Lucent Technologies 7400B manual AT Command Subset Contd, Connect

Page 27

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. If you

 

need to return to the command mode, leave the keyboard

 

idle for at least one second, and then type +++ without

 

pressing [ Enter ]. Within a few seconds, the data module

 

will respond with OK, signifying that it has entered the

 

command mode and is waiting for you to type a

 

command.

 

Whether OK is returned or not depends on the setting of

 

certain parameters. If the factory-default settings are in

 

effect, OK should be returned.

O

The return to On-line command. After using the +++

 

escape sequence to enter command mode, you can type

 

ato and press [ Enter ] to return to on-line mode.

 

Note: This command will not work if you have

 

disconnected the data call.

H

The hang up or disconnect command. After using the

 

+++ escape sequence to enter command mode, you can

 

type ath and press [ Enter ] to disconnect the data call.

&F

The return to Factory-default settings command. If an

 

experimental change of your data module settings

 

produces unexpected results — and you are not sure how

 

to get out of the fix — type AT&F and press [ Enter ]. This

 

will return all configuration parameters back to the

 

factory-default settings.

TABLE 3-2 AT Command Subset (Contd.)

SAMPLE COMMAND LINES This section presents a few sample AT command lines with explanations of the results they will produce.

EXAMPLE 1: Dialing a number.

at d 5551212 [ Enter ]

CONNECT 2400

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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 Guide TypographicalConventions Organization of thisRelated Troubleshooting. Describes procedures forAppendix C Application Notes. Contains notes on how to Appendix D Quick-Reference Summaries. Contains quickIntroduction Front Panel External FeaturesFront Panel LED Indicator Descriptions Connector DescriptionRear Panel Rear Panel Connector DescriptionsPower Supply Unit Hardware SoftwareRequirements Typical Standalone Installation Typical Installation with Telephone Installation Installation With/Without Telephone Option SW1-1 Selecting DIP-Switch OptionsInstallation Data Metering Option SW1-5Make Busy on Local Loop Option SW1-8 Data Metering SW1-5 Factory-defaultOption DIP Switch Settings Telephone SW1-1Accessing the Hardware Option Switches Connecting the EIA-232-D Cable Supply Connecting the PowerDedicated Terminal Power-Up Self-TestIf YOU are Using a PC If YOU are Using aData Bits Parity Stop Bits Line or data modeOperating Modes Character FormatsEssential AT Commands AT Command Description AT Command SubsetMore Connect AT Command Subset ContdBusy Starting the Session Sample ON-LINE SessionSelection +++ No CarrierConfiguration Parameters Operation and ConfigurationCommand Line Action Command Line Set Up Issuing CommandsCommand Line Prefix Command BufferAts3= ddd Enter Result Codes CommandAcknowledgement Verbose Form Numeric DescriptionMultiple Characters From Data Mode to Command Mode and Back Dialing a NumberFollowing is an example At&z m=nnn...n Enter Commands for Using Stored Telephone NumbersReset Configuration RecallRemote Site USE At&f Enter Chapter HOW to USE thisPBX Symptom Problem SolutionCheck Speed LED At&d2 Enter Terminate the local loopback test by typing Atq0 o Enter Atx4 Enter LabelDescription Appendix a AT Command SETContd Escape sequence Immediate None CommandA Arguments noneArguments none Registernone Examplea CommandD Command Function Switch hook control Ato Enter Command Function Type Arguments Register Example CommentsAtv Enter A-10 User’s Guide Reset and recall a stored profile Data Carrier Detect DCD options Data Terminal Ready DTR options Arguments none Registernone Example Command&FAt&t3 Enter see comment At&v Enter Registernone Example Command&YAt&z2=555-1212 Enter 055 Description Range Values Comments See Also Register Description StorableStorable Comments From a data terminal Register S6 not used Register S8 not used S9 not used Register S13 not used Register S11 not usedRegister S15 not used Register Description Range Values Storable Comments See AlsoRegister S17 not used Register S19 not used S20 not used Values StorableRange of Values Storable Comments See Also RegisterS21Bits 0 and 1 not used default = 2, see comment Register S24 not used Register S27 not used AT&T 7400B Data Module PC Application Guide, ordering number PBX Application Notes PC Applications GuideSelect Result Messages Configuring the SoftwareProcomm Plus Select Modem OptionsPlacing a Call Select Save Setup OptionsC-4 Disconnecting CallRelay Gold Placing a Call DirectlySelect Call a Host Attmail DirectoryPress Esc to return to the Online menu as shown below Disconnecting a CallSelect the letter next to Hayes Smartmodem all models CrosstalkSelect the baud rate that you will use most often Bye Enter Appendix D QUICK-REFERENCE Summaries Command Description Table D-1 AT Command SETSr=n Table D-1 AT Command SET Contd Table D-2 S-REGISTER Summary Register Description Range/UnitTable D-3 Result Codes ConnectedParameter Value AT Command Table D-4 FACTORY-DEFAULT ConfigurationR e Parameter Value Register Table D-4 FACTORY-DEFAULT Configuration ContdTable D-5 EIA-232-D PIN Assignments Pin Circuit Direction FunctionTable D-6 Ascii Character SET Ascii Control KEY Value CharacterTable D-6 Ascii Character SET Contd Glossary Glossary Script files. See command files Index Data Metering DTE, see Data Terminal Device DTR leadRear panel, 1-4Remote site use AT&T Important Safety Instructions Page Important Installation Safety Instructions

7400B specifications

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