Multi-Tech Systems MT2456SMI22 manual Command Hex Codes Description Supported DTE-to-DCE Commands

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Chapter 4 - V.22bis Commands

 

Table of Supported V.80 Commands

 

 

 

Command

Hex Codes

Description

 

 

 

Supported

V.80 DTE-to-DCE Commands

 

 

<extend0> <length>

<40h>

The DCE decodes this as a sequence of 3 + (<length>-1Fh).

 

 

<control> <rest of command>

<42h>

 

 

 

<105off>

<42h>

Circuit 105 is OFF.

 

 

<105on>

<43h>

Circuit 105 is ON.

 

 

<singleEMp>

<58h>

The DCE decodes this as one <99h> in user data.

 

 

<doubleEMp>

<59h>

The DCE decodes this as <99h><99h> in user data.

 

 

<singleEM>

<5Ch>

The DCE decodes this as on <19h> in user data.

 

 

<doubleEM>

<5Dh>

The DCE decodes this as <19h><19h> in user data.

 

 

<poll>

<5Eh>

The DCE decodes this command and deliver a set of status

 

 

 

 

commands, one for each circuit enabled.

 

 

 

Supported

V.80 DCE-to-DTE Commands

 

 

<extend0> <length>

<60h>

The DCE decodes this as a sequence of 3 + (<length>-1Fh).

 

 

<status> <rest of command>

<62h>

 

 

 

<106off>

<62h>

Circuit 106 is OFF.

 

 

<106on>

<63h>

Circuit 106 is ON.

 

 

<125off>

<6Ah>

Circuit 125 is OFF.

 

 

<125on>

<6Bh>

Circuit 125 is ON.

 

 

<singleEMp>

<76h>

The DCE encodes this as one <99h> in user data.

 

 

<doubleEMp>

<77h>

The DCE encodes this as <99h><99h> in user data.

 

 

<singleEM>

<7Ch>

The DCE encodes this as on <19h> in user data.

 

 

<doubleEM>

<7Dh>

The DCE encodes this as <19h><19h> in user data.

 

In Band Processing of AT Commands

When in-band control sequences are enabled, the modem responds to EM shielded AT commands via the extend-0 CONTROL sequence. This command may be used to transmit any AT commands to the modem as follows:

EM <extend-0> <length> <CONTROL> <AT Command without AT and trailing carriage return>

Upon receipt of an in-band command, the modem responds with the extend-0 STATUS REPORT sequence. This sequence will contain the response to the AT command issued via the CONTROL sequence with the trailing <cr> <lf> omitted:

EM <extend-0> <length> <STATUS> <AT Command response without trailing LF> Example: Send +VRID=2 command to the modem and respond with terse caller ID:

EM <60h> <27h> <42h> +VRID=2

Note: <length> is 27h corresponding to 27h-1Fh=8. This is the length of the sequence following the <length> octet. The modem responds to this command by transmitting the caller ID information to the DTE via the in-band sequence:

EM <60h> <length> <62h> <raw caller ID information> EM<60h><22h><62h>OK

In this case, the <length> octet is the actual length of the raw caller ID + 1 + 1Fh.

In Band Signaling of CTS and Ring Indicate (Circuit 106 and Circuit 125)

Whenever the V.24 circuit selected via the +IBC command changes, the modem will send an unsolicited EM shielded frame to the DTE to inform the DTE of the new state. This is used for CTS and RI. For MOH applications, the DTE is specifically interested in circuit 125 (Ring Indicate).

When RI is asserted, the sequence EM <125on> or 19h 6Bh is sent to the DTE. When RI is de-asserted, the sequence EM <125off> or 19h 6Ah is sent to the DTE.

