AT&T 7400B Data Module User’s Guide 555-020-707 Issue 1 November 1989
TO ORDER COPIES OF THIS MANUAL Call: AT&T Customer Information Center on 800-432-6600 In Canada Call 800-255-1242 Write: AT&T Customer Information Center 2855 North Franklin Road P.O. Box 19901 Indianapolis, Indiana 46219 Order: Document No. 555-020-707 Issue 1, November 1989 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.
CONTENTS PREFACE: ABOUT THIS GUIDE Typographical Conventions Organization of This Guide Related Documentation 1 CHAPTER 1: INTRODUCTION External Features 2 2-1 2-7 2-12 2-12 2-12 CHAPTER 3: FIRST TIME USERS Operating Modes Essential AT Commands Sample Command Lines A Sample On-Line Session 4 1-2 CHAPTER 2: INSTALLATION Hardware and Software Requirements Hardware Installation Initial System Checks If You Are Using a PC If You Are Using a Dedicated Terminal 3 i i ii 3-1 3-2 3-4 3-6 CHAPTER 4: OPE
5 CHAPTER 5: TROUBLESHOOTING How to Use This Chapter A APPENDIX A: AT COMMAND SET B APPENDIX B: S-REGISTERS C APPENDIX C: APPLICATION NOTES PBX Application Notes PC Applications Guide Procomm Plus Relay Gold Crosstalk XVI D 5-1 C-1 C-1 C-2 C-5 C-8 APPENDIX D: QUICK-REFERENCE SUMMARIES GL GLOSSARY
PREFACE: ABOUT THIS GUIDE DEFINITY Communications System 7400B Data Module Page i User’s Guide PREFACE: ABOUT THIS GUIDE The purpose of this guide is to provide information for installing, operating, and maintaining the 7400B Data Module. TYPOGRAPHICAL CONVENTIONS Throughout this guide, command lines that you type are shown in typewriter-style characters, and responses that the 7400B Data Module returns are shown in italics. The following is an example.
PREFACE: ABOUT THIS GUIDE DEFINITY Communications System 7400B Data Module User’s Guide Page ii Chapter 5: Troubleshooting. Describes procedures for troubleshooting problems that may be encountered while configuring and operating the 7400B Data Module. Appendix A: AT Command Set. Contains an explanation of each AT command accepted by the 7400B Data Module. Appendix B: S-Registers. Contains an explanation of each Sregister used by the 7400B Data Module. Appendix C: Application Notes.
DEFINITY Communications System 7400B Data Module CHAPTER 1: INTRODUCTION Page 1-1 User’s Guide CHAPTER 1: INTRODUCTION This chapter discusses the basic operating features of the 7400B Data Module and describes the external indicators and connectors.
DEFINITY Communications System CHAPTER 1: INTRODUCTION 7400B Data Module User’s Guide Page 1-2 ● data metering option ● programmable control characters ● self-test at start-up ● local and remote loopback tests ● test duration timers ● voice terminal powered by the PBX is not affected if ac power is removed from the 7400B Data Module EXTERNAL FEATURES The external features of the front and rear panels of the 7400B Data Module and the separate power supply unit are described in this section.
DEFINITY Communications System CHAPTER 1: INTRODUCTION 7400B Data Module Page 1-3 User’s Guide Connector Description POWER/ TEST This red LED lights as long as power is applied to the data module. This LED flashes during any test mode, except the start-up self-test. It also flashes along with the DATA LED if the connection with the PBX is lost. DATA METERING This red LED lights to indicate the state of the CTS (Clear To Send) output lead when the Data Metering option is enabled.
CHAPTER 1: INTRODUCTION DEFINITY Communications System 7400B Data Module User's Guide Page 1-4 Rear Panel The rear panel of the 7400B Data Module is shown in Figure 1-2, and the connectors located on the rear panel are described in Table 1-2. Figure 1-2. Rear Panel Connector Description PHONE This connector accepts one end of the D8W telephone line cord used to connect a telephone or voice terminal to the data module.
CHAPTER 1: INTRODUCTION DEFINITY Communications System 7400B Data Module Page 1-5 User’s Guide Power Supply Unit A separate power supply unit is required with the 7400B Data Module. This unit connects between a grounded AC outlet and the “POWER” connector at the rear of the data module. This power supply unit provides the necessary operating voltages for the data module.
CHAPTER 2: INSTALLATION DEFINITY Communications System 7400B Data Module Page 2-1 User’s Guide CHAPTER 2: INSTALLATION This chapter describes the hardware and software required for installing the data module, and outlines procedures for preparing the data module for operation.
DEFINITY Communications System 7400B Data Module User’s Guide CHAPTER 2: INSTALLATION Page 2-2 PERSONAL COMPUTER 7400B DATA MODULE EIA CABLE POWER SUPPLY D8W CORD PBX WALL JACK Figure 2-1.
DEFINITY Communications System CHAPTER 2: INSTALLATION 7400B Data Module Page 2-3 User’s Guide Figure 2-2.
CHAPTER 2: INSTALLATION Page 2-4 DEFINITY Communications System 7400B Data Module User’s Guide Figure 2-3.
DEFINITY Communications System CHAPTER 2: INSTALLATION 7400B Data Module Page 2-5 User’s Guide About the Terminal Device The 7400B Data Module operates with any asynchronous data terminal device that has an EIA-232-D (or RS-232-C) serial port connector. If you are using a PC as your terminal, you will need a suitable data communications software package. Also, you must set the appropriate configuration options before connecting the 7400B Data Module to a printer or plotter.
CHAPTER 2: INSTALLATION DEFINITY Communications System 7400B Data Module User’s Guide Page 2-6 ● ● Predefine data options profiles. Some programs include completely defined data option profiles (also called configuration profiles) for popular modems. If available, select the options profile for the Hayes® Smartmodem 2400™. Command files. These files, also called script files, allow you to define a group of commands that may be executed for automatically logging into specific remote devices.
