Lucent Technologies 7400B manual At&d2 Enter

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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.
DATA LED remains lit.

The data module has ignored the H (hang-up) command.

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. Alternatively, determine and use the command provided by the communications software to implement this change.

Ensure that after the escape sequence (+++) has been entered to switch the data module to command mode, an adequate pause is allowed before issuing the H command. In escaping to command mode with the result codes enabled, the data module must be given time to return OK or 0 before it is ready to accept a command.

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Contents AT&T 7400B Data Module To Order Copies of this Manual Contents Preface about this Guide 1C-1C-2C-5C-8 Typographical ConventionsOrganization of this GuideTroubleshooting. Describes procedures for Appendix C Application Notes. Contains notes on how toAppendix D Quick-Reference Summaries. Contains quick RelatedIntroduction External Features Front PanelConnector Description Front Panel LED Indicator DescriptionsRear Panel Connector Descriptions Rear PanelPower Supply Unit Requirements HardwareSoftware Typical Standalone Installation Typical Installation with Telephone Installation Installation Selecting DIP-Switch Options With/Without Telephone Option SW1-1Make Busy on Local Loop Option SW1-8 InstallationData Metering Option SW1-5 Factory-default Option DIP Switch SettingsTelephone SW1-1 Data Metering SW1-5Accessing the Hardware Option Switches Connecting the EIA-232-D Cable Connecting the Power SupplyPower-Up Self-Test If YOU are Using a PCIf YOU are Using a Dedicated TerminalLine or data mode Operating ModesCharacter Formats Data Bits Parity Stop BitsEssential AT Commands More AT Command DescriptionAT Command Subset AT Command Subset Contd ConnectBusy Sample ON-LINE Session Starting the SessionNo Carrier Selection +++Operation and Configuration Configuration ParametersCommand Line Action Issuing Commands Command Line PrefixCommand Buffer Command Line Set UpAts3= ddd Enter Command AcknowledgementVerbose Form Numeric Description Result CodesFrom Data Mode to Command Mode and Back Dialing a Number Multiple CharactersFollowing is an example Commands for Using Stored Telephone Numbers At&z m=nnn...n EnterRemote Site USE ResetConfiguration Recall At&f Enter HOW to USE this ChapterSymptom Problem Solution PBXCheck Speed LED At&d2 Enter Terminate the local loopback test by typing Atq0 o Enter Atx4 Enter Appendix a AT Command SET LabelDescriptionContd Escape sequence Immediate None Arguments none Registernone Examplea CommandAArguments none CommandD Command Function Switch hook control Command Function Type Arguments Register Example Comments Ato EnterAtv Enter A-10 User’s Guide Reset and recall a stored profile Data Carrier Detect DCD options Data Terminal Ready DTR options Command&F Arguments none Registernone ExampleAt&t3 Enter see comment At&v Enter Command&Y Registernone ExampleAt&z2=555-1212 Enter 055 Description Range Values Comments See Also Storable Comments Register DescriptionStorable From a data terminal Register S6 not used Register S8 not used S9 not used Register S11 not used Register S13 not usedRegister Description Range Values Storable Comments See Also Register S15 not usedRegister S17 not used Values Storable Register S19 not used S20 not usedRegisterS21 Range of Values Storable Comments See AlsoBits 0 and 1 not used default = 2, see comment Register S24 not used Register S27 not used PBX Application Notes PC Applications Guide AT&T 7400B Data Module PC Application Guide, ordering numberConfiguring the Software Procomm PlusSelect Modem Options Select Result MessagesSelect Save Setup Options Placing a CallDisconnecting Call C-4Select Call a Host Relay GoldPlacing a Call Directly Directory AttmailDisconnecting a Call Press Esc to return to the Online menu as shown belowCrosstalk Select the letter next to Hayes Smartmodem all modelsSelect the baud rate that you will use most often Bye Enter Appendix D QUICK-REFERENCE Summaries Sr=n Command DescriptionTable D-1 AT Command SET Table D-1 AT Command SET Contd Register Description Range/Unit Table D-2 S-REGISTER SummaryConnected Table D-3 Result CodesR e Parameter Value AT CommandTable D-4 FACTORY-DEFAULT Configuration Table D-4 FACTORY-DEFAULT Configuration Contd Parameter Value RegisterPin Circuit Direction Function Table D-5 EIA-232-D PIN AssignmentsAscii Control KEY Value Character Table D-6 Ascii Character SETTable D-6 Ascii Character SET Contd Glossary Glossary Script files. See command files Index DTE, see Data Terminal Device DTR lead Data MeteringRear panel, 1-4Remote site use AT&T Important Safety Instructions Page Important Installation Safety Instructions