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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.
CONTENTS PREFACE: ABOUT THIS GUIDE Typographical Conventions i Organization of This Guide i Related Documentation ii 1 CHAPTER 1: INTRODUCTION External Features 1-2 2 CHAPTER 2: INSTALLATION Hardware .
CHAPTER 5: TROUBLESHOOTING 5 How to Use This Chapter 5-1 APPENDIX A: AT COMMAND SET A B APPENDIX B: S-REGISTERS C APPENDIX C: APPLICATION NOTES PBX Application Notes C-1 PC Applications Guide C-1 Proc.
DEFINITY Communications System PREFACE: ABOUT THIS GUIDE 7400B Data Module User’s Guide Page i TYPOGRAPHICAL CONVENTIONS PREFACE: ABOUT THIS GUIDE The purpose of this guide is to provide information for installing, operating, and maintaining the 7400B Data Module.
PREFACE: ABOUT THIS GUIDE DEFINITY Communications System 7400B Data Module Page ii User’s Guide outs, ASCII character set. RELATED DOCUMENTATION Chapter 5: Troubleshooting. Describes procedures for troubleshooting problems that may be encountered while configuring and operating the 7400B Data Module.
DEFINITY Communications System CHAPTER 1: INTRODUCTION 7400B Data Module User’s Guide Page 1-1 CHAPTER 1: INTRODUCTION This chapter discusses the basic operating features of the 7400B Data Module and describes the external indicators and connectors.
CHAPTER 1: INTRODUCTION DEFINITY Communications System 7400B Data Module Page 1-2 User’s Guide ● ● ● data metering option programmable control characters self-test at start-up local and remote.
DEFINITY Communications System CHAPTER 1: INTRODUCTION 7400B Data Module User’s Guide Page 1-3 Connector Description POWER/ TEST DATA METERING A A CD RD SD TR OH CHECK SPEED DATA 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.
CHAPTER 1: INTRODUCTION DEFINITY Communications System 7400B Data Module Page 1-4 User's Guide 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.
DEFINITY Communications System CHAPTER 1: INTRODUCTION 7400B Data Module User’s Guide Page 1-5 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.
DEFINITY Communications System CHAPTER 2: INSTALLATION 7400B Data Module User’s Guide Page 2-1 HARDWARE AND SOFTWARE REQUIREMENTS 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.
CHAPTER 2: INSTALLATION DEFINITY Communications System 7400B Data Module User’s Guide Page 2-2 PERSONAL COMPUTER 7400B DATA MODULE D8W CORD PBX WALL JACK EIA CABLE POWER SUPPLY Figure 2-1.
DEFINITY Communications System CHAPTER 2: INSTALLATION 7400B Data Module User’s Guide Page 2-3 Figure 2-2. Typical Installation with Telephone.
CHAPTER 2: INSTALLATION DEFINITY Communications System 7400B Data Module Page 2-4 User’s Guide Figure 2-3. Typical Installation with Telephone and Adjunct Equipment Requiring Auxiliary Power.
DEFINITY Communications System CHAPTER 2: INSTALLATION 7400B Data Module User’s Guide Page 2-5 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.
CHAPTER 2: INSTALLATION DEFINITY Communications System 7400B Data Module Page 2-6 User’s Guide ● Predefine data options profiles. Some programs include completely defined data option profiles (also called configuration profiles) for popular modems.
DEFINITY Communications System CHAPTER 2: INSTALLATION 7400B Data Module User’s Guide Page 2-7 HARDWARE INSTALLATION 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.
CHAPTER 2: INSTALLATION DEFINITY Communications System 7400B Data Module Page 2-8 User’s Guide Setting the Hardware Three hardware options are selected by setting switches on an internal Option DIP Switches 8-position DIP switch.
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.
CHAPTER 2: INSTALLATION DEFINITY Communications System 7400B Data Module Page 2-10 User’s Guide Caution: Disconnect all cables and telephone cords attached at the rear of the unit. Failure to disconnect all cables and 1. b. 2. 3. 4. 5. 6. cords at this point could result in permanent damage to the 7400B Data Module.
DEFINITY Communications System CHAPTER 2: INSTALLATION 7400B Data Module User’s Guide Page 2-11 2. Connecting the DCP Cord 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.