CHAPTER 2: INSTALLATION DEFINITY Communications System 7400B Data Module Page 2-7 User’s Guide Data Metering Option (SW1-5) When the data metering option is disabled (SW1-5 set to "OFF"), the transfer speed of the 7400B Data Module will adjust to match the transfer speed of the remote system. The C0NNECT xxxx message displayed when a connection is completed will always indicate the far end speed.
DEFINITY Communications System CHAPTER 2: INSTALLATION 7400B Data Module User’s Guide Page 2-8 Setting the Hardware Option DIP Switches Three hardware options are selected by setting switches on an internal 8-position DIP switch. Setting these switches is described in the following paragraph; however, for more information about using these options, refer to Chapter 4, “Operation and Configuration.” Note: The factory-default settings of these switches are correct for the vast majority of applications.
DEFINITY Communications System CHAPTER 2: INSTALLATION 7400B Data Module User’s Guide Page 2-9 To access and set the hardware option switches, refer to Figure 2-4 and perform the following: Figure 2-4.
DEFINITY Communications System 7400B Data Module User’s Guide CHAPTER 2: INSTALLATION Page 2-10 Caution: 1. Connecting the EIA-232-D Cable Disconnect all cables and telephone cords attached at the rear of the unit. Failure to disconnect all cables and cords at this point could result in permanent damage to the 7400B Data Module. Remove the top access panel of the data module as follows: a.
DEFINITY Communications System CHAPTER 2: INSTALLATION 7400B Data Module User’s Guide Connecting the DCP Cord Page 2-11 Attach the DCP type D8W telephone cord as follows: 1. Insert either end of the telephone cord into the connector on the rear panel of the Data Module labeled LINE. 2. Insert the other end of the telephone cord into the PBX wall jack. 3. If you are using the with-phone option of the 7400B Data Module (voice and data), install the second D8W telephone cord as follows: a.
CHAPTER 2: INSTALLATION DEFINITY Communications System 7400B Data Module User’s Guide Page 2-12 INITIAL SYSTEM CHECKS This section describes procedures for initially checking out your hardware and any required software. It is assumed at this point that your hardware and data communications software have been properly installed and are ready for use. Note: Power-Up Self-Test Data communications software is required only if you are using a PC as your terminal device.
CHAPTER 3: FIRST TIME USERS DEFINITY Communications System 7400B Data Module User’s Guide Page 3-1 CHAPTER 3: FIRST TIME USERS This chapter provides some basics on 7400B Data Module operation, describes how to use a few AT commands that are essential for most data communications operations, and then outlines a typical on-line session.
DEFINITY Communications System CHAPTER 3: FIRST TIME USERS 7400B Data Module User’s Guide Page 3-2 All of these parameters may be changed on the local terminal device as needed. The 7400B Data Module will adjust to match the speed and parity of the local terminal device. If you connect to a remote system and your screen shows a series of nonsense characters (also referred to as "garbage"), chances are that you need to adjust speed or parity.
CHAPTER 3: FIRST TIME USERS DEFINITY Communications System 7400B Data Module Page 3-3 User’s Guide AT Command AT Description The command prefix that must be typed as the first two letters of all AT commands except +++ and A/. This prefix gets the AT tention of the data module. Note: D The Dial command. This command follows the AT and precedes the number that you wish your data module to dial.
DEFINITY Communications System 7400B Data Module CHAPTER 3: FIRST TIME USERS User’s Guide Page 3-4 AT Command +++ Description The escape character sequence. This is one of the two commands that does not require the AT prefix. Once you have connected to the remote device, your data module assumes the on-line mode of operation. If you need to return to the command mode, leave the keyboard idle for at least one second, and then type +++ without pressing [ Enter ].
CHAPTER 3: FIRST TIME USERS DEFINITY Communications System 7400B Data Module User’s Guide Page 3-5 In the first line of this example, ● AT is the required command prefix, ● D is the dial command, ● and the remainder of the line is the telephone number. Note: The spaces between the commands and the telephone number are included only for readability and are not required. You may also insert hyphens (-) anywhere in the telephone number for increased readability.
DEFINITY Communications System 7400B Data Module User’s Guide CHAPTER 3: FIRST TIME USERS Page 3-6 EXAMPLE 4: Changing data options. at el &d2 s0=5 [ Enter ] This command line is a command sequence that sets up the 7400B Data Module to automatically answer incoming calls.
CHAPTER 3: FIRST TIME USERS DEFINITY Communications System 7400B Data Module Page 3-7 User’s Guide Another possible problem is that the remote end response contains normal words mixed in with strange characters, many of which are left brackets ([). This usually indicates that the remote device is sending ANSI display control sequences, and your terminal does not recognize them (ANSI stands for American National Standards Institute).
DEFINITY Communications System 7400B Data Module CHAPTER 4: OPERATION AND CONFIGURATION Page 4-1 User’s Guide CHAPTER 4: OPERATION AND CONFIGURATION This chapter describes how to change, store, and recall configuration parameters, outlines how to create and save custom configuration profiles, and discusses more advanced command usage with example command lines. CONFIGURATION PARAMETERS Values for configuration parameters are selected by using AT commands to change values contained in the S-registers.
CHAPTER 4: OPERATION AND CONFIGURATION DEFINITY Communications System 7400B Data Module User’s Guide Page 4-2 Command Line: Action: at&v [ Enter ] Display current AT command settings and S-register values in the active profile and the two stored profiles (also displays the four stored telephone numbers, which are described in a section of this chapter titled “Number Storage”).
