Lucent Technologies 7400B manual Atq0 o Enter

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DEFINITY Communications System

CHAPTER 5: TROUBLESHOOTING

Page 5-6

7400B Data Module User’s Guide

Symptom	Problem	Solution

Transmitted and/or received data contains errors.

Speed settings of the terminal device and the data module are not the same.

The local terminal device and the far end device are configured for different parity settings.

Far end data errors only during file transfer with PC data communication software.

Change terminal device speed to agree with the speed that was indicated in the C0NNECT nnnn message.

Change the parity setting of the local terminal device to match that of the far end device.

Disconnect the call, set the data metering option to off (see “Setting the Hardware Option DIP Switches” in Chapter 2), re- establish the call, and try the file transfer again.

The DATA LED is lit, but a CONNECT xxxx message or numeric result code was not displayed.

The display result codes option is turned off.

Turn on the display result codes option by typing

atq0 o [ Enter ]

The O command at the end of the above command line will cause the data module to return to the on-line mode and send the CONNECT xxxx message, or an equivalent numeric code, to the terminal display (see “Result Codes” in Appendix D).

Numeric code returned when CONNECT xxxx message is preferred.

The result code format option is set to numeric form.

Change the result code format option to message form by typing

atv1 [ Enter ]

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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 Organization of this TypographicalConventions GuideAppendix D Quick-Reference Summaries. Contains quick Troubleshooting. Describes procedures forAppendix C Application Notes. Contains notes on how to RelatedIntroduction External Features Front PanelConnector Description Front Panel LED Indicator DescriptionsRear Panel Connector Descriptions Rear PanelPower Supply Unit Software HardwareRequirements Typical Standalone Installation Typical Installation with Telephone Installation Installation Selecting DIP-Switch Options With/Without Telephone Option SW1-1Data Metering Option SW1-5 InstallationMake Busy on Local Loop Option SW1-8 Telephone SW1-1 Factory-defaultOption DIP Switch Settings Data Metering SW1-5Accessing the Hardware Option Switches Connecting the EIA-232-D Cable Connecting the Power SupplyIf YOU are Using a Power-Up Self-TestIf YOU are Using a PC Dedicated TerminalCharacter Formats Line or data modeOperating Modes Data Bits Parity Stop BitsEssential AT Commands AT Command Subset AT Command DescriptionMore AT Command Subset Contd ConnectBusy Sample ON-LINE Session Starting the SessionNo Carrier Selection +++Operation and Configuration Configuration ParametersCommand Line Action Command Buffer Issuing CommandsCommand Line Prefix Command Line Set UpAts3= ddd Enter Verbose Form Numeric Description CommandAcknowledgement 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 EnterConfiguration Recall ResetRemote Site USE At&f Enter HOW to USE this ChapterSymptom Problem Solution PBX Check 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 CommandAArguments none Registernone Examplea 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 Register DescriptionStorable Comments 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 numberSelect Modem Options Configuring the SoftwareProcomm Plus Select Result MessagesSelect Save Setup Options Placing a CallDisconnecting Call C-4Placing a Call Directly Relay GoldSelect Call a Host 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 Table D-1 AT Command SET Command DescriptionSr=n Table D-1 AT Command SET Contd Register Description Range/Unit Table D-2 S-REGISTER SummaryConnected Table D-3 Result CodesTable D-4 FACTORY-DEFAULT Configuration Parameter Value AT CommandR e 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