AT%C Compression Control, Examples | Telenetics 56 manual

AT%C Compression Control

Data compression is a technique used to reduce the size of data being transmitted without losing any of the original information.

Compressed data must be decoded at the receiving end of the communications path in order to extract the original information.

Full details on the subject of data compression can be found in the Error Correction Section of this guide.

☞When selecting a data compression mode, error correction must also be selected. (See the \N command for details of error correction.)

Options

AT%C0	Compression disabled
AT%C1	MNP 5 compression enabled
AT%C2	V.42bis data compression enabled
AT%C3 ■	V.42bis data compression enabled with fallback to
MNP 5
See Also
\N command	Error correction
*V command	V.42bis compression table size
Examples
AT%C3\N3	Select V.42bis with auto-reliable error correction
AT%C1\N3	Select MNP5 with auto-reliable error correction
Range
0-3

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Telenetics 56 manual AT%C Compression Control, Examples

Contents

Global Carrier 56 Modem User’s Guide Page Contact Information Technical SupportMailing List Contents 106 203 248 AT Commands Error CorrectionDumb Mode RS-232 Signals Unpacking Your Hardware Additional Items You Need Front View Hardware OverviewBack View DTE RS232 Installation Summary Finding a Suitable Location Connecting the Cables Set Connector Power InputTelco/Dial Line Telephone Driver Installation WindowsWindows ME Modem LED Display Front Panel Mode LEDs Line Modulation OneThree Four AT Commands Multiple CommandsEscape Sequence Repeat Command Help Command Response Codes Dialling Dial Modifiers Hanging Up Stored Number DiallingAnswering Calls ATCommands Selecting Speeds Terminal Speeds Setting Terminal Speeds 90 & V.34 Typical SettingsLine Speeds Example 2 Dialling other modems at 19,200 bps V.34 or V.FC 32bis Modem Typical SettingsExample 3 Dialling information services at 1200 bps or Example 2 Dialling other modems at 14,400 bps or V.32bis Example 3 Answering incoming calls XON/XOFF Flow Control Flow ControlRTS/CTS Flow Control Transparent XON/XOFF Flow Control Failsafe Flow Control Inactivity TimerCommand Timer AT\T5 Configuring the Modem Viewing the Current Configuration Error Correction Error Correction Protocols Reliable Mode Auto-Reliable ModeData Compression Improving Performance with MNP Speed Changes Cellular Modem Users ATCommands Entering a Security Password Security Menu Adding and Changing Users Access Record Removing UsersListing Existing Users Enabling Modem Security Quitting the Menu Callback Security Downloading the Security File Integrating Caller ID into the Security Database Encryption SuperSecure Advanced Security Mode DES Multikey Entering a Key for Each User Accessing a System Using SuperSecure Ringing Password Expiry Option Enabling Rotating Secondary Keys Entering a Password in the Remote Modem’s Database Entering a New Password in the Local Modem’s DatabaseMinimum Password Length Outdial Disable Option Security Database Lock Option Dial Stored Phone Numbers Only Option General Notes on Data Security Synchronous Modes Synchronous Operation Synchronous Mode Selecting Synchronous ModeDialling Hanging Up Answering Calls Dialling Smart Leased- Line Mode Calling and AnsweringUsing &L1Leased Line Operations Auto Leased Line Operation &L2 or &L3 Wire Leased Line setup via audio port Setting Up your Modem Selecting Communications Speeds Dialling in Dumb Mode Hints for