DEFINITY Communications System CHAPTER 4: OPERATION AND CONFIGURATION 7400B Data Module User’s Guide Page 4-3 In command mode, the 7400B Data Module looks at everything you type on your keyboard. When you type in something that the data module recognizes as a valid command with a valid parameter (if required), it will execute the action requested. A valid command with an invalid parameter will produce the ERROR result code, and an invalid command is simply ignored.
DEFINITY Communications System CHAPTER 4: OPERATION AND CONFIGURATION 7400B Data Module User’s Guide Page 4-4 Note: A special application may require choosing a different line terminating character, accomplished by issuing the command: ats3= ddd [ Enter ] where ddd is a 1- to 3-digit decimal representation of the ASCII character with a range of 0 through 127 (see ASCII Character Set in Appendix D).
CHAPTER 4: OPERATION AND CONFIGURATION DEFINITY Communications System 7400B Data Module Page 4-5 User’s Guide Command Acknowledgement Most commands are acted upon immediately and are acknowledged by the result code OK. This assumes that the result codes are configured in the verbose form (command V1 is in effect), and are enabled (Q0 in effect).
CHAPTER 4: OPERATION AND CONFIGURATION DEFINITY Communications System 7400B Data Module User’s Guide Page 4-6 Multiple Characters If you type in the at prefix and it displays on your screen as aatt, you may disable the command echo by typing the following command: ate0 [ Enter ] The command will appear as aattee00 as you type it, but the data module will send the response code OK to your screen. The next command that you type should appear in single characters.
CHAPTER 4: OPERATION AND CONFIGURATION DEFINITY Communications System 7400B Data Module Page 4-7 User’s Guide The following is an example: atd74768 [ Enter ] In the example, the command will cause the data module to go off hook, dial the number, and then wait the period of time specified in S-register S7 for the call to be completed. If the call is not completed, the data module will disconnect and send the result code NO CARRIER to your display screen.
CHAPTER 4: OPERATION AND CONFIGURATION DEFINITY Communications System 7400B Data Module User’s Guide Page 4-8 Command line: Action: at&z m=nnn...n [ Enter ] Store number nnn...n in location m, which is one of four locations designated by the numbers 0 through 3. For example: at&z2=92015551212 [ Enter ] stores the number 92015551212 in number storage location 2. at&zm= [ Enter ] Delete any number stored in location m, which is one of four locations designated by the numbers 0 through 3.
DEFINITY Communications System CHAPTER 4: OPERATION AND CONFIGURATION 7400B Data Module User’s Guide Page 4-9 If nnn is 0 (the factory-default setting), the automatic answer feature is turned off. The red LED on the front of the data module labeled “AA” lights when the automatic feature is turned on. REMOTE SITE USE The 7400B Data Module can be used at a remote site as a dedicated service device to answer incoming data calls, send data to a remote end device, and then hang up.
CHAPTER 4: OPERATION AND CONFIGURATION DEFINITY Communications System 7400B Data Module User’s Guide Page 4-10 A second command allows you to recall the factory-default configuration if, for instance, you loose track of changes you have made and need to start over.
CHAPTER 5: TROUBLESHOOTING DEFINITY Communications System 7400B Data Module Page 5-1 User’s Guide CHAPTER 5: TROUBLESHOOTING This chapter describes procedures for troubleshooting most problems that may be encountered while installing, configuring, and operating the 7400B Data Module. HOW TO USE THIS CHAPTER Use the following guidelines to isolate and correct a problem: 1.
DEFINITY Communications System CHAPTER 5: TROUBLESHOOTING 7400B Data Module User’s Guide Page 5-2 Symptom Problem Solution All LEDs are off. Power is off. Check that the AC outlet is live. Check that the power supply unit is connected to the 7400B Data Module and to the AC outlet. POWER/TEST and DATA LEDs flash together. The data module has lost communications with the PBX. Check that the D8W cord is connected between the LINE connector of the data module and a PBX wall jack.
CHAPTER 5: TROUBLESHOOTING DEFINITY Communications System 7400B Data Module Page 5-3 User’s Guide Symptom Problem Solution Call disconnects immediately after an attempt to connect; NO CARRIER may be displayed on the local terminal device; CHECK SPEED LED lights. The speed of the far end device is higher than the speed of the local terminal device. Change the speed of the local terminal device to match that of the far end device.
CHAPTER 5: TROUBLESHOOTING DEFINITY Communications System 7400B Data Module User’s Guide Page 5-4 Symptom Problem Solution The PC communications software indicates that the call has been disconnected, but the DATA LED remains lit. The data module has ignored the on-to-off transition of the DTR lead. From command mode, type the command at&d2 [ Enter ] to set the DTR lead option to disconnect on DTR lead transition from on-to-off.
CHAPTER 5: TROUBLESHOOTING DEFINITY Communications System 7400B Data Module Page 5-5 User’s Guide Symptom Problem Solution The AA LED flashes but the data module does not automatically answer the incoming call. The automatic answer option is not enabled; when there is no incoming call, the AA LED is off. From the command mode, type The automatic answer option is enabled; the AA LED is on when there is no incoming call, but the terminal device is not ready (TR LED is off).
DEFINITY Communications System 7400B Data Module User’s Guide CHAPTER 5: TROUBLESHOOTING Page 5-6 Symptom Problem Solution Transmitted and/or received data contains errors. Speed settings of the terminal device and the data module are not the same. Change terminal device speed to agree with the speed that was indicated in the C0NNECT nnnn message. The local terminal device and the far end device are configured for different parity settings.
DEFINITY Communications System CHAPTER 5: TROUBLESHOOTING 7400B Data Module Page 5-7 User’s Guide Symptom Problem Solution Commands are displayed without error as they are typed (echoed), but the data module does not respond to any command. The local terminal device is set to a speed not supported by the 7400B Data Module. Set the terminal device for one of the supported speeds: 300, 1200, 2400, 4800, 9600, or 19200 bps.