CHAPTER 2: INSTALLATION DEFINITY Communications System 7400B Data Module Page 2-12 User’s Guide INITIAL SYSTEM CHECKS This section describes procedures for initially checking out your hardware and any required software.
DEFINITY Communications System CHAPTER 3: FIRST TIME USERS 7400B Data Module User’s Guide Page 3-1 OPERATING MODES CHAPTER 3: FIRST TIME USERS This chapter provides some basics on 7400B Data Module .
CHAPTER 3: FIRST TIME USERS DEFINITY Communications System 7400B Data Module Page 3-2 User’s Guide ESSENTIAL AT COMMANDS 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.
DEFINITY Communications System CHAPTER 3: FIRST TIME USERS 7400B Data Module User’s Guide Page 3-3 AT Command Description AT The command prefix that must be typed as the first two letters of all AT commands except +++ and A/. This prefix gets the tention of the data module.
CHAPTER 3: FIRST TIME USERS DEFINITY Communications System 7400B Data Module Page 3-4 User’s Guide 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.
DEFINITY Communications System CHAPTER 3: FIRST TIME USERS 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.
CHAPTER 3: FIRST TIME USERS DEFINITY Communications System 7400B Data Module Page 3-6 User’s Guide 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.
DEFINITY Communications System CHAPTER 3: FIRST TIME USERS 7400B Data Module User’s Guide Page 3-7 Another possible problem is that the remote end response contains normal words mixed in with strange characters, many of which are left brackets ([).
DEFINITY Communications System CHAPTER 4: OPERATION AND CONFIGURATION 7400B Data Module User’s Guide Page 4-1 CHAPTER 4: OPERATION AND CONFIGURATION This chapter describes how to change, store, and .
CHAPTER 4: OPERATION AND CONFIGURATION DEFINITY Communications System 7400B Data Module Page 4-2 User’s Guide Command Line: Action: at&f [ Enter ] Recall the factory-default configuration settings into the active profile.
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.
CHAPTER 4: OPERATION AND CONFIGURATION DEFINITY Communications System 7400B Data Module Page 4-4 User’s Guide Note: A special application may require choosing a different line terminating character,.
DEFINITY Communications System CHAPTER 4: OPERATION AND CONFIGURATION 7400B Data Module User’s Guide Page 4-5 Command Most commands are acted upon immediately and are acknowledged by Acknowledgement 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 Page 4-6 User’s Guide Multiple Characters If you type in the at prefix and it displays on your screen as aatt,.
DEFINITY Communications System CHAPTER 4: OPERATION AND CONFIGURATION 7400B Data Module User’s Guide Page 4-7 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.
CHAPTER 4: OPERATION AND CONFIGURATION DEFINITY Communications System 7400B Data Module Page 4-8 User’s Guide Command line: Action: at&z Store number nnn...n in location m, which is one of four locations designated by the numbers 0 through 3. For m=nnn.
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.
CHAPTER 4: OPERATION AND CONFIGURATION DEFINITY Communications System 7400B Data Module Page 4-10 User’s Guide 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.
DEFINITY Communications System CHAPTER 5: TROUBLESHOOTING 7400B Data Module User’s Guide Page 5-1 CHAPTER 5: TROUBLESHOOTING This chapter describes procedures for troubleshooting most problems that may be encountered while installing, configuring, and operating the 7400B Data Module.
CHAPTER 5: TROUBLESHOOTING DEFINITY Communications System 7400B Data Module Page 5-2 User’s Guide 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.
DEFINITY Communications System CHAPTER 5: TROUBLESHOOTING 7400B Data Module User’s Guide Page 5-3 Symptom Problem Solution Call disconnects The speed of the far end immediately after an device is higher than the attempt to connect; NO speed of the local terminal CARRIER may be device.
CHAPTER 5: TROUBLESHOOTING DEFINITY Communications System 7400B Data Module Page 5-4 User’s Guide Symptom Problem Solution The PC communications The data module has software indicates that the ignored the on-to-off call has been transition of the DTR disconnected, but the lead.