Unix Computers and Multiplexers Using the Talk /Data Button to Dial Using DTR to Dial Answering Calls in Dumb Mode Manual Answering Description Option SwitchesSwitch AT%F 25bis Operations Selecting V.25bis Operation Overridden Settings 25bis CommandsData Formats 25bis Indications Verbal Meaning Hanging Up Direct Dialling Selecting Speeds Synchronous Character Encoding DB25 Pin SignalModem Cable Asynchronous Notes Hdlc Notes Distinctive Ring Commands AT-SDR=0AT-SDR=7 Caller ID Enabling the Caller ID Function Integrating Caller ID into the Security Database AT#CID?AT#CID=? Distinctive Ringing ‘Tune’ Option Call Logging Call Log Format +++ Escape Sequence OptionsSee Also Remote Access Sequence ATA, ATD, ATH, ATZ, AT&T Request remote access AT? Interactive Command Help AT?AT?&T Repeat Last Command ATA Answer Command Speed ATBn Select Communications Standard B10 32 at 4800bps B11 32 at 7200bps B12 See Also ATD Dial Example Dial Modifiers Pause Return to local command state Reverse mode@ wait for quiet answer MNP 10 Cellular Option Or disable calling tonesInitiate MNP 10 at 1200 bps Last number redial Hook flash =n dial stored phone number nWait for dial tone See Also ATE Echo RangeATE0 ATH1 ATH Hang UpATH0 ATH2 ATI Identity ATL0 ATL Speaker Volume ControlRange See Also ATL1 ATM2 ATM MonitorATM0 ATM3 ATO Return to On-line State ATO29 ATO27ATO28 ATO30 ATQ Quiet Suppress Response Codes ATQ1ATQ2 ATR Set Terminal Speed ATR38 ATR26ATR28 ATR57 ATSn? Display S Register Value ATSn= Set S Register Value ATV Verbal Response Codes Verbal Numeric Meaning ATW Connection Speed Information ATW0ATW1 ATX Extended Response Codes Command ATZ1 ATZn Restore Configuration ProfileATZ0 ATZ2 AT&B Character Length Range Options AT&C2 AT&C Controlling Data Carrier DetectAT&C0 AT&C3 AT&D1 AT&D Controlling Data Terminal ReadyAT&D0 AT&D3 AT&F. Reinitialise Modem AT&F1 AT&F Restore Factory DefaultsAT&F0 AT&F2 AT&G Guard Tone AT&G1AT&G2 AT&H Clock Control AT&H1 AT&K4 AT&K Flow ControlAT&K0 AT&K5 Modem to the computer AT&L Leased Line AT&M2 AT&M Synchronous/Asynchronous ModeAT&M1 AT&M4 Range See Also AT&N Abort Connection AT&N0 AT&R RTS/CTS Control AT&R1 AT&S Controlling DSR AT&S1AT&S2 AT&Vn View Active Configuration Profile AT&W1 AT&Wn Write Configuration ParametersAT&W0 AT&W2 AT&X Transmit Clock AT&X1AT&X2 AT&Y1 AT&Yn Select Stored Profile on Power UpAT&Y0 AT&Y2 AT&Z Stored Phone Number AT#A Universal Remote Access AT#A0AT#A1 Range AT#B 1200bps Originate Mode AT#B1 AT#C V.25 Calling Tones AT#C0 AT#CID Caller ID AT#CID2 AT#CID0AT#CID1 AT#CID3 AT#D V.25bis Direct Calling AT#D1 AT#E2 AT#E EncryptionAT#E1 AT#E3 AT#H Display Help AT#I V.22bis Leased Line AT#I1 AT#J V.42 Capability Checking AT#J0 AT#K MNP 10 mode AT#K0AT#K2 AT#M2 AT#M Command Mode SelectionAT#M1 AT#M3 AT#N V.25bis Character Encoding AT#N1 AT#O2 AT#O Buffer OverflowAT#O1 AT#O3 AT#Q V.25bis Terminal Speed AT#R Enable Remote Control AT#S Security Menu AT#U V.25bis Character Set AT#U1 AT#V Verifier AT#V0 AT%B AutoAnswer Setting AT%B2 AT%C Compression Control Examples AT%D Set Disconnect Delay AT%E Auto EQM Retrain AT%E0AT%E1 AT%F DTR/DSR override AT%F0 AT%H2 AT%H MNP 10 Negotiation SpeedAT%H1 AT%H3 AT%K CTS During Dial and Handshake AT%K1 AT%L Display Line Signal Level AT%Ln Transmit Level Data Mode 11-19 AT%M Mode LED Indication AT%M1 AT%N Non-Standard Terminal Speeds AT%N1AT%N2 AT%P Connect Message Timing AT%P1 AT%Q Line Signal Quality AT%Q AT%R CTS Override AT%R1AT%R2 AT%S DSR Override AT%S1 AT%T DCD Override AT%T1 AT%U V.42 Response Codes