APPENDIX A: AT COMMAND SET DEFINITY Communications System 7400B Data Module Page A-1 User’s Guide APPENDIX A: AT COMMAND SET This appendix contains an explanation of each AT command accepted by the 7400B Data Module. Labels used in the descriptions are defined as follows: Label Description Command: The command is shown as it should be typed. The command may be typed in uppercase or lowercase.
APPENDIX A: AT COMMAND SET Page A-2 Label DEFINITY Communications System 7400B Data Module User’s Guide Description (Contd.) Example: A sample command line follows this label to demonstrate how the command may be used. Comments: An explanation of the example and any other information about the command not provided elsewhere is provided here. Additional commands may be typed on the same command line with the command currently under discussion, unless noted otherwise.
DEFINITY Communications System APPENDIX A: AT COMMAND SET 7400B Data Module Page A-3 User’s Guide Command: +++ Function: Escape sequence. Type: immediate Arguments: none S-Register: none Example: +++ Comments: The purpose of the +++ command is to provide a way to switch the data module from on-line or data mode to command mode without disconnecting a data call that is in progress. As long as the call is not disconnected, you can return to the on-line mode with the O command.
APPENDIX A: AT COMMAND SET DEFINITY Communications System 7400B Data Module User's Guide Page A-4 Command: A Function: Go off-hook in Answer mode. Type: immediate Arguments: none S-Register: Bit 7 of S14 is set to 0. Example: ata [ Enter ] Comments: The A command causes the data module to go off-hook in answer mode and attempt to answer an incoming call. The option set by the &D command and the contents of S0 and S1 are ignored when this command is issued.
APPENDIX A: AT COMMAND SET DEFINITY Communications System 7400B Data Module Page A-5 User’s Guide Command: D Function: Dial a telephone number. Type: immediate Arguments: The D command requires an ASCII character string, which is sent by the data module to the PBX. The string may include any ASCII character, with the following restrictions: ● If the letters “t” or “p” (uppercase or lowercase) are typed as the first character following the D command, the data module will delete either character.
APPENDIX A: AT COMMAND SET DEFINITY Communications System 7400B Data Module Page A-6 User’s Guide Command: D (Contd.) S-Register: Bit 7 of S14 is set to 1. Example 1: atd555–1212 [ Enter ] Example 2: atds=1 [ Enter ] Comments: In example 1, the number 555-1212 is dialed. The hyphen (-) is optional and may be used for easier reading of the command line. In example 2, the number stored in telephone number location 1 is dialed.
DEFINITY Communications System 7400B Data Module APPENDIX A: AT COMMAND SET Page A-7 User’s Guide Command: H Function: Switch hook control. Type: immediate Arguments: No argument or an argument of 0 causes the data module to go onhook. S-Register: none Example: ath [ Enter ] Comments: The H command with no argument can be used during a data call to cause the 7400B Data Module to go on-hook (hang up) after using the escape sequence (+++) to return to command mode.
APPENDIX A: AT COMMAND SET DEFINITY Communications System 7400B Data Module User’s Guide Page A-8 Command: I Function: Request product code or ROM checksum. Type: immediate Arguments: The I command accepts one of three arguments as follows: 0 - The data module displays the decimal number 249, followed by a carriage return and line feed. 1 - The data module displays the ROM checksum as two four-digit hexadecimal values, followed by a carriage return and line feed.
DEFINITY Communications System APPENDIX A: AT COMMAND SET 7400B Data Module User's Guide Page A-9 Command: Q Function: Turn the display of result codes on or off. Type: configuration Arguments: No argument or an argument of 0 enables the display of result codes; an argument of 1 disables the display of result codes. The factorydefault is result codes enabled. S-Register: Bit 2 of S14 is set according to the argument used with the Q command.
APPENDIX A: AT COMMAND SET DEFINITY Communications System 7400B Data Module Page A-10 User’s Guide Command: X Function: Control the extended result code set and dialing capabilities. Type: configuration Arguments: The X command accepts one of 5 arguments as follows: 0 - The basic result code set (0—4) is enabled. No dial tone or busy signal detection. No speed indication on connect. 1 - Result codes 0—5, 10—12, and 14 are enabled. No dial tone or busy signal detection.
DEFINITY Communications System APPENDIX A: AT COMMAND SET 7400B Data Module Page A-11 User’s Guide Command: Z Function: Reset and recall a stored profile. Type: immediate Arguments: No argument or an argument of 0 recalls the configuration profile stored in location 0; an argument of 1 recalls the configuration profile stored in location 1.
APPENDIX A: AT COMMAND SET DEFINITY Communications System 7400B Data Module User’s Guide Page A-12 Command: &C Function: Data Carrier Detect (DCD) options. Type: configuration Arguments: The &C command accepts one of two arguments as follows: 0 - (or no argument) maintain the DCD circuit on at all times (factory-default setting) 1 - the DCD circuit operates according to the EIA-232-D standard S-Register: Bit 5 of S21 is set according to the argument used with the &C command.
DEFINITY Communications System APPENDIX A: AT COMMAND SET 7400B Data Module User’s Guide Page A-13 Command: &D Function: Data Terminal Ready (DTR) options. Type: configuration Arguments: The &D command accepts one of four arguments as follows: 0 - ignore the DTR interchange circuit (factory-default setting). 1 - return to the command state if an on-to-off transition is detected on the DTR input; an active data call is not disconnected.
APPENDIX A: AT COMMAND SET DEFINITY Communications System 7400B Data Module User’s Guide Page A-14 Command: &F Function: Load the factory-default configuration. Type: immediate Arguments: none S-Register: none Example: at&f [ Enter ] Comments: The factory-default configuration values are permanently stored in ROM and can be recalled at any time. No reset or self-test is initiated by issuing the &F command. See Also: Chapter 4, “Operation and Configuration.