DEFINITY Communications System CHAPTER 5: TROUBLESHOOTING 7400B Data Module User’s Guide Page 5-5 Symptom Problem Solution The AA LED flashes but The automatic answer the data module does not option is not enabled; automatically answer the when there is no incoming incoming call.
CHAPTER 5: TROUBLESHOOTING DEFINITY Communications System 7400B Data Module Page 5-6 User’s Guide Symptom Problem Solution Transmitted and/or Speed settings of the Change terminal device speed to received data contains terminal device and the agree with the speed that was errors.
DEFINITY Communications System CHAPTER 5: TROUBLESHOOTING 7400B Data Module User’s Guide Page 5-7 Symptom Problem Solution Commands are displayed The local terminal device Set the terminal device fo.
DEFINITY Communications System APPENDIX A: AT COMMAND SET 7400B Data Module User’s Guide Page A-1 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.
APPENDIX A: AT COMMAND SET DEFINITY Communications System 7400B Data Module Page A-2 User’s Guide Label 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.
DEFINITY Communications System APPENDIX A: AT COMMAND SET 7400B Data Module User’s Guide Page A-3 Command: Function: Type: Arguments: S-Register: Example: Comments: See Also: +++ Escape sequence.
APPENDIX A: AT COMMAND SET DEFINITY Communications System 7400B Data Module Page A-4 User's Guide Command: Function: Type: Arguments: S-Register: Example: Comments: See Also: A Go off-hook in Answer mode.
DEFINITY Communications System APPENDIX A: AT COMMAND SET 7400B Data Module User’s Guide Page A-5 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.
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: Example 2: atd555–1212 [ Enter ] atds=1 [ Enter ] Comments: In example 1, the number 555-1212 is dialed.
DEFINITY Communications System APPENDIX A: AT COMMAND SET 7400B Data Module User’s Guide Page A-7 Command: Function: Type: Arguments: S-Register: Example: Comments: ath [ Enter ] See Also: H Switch hook control. immediate No argument or an argument of 0 causes the data module to go on- hook.
APPENDIX A: AT COMMAND SET DEFINITY Communications System 7400B Data Module Page A-8 User’s Guide 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.
DEFINITY Communications System APPENDIX A: AT COMMAND SET 7400B Data Module User's Guide Page A-9 Command: Function: Type: Arguments: S-Register: Example: Comments: atq1 [ Enter ] See Also: Q Turn the display of result codes on or off.
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.
DEFINITY Communications System APPENDIX A: AT COMMAND SET 7400B Data Module User’s Guide Page A-11 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 Page A-12 User’s Guide Command: &C Function: Data Carrier Detect (DCD) options.
DEFINITY Communications System APPENDIX A: AT COMMAND SET 7400B Data Module User’s Guide Page A-13 Command: Function: Type: Arguments: S-Register: Example: Comments: at&d2 [ Enter ] See Also: &D Data Terminal Ready (DTR) options.
APPENDIX A: AT COMMAND SET DEFINITY Communications System 7400B Data Module Page A-14 User’s Guide Command: Function: Type: Arguments: S-Register: Example: Comments: See Also: &F Load the factory-default configuration.
DEFINITY Communications System APPENDIX A: AT COMMAND SET 7400B Data Module User’s Guide Page A-15 Command: &T Function: Control diagnostic and test facilities.
APPENDIX A: AT COMMAND SET DEFINITY Communications System 7400B Data Module Page A-16 User’s Guide Command: Function: Type: Arguments: S-Register: Example: Comments: at&v [ Enter ] ● ● ● See Also: &V View the active configuration and stored profiles.
DEFINITY Communications System APPENDIX A: AT COMMAND SET 7400B Data Module User’s Guide Page A-17 Command: Function: Type: Arguments: S-Register: Example: Comments: at&w0 [ Enter ] See Also: &W Store the active configuration profile. immediate No argument or an argument of 0 stores to location 0, an argument of 1 stores to location 1.
APPENDIX A: AT COMMAND SET DEFINITY Communications System 7400B Data Module Page A-18 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.
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.
APPENDIX B: S-REGISTERS DEFINITY Communications System 7400B Data Module Page B-2 User’s Guide 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.
DEFINITY Communications System APPENDIX B: S-REGISTERS 7400B Data Module User’s Guide Page B-3 Label 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.
