘talk’’ to the ADM through an attached data terminal by means of commands typed on the terminal’s keyboard.

  • Page 12: Setting Critical Options To Make A Data Call

    Local Mode In local mode, commands typed at the data terminal keyboard are read, interpreted, and acted upon by the ADM to make and end data calls as well as to modify data option values. There are two varieties of local mode: local-idle and local-data. The ADM is in local-idle mode whenever no data call has been initiated.
  • Page 13 Setting Options on the 7506 or 7507 Display Sets* With the ISDN 7506 or 7507 set, you may find it easier to follow the instructions on the set’s display.
  • Page 14 Press . No additional lamps come on. DATA/SEND/OFF Follow the instructions on the set’s display as described below. * to change any of the options. Press to view the options or If you are viewing the options, press to continue stepping through the display of all the options.

  • Page 15: Making A Data Call

    . Depending upon the network’s response to the initial dialed digits, you DATA/SEND/OFF may or may not receive a CONTINUE message on the 7506 or 7507 display. Once the computer at the other end answers, both lamps remain on during the data call.
  • Page 16 Chapter 4, ‘‘Data Options and Profiles’’ for more information. To exit AT local mode and return to the CMD local mode, type: at&&t . Refer to the Changing from AT Local Mode to CMD Local Mode section in Chapter 3, ‘‘Using the CMD and AT Commands’’...
  • Page 17 Making a Data Call From a Terminal or PC Using AT Local Mode Commands The Local Mode data option must be set for AT Local Mode. See the the Setting Options To Make a Data Call section earlier in this chapter. Turn on your data terminal or PC.

  • Page 19: Using The Cmd And At Commands

    Using the CMD and AT Commands When to Type Commands You can only type commands using the data terminal keyboard to dial calls, program, and maintain your system when your ADM is in Local Mode. When your ADM is in CMD Local Mode or AT Local Mode, you are not transmitting data;...

  • Page 20: Using Cmd Local Mode Commands

    Using CMD Local Mode Commands This section provides a list of the CMD commands, has information on getting on-screen help with commands, and procedures for using the commands. To execute a command, type the command, then press . You must press RETURN RETURN to execute a command.
  • Page 21 Help for CMD Commands You can ask for help any time you have a CMD: prompt on the screen. When you type help , the system displays the following screen: CMD: help Type HELP and the topic you want to learn more about. Examples: help test, h attention COMMANDS:...
  • Page 22 Type help command to get a brief description of how to use the command or a brief description of the options available with the command: CMD: help end The ADM responds: Type END to end a data call in progress. Abbreviating CMD Commands You can abbreviate command names.
  • Page 23 Changing from CMD Local Mode to AT Local Mode To change from CMD local mode to AT local mode, at the CMD: prompt, type &&h and press . The ADM responds: AT COMMAND MODE RETURN X.25 Call Options If you are using the DX.25 Data Mode, you may need to specify call options when you dial a data call.
  • Page 24 Programming Telephone Numbers for Memory Dialing You can program up to nine telephone numbers for memory dialing of data calls and assign them customized names for easy access. Up to 30 digits can be entered. These numbers are labeled m1 through m9. Options associated with a memory dialing number include the telephone number, user selectable name, data profile, and X.25 call options described in the previous section, except call user data.
  • Page 25 Memory Dialing The ADM dials the number and loads any data profile that was stored with the telephone number. For example, use the following command to dial a number stored at memory location 1: At the CMD: prompt, type dial m1 or dial name or just simply name where name is the actual name you have assigned to the memory number.