AT%U1AT%U2 AT%W Welcome Message AT%W1 AT\A1 AT\A MNP Block SizeAT\A0 AT\A2 Default See Also AT\Bn Generate BreakAT\B4 AT\J Auto-Reliable Fallback AT\J1 AT\K Break Control Default AT\N Asynchronous Operating Mode See Also AT\Q Extended Flow Control AT\S Display Active Configuration AT\S AT\Tn Inactivity Timer Data Mode AT\V8 AT\V Error Correction Response CodesAT\V1 AT\V9 AT\X XON/XOFF Pass Through AT\X1 Default Range See Also AT*K Select Primary DES KEY from Stored Keys AT*R V.13 Remote RTS Signalling AT*R1 AT*S Change Current User Password AT*T Auto Call Redial AT*T1 AT*V Maximum V.42bis Dictionary Size AT*V1 AT*W Welcome Message Text AT*Y Escape Seq. Detection in Sync AT*Y1 AT+ICF Character Framing and Parity Select AT+MS Select Modulation Mod Automode Minrate MaxrateXlaw Rbsignaling Connecting with 56k technologyNn Automode AT+MS=? Reporting Supports Options +MS AT-Q MNP10 Fallback to V.22bis AT-Q0 AT-DATE Time & Date AT-LOG Call Log AT-LOGAT-LOG2 ATE V.32 compromise Equaliser 25BIS CIC Connect Incoming Call 25BIS CRN Dial Modifier Meaning CRS command Dial Stored Number Register 25BIS CRS Dial Stored Number 25BIS DIC Disregard Incoming Call 25BIS PRN Stored Phone Number CRS 25BIS RST Reset Register Settings and Modem Memory IntroductionReading and Changing S Registers Page Default Range ATS0 Rings Before Answer ATS1 Ring Count ATS2 Escape Sequence Character Default Example ATS3 Carriage Return Character ATS4 Line Feed Character ATS5 Backspace Character ATS6 Dial Tone Wait Time ATS7 Wait for Carrier ATS8 Pause Dial Modifier Delay ATS9 Carrier Detect Response Time ATS10 Lost Carrier/Hang Up Delay ATS11 Dtmf Tone Timing ATS12 Escape Sequence Guard Time ATS16 Test in Progress read only ATS16 ATS18 Test Timer ATS25 DTR Loss Detection ATS26 RTS/CTS Delay ATS27 Delay Before Dial ATS29 Hook Flash Duration ATS30 Inactivity Timer Data ModeVoice Mode ATS105Voice ‘Dead-man’ Timer ATS33 EQM Threshold Value ATS38 Disconnect Delay ATS42 Modem Disconnect Reason Value Meaning ATS43 Break Sequence Length ATS45 V.22bis EQM Threshold Value ATS57 DTR High Detection ATS62 V.42 Detection Timer ATS66 Remote Access Guard Time ATS67 Remote Access Character ATS69 Command Line Time-out ATS71 Ignore Incoming Call ATS74 Disconnect Reason for Prev. Call ATS80 Flow Control High Water Mark ATS81 Flow Control Low Water Mark ATS82 Failsafe Flow Control Overrun ATS95 Extended Response Codes ATS96 Help Page Width ATS97 Help Page Length ATS105 Voice ‘Dead Man’ Timer ATS30 ATS122 AutoRateChange EQM ATS123 AutoRateChange ATS124 Duration EQM Modem Response Codes Modem Response Codes 25bis Indications Receive Data RxD Pin Signal Ground SG PinTransmit Data TxD Pin Request To Send RTS Pin Transmit Clock TxC Pin Ring Indicator RI PinData Carrier Detect DCD Pin Receive Clock RxC Pin Standard RS-232 Examples Abbreviated Command List General CommandsPage Answer mode Page #CID0 S0=0 No AutoAnswer Mod Possible Rates bps Distinctive Ring Commands Dial Modifiers AbbreviatedCommandList Page Ansi Ascii BBS BPS Clear to Send CTS ContentionCharacter Set Clock CPU CRTCTS DCD DCE DTE EIA EbcdicEeprom Mail ENQ ETX Hdlc Horizontal Redundancy Checking HRC HeaderHertz Hz Host Computer ISO ITULED Longitudinal Redundancy Check Log onLog Off Loopback NAK Pabx PBX PEP Prom RAM Sdlc ROMRTS SIG SOH STX SYN XON/XOFF ZModem Command Sets Caller ID Environmental Error CorrectionEncryption Humidity Product Warranty RMA Procedure Return Merchandise Authorization RMA Procedure Compliances Department of Canada Statement Compliances