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

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Contents SocketModem PN S000281A, Version a Country By Email By PhoneContents Product Description Specifications Product DescriptionTechnical Specifications Speed ConversionPhysical Dimensions Maximum Component HeightPin Configurations Pin Descriptions3V DC Power Handling Precautions 3V and 5V Serial SocketModemInput High Input Low Outputs Output High Output LowGeneric Modem Control Commands DTE/DCE CommandsCall Control Commands Modulation Control CommandsError Control and Data Compression Commands Synchronous Access Mode CommandsFast Connect Command Line Side Device Commands22bis Generic Modem Control Commands Soft Reset and Restore ProfileOperating Mode +VCID Caller ID CID+GCI Country of Installation IdentificationRestore Factory Configuration Profile ProcedureLocal Analog Loopback Test Load to Internal RAM22bis DTE/DCE-Modem Interface commands Command EchoQuiet Result Codes Control Result Code FormConnect Ring No Carrier Error No Dial Tone Busy No Answer Extended Result Codes Short Form Long Form Value in ATXn Command Rlsd Option Result Codes OK 0 or DTR Option+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 Set Tone Dial Default Result Code Set Pulse Dial DefaultReturn to On-Line Data Mode Speaker VolumeDisplay Current Configuration and Stored Profiles MSpeaker ControlSelect Guard Tone Select Pulse Dial Make/Break Ratio\V Single Line Connect Message Enable Report Line Signal LevelReport Line Signal Quality Display Blacklisted NumbersDisplay Delayed Numbers NO. Phone Number -DELAYBehavior in Data Mode Syntax *D Example+VDR Distinctive Ring +PCW Call Waiting EnableReporting Selected Values 22bis Modulation Control Commands Table of +MS Command Supported Rates+MS Modulation Selection SyntaxEnable/Disable Line Quality Monitor and Auto-Retrain ITU-T or Bell22bis Error Control and Data Compression Commands +ESR Selective Repeat+ETBM Call Termination Buffer Management \B Transmit Break to RemoteResult Codes OK 0 to 5 Error Otherwise Break Control22bis Synchronous Access Mode Commands +ESA Configure Synchronous Access SubmodeReporting Selected Options +ESA?Transmit Flow Control Thresholds +ITF?Syntax $Fn Defined Values 22bis FastConnect Command$F Fast Connect Control 22bis Line Side Device Commands Threshold Adjustments for Telephony ExtensionTRV Tip and Ring Voltage Measurement Response22bis S-Parameters Read/Write S-ParameterAscii Summary of S-Parameter DefaultsRegister Function Range/Units Default S0 Number of Rings to Auto-Answer S1 Ring CounterS2 Escape Character S3 Carriage Return CharacterS8 Pause Time For Dial Delay S10 Lost Carrier To Hang Up DelayS12 Escape Prompt Delay EPD S9 Carrier Detect Response TimeS16 Test Mode Bit Mapped Options Status S19 ReservedS20 Reserved S21 V.24/General Bit Mapped Options StatusS24 Sleep Inactivity Timer S25 Delay To DTR OffS26 RTS to CTS Delay S22 Speaker/Results Bit Mapped Options StatusS30 Disconnect Inactivity Timer S27 Bit Mapped Options StatusS28 Bit Mapped Options Status S29 Flash Dial Modifier TimeS38 Delay Before Forced Hang Up S36 Lapm Failure ControlS37 Desired Line Connection Speed S39 Flow Control Bit Mapped Options StatusS41 General Bit Mapped Options Status S48 V.42 Negotiation ActionS82 Break Handling Options S86 Call Failure Reason CodeS91 Pstn Transmit Attenuation Level S95 Extended Result Codes Control22bis Result Codes Table of Result Code DefinitionsCode Message Meaning Connect75TX/1200RX Is enabled Block Diagram Figure A-1. Serial Test/Demo Board Block DiagramProduct Safety and EMC Approvals Country CertificationsCountry Country Code More plannedRegulatory Design Considerations Hardware ConsiderationsSafety SocketModem Placement Qty Name DescriptionTelecom Requirements for the United States ComplianceMulti-Tech Systems, Inc. Compliance Label Content and Format Label Physical CharacteristicsOther Label Requirements Telecommunications Regulations for CanadaLabeling Continuity and Changes New Zealand Telecom Warning Notice Industry CanadaSouth African Statement EMC, Safety, and R&TTE Directive ComplianceInternational Modem Restrictions Index Index
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