Synchronous Access Mode Commands

Chapter 4 - V.22bis Commands

Error Control and Data Compression Commands

+ESR	Select Repeat
\B	Transmit Break to Remote
\K	Break Control
Synchronous Access Mode Commands
+ESA	Configure Synchronous Access Submode
+ITF	Transmit Flow Control Thresholds
Fast Connect Command
$F	Fast Connect Control
Line Side Device Commands
-TTE	Threshold Adjustments for Telephony Extension
-TRV	Tip and Ring Voltage Measurement

A Note About Compatibility Commands

You may notice that some commands are available but do not support any function. These commands exist for compatibility purposes only. If you enter these commands, you may receive an OK result; however, no changes are made to the configuration or control of the modem. Examples of these commands are:

Y, &S, &V1, +VDT, and \A,

Multi-Tech Systems, Inc. MT2456SMI-22 SocketModem Developer’s Guide

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Multi-Tech Systems MT2456SMI22 manual Error Control and Data Compression Commands, Synchronous Access Mode Commands

Contents

SocketModem Country By Email By Phone PN S000281A, Version a Contents Product Description Product Description Specifications Speed Conversion Technical Specifications Maximum Component Height Physical Dimensions Pin Descriptions Pin Configurations 3V DC Power Outputs Output High Output Low Handling Precautions3V and 5V Serial SocketModem Input High Input Low Modulation Control Commands Generic Modem Control CommandsDTE/DCE Commands Call Control Commands Line Side Device Commands Error Control and Data Compression CommandsSynchronous Access Mode Commands Fast Connect Command +VCID Caller ID CID 22bis Generic Modem Control CommandsSoft Reset and Restore Profile Operating Mode Identification +GCI Country of Installation Load to Internal RAM Restore Factory Configuration ProfileProcedure Local Analog Loopback Test Result Code Form 22bis DTE/DCE-Modem Interface commandsCommand Echo Quiet Result Codes Control Extended Result Codes Connect Ring No Carrier Error No Dial Tone Busy No Answer DTR Option Short Form Long Form Value in ATXn CommandRlsd Option Result Codes OK 0 or +IFC DTE-Modem Local Flow Control RTS/CTS Option\G Modem-to-Modem Flow Control XON/XOFF EM Shielding Data +IBC In Band CommandsEntering and Exiting In Band Active State Band Processing of AT Commands Command Hex Codes Description Supported DTE-to-DCE CommandsSupported DCE-to-DTE Commands Dial Modifiers 22bis Call Control CommandsDial Speaker Volume Set Tone Dial DefaultResult Code Set Pulse Dial Default Return to On-Line Data Mode Select Pulse Dial Make/Break Ratio Display Current Configuration and Stored ProfilesMSpeaker Control Select Guard Tone Display Blacklisted Numbers \V Single Line Connect Message EnableReport Line Signal Level Report Line Signal Quality Syntax *D Example Display Delayed NumbersNO. Phone Number -DELAY Behavior in Data Mode +VDR Distinctive Ring +PCW Call Waiting EnableReporting Selected Values Syntax 22bis Modulation Control CommandsTable of +MS Command Supported Rates +MS Modulation Selection ITU-T or Bell Enable/Disable Line Quality Monitor and Auto-Retrain \B Transmit Break to Remote 22bis Error Control and Data Compression Commands+ESR Selective Repeat +ETBM Call Termination Buffer Management Break Control Result Codes OK 0 to 5 Error Otherwise +ESA? 22bis Synchronous Access Mode Commands+ESA Configure Synchronous Access Submode Reporting Selected Options +ITF? Transmit Flow Control Thresholds Syntax $Fn Defined Values 22bis FastConnect Command$F Fast Connect Control Response 22bis Line Side Device CommandsThreshold Adjustments for Telephony Extension TRV Tip and Ring Voltage Measurement Read/Write S-Parameter 22bis S-Parameters Ascii Summary of S-Parameter DefaultsRegister Function Range/Units Default S3 Carriage Return Character S0 Number of Rings to Auto-AnswerS1 Ring Counter S2 Escape Character S9 Carrier Detect Response Time S8 Pause Time For Dial DelayS10 Lost Carrier To Hang Up Delay S12 Escape Prompt Delay EPD S21 V.24/General Bit Mapped Options Status S16 Test Mode Bit Mapped Options StatusS19 Reserved S20 Reserved S22 Speaker/Results Bit Mapped Options Status S24 Sleep Inactivity TimerS25 Delay To DTR Off S26 RTS to CTS Delay S29 Flash Dial Modifier Time S30 Disconnect Inactivity TimerS27 Bit Mapped Options Status S28 Bit Mapped Options Status S39 Flow Control Bit Mapped Options Status S38 Delay Before Forced Hang UpS36 Lapm Failure Control S37 Desired Line Connection Speed S86 Call Failure Reason Code S41 General Bit Mapped Options StatusS48 V.42 Negotiation Action S82 Break Handling Options S95 Extended Result Codes Control S91 Pstn Transmit Attenuation Level Connect 22bis Result CodesTable of Result Code Definitions Code Message Meaning 75TX/1200RX Is enabled Figure A-1. Serial Test/Demo Board Block Diagram Block Diagram More planned Product Safety and EMC ApprovalsCountry Certifications Country Country Code Hardware Considerations Regulatory Design Considerations Safety Qty Name Description SocketModem Placement Telecom Requirements for the United States ComplianceMulti-Tech Systems, Inc. Compliance Label Physical Characteristics Label Content and Format Other Label Requirements Telecommunications Regulations for CanadaLabeling Continuity and Changes Industry Canada New Zealand Telecom Warning Notice South African Statement EMC, Safety, and R&TTE Directive ComplianceInternational Modem Restrictions Index Index

Multi-Tech Systems MT2456SMI22 Error Control and Data Compression Commands, Fast Connect Command

Models: MT2456SMI22

Error Control and Data Compression Commands

Fast Connect Command

Line Side Device Commands

-TRV