Multi-Tech Systems MT5600BA-V92 Data Compression Commands, Command +DR Data Compression Reporting

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Chapter 2 – AT Commands

Data Compression Commands

Command:

+DR Data Compression Reporting

Values:

 

0, 1

 

 

Default:

 

1

 

 

Description:

 

This extended-format numeric parameter controls whether or not the extended-format

 

 

+DR: intermediate result code is transmitted from the modem to the DTE. S95 bit 5 is

 

 

reset to 0 for +DR=0 and is set to a 1 for +DR=1. The more recent setting of +DR or S95

 

 

bit 5, and the W command setting, determines the actual data compression result code

 

 

reporting (see S95 Parameter and W Command).

 

 

+DR0

Data compression reporting disabled (no +DR result code transmitted).

 

 

+DR1

Data compression reporting enabled (+DR result code transmitted). (Default.)

 

 

+DR:

<type> Intermediate Result Code. The +DR: <type> reported represents the

 

 

 

current (negotiated or renegotiated) modem-modem data compression type. If

 

 

 

enabled, the intermediate result code is transmitted at the point after error control

 

 

 

negotiation (handshaking) at which the modem has determined which data

 

 

 

compression technique will be used (if any) and the direction of operation. The

 

 

 

+DR intermediate result code, if enabled, is issued after the Error Control Report

 

 

 

(+ER) and before the final result code (e.g., CONNECT).

Report Commands:

+DR?

Reports current or selected values.

 

 

+DR=? Reports supported range of parameter values.

Command:

+DS Data Compression

 

Values:

 

<direction> Specifies the desired direction(s) of operation of the data compression

 

 

 

function; from the DTE point of view.

 

 

 

+DS0

Negotiated; no compression (V.42bis P0=0).

 

 

 

+DS3

Both directions, accept any direction (V.42bis P0=11).

 

 

<compr_neg> Specifies whether or not the modem should continue to operate if the

 

 

 

desired result is not obtained.

 

 

 

+DS0

Do not disconnect if V.42bis is not negotiated by the remote

 

 

 

 

modem as specified in <direction>.

 

 

<max_dict> Specifies maximum number of dictionary entries (2048 entries) that should

 

 

 

be negotiated (may be used by the DTE to limit the code word size

 

 

 

transmitted, based on its knowledge of the data to be transmitted).

 

 

<max_string> Specifies max string length (32 bytes) to be negotiated (V.42bis P2).

Default:

 

3

 

 

Description:

 

This extended-format compound parameter controls the V.42bis data compression

 

 

function if provided in the modem. It accepts four numeric subparameters:

 

 

+DS=[<direction>[,<compr_neg>[,<max_dict>[,<max_string>]]]]

Report Commands:

+DS?

Reports current or selected values.

 

 

+DS=?

Reports supported range of parameter values.

Command: +DS44 V.44 Compression Select

Description:This extended-format compound parameter controls V.44 data compression function.

Values:<direction> The decimal number that specifies the desired direction(s) of operation of the data compression function; from the DTE point of view.

0Negotiated, no compression.

1Transmit only.

2Receive only.

3Both directions, accept any direction. Default

<compress_negotiation> The decimal number that specifies whether or not the modem

should continue to operate if the desired result is not obtained.

0Do not disconnect if V.44 is not negotiated by the remote DCE as specified in <direction>. Default

1Disconnect if V.44 is not negotiated by remote DCE as specified in

<direction>.

<capability> The decimal number that specifies the use of stream method, packet method, multi-packet method.

0Stream method. Default

1Packet method.

2Multi-packet method.

