Lucent Technologies 7400B manual Switch hook control

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DEFINITY Communications System	APPENDIX A: AT COMMAND SET
7400B Data Module
User’s Guide	Page A-7

Command:	H
Function:	Switch hook control.
Type:	immediate
Arguments:	No argument or an argument of 0 causes the data module to go on-
	hook.
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. An argument of 0
	produces the same result, and an argument of 1 is accepted but causes
	no action.
See Also:	The escape sequence command (+++); Chapter 4, “Operation and
	Configuration.”

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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 Hardware SoftwareRequirements Typical Standalone Installation Typical Installation with Telephone Installation Installation Selecting DIP-Switch Options With/Without Telephone Option SW1-1Installation Data Metering Option SW1-5Make 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 Description AT Command SubsetMore 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 EnterReset Configuration RecallRemote Site USE 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 CommandA Arguments none Arguments 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 Register Description StorableStorable 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-4Relay Gold Placing a Call DirectlySelect 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 Command Description Table D-1 AT Command SETSr=n Table D-1 AT Command SET Contd Register Description Range/Unit Table D-2 S-REGISTER SummaryConnected Table D-3 Result CodesParameter Value AT Command Table D-4 FACTORY-DEFAULT ConfigurationR 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