Local Analog Loopback Test | Multi-Tech Systems MT2456SMI22 guide

Chapter 4 - V.22bis Commands

&F Restore Factory Configuration (Profile)

The modem loads the factory default configuration (profile). The factory defaults are identified for each command and in the S-Parameter descriptions. A configuration (profile) consists of a subset of S-Parameters.

Syntax &F[<value>]

Defined Values

<value> Decimal number corresponding to the selected configuration.

0Restore factory configuration 0.

1Same as 0; allowed for compatibility. Result Codes OK

ERROR If the modem is connected

&T Local Analog Loopback Test

The modem will perform the local analog loopback test if &T1 is selected. The test can be run only when in an asynchronous operation in non-error-correction mode (normal), e.g., AT&Q6. To terminate the test in progress, the escape sequence must be entered first.

Syntax &T[<value>]

Defined Values

<value> Decimal number corresponding to the selected option.

0Terminates test in progress. Clears S16.

1Initiates local analog loopback, V.54 Loop 3. Sets S16 bit 0. If a connection exists when this command is issued, the modem hangs up. The CONNECT XXXX message is displayed upon the start of the test.

**Load to Internal RAM

This command allows the internal SRAM to be loaded with patch code for minor firmware upgrade including country profile customization. This process transfers the S37 file from the host computer to the modem. The data transfer is done via an ASCII transfer. A successful upload can be verified by invoking ATI3 and/or ATI4 command depending on which of the two were modified. The patch is erased when the power is turned off.

Procedure

1.Configure the communications application program for a DTE rate of 115200 bps. Check the modem for response by typing AT.

2.Issue AT** command to initiate the download process. The following message appears: Download initiated.

3.Send the patch code (e.g., patv00028.s37). The following message appears on successful upload: Modem Firmware Successfully Loaded

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

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Contents

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