Multi-Tech Systems, Inc. AT Commands Reference Guide (S000273G)

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Contents MultiModem→ Warranty CopyrightRecord of Revisions TrademarksTable of Contents You must press Enter to send the command to the modem IntroductionAT Commands General CommandsCommand DS=n Dial Stored Telephone Number Command En Echo Command Mode CharactersCommand Hook Control Command Information RequestCommand Result Codes Enable/Disable Command ? Read Register ValueCommand Tone Dialing Command Result Code FormatCommand Long Space Disconnect Command Modem ResetCommand Data Carrier Detect DCD Control Command Dn Data Terminal Ready DTR ControlCommand Modem-Initiated Flow Control Command V.42bis Data CompressionCommand Load Factory Settings Command V.22bis Guard Tone ControlCommand Make/Break Dial Ratio Command Sync/Async ModeCommand Clear to Send CTS Control Command Data Set Ready DSR ControlCommand Store Current Configuration Command &Xn Synchronous Clock SourceCommand Select Profile for Hard Reset Command &Zn=x Store Telephone NumberCommand %En Line Quality Monitor Command Line Signal LevelCommand Line Signal Quality Command PCM Code SelectionCommand \Kn Break Control Command \Nn Error Correction Mode SelectionCommand \Vn Single Line Connect Message Report CommandsCountry/Region of Installation Command +MS= Modulation SelectionValues & Default SubparametersCommand MNP Extended Services Command Flash Memory DownloadCommand View Numbers in Blacklist Command View Delayed NumbersCommand *E Escape Remote Configuration Escape CommandsCommand +++ Escape Sequence Modem Connection Commands Command +PCW=n Call Waiting EnableCommand +PIG=n PCM Upstream Ignore Command +PQC=n Quick Connect ControlResult Code Force Full Startup Procedure Next ConnectionEnable Quick Connect Profile Save Caller ID Commands Callback Security CommandsData Compression Commands Command +DR Data Compression ReportingCommand +DS Data Compression Command +DS44 V.44 Compression SelectError Control Commands Command +EB Break Handling in Error Control OperationCommand +EFCS Bit Frame Check Sequence Command +ER Error Control Reporting+ESR? Command +ESR Selective RejectCommand +ETBM Call Termination Buffer Management DTE Commands Command +IFC DTE-Modem Local Flow ControlCommand +ILRR DTE-Modem Local Rate Reporting Reported RateModulation Command Command +IPR Fixed DTE RateCommand +MR Modulation Reporting Control +MCR Report SyntaxCall Control Command Command -STE= Set Telephony ExtensionBehavior in Data Mode +FCLASS=0 Behavior in Voice Mode +FCLASS=8Examples No Carrier ATS86? Test CommandCommand &T n Test Command Voice Commands Voice Commands OverviewConfiguration Commands Command +FCLASS=8 Select Voice ModeCommand +VNH= Automatic Hang-up Control Command +FLO Flow ControlVoice Commands Command +VIP Voice Initialize All ParametersCommand +VRX Start Modem Receive Record Command +VTS Send Voice TonesCommand +VTX Start Modem Transmit Playback Command +VGR Voice Gain Receive Record GainCommand +VGT Voice Gain Transmit Playback Volume +VTS Examples+VLS Example Command +VIT Voice Inactivity Timer DTE/ModemCommand +VLS Analog Source/Destination Selection Command +VRA Ringback Goes Away Timer Table of +VLS Command Options Label Primitives Description+VSP=1 IntervalCommand +VSM Compression Method Selection Command +VRN Ringback Never Appeared TimerCommand +VSD Silence Detection Quiet and Silence Command +VTD Beep Tone Duration Timer Command +VDR Distinctive RingCommand +VDT Control Tone Cadence Reporting Before using it DescriptionRate +VPR?Speakerphone Commands Command +VSP Speakerphone ON/OFFCommand +VGM Microphone Gain Command +VGS Speaker GainShielded Hex Event Report Description Code Voice Mode Shielded CodesUnformatted Form Reporting Caller ID Event Number 4 Extended Keypad Dtmf a V.8bis Commands Command +A8E V.8bis Operation ControlsCommand +A8I CI Signal Indication Default Values25bis Commands 25bis Responses List Request of Forbidden NumberList Identification Number List Request of Stored NumberRegisters Reg Unit Range Default DescriptionRegisters Registers +MR, +ER,+DR, and W commands Result Codes FAX Data+DR ALT +DR None+ER None +ER LapmTerse Verbose Description Terse Verbose Description Setting Country/Regional Codes ExampleIndex Qcpc 46, 47, 48, 49 Index
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MT5600BA-V92 specifications

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