Multi-Tech Systems MT2456SMI22 V Single Line Connect Message Enable, Report Line Signal Level

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DTE speed, e.g., 2400. “V21” for V.21 modulation. “B103” for Bell 103 modulation. “B212” for Bell 212A modulation. “V22” for V.22 modulation. “V22B” for V.22bis modulation. “V23C” for V.23 modulation.
Note: Modulation is omitted for all other modulations. “NONE” for no protocol.
“ALT” for Microcom Network Protocol. “LAPM” for LAP-M protocol.
Asymmetric rates are displayed as “/rate:TX/rate:RX”, e.g., /1200 TX/75 RX. Symmetric rates are displayed as a single DCE rate, e.g., 2400.

Chapter 4 - V.22bis Commands

\V Single Line Connect Message Enable

This command enables or disables the single line connect message format as follows:

Syntax \V<value>

Defined Values

<value> Decimal number corresponding to the selected option.

0Connect messages are controlled by the command settings X, W, and S95.

1Connect messages are displayed in the single line format described below subject to the command settings V (Verbose) and Q (Quiet). In Non-Verbose mode (V0), single line connect messages are disabled and a single numeric result code is generated for CONNECT DTE.

When single line connect messages are enabled, there are no CARRIER or PROTOCOL (+ER:) messages apart from the fields described below.

The single line connect message format is:

CONNECT <DTE Speed>/<Modulation>/<Protocol>/<Compression>/<Line Speed> Where:

DTE Speed =

Modulation =

Protocol =

Line Speed =

%L Report Line Signal Level

Returns a value which indicates the received signal level. The value returned is a direct indication (DAA dependent) of the receive level at the MDP, not at the telephone line connector. For example, 009 = -9 dBm, 043 = -43 dBm, and

so on.

 

 

Result Code

OK

%Q

Report Line Signal Quality

Reports the line signal quality (DAA dependent). Returns the higher order byte of the EQM value. Based on the EQM value, retrain may be initiated if enabled by %E1.

Example: AT%Q

 

015

Result Codes OK if connected

 

ERROR if not connected, or connected in 300 bps or V.23 modes

*B

Display Blacklisted Numbers

This command requests the modem to return a list of blacklisted numbers to the DTE. The format of the response is shown by the example below. Permanently forbidden numbers as defined by country requirements will not appear on this list. If no numbers are blacklisted, only the OK result code is issued.

Syntax *B

Example

NO. - PHONE NUMBER -

------ ------------------------------

1; 4175537660 2; 8288924961 3; 3887278862 4; 3124839442 5; 6284664

OK

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 CodesShort Form Long Form Value in ATXn Command Rlsd OptionResult Codes OK 0 or DTR OptionRTS/CTS Option \G Modem-to-Modem Flow Control XON/XOFF+IFC DTE-Modem Local Flow Control +IBC In Band Commands Entering and Exiting In Band Active StateEM Shielding Data Command Hex Codes Description Supported DTE-to-DCE Commands Supported DCE-to-DTE CommandsBand Processing of AT Commands 22bis Call Control Commands DialDial Modifiers 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+PCW Call Waiting Enable Reporting Selected Values+VDR Distinctive Ring 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?22bis FastConnect Command $F Fast Connect ControlSyntax $Fn Defined Values 22bis Line Side Device Commands Threshold Adjustments for Telephony ExtensionTRV Tip and Ring Voltage Measurement Response22bis S-Parameters Read/Write S-ParameterSummary of S-Parameter Defaults Register Function Range/Units DefaultAscii 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 DescriptionCompliance Multi-Tech Systems, Inc. ComplianceTelecom Requirements for the United States Label Content and Format Label Physical CharacteristicsTelecommunications Regulations for Canada Labeling Continuity and ChangesOther Label Requirements New Zealand Telecom Warning Notice Industry CanadaEMC, Safety, and R&TTE Directive Compliance International Modem RestrictionsSouth African Statement Index Index