APPENDIX A: AT COMMAND SET DEFINITY Communications System 7400B Data Module User’s Guide Page A-15 Command: &T Function: Control diagnostic and test facilities.
DEFINITY Communications System 7400B Data Module APPENDIX A: AT COMMAND SET User’s Guide Page A-16 Command: &V Function: View the active configuration and stored profiles. Type: immediate Arguments: The &V command does not take an argument.
DEFINITY Communications System APPENDIX A: AT COMMAND SET 7400B Data Module User’s Guide Page A-17 Command: &W Function: Store the active configuration profile. Type: immediate Arguments: No argument or an argument of 0 stores to location 0, an argument of 1 stores to location 1. S-Register: none Example: at&w0 [ Enter ] Comments: In the example, the currently active configuration profile is stored to memory location 0. Only a subset of the configuration parameters are actually stored.
APPENDIX A: AT COMMAND SET Page A-18 DEFINITY Communications System 7400B Data Module User’s Guide Command: &Z Function: Store a telephone number. Type: immediate Arguments: The &Z command accepts one of four arguments (0 through 3), which designates the memory location in which the dialing string that follows the command will be stored. S-Register: none Example: at&z2=555-1212 [ Enter ] Comments: In the example, the dial string 555-1212 is stored in memory location 2.
DEFINITY Communications System APPENDIX B: S-REGISTERS 7400B Data Module User’s Guide Page B-1 APPENDIX B: S-REGISTERS This appendix contains an explanation of each S-register used by the 7400B Data Module. An S-register is an 8-bit location in non-volatile memory that is used for storing the value of one or more configuration parameters. When the data module is first powered on, the values that were last stored in the S-registers are the values in effect until AT commands are issued to change them.
DEFINITY Communications System 7400B Data Module User’s Guide APPENDIX B: S-REGISTERS Page B-2 Label Description Register: The S-register is identified following this label. Note that the names for S-registers 1 through 9 may be typed as two-digit numbers with leading zeros, if desired, for readability (e.g., S01 is equivalent to S1). Description: The purpose and use for the S-register is explained following this label.
DEFINITY Communications System APPENDIX B: S-REGISTERS 7400B Data Module User’s Guide Label Page B-3 Description (Contd.) Storable: A yes after this label indicates that the contents of this S-register will be written when the current configuration profile is saved to one of the two configuration profile storage locations. A no here indicates that the contents of the S-register will not be written to storage.
DEFINITY Communications System 7400B Data Module APPENDIX B: S-REGISTERS User’s Guide Page B-4 Register: S0 Description: The value in this S-register represents the ring number on which an incoming call will be automatically answered. Range of Values: The value may be 000 through 255 rings. The factory-default setting is 000 rings. Storable: yes Comments: Setting S-register S0 to any value from 001 through 255 enables automatic answer; a value of 000 disables automatic answering.
DEFINITY Communications System APPENDIX B: S-REGISTERS 7400B Data Module User’s Guide Page B-5 Register: S2 Description: This S-register stores the ASCII value of the escape sequence character. Range of Values: Value may be 000 through 127 (see comments); factory-default setting is 043, the ASCII code for a plus sign (+). Storable: no Comments: Setting the value greater than 127 will disable escape sequence detection, in which case the escape sequence cannot be used to move to command mode.
DEFINITY Communications System 7400B Data Module User’s Guide APPENDIX B: S-REGISTERS Page B-6 Register: S4 Description: This S-register holds the ASCII value for the line feed character. Range of Values: Value may be 000 through 127; factory default setting is 010, usually output by the Ctrl-J key combination from a display terminal. Storable: no Comments: none See Also: Chapter 4, “Operation and Configuration.
DEFINITY Communications System APPENDIX B: S-REGISTERS 7400B Data Module User’s Guide Page B-7 Register: S7 Description: Wait time for line signal or dial tone. If line signal is not detected within this time, the call will be disconnected. Range of Values: Value may be 001 through 055 seconds; factory-default value is 030 seconds. Storable: no Comments: This register will affect only the wait time for line signal detection.
DEFINITY Communications System APPENDIX B: S-REGISTERS 7400B Data Module User’s Guide Page B-8 Register: S11 — not used Register: S12 Description: The value in this S-register determines the minimum delay required immediately before and after entering the escape sequence (guard time). It also determines the maximum interval allowed between entering each of the three consecutive characters of the sequence. Range of Values: Value may be 000 through 255 fiftieths (0.
APPENDIX B: S-REGISTERS DEFINITY Communications System 7400B Data Module Page B-9 User’s Guide Register: S14 Description: This S-register is used to store the status of bit-mapped options as follows: bit 0 — not used (always set to 0) bit 1 — 0 = command echo disabled, 1 = command echo enabled (default = 1, see E command) bit 2 — 0 = result codes enabled, 1 = result codes disabled (default = 0, see Q command) bit 3 — 0 = short result codes, 1 = verbose result codes (default = 1, see V command) bit 4
DEFINITY Communications System 7400B Data Module User’s Guide APPENDIX B: S-REGISTERS Page B-10 Register: S16 Description: This S-register stores test function status in a bit-mapped format as follows: bit 0 — local digital loop test; 0 = test disabled, 1 = test in progress (default = 0, see the &T1 and &T2 commands) bit 1 — not used (always set to 0) bit 2 — local data loop test; 0 = disabled, 1 = test in progress (default = 0, see &T3 command) bit 3 — status bit for remote digital loop initiated by r
DEFINITY Communications System 7400B Data Module APPENDIX B: S-REGISTERS Page B-11 User’s Guide Register: S18 Description: The value in this S-register establishes the duration of diagnostic tests initiated by the &T command. Range of Values: Value may be 000 through 255 seconds. The factory-default value is 0. Storable: yes Comments: Any locally initialized test in progress is automatically terminated when the time specified in S-register 18 has elapsed.