  • Page 26: Using At Local Mode Commands

    Using AT Local Mode Commands The AT Local Mode provides an interface similar to that available on many popular modems. In particular, the AT mode is appropriate when using a PC with communications software that uses AT commands. If you need to use AT Local Mode, you should have selected the ‘‘AT’’ option when you first set the data options from your keypad.
  • Page 27 Changing from AT Local Mode to CMD Local Mode To exit AT mode and return to the CMD local mode, type: at&&t at&&a If there is no data call active, the ADM responds: Call Status: Idle Type H for help CMD: If there is a data call active, the system responds: Call Status: Data Call Active...
  • Page 28 TABLE 3-2 AT Commands and Applications Command Application To answer an incoming call atd <string> or To dial a data call atdt<string> atdp<string> To dial a voice call from the terminal keyboard ate or ate0 To disable command echo aten To enable command echo (where n is any digit other than 0) To disconnect data calls from the AT local mode ati1...
  • Page 29 S-Registers The S-registers provide a means of changing or reading selected ADM options. In most cases, the values defined for the S-registers listed in Table 3-3 are acceptable. However, if the values are not acceptable, use the information below to change the values. To view the value of a particular S-register, type ats n?, and (where the value of n is RETURN...
  • Page 30 To configure your ISDN set for your preferred method of operation, follow the steps below. Setting Voice Call Progress on the 7506 or 7507 Display Terminals* Note: The handset must be in the cradle and the speakerphone/loudspeaker must be off to set options on the keypad.

  • Page 31: Data Options And Profiles

    Data Options and Profiles The ADM stores data options (configuration information) to tell it how to communicate with the far end. The options, listed in Table 4-1 are explained in this chapter. For most applications, you will find that the CMD Local Mode factory default settings (those settings are in bold print in the table) will work for you.* If you need to change any of the options, you can store them in a data option profile.
  • Page 32 TABLE 4-1 Data Option Values Option Possible Values Answer auto, manual Attention off, 3 of the same ASCII character (+++) Autoadjust on, off Break off, attention, interrupt, break, discard, reset Char.erase , delete , #, off Ctrl follow, ignore follow, ignore Echo on, off Edit...

  • Page 33: Data Option Definitions

    Data Option Definitions The following descriptions assume single-stream operation which is the case when API is not being used. Refer to the ISDN Application Programming Interface Programmer’s Reference Manual for more information on single-stream and autostream. Note that the examples used in this section assume the use of CMD mode. Answer Option Values: auto, manual Applicable Data Protocols: All...
  • Page 34 Autoadjust Option Values: on, off Applicable Data Protocols: All If Autoadjust is on, the ADM automatically adjusts to the speed and parity of your attached data , type AT , then press terminal when you press . After this sequence, the ADM BREAK RETURN transmits the CMD: prompt to your data terminal with the current (new) speed and parity.
  • Page 35 DCD (Data Carrier Detect) Option Values: follow, ignore Applicable Data Protocols: All This option determines whether the ADM turns on the Data Carrier Detect (DCD) lead when a data call is in progress, and off when one is not (follow), or whether it keeps DCD on essentially all the time (ignore).
  • Page 36 Echo Option Values: on, off Applicable Data Protocols: All This option determines whether characters sent from the data terminal in Data Mode are echoed by the ADM. If you select on, the ADM echos characters sent by your data terminal during Data Mode. Select on if your host computer or other data endpoint does not echo characters.
  • Page 37 Flow Control Parameter Negotiation (FCPN) Option Values: off, on Applicable Data Protocols: X.25 A Flow Control Parameter Negotiation (FCPN) selection of off is used to enable the default values of the window size and the maximum packet size (two and 128, respectively) by directing the ADM not to request the X.25 FCPN facility.
  • Page 38 Idle.timer Option Values: 0.0 (off), .05 - 12.75 (seconds) Applicable Data Protocols: X.25, Mode 3, BV64I, and BV56I When the Data Mode is set to X.25, Mode 3, BV56I or BV64I, the ADM sends data through the network in packets. If the time between characters exceeds the idle.timer, less than the full packet will be sent out.
  • Page 39 Local.echo Option Values: on, off Applicable Data Protocols: N/A This option selects whether characters entered in Local Mode are echoed back to the user. Some PC communications packages access this option from the AT Local Mode. Individual users should not change this option value. Local.erase Option Values: Any ASCII character except NUL, SOH, Ctrl...
  • Page 40 Match.speed Option Values: on, off Applicable Data Protocols: Mode 2 This option permits endpoints running at different speeds to communicate via the Mode 2 protocol. To establish a Mode 2 data call both endpoints must be at the same speed or the Match.speed option must be on at the endpoint with the higher speed.
  • Page 41 Mode Option Values: B2, BA, DX25, BV64U, BV64I, BV56U, BV56I If this option is changed during an active data call, it will not take effect until the next data call. Mode selects the preferred data protocol your ADM uses to originate a data call. This option refers to data call origination only.
  • Page 42 V.120 The remaining Mode values (whose names start with BV for B-channel V.120 protocol) are appropriate selections for circuit switched connections to equipment supporting this new industry standard rate adaption protocol. Two different ‘‘frame’’ modes are supported: Unnumbered Information frame (UI- frame) mode, and (Numbered) Information frame (I-frame) mode.
  • Page 43 exact match in parity before it will accept an incoming call from your ADM, the called V.120 endpoint must be set to 8-bit no parity. To set this option from an attached terminal do the following: 1 Type set parity value (for example, set parity odd). 2 Change your data terminal’s parity to match this value.
  • Page 44 Speed Option Values: 1200, 2400, 4800, 9600, 19.2, 38.4, 57.6 kbps Applicable Data Protocols: All Use this option to change the speed at which data communications take place. To set this option from an asynchronous attached terminal, do the following: 1 Type set speed value (for example, set speed 9600) to tell the ADM the speed at which you want to communicate.
  • Page 45 Trans.flow (Transmit Flow Control) Option Values: xon/xoff, eia, off Applicable Data Protocols: X.25, Mode 3, all V.120 modes, and Mode 2* This option determines which method is used to control the flow of data from your data terminal to the ADM. When you select xon/xoff, the ADM sends your data terminal an xoff character (with current parity) when it is not ready to receive data.
  • Page 46 X25deflect Option Values: m1, m2, m3, m4, m5, m6, m7, m8, m9, and off Applicable Data Protocols: X.25 The X25deflect allows you to program your ISDN terminal to redirect incoming DX.25 calls to another X.25 device. The telephone number of the other device is stored in any memory dial location m1 through m9, and is selected by the user.

