Multi-Tech Systems MT2456SMI22 manual Short Form Long Form Value in ATXn Command, Rlsd Option

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Chapter 4 - V.22bis Commands

Short Form

Long Form

 

n Value in ATXn Command

 

0

1

2

3

4

 

 

42

CARRIER 75/1200

X

X

X

X

X

46

CARRIER 1200

X

X

X

X

X

47

CARRIER 2400

X

X

X

X

X

67

PROTOCOL: V42

X

X

X

X

X

70

PROTOCOL: NONE

X

X

X

X

X

83

LINE IN USE

X

X

X

X

X

85

OFF-HOOK INTRUSION

X

X

X

X

X

86

LINE REVERSAL DETECTED

X

X

X

X

X

87

NO LINE

X

X

X

X

X

Note:

An 'x' in a column indicates that the message (either the long form if verbose, or the value only for short form) will be generated when that particular value of 'n' (shown at the top of the column) has been selected by the use of ATXn. If the column is blank, then no message will be generated for that x option. A numeral indicates which less explicit message (verbose or short form) will be output for that X option.

&C RLSD Option

The modem controls the RLSD output in accordance with the parameter supplied. The parameter value, if valid, is written to S21 bit 5.

Syntax &C<value>

Defined Values

<value> Decimal number corresponding to the selected option.

0RLSD remains ON at all times.

1RLSD follows the state of the carrier. (Default)

Result Codes OK 0 or 1

 

ERROR Otherwise

&D

DTR Option

This command interprets the ON to OFF transition of the DTR signal from the DTE in accordance with the parameter supplied. The parameter value, if valid, is written to S21 bits 3 and 4. Also, see S25.

Syntax &D<value>

Defined Values

<value> Decimal number corresponding to the selected option.

0DTR drop is interpreted according to the current &Qn setting as follows:

&Q0, &Q5, &Q6: DTR is ignored (assumed ON). Allows operation with DTEs, which do not provide DTR.

&Q1: DTR drop causes the modem to hang up. Auto-answer is not affected.

&Q2, &Q3: DTR drop causes the modem to hang up. Auto-answer is inhibited.

1DTR drop is interpreted according to the current &Qn setting as follows:

&Q0, &Q1, &Q5, &Q6: DTR drop is interpreted by the modem as if the asynchronous escape sequence had been entered. The modem returns to asynchronous command state without disconnecting.

&Q2, &Q3: DTR drop causes the modem to hang up. Auto-answer is inhibited.

2DTR drop is interpreted according to the current &Qn setting as follows:

&Q0 through &Q6: DTR drop causes the modem to hang up. Auto-answer is inhibited. (Default)

3DTR drop is interpreted according to the current &Qn setting as follows:

&Q0, &Q1, &Q5, &Q6: DTR drop causes the modem to perform a soft reset as if the Z command were received.

&Q2, &Q3: DTR drop causes the modem to hang up. Auto-answer is inhibited.

&K Flow Control

This command defines the DTE/DCE (terminal/modem) flow control mechanism. The parameter value, if valid, is written to S39 bits 0, 1, and 2.

Syntax &K<value>

Defined Values

<value> Decimal number corresponding to the selected option. 0 Disables flow control.

3Enables RTS/CTS flow control. (Default for data modem modes.)

4Enables XON/XOFF flow control.

5Enables transparent XON/XOFF flow control.