DEFINITY Communications System 7400B Data Module APPENDIX B: S-REGISTERS User’s Guide Page B-12 Register: S21 Description: This S-register is used to store the status of bit-mapped options as follows: bit 0 — not used (default = 0, see comment 1) bit 1 — not used (always set to 0) bit 2 — not used (default = 0, see comment 1) bits 3 and 4 — DTR options; value depends on argument of DTR option command (default = 00, see &D command) bit 5 — DCD options; 0 = always on, 1 = EIA-232-D standard (default =
APPENDIX B: S-REGISTERS DEFINITY Communications System 7400B Data Module Page B-13 User’s Guide Register: S22 Description: This S-register is used to store the status of bit-mapped options as follows: bits 0 and 1 — not used (default = 2, see comment 1) bits 2 and 3 — not used (default = 1, see comment 1) bits 4, 5 and 6 — result codes; value depends on argument of result code options command (default = 0, see X command) bit 7 — not used (default = 0, see comment 1) Range of Values: Value may be 00
DEFINITY Communications System 7400B Data Module APPENDIX B: S-REGISTERS User’s Guide Page B-14 Register: Description: S23 This S-register is used to store the status of bit-mapped options as follows: bit 0 — allow remote loop request from remote system; 0 = disabled, 1 = enabled (default = 1, see &T command) bits 1, 2, and 3 — local communications speed (see comment 1) 0 = 300 bps 1 = not used 2 = 1200 bps 3 = 2400 bps (factory-set default) 4 = 4800 bps 5 = 9600 bps 6 = 19200 bps 7 = not used bits 4 a
DEFINITY Communications System APPENDIX B: S-REGISTERS 7400B Data Module User’s Guide Page B-15 Register: S25 Description: The value in this S-register determines how long a change of state (OFF to ON or ON to OFF) on the Data Terminal Ready (DTR) lead must persist before it is acknowledged. If the change of state persists for a shorter time than is specified in S-register 25 it is ignored. Range of Values: Values may be 000 through 255 hundreds of a second (0.01 sec.).
DEFINITY Communications System APPENDIX C: APPLICATION NOTES 7400B Data Module User’s Guide Page C-1 APPENDIX C: APPLICATION NOTES This appendix provides a list of application notes that describe how to administer specific AT&T PBX systems for using the data module and describes how to configure some popular PC data communications software packages for use with the 7400B Data Module.
DEFINITY Communications System APPENDIX C: APPLICATION NOTES 7400B Data Module User’s Guide Page C-2 PROCOMM PLUS Procomm Plus is a data communications software package produced by Datastorm Technologies, Inc. The following procedures are based on version 1.1B of the software package. Configuring the Software Note: If Procomm Plus is being installed for the first time select Hayes 2400 as the modem type. 1 . To begin Procomm Plus, at the DOS prompt type pcplus [ Enter ] 2.
APPENDIX C: APPLICATION NOTES DEFINITY Communications System 7400B Data Module Page C-3 User’s Guide PROCOMM PLUS SETUP UTILITY MODEM RESULT MESSAGES A – 300 baud connect message . . . . . . CONNECT B – 1200 baud connect message . . . . . CONNECT 1200 C – 2400 baud connect message . . . . . CONNECT 2400 D – 4800 baud connect message . . . . . CONNECT 4800 E – 9600 baud connect message . . . . . CONNECT 9600 F – 19200 baud connect message . . . . CONNECT 19200 G – No connect message 1 . . . . . . . . .
DEFINITY Communications System 7400B Data Module APPENDIX C: APPLICATION NOTES User’s Guide Page C-4 DIALING DIRECTORY: PCPLUS NUMBER BAUD P D S D SCRIPT NAME 2400 N-8-1 F 1 2400 N-8-1 F 2 2400 N-8-1 F 3 2400 N-8-1 F 4 2400 N-8-1 F 5 2400 N-8-1 F 6 7 2400 N-8-1 F 2400 N-8-1 F 8 I -- I Revise Entry 1 I ------------------- I 2400 N-8-1 F 9 NAME: ATTMAIL I I 2400 N-8-1 F I 10 I NUMBER: 9,1800-624-5123 --------- I BAUD: 2400 I -------------------------------PgUp S I PARITY: NONE I --------------------------
DEFINITY Communications System 7400B Data Module APPENDIX C: APPLICATION NOTES Page C-5 User’s Guide RELAY GOLD Configuring the Software Relay Gold is a data communications software package produced by Relay Communications, Inc. The following procedures are based on release 3.0 of the software package. 1. At the DOS prompt, type install [ Enter ] 2. Enter your personal computer ID. 3 . Select the letter that corresponds to the Hayes Smartmodem 2400 or compatible for port COM1.
APPENDIX C: APPLICATION NOTES DEFINITY Communications System 7400B Data Module User’s Guide Page C-6 2. Type the telephone number of the system you want to call, and Relay Gold sends the number to the 7400B Data Module to dial the system. This example uses ATTMAIL as the system to be called. Placing a Call Through the Directory 1. At the OFF LINE menu, press [ F3 ] to select the Review the Directory of Computers option. 2. At the name field, type ATTMAIL 3.
APPENDIX C: APPLICATION NOTES DEFINITY Communications System 7400B Data Module Page C-7 User’s Guide 7. Make any necessary changes in the appropriate fields. 8. Press [ Enter ] to save changes to the PC hard disk and display the Directory of Computers screen. 9. Use the up and down arrow keys to select the system that you want to call. 10. Press [ F1 ] to call the system located next to the cursor. Relay Gold sends the number to the 7400B Data Module to dial the system.