  • Page 47: Data Option Profiles

    Data Option Profiles This section describes the available data option profiles and how to create and use your own profiles. Types of Data Option Profiles A data option profile is a group of option settings. You create a profile by selecting values for each option.
  • Page 48 To use the option settings in a stored profile like p2, you must activate them; at the CMD: prompt, type: copy p2 to pA The system responds: pA updated To replace one stored profile with another, copy the replacement profile to the replaced profile; for example, type: copy p2 to p1 The above command copies the values of p2 into p1 so they are identical.
  • Page 49 Creating (Programming) a Data Option Profile It is possible for you to program profiles p1, p2, p3, and p4. Profile 1 (p1) is automatically loaded after a set self-test or power-up. The values of p1 should be set to your most frequently used settings.
  • Page 50 8 The ADM prompts: Do you want to activate this profile now (Y or N)? Type y to activate p1. The ADM responds: p1 copied to pA Type n to not activate p1. The ADM responds: p1 not copied to pA Setting Options: Changing Your Active Profile, pA To change the option values in the active profile (pA), use the set command.
  • Page 51 Storing an Active Profile, pA If you want to save the active profile as a stored profile, type: copy pA to p2 The above command stores your active profile in p2. The system responds: p2 updated. If you want to store your active profile in p1, repeat the steps above but substitute p1 for p2. Remember, in pA you cannot program your options;...
  • Page 52 Viewing an Option Profile To display the option values for any profile, use the view command. Type view to display the values of the active profile. Type view p1 to display the values of stored profile p1. Replace p1 with p2, p3, p4, or p0 in the view command to display their values. Note: Remember that you can display the options on your data terminal screen and change them whenever you are in local mode (that is, not transmitting data).