APPENDIX B: S-REGISTERS DEFINITY Communications System 7400B Data Module Page B-4 User’s Guide Register: S0 Description: The value in this S-register represents the ring number on which an incoming call will be automatically answered. Range of The value may be 000 through 255 rings.
DEFINITY Communications System APPENDIX B: S-REGISTERS 7400B Data Module User’s Guide Page B-5 Register: Description: Range of Values: Storable: Comments: See Also: S2 This S-register stores the ASCII value of the escape sequence character.
APPENDIX B: S-REGISTERS DEFINITY Communications System 7400B Data Module Page B-6 User’s Guide Register: S4 Description: This S-register holds the ASCII value for the line feed character. Range of Value may be 000 through 127; factory default setting is 010, usually Values: output by the Ctrl-J key combination from a display terminal.
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 Value may be 001 through 055 seconds; factory-default value is 030 Values: seconds.
APPENDIX B: S-REGISTERS DEFINITY Communications System 7400B Data Module Page B-8 User’s Guide 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).
DEFINITY Communications System APPENDIX B: S-REGISTERS 7400B Data Module User’s Guide Page B-9 Register: S14 Description: This S-register is used to store the status of bit-mapped options as follows.
APPENDIX B: S-REGISTERS DEFINITY Communications System 7400B Data Module Page B-10 User’s Guide Register: S16 Description: This S-register stores test function status in a bit-mapped format as follo.
DEFINITY Communications System APPENDIX B: S-REGISTERS 7400B Data Module User’s Guide Page B-11 Register: S18 Description: The value in this S-register establishes the duration of diagnostic tests initiated by the &T command. Range of Value may be 000 through 255 seconds.
2. APPENDIX B: S-REGISTERS DEFINITY Communications System 7400B Data Module Page B-12 User’s Guide Register: S21 Description: This S-register is used to store the status of bit-mapped options as fol.
DEFINITY Communications System APPENDIX B: S-REGISTERS 7400B Data Module User’s Guide Page B-13 Register: S22 Description: This S-register is used to store the status of bit-mapped options as follow.
APPENDIX B: S-REGISTERS DEFINITY Communications System 7400B Data Module Page B-14 User’s Guide Register: S23 Description: This S-register is used to store the status of bit-mapped options as follow.
DEFINITY Communications System APPENDIX B: S-REGISTERS 7400B Data Module User’s Guide Page B-15 Register: Description: S25 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.
DEFINITY Communications System APPENDIX C: APPLICATION NOTES 7400B Data Module User’s Guide Page C-1 APPENDIX C: APPLICATION NOTES PBX APPLICATION NOTES PC APPLICATIONS GUIDE This appendix provides .
APPENDIX C: APPLICATION NOTES DEFINITY Communications System 7400B Data Module Page C-2 User’s Guide PROCOMM PLUS Procomm Plus is a data communications software package produced by Configuring the Software 1 . Datastorm Technologies, Inc. The following procedures are based on version 1.
DEFINITY Communications System APPENDIX C: APPLICATION NOTES 7400B Data Module User’s Guide Page C-3 A – B – C – D – E – PROCOMM PLUS SETUP UTILITY MODEM RESULT MESSAGES 300 baud connect message . . . . . . CONNECT 1200 baud connect message .
APPENDIX C: APPLICATION NOTES DEFINITY Communications System 7400B Data Module Page C-4 User’s Guide DIALING DIRECTORY: PCPLUS NAME NUMBER SCRIPT 1 2400 N-8-1 F 2 2400 N-8-1 F 3 2400 N-8-1 F 4 2400 .
DEFINITY Communications System APPENDIX C: APPLICATION NOTES 7400B Data Module User’s Guide Page C-5 RELAY GOLD Relay Gold is a data communications software package produced by Relay Communications, Inc. The following procedures are based on release 3.
APPENDIX C: APPLICATION NOTES DEFINITY Communications System 7400B Data Module Page C-6 User’s Guide 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. Placing a Call Through the This example uses ATTMAIL as the system to be called.