DEFINITY Communications System 7400B Data Module User’s Guide APPENDIX C: APPLICATION NOTES Page C-8 Crosstalk XVI is a data communications software package produced by Digital Communications Associates. CROSSTALK XVI Configuring the Software 1. At the DOS prompt, type xtalk [ Enter ] A title screen is displayed for a few seconds, followed by the Status Screen as shown below.
APPENDIX C: APPLICATION NOTES DEFINITY Communications System 7400B Data Module Page C-9 User’s Guide 8. Select the baud rate that you will use most often.* 9. Select the type of video display used in your PC.* 10. Press [ Y ] to save the new configuration settings to the hard disk of the PC. 11. Press [ Enter ] to return to the Status Screen. Placing a Call To create a command file for a computer system that you want to call for the first time, use the NEWUSER script file. 1.
DEFINITY Communications System 7400B Data Module User’s Guide APPENDIX C: APPLICATION NOTES Page C-10 3. 4. Disconnecting a Call For a listed service: a. Enter the telephone number (for example, 5551234 or 9,5551234). b. Enter the baud rate (for example, 300, 1200, 2400). c. Enter any other parameters required for that specific service (such as login, password, account number). d. Enter [ Y ] when you are asked to make the call. For a service not listed: a.
APPENDIX D: QUICK-REFERENCE SUMMARIES DEFINITY Communications System 7400B Data Module Page D-1 User’s Guide APPENDIX D: QUICK-REFERENCE SUMMARIES This appendix contains quick-reference summaries for the following data: ● AT Command Set ● S-Registers ● Result Codes ● Factory-Default Configuration ● EIA-232-D Pin Assignments ● ASCII Character Set
APPENDIX D: QUICK-REFERENCE SUMMARIES Page D-2 DEFINITY Communications System 7400B Data Module User’s Guide Command Description AT Command prefix—precedes most commands. A Go off hook and remain in command state. A/ Repeat the last command line. D Enter originate mode and dial number that follows. E0 E1 Inhibit command state echo. Enable command state echo. H0 H1 Go on-hook (hang up). Accepted but causes no action. I0 I1 I2 Returns decimal number 249 to data terminal.
DEFINITY Communications System 7400B Data Module APPENDIX D: QUICK-REFERENCE SUMMARIES Page D-3 User’s Guide Command Description &C0 &C1 Maintain DCD circuit in ON state. DCD circuit operates according to EIA-232-D specification. &D0 &D1 &D3 Ignore DTR signal. Return to command mode if ON/OFF transition of DTR is detected; active call is not disconnected. Return to command mode if ON/OFF transition of DTR is detected; active call is disconnected.
APPENDIX D: QUICK-REFERENCE SUMMARIES Page D-4 DEFINITY Communications System 7400B Data Module User’s Guide Register Description Range/Unit S0 S1 S2 S3 S4 Ring to answer on. Incoming ring count. Escape sequence character. Carriage return character. Line feed character. 000-255 count 000-255 count 000-127 ASCII 000-127 ASCII 000-127 ASCII S5 S6 S7 S8 S9 Back space character. Not used. Wait time for call completion. Not used. Not used. 000-032, 127 ASCII — 001-055 sec.
APPENDIX D: QUICK-REFERENCE SUMMARIES DEFINTY Communications System 7400B Data Module Page D-5 User’s Guide Verbose Form Numeric Description OK 0 Command accepted CONNECTED 1 Connection made at 300 bps Note: If command X1 is in effect, CONNECT means connection made at whatever speed both ends of the call agreed upon.
DEFINITY Communications System 7400B Data Module User’s Guide APPENDIX D: QUICK-REFERENCE SUMMARIES Page D-6 Parameter Value AT Command Command state echo Communication mode Default user profile enabled asynchronous profile 0 E1 &M0/&Q0 &Y0 DCD circuit option DSR circuit option DTR circuit option always on always on DTR ignored &C0 &S0 &D0 — — — &G0 Y0 &P0 RDL request Result codes Result code format granted enabled text &T4 Q0 V1 Result code subset Not used by 7400B Data Module Not used by 7
DEFINITY Communications System 7400B Data Module APPENDIX D: QUICK-REFERENCE SUMMARIES Page D-7 User’s Guide Parameter Value S-Register Auto-answer on ring Backspace character Carriage return character disabled ASCII 8 ASCII 13 S0=0 S5=8 S3=13 Not used by 7400B Data Module Not used by 7400B Data Module Not used by 7400B Data Module — — — S9=6 S8=2 S11=95 DTR detection Escape sequence character Escape sequence guard time 0.05 sec. ASCII 43 1 sec.
APPENDIX D: QUICK-REFERENCE SUMMARIES Page D-8 DEFINITY Communications System 7400B Data Module User’s Guide Circuit Direction Function 1 2 3 4 5 — BA (SD) BB (RD) CA (RTS) CB (CTS) — to 7400B from 7400B to 7400B from 7400B not used transmit data receive data request to send clear to send 6 7 8 9 10 CC (DSR) AB (SG) CF (RLSD) — — from 7400B common from 7400B — — data set ready signal ground receive line signal detector not used not used 11 12* 13 14 15 — CI — — — — from 7400B — — — not used
APPENDIX D: QUICK-REFERENCE SUMMARIES DEFINITY Communications System 7400B Data Module Page D-9 User’s Guide ASCII VALUE CONTROL CHARACTER KEY ASCII VALUE 000 001 002 003 004 005 006 007 008 009 010 011 012 013 014 015 016 017 018 019 020 021 022 023 024 025 026 027 028 029 030 031 NUL SOH STX ETX EOT ENQ ACK BEL BS HT LF VT FF CR SO SI DLE DC1 DC2 DC3 DC4 NAK SYN ETB CAN EM SUB ESC FS GS RS US Ctrl-@ Ctrl-A Ctrl-B Ctrl-C Ctrl-D Ctrl-E Ctrl-F Ctrl-G Ctrl-H Ctrl-I Ctrl-J Ctrl-K Ctrl-L Ctrl-M Ctrl-N
DEFINITY Communications System 7400B Data Module User’s Guide APPENDIX D: QUICK-REFERENCE SUMMARIES Page D-10 ASCII VALUE 064 065 066 067 068 069 070 071 072 073 074 075 076 077 078 079 080 081 082 083 084 085 086 087 088 089 090 091 092 093 094 095 CONTROL CHARACTER KEY ASCII VALUE @ A B C D E F G H I J K L M N O P Q R S T U V W X Y Z [ \ ] ^ 096 097 098 099 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 — TABLE D-6 ASCII CHARACTER S
DEFINITY Communications System GLOSSARY 7400B Data Module User’s Guide Page GL-1 GLOSSARY ANSI display protocol. A standard set of escape sequences, established by ANSI (the American National Standards Institute), used by many display terminal devices to transmit or receive display control functions, such as cursor movement and color or graphics configuration parameters. Asynchronous data communications.