  • Page 53: Typical Data Option Settings For Data Transfer

    Typical Data Option Settings for Data Transfer This section describes the options you may need to modify for three common types of data transfer. Character by Character Transmission or ASCII File Transfer For typical character by character data transmission, activate the factory profile (p0). Depending upon the network’s configuration, it may be necessary to change the Mode option to DX25 or one of the V.120 modes.
  • Page 54 transfer files at speeds as high as 38.4 or 57.6 kbps. Worksheet — Option Profile Settings Complete the following worksheet to record your desired option profile settings for p1, p2 p3, and p4. Information entered in this worksheet helps you when you are programming an option profile.

  • Page 55: Testing

    Testing You can perform three tests on your ADM: local loopback test, remote loopback test, and self-test. Taken together, these three tests help you isolate data communications problems. Local Loopback Test The purpose of the local loopback test is to ensure there are no data transmission errors in the local part of the data transfer circuit (between the data terminal and the ADM).
  • Page 56 Remote Loopback Test This test requires compatible AT&T equipment at the remote end. The remote loopback test ensures no problems with data transmission are occurring in the data transfer circuit. When you initiate a remote loopback test, data is transmitted from the data terminal, through your ADM and the network to the data module at the far-end, where it is looped back to your ADM.
  • Page 57 Activation of the self-test will terminate any voice or data calls in progress. The procedure for self-test is described in the appropriate User’s Manual as follows, ISDN 7505 Modular Terminal and ISDN 7506 Display Terminal User’s Manual, 555-021-731 ISDN 7507 Display Terminal User’s Manual, 555-021-732 Standard ISDN-1 7506 and 7507 Display Terminal User’s Manual,...

  • Page 59: Technical Information

    Technical Information EIA-232-D Lead Operation The following description assumes single-stream operation which is the case when API is not being used. Refer to the ISDN Application Programming Interface Programmer’s Reference Manual for more information on single-stream and autostream. This section describes the assignments of the EIA-232-D leads. TABLE 6-1 EIA-232-D Assignments Interface to Attached Terminal...
  • Page 60 In the data mode, data transmitted to the data terminal consists of one start bit, eight information bits, and one stop bit. The parity of data received from the network is transported to the data terminal without alteration, except if requested to do so by X.29 message from a remote X.25 host.

  • Page 61: Packet Assembler Disassembler (Pad) Capabilities

    Pin 20 — Data Terminal Ready (CD) This circuit allows the attached terminal to control the connection of the ADM to the network. When the DTR option is set to FOLLOW, the ADM requires an ON condition to interact with the attached terminal or to initiate or maintain a data connection or test sequence (except the local self-test).
  • Page 62 TABLE 6-2 X.3 Parameters Parameter Parameter Selectable Parameter Class* Reference Description Values Meaning Number Pad Recall Pad Recall Disabled character Character DLE 2-127, As coded in ASCII except 8,17,19,21,24 Echo No echo Echo Selection of None data forwarding Alphanumerics (A-Z, a-z, 0-9) character Carriage Return All Control Characters + DEL...
  • Page 63 TABLE 6-2 (Continued) X.3 Parameters Parameter Parameter Selectable Parameter Class* Reference Description Values Meaning Number Binary speed of 1200 bit/s start-stop DTE 2400 bit/s 4800 bit/s 9600 bit/s 19200 bit/s 38400 bit/s 57600 bit/s Receive Flow Control None (DTE indicates to PAD) Use of xon/xoff EIA leads Linefeed insertion...

  • Page 64: Messages On The Voice Terminal Or The Attached Data Terminal Displays

    Messages on the Voice Terminal or the Attached Data Terminal Displays This section describes various messages that may appear on your 7506 or 7507 display or your attached data terminal. CONTINUE may appear when dialing a call or a particular feature access code. At this point, additional digits may be required to complete the call.

  • Page 65: Troubleshooting

    Troubleshooting Use of the Data ZAP Command to Clear a Locked-up ADM The following is a list of circumstances which can result in a lock-up condition between the ADM and your data terminal or PC. Note, there may be other similar conditions which will cause a lock-up as well.

  • Page 66: Use Of The Self-Test To Clear A Locked-Up Adm

    Use of the Self-Test to Clear a Locked-up ADM Self-test can also be used to reset the data options in the Active profile. Unlike the Data ZAP, which resets the options to their factory default values, the self-test resets all the data options in the Active profile to their power-up (p1) values and loads the power-up values for the profile independent data options (speed, parity, and local mode) and the unstored data options (local.cr, local.lf, and local.erase).