DEFINITY Communications System APPENDIX C: APPLICATION NOTES 7400B Data Module User’s Guide Page C-7 7 . 8. 9. Make any necessary changes in the appropriate fields. Press [ Enter ] to save changes to the PC hard disk and display the Directory of Computers screen.
APPENDIX C: APPLICATION NOTES DEFINITY Communications System 7400B Data Module Page C-8 User’s Guide CROSSTALK XVI Crosstalk XVI is a data communications software package produced by Digital Communications Associates.
DEFINITY Communications System APPENDIX C: APPLICATION NOTES 7400B Data Module User’s Guide Page C-9 8. 9. 10. 11. Select the baud rate that you will use most often.* Select the type of video display used in your PC.* Press [ Y ] to save the new configuration settings to the hard disk of the PC.
APPENDIX C: APPLICATION NOTES DEFINITY Communications System 7400B Data Module Page C-10 User’s Guide 3. For a listed service: a. Enter the telephone number (for example, 5551234 or 9,5551234). Enter the baud rate (for example, 300, 1200, 2400). b. c.
DEFINITY Communications System APPENDIX D: QUICK-REFERENCE SUMMARIES 7400B Data Module User’s Guide Page D-1 APPENDIX D: QUICK-REFERENCE SUMMARIES This appendix contains quick-reference summaries fo.
APPENDIX D: QUICK-REFERENCE SUMMARIES DEFINITY Communications System 7400B Data Module Page D-2 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.
DEFINITY Communications System APPENDIX D: QUICK-REFERENCE SUMMARIES 7400B Data Module User’s Guide Page D-3 Command Description &C0 &C1 &D0 &D1 &D2 &D3 &F &S0 &S.
APPENDIX D: QUICK-REFERENCE SUMMARIES DEFINITY Communications System 7400B Data Module Page D-4 User’s Guide Register Description Range/Unit S0 Ring to answer on. 000-255 count S1 Incoming ring count. 000-255 count S2 Escape sequence character. 000-127 ASCII S3 Carriage return character.
DEFINTY Communications System APPENDIX D: QUICK-REFERENCE SUMMARIES 7400B Data Module User’s Guide Page D-5 Verbose Form Numeric Description OK 0 CONNECTED 1 RING NO CARRIER ERROR CONNECT 1200 NO DI.
APPENDIX D: QUICK-REFERENCE SUMMARIES DEFINITY Communications System 7400B Data Module Page D-6 User’s Guide Value AT Command Parameter Command state echo Communication mode Default user profile DCD.
DEFINITY Communications System APPENDIX D: QUICK-REFERENCE SUMMARIES 7400B Data Module User’s Guide Page D-7 Parameter Value S-Register Auto-answer on ring disabled S0=0 Backspace character ASCII 8 .
APPENDIX D: QUICK-REFERENCE SUMMARIES DEFINITY Communications System 7400B Data Module Page D-8 User’s Guide Pin Circuit Direction Function 1 — — not used 2 BA (SD) to 7400B transmit data 3 BB (.
DEFINITY Communications System APPENDIX D: QUICK-REFERENCE SUMMARIES 7400B Data Module User’s Guide Page D-9 ASCII CONTROL KEY VALUE CHARACTER 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 ! " # $ % & ' ( ) * - .
APPENDIX D: QUICK-REFERENCE SUMMARIES DEFINITY Communications System 7400B Data Module Page D-10 User’s Guide ASCII CONTROL KEY VALUE CHARACTER 064 065 066 067 068 069 070 071 072 073 074 075 076 07.
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 Standa.
GLOSSARY DEFINITY Communications System 7400B Data Module Page GL-2 User’s Guide 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.
DEFINITY Communications System GLOSSARY 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.
DEFINITY Communications System INDEX 7400B Data Module User’s Page Index-1 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-.
INDEX DEFINITY Communications System 7400B Data Module Page Index-2 User’s DCP, see Digital Communications Protocol DEFINITY Communications System, Generic 1, 1-1 DEFINITY Communications System, Gen.
DEFINITY Communications System INDEX 7400B Data Module User’s Page Index-3 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-te.
AT&T AT&T Bell Laboratories subject: Errata Sheets for 7400B Data Module User’s Guide date: from: December 11, 1990 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.
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.
● 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.
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.
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.
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