DEFINITY Communications System 7400B Data Module GLOSSARY User’s Guide Page GL-2 Data metering. A selectable feature of the 7400B Data Module that allows the device and its associated terminal to operate at a higher speed than the remote system to which it is connected. Data mode. See on-line mode. Data options.
GLOSSARY DEFINITY Communications System 7400B Data Module User’s Guide Page GL-3 Linked mode. A DIP-switch selected operating mode in which the 7400B Data Module supports both data and voice services. On-line mode. An operating mode in which the 7400B Data Module transmits all characters coming from its associated terminal device and does not attempt to interpret them as commands. Also called data mode. See also command mode. Option profiles. See configuration profiles. Script files. See command files.
DEFINITY Communications System INDEX 7400B Data Module User’s Page Index-1 INDEX A Adjunct equipment, 2-1 power adapter, 2-1 power supply, 2-1 Crosstalk XVI, C-8 PBX, C-1 PC software, C-1 Procomm Plus, C-2 Relay Gold, C-5 ASCII character backspace, B-6, 4-4 carriage return, B-5 character set, 4-4 dialing string, A-4 escape sequence, B-4 line feed, B-5 D-9 AT command prefix, 2-12 AT command set, A-1, 1-1 AT commands, 3-2 +++, B-4, 3-4, 5-1 A, A-3 A/, A-4, 3-2, 4-7 buffer, 4-3 &C, A-11, 4-6, 4-9 command
DEFINITY Communications System 7400B Data Module INDEX User’s Page Index-2 DCP, see Digital Communications Protocol DEFINITY Communications System, Generic 1, 1-1 DEFINITY Communications System, Generic 2, 1-1 Dialing directory, 2-5 example, 3-4 Digital Communications Protocol, 1-1 DIP switch options, 1-1, 2-6 Display problems, 3-6 DTE, see Data Terminal Device DTR lead, 5-7 Duplex full, A-6, 5-3 half, A-6, 5-3 E EIA-232-D, 1-1, 2-1 pin assignments, D-8 Errors, data, 5-6 Escape sequence, 3-4, 4-6 F Fa
INDEX DEFINITY Communications System 7400B Data Module Page Index-3 User’s PC software Crosstalk XVI, C-8 Procomm Plus, C-2 Relay Gold, C-5 Plotter, 2-5 Power supply, 1-4, 1-5, 2-11 Power-up self-test, 2-12 Printer, 2-5 Profile active, 4-1 configuration, A-15, A-17, 4-1 stored, A-10 T Telephone, 1-1, 1-4 number storage, A-4, 4-7 option, 2-6 Terminal, dedicated, 2-12, 3-2 Terminal device, 1-1, 1-4, 2-1 Terminal mode, 2-5 Terminal, PC, 2-12 Terminal, voice, 1-1, 1-4 Test local loopback, 2-7, 5-5 power-up
AT&T AT&T Bell Laboratories subject: Errata Sheets for 7400B Data Module User’s Guide date: December 11, 1990 from: Sandra Talarico MT XGPK20000 2E-401 x957-6072 The attached five errata sheets contain modifications to the 7400B Data Module User’s Guide, order number 555-020-707 Issue 1 November 1989. Please disregard the earlier memo containing errata sheets for the same document. The sheets attached to this memo replace any and all errata sheets. The attached errata sheets contain: ● U.L.
IMPORTANT SAFETY INSTRUCTIONS When using your telephone equipment, basic safety precautions should always be followed to reduce the risk of fire, electric shock and injury to persons, including the following: ● Read and understand all instructions. ● Follow all warnings and instructions marked on the product. ● ● ● ● ● ● ● ● This product can be hazardous if immersed in water. To avoid the possibility of electric shock, do not use when you are wet.
● ● ● Do not allow anything to rest on the power cord. Do not locate this product where the cord will be abused by people walking on it. Do not overload wall outlets and extension cords as this can result in the risk of fire or electric shock. Disconnect the cords on this product and refer servicing to qualified service personnel under the following conditions: A. When the power supply cord or plug is damaged or frayed. B. If liquid has been spilled into the product. C.
IMPORTANT INSTALLATION SAFETY INSTRUCTIONS WARNING When this product is located in a separate building from the telephone communications system, a line current protector MUST be installed at the entry/exit points of ALL buildings through which the line passes. The following are the ONLY acceptable devices for use in this application: ★ AT&T 4-type procetors ★ ITW LINX™ LP-type protectors Never install telephone wiring during a lightning storm.
1. The voltage measured from Phase to Neutral should be 110 to 125 VAC. 2. The voltage measured from Phase to Ground should be 110 to 125 VAC. 3. The voltage measured from Neutral to Ground should be less than 1 VAC. If the receptacle is not a properly grounded 3-prong type, stop the installation. Installation can only be completed after a qualified electrician corrects the problem.
