Selecting Speeds, Terminal Speeds | Telenetics 56 specification

Selecting Speeds

The following section describes how to select line and terminal speeds for your modem.

Terminal Speeds

Your modem has the ability to communicate with your computer at various speeds. The modem offers two speed modes: variable speed mode and constant speed mode.

Constant speed mode forces your modem to maintain the terminal speed that was selected when you dialed another modem, even if the connection speed made with the other modem does not match the terminal speed of your modem and computer.

For example, if your modem connected to another modem at 2400 bps and its terminal speed is 9600 bps, the modem will maintain its terminal speed at 9600 bps. Because of this, you must select flow control between the modem and your computer. To select constant speed mode:

•Type: AT\N0 <E>

For more details on constant speed mode and flow controls, see the Command Descriptions chapter for a discussion of the \N, B and &K commands. + Some computers cannot cope with receiving data at speeds above 19,200 bps. If you wish to run at high speeds, you should install a COM port that has a 16550 chip in place of your regular COM port. The 16550 chip allows your computer to accept data at very high speeds when used with suitable drivers and software.

Variable speed mode allows your modem to automatically adjust its terminal speed to match the line speed. For example, if your modem connects to another modem at 4800 bps and its terminal speed is 9600 bps, the modem will automatically change its terminal speed to 4800 bps (and, thus, you or your software would have to change the speed of your computer to 4800 bps).

If you have variable speed mode and B0, B1, B2 or B9 selected, the modem will attempt to connect at a speed to match the terminal speed.

At 300 bps, select B0 or B2 for V.21, or B1 for Bell 103. At 1200 bps, select B0 for V.23, B1 for Bell 212A, or B2 for V.22.

Variable speed mode may be selected by:

•Type: AT\N1 <E>

For more details about the variable speed mode, see the \N and B commands in the Command Descriptions chapter of this guide.

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Telenetics 56 manual Selecting Speeds, Terminal Speeds

Contents

Global Carrier 56 Modem User’s Guide Page Technical Support Contact InformationMailing 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 Set Connector Power Input Connecting the CablesTelco/Dial Line Telephone Windows Driver InstallationWindows ME Modem LED Display Line Modulation One Front Panel Mode LEDsThree Four Multiple Commands AT CommandsEscape Sequence Repeat Command Help Command Response Codes Dialling Dial Modifiers Stored Number Dialling Hanging UpAnswering Calls ATCommands Selecting Speeds Terminal Speeds 90 & V.34 Typical Settings Setting Terminal SpeedsLine 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 Auto-Reliable Mode Reliable ModeData Compression Improving Performance with MNP Speed Changes Cellular Modem Users ATCommands Entering a Security Password Security Menu Adding and Changing Users Removing Users Access RecordListing 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 New Password in the Local Modem’s Database Entering a Password in the Remote 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 Selecting Synchronous Mode Synchronous ModeDialling Hanging Up Answering Calls Dialling Calling and AnsweringUsing &L1 Smart Leased- Line ModeLeased 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 25bis Commands Overridden SettingsData Formats 25bis Indications Verbal Meaning Hanging Up Direct Dialling Selecting Speeds Synchronous Character Encoding DB25 Pin SignalModem Cable Asynchronous Notes Hdlc Notes AT-SDR=0 Distinctive Ring CommandsAT-SDR=7 Caller ID Enabling the Caller ID Function AT#CID? Integrating Caller ID into the Security DatabaseAT#CID=? Distinctive Ringing ‘Tune’ Option Call Logging Call Log Format Options +++ Escape SequenceSee Also Remote Access Sequence ATA, ATD, ATH, ATZ, AT&T Request remote access AT? AT? Interactive Command HelpAT?&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 Reverse mode Return to local command state@ wait for quiet answer MNP 10 Cellular Option Or disable calling tonesInitiate MNP 10 at 1200 bps Last number redial =n dial stored phone number n Hook flashWait for dial tone See Also Range ATE EchoATE0 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 ATQ1 ATQ Quiet Suppress Response CodesATQ2 ATR Set Terminal Speed ATR38 ATR26ATR28 ATR57 ATSn? Display S Register Value ATSn= Set S Register Value ATV Verbal Response Codes Verbal Numeric Meaning ATW0 ATW Connection Speed InformationATW1 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&G1 AT&G Guard ToneAT&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&S1 AT&S Controlling DSRAT&S2 AT&Vn View Active Configuration Profile AT&W1 AT&Wn Write Configuration ParametersAT&W0 AT&W2 AT&X1 AT&X Transmit ClockAT&X2 AT&Y1 AT&Yn Select Stored Profile on Power UpAT&Y0 AT&Y2 AT&Z Stored Phone Number AT#A0 AT#A Universal Remote AccessAT#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#K0 AT#K MNP 10 modeAT#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%E0 AT%E Auto EQM RetrainAT%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%N1 AT%N Non-Standard Terminal SpeedsAT%N2 AT%P Connect Message Timing AT%P1 AT%Q Line Signal Quality AT%Q AT%R1 AT%R CTS OverrideAT%R2 AT%S DSR Override AT%S1 AT%T DCD Override AT%T1 AT%U1 AT%U V.42 Response CodesAT%U2 AT%W Welcome Message AT%W1 AT\A1 AT\A MNP Block SizeAT\A0 AT\A2 AT\Bn Generate Break Default See AlsoAT\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 Maxrate MinrateXlaw Connecting with 56k technology RbsignalingNn Automode AT+MS=? Reporting Supports Options +MS AT-Q MNP10 Fallback to V.22bis AT-Q0 AT-DATE Time & Date AT-LOG AT-LOG Call 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 Introduction Register Settings and Modem MemoryReading 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 Data Mode ATS30 Inactivity TimerVoice 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 CRT CPUCTS DCD DCE DTE EIA EbcdicEeprom Mail ENQ ETX Hdlc Horizontal Redundancy Checking HRC HeaderHertz Hz Host Computer ITU ISOLED 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