Result Codes OK <value> = 0, 3, 4, or 5

ERROR Otherwise

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

17

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Contents SocketModem Country By Email By Phone PN S000281A, Version aContents Product Description Product Description SpecificationsSpeed Conversion Technical SpecificationsMaximum Component Height Physical DimensionsPin Descriptions Pin Configurations3V DC Power 3V and 5V Serial SocketModem Handling PrecautionsInput High Input Low Outputs Output High Output LowDTE/DCE Commands Generic Modem Control CommandsCall Control Commands Modulation Control CommandsSynchronous Access Mode Commands Error Control and Data Compression CommandsFast Connect Command Line Side Device CommandsSoft Reset and Restore Profile 22bis Generic Modem Control CommandsOperating Mode +VCID Caller ID CIDIdentification +GCI Country of InstallationProcedure Restore Factory Configuration ProfileLocal Analog Loopback Test Load to Internal RAMCommand Echo 22bis DTE/DCE-Modem Interface commandsQuiet Result Codes Control Result Code FormExtended Result Codes Connect Ring No Carrier Error No Dial Tone Busy No AnswerRlsd Option Short Form Long Form Value in ATXn CommandResult 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 Result Code Set Pulse Dial Default Set Tone Dial DefaultReturn to On-Line Data Mode Speaker VolumeMSpeaker Control Display Current Configuration and Stored ProfilesSelect Guard Tone Select Pulse Dial Make/Break RatioReport Line Signal Level \V Single Line Connect Message EnableReport Line Signal Quality Display Blacklisted NumbersNO. Phone Number -DELAY Display Delayed NumbersBehavior in Data Mode Syntax *D Example+VDR Distinctive Ring +PCW Call Waiting EnableReporting Selected Values Table of +MS Command Supported Rates 22bis Modulation Control Commands+MS Modulation Selection SyntaxITU-T or Bell Enable/Disable Line Quality Monitor and Auto-Retrain+ESR Selective Repeat 22bis Error Control and Data Compression Commands+ETBM Call Termination Buffer Management \B Transmit Break to RemoteBreak Control Result Codes OK 0 to 5 Error Otherwise+ESA Configure Synchronous Access Submode 22bis Synchronous Access Mode CommandsReporting Selected Options +ESA?+ITF? Transmit Flow Control ThresholdsSyntax $Fn Defined Values 22bis FastConnect Command$F Fast Connect Control Threshold Adjustments for Telephony Extension 22bis Line Side Device CommandsTRV Tip and Ring Voltage Measurement ResponseRead/Write S-Parameter 22bis S-ParametersAscii Summary of S-Parameter DefaultsRegister Function Range/Units Default S1 Ring Counter S0 Number of Rings to Auto-AnswerS2 Escape Character S3 Carriage Return CharacterS10 Lost Carrier To Hang Up Delay S8 Pause Time For Dial DelayS12 Escape Prompt Delay EPD S9 Carrier Detect Response TimeS19 Reserved S16 Test Mode Bit Mapped Options StatusS20 Reserved S21 V.24/General Bit Mapped Options StatusS25 Delay To DTR Off S24 Sleep Inactivity TimerS26 RTS to CTS Delay S22 Speaker/Results Bit Mapped Options StatusS27 Bit Mapped Options Status S30 Disconnect Inactivity TimerS28 Bit Mapped Options Status S29 Flash Dial Modifier TimeS36 Lapm Failure Control S38 Delay Before Forced Hang UpS37 Desired Line Connection Speed S39 Flow Control Bit Mapped Options StatusS48 V.42 Negotiation Action S41 General Bit Mapped Options StatusS82 Break Handling Options S86 Call Failure Reason CodeS95 Extended Result Codes Control S91 Pstn Transmit Attenuation LevelTable of Result Code Definitions 22bis Result CodesCode Message Meaning Connect75TX/1200RX Is enabled Figure A-1. Serial Test/Demo Board Block Diagram Block DiagramCountry Certifications Product Safety and EMC ApprovalsCountry Country Code More plannedHardware Considerations Regulatory Design ConsiderationsSafety Qty Name Description SocketModem PlacementTelecom Requirements for the United States ComplianceMulti-Tech Systems, Inc. Compliance Label Physical Characteristics Label Content and FormatOther Label Requirements Telecommunications Regulations for CanadaLabeling Continuity and Changes Industry Canada New Zealand Telecom Warning NoticeSouth African Statement EMC, Safety, and R&TTE Directive ComplianceInternational Modem Restrictions Index Index