  • Page 67: Appendix A - Cause Code Tables

    Appendix A — Cause Code Tables The Text option allows you to select numeric (diagnostic) or verbal formats for the ADM’s presentation of network generated call progress and error code information. These tables are used to translate between numeric codes and their English text equivalents. In the following tables, there are references to unknown numeric cause and diagnostic codes in the form of xxx and nnn.
  • Page 68 TABLE A-1 X.25 Cause Messages Packet Type Stimulus Clear Reset Restart 40 Character LCD & EIA Port 24 Character LCD Decimal Decimal Decimal Verbal Text Abbreviated Text Cause,Diag. Cause,Diag. Cause,Diag. ENDED RESET RESTART 0,0 or 128,0 0,0 or 128,0 FAR END REQUESTED FAR END REQUESTED 0,nnn or 128,nnn 0,nnn or 128,nnn...
  • Page 69 TABLE A-2 Q.931 Signal Messages Decimal Value LCD and EIA Port Text DIAL TONE ON RINGING INTERCEPT TONE ON REORDER TONE ON BUSY TONE ON CONFIRM TONE ON ANSWER TONE ON CALL WAIT TONE ON O-H WARNING TONE ON CUSTOM TONE ON BUSY VERIFY TONE ON ERROR TONE ON STUTTER DIAL TONE ON...
  • Page 70 TABLE A-3 Q.931 Cause Messages Decimal Value EIA Port Text LCD Text Origin Unassigned number CCITT No route to specified network CCITT No route to destination CCITT Vacant code NT 4 National Specific Channel unacceptable CCITT Call awarded - being delivered CCITT Prefix 0 dialed in error NT 8...
  • Page 71 TABLE A-3 (Continued) Q.931 Cause Messages Decimal Value EIA Port Text LCD Text Origin Requested facility not subscribed CCITT Call type incompatible with service request NS 51 Network Specific Outgoing calls barred CCITT Service operation violated NS 53 Network Specific Incoming calls barred CCITT Bearer service not authorized...
  • Page 72 TABLE A-4 Progress Indication Messages Decimal Value EIA Port Text Call is not end-to-end ISDN Destination address is non-ISDN Origination address is non-ISDN Inband information or pattern available Delay in response at destination interface Appendix A — Cause Code Tables...
  • Page 73 Index Call options X.25, 3-5 Call screening application, 1-2 Abbreviating CMD commands, 3-4 Cause code interpretation, A-1 Activating a stored profile, 4-21 Cause messages, A-4, A-5 Active profile CCITT X.25, A-1 pA, 4-17, 4-22 CCITT Z.931, A-1 storing, 4-21 Progress indication, A-1 ADM Options CCITT, 6-3 CCITT, 6-3...
  • Page 74 Data option DIAL answer, 4-3 message, 6-6 attention, 4-3 Dialed-up data calls, 1-3 autoadjust, 4-4 Dialing a voice call, 3-12 break, 4-4 DX.25 data mode, 3-5 character erase, 4-4 data carrier detect, 4-5 data terminal ready, 4-5 Echo echo, 4-6 data option, 4-6 edit, 4-6 Edit...
  • Page 75 Programming telephone numbers, 3-6 DIAL, 6-6 Progress indication messages, A-6 INCOMING DATA CALL, 6-6 LINK DOWN, 6-6 Messages 7506 7507 display, 6-6 Receive flow control data terminal, 6-6 data option, 4-13 Minimum delay timer, 4-10 Received data (BB), 6-1 Min.timer...
  • Page 76 Variable call forwarding application, 1-2 Verbal formats, A-1 Viewing an option profile, 4-22 Viewing individual options values within the active profile, 4-22 Voice call dialing, 3-12 Voice terminal 7506, 2-3, 6-6 7507, 2-3, 6-6 messages, 6-6 Voice Terminal Control Features, 1-2 Index...

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