
AT&T PARADYNE

DATAPORT EXPRESS 3711

Modem Type                   Data (synchronous/asynchronous)/Fax
Maximum Data Rate            14.4Kbps
Maximum Fax Rate             14.4Kbps
Data Bus                     8-bit ISA
Fax Class                    Class I & II
Data Modulation Protocol     Bell 103A/212A

                             ITU-T V.21, V.22, V.22bis, V.32, V.32bis
Fax Modulation Protocol      ITU-T V.17, V.21CH2, V.27ter, V.29
Error Correction/Compression MNP5, V.42, V.42bis

[Image]

                                CONNECTIONS

         Purpose           Location            Purpose           Location

  Line out                    CN1       Line in                    CN2

          BASE I/O ADDRESS SELECTION

      Port           SW1/1          SW1/2

  COM1: (3F8h)        On              On

  COM2: (2F8h)        Off             On

  COM3: (3E8h)        On             Off

  COM4: (2E8h)        Off             On

            INTERRUPT SELECTION

   IRQ    SW1/3    SW1/4    SW1/5    SW1/6

    2       On      Off      Off      Off

    3      Off       On      Off      Off

    4      Off      Off      On       Off

    5      Off      Off      Off      On

                         Proprietary AT Command Set

                                 AUTO BAUD

  Type:          Register

  Format:        AT [cmds] S78=n [cmds]

  Example:       AT S78=0 &W<CR>

  Description:   Allows modem to connect at remote modems modulation.

    Command                              Function

   S78=0        Auto baud enabled.

     S78=1       Auto baud disabled.

                  AUTO-RELIABLE TIME BUFFER CONFIGURATION

  Type:           Configuration

  Format:         AT [cmds] \Cn [cmds]

  Example:        AT \C1 &W<CR>

  Description:    Controls the handling of incoming data during
                  auto-reliable time period.

    Command                              Function

   \CO           Data is discarded.

      \C1         Data is buffered.

      \C2         Data is discarded, resets to \C1 on receipt of
                  autoreliable fallback character.

                     AUTO-RELIABLE FALLBACK CHARACTER

  Type:              Register

  Format:            AT [cmds] %An [cmds]

  Example:           AT%A20<CR>

  Default:           19

  Range:             0-127

  Unit:              ASCII

  Description:       Sets the character used as the auto-reliable
                     fallback character. %A0 will disable this function.

                             BAUD RATE ADJUST

  Type:          Configuration

  Format:        AT [cmds] \Jn [cmds]

  Example:       AT &B0 \J0<CR>

  Description:   Allows baud rate to follow serial port speed

    Command                              Function

   \J0          Baud rate adjust disabled.

      \J1        Baud rate adjust enabled.

                                BREAK SEND

  Type:          Configuration

  Format:        AT [cmds] \Bn [cmds]

  Example:       AT \B3 &W<CR>

  Range:         1-25

  Default        3

  Unit:          .1 second

  Description:   Sends break to modem.

                                BREAK TYPE

  Type:          Configuration

  Format:        AT [cmds] \Kn [cmds]

  Example:       AT \K5 &W<CR>

  Description:   Selects response to DTE break command.

    Command                              Function

      \K0        Send break, clear buffer, enter command mode.

      \K1        Send break, clear buffer

      \K2        Send break, send data, enter command mode.

      \K3        Send break. send data,

      \K4        Send data, send break, enter command mode.

   \K5          Send data, send break.

                                COMPRESSION

  Type:          Configuration

  Format:        AT %Cn

  Example:       AT &B0 %C1 &I2<CR>

  Description:   Selects data compression.

    Command                              Function

      %C0        Data compression disabled.

   %C1          Data compression enabled.

                               CONNECT MODE

  Type:          Configuration

  Format:        AT [cmds] \Nn [cmds]

  Example:       AT \N1 DT555-1212<CR>

  Description:   Sets connect mode.

    Command                              Function

      \N0        Normal mode enabled.

      \N1        Direct mode enabled.

      \N2        MNP mode only enabled.

      \N3        MNP mode with fallback to normal mode enabled.

      \N4        V.42 mode only enabled.

      \N5        V.42 mode with fallback to normal mode enabled.

      \N6        V.42 mode only enabled.

   \N6          V.42 and MNP mode with fallback to normal mode enabled.

      \N7        MNP mode with fallback to normal mode enabled.

                                CTS SIGNAL

  Type:          Configuration

  Format:        AT [cmds] \Dn [cmds]

  Example:       AT \D0<CR>

  Description:   Selects the function of the CTS signal.

    Command                              Function

      \D0        CTS forced high.

   \D1          CTS follows DTR.

                                 ECHO DATA

  Type:          Configuration

  Format:        AT [cmds] \En [cmds]

  \Example:      AT \E0 <CR>

  Description:   Enables modem to echo received data.

    Command                              Function

      \E0        Data echo disabled.

   \E1          Data echo enabled.

                               FLOW CONTROL

  Type:          Configuration

  Format:        AT [cmds] \Gn [cmds]

  Example:       AT \G1 &K3<CR>

  Description:   Selects modem port flow control.

    Command                              Function

   \G0          Flow control disabled.

      \G1        Flow control enabled.

                             FLOW CONTROL TYPE

  Type:          Configuration

  Format:        AT [cmds] \Qn [cmds]

  Example:       AT \Q5<CR>

  Description:   Sets type of flow control used by modem.

    Command                              Function

      \Q0        Flow control disabled.

      \Q1        Bidirectional XON/XOFF flow control enabled.

      \Q2        CTS flow control by DCE enabled.

   \Q3          Bidirectional CTS/RTS flow control enabled.

      \Q4        XON/XOFF flow control by DCE enabled.

                               HELP SCREENS

  Type:          Immediate

  Format:        AT %H

  Example:       AT %H<CR>

  Description:   Displays list of AT commands and their descriptions

                             INACTIVITY TIMER

  Type:             Configuration

  Format:           AT [cmds] \Tn [cmds]

  Example:          AT\T20<CR>

  Default:          0

  Range:            0-255

  Unit:             1 minute

  Description:      Sets the length of time that the modem does not
                    receive information before it disconnects.

                             LAP-M FRAME SIZE

  Type:          Configuration

  Format:        AT [cmds] \An [cmds]

  Example:       AT \A3 %C1<CR>

  Description:   Sets the maximum number of characters per frame of data.

    Command                              Function

      \A0        Maximum frame size is 64

      \A1        Maximum frame size is 128

      \A2        Maximum frame size is 192

   \A3          Maximum frame size is 256

                              MODE SELECTION

  Type:          Immediate

  Format:        AT [cmds] +FCLASS=n

  Example:       AT +FCLASS=8<CR>

  Description:   Sets what mode the modem will operate in.

    Command                              Function

   +FCLASS=0     Data mode.

   +FCLASS=1     Class 1 fax mode.

   +FCLASS=2     Class 2 fax mode.

    +FCLASS?     Displays current setting

                              PROTOCOL/SPEED

  Type:          Immediate

  Format:        AT [cmds] %Bn [cmds]

  Example:       AT %B14400<CR>

  Description:   Selects the current DCE speed.

    Command                              Function

     %B300       Select V.21 or Bell103 at 300bps speed.

     %B1200      Select V.22,V.23 or Bell 212A at 1200bps speed.

     %B2400      Select V.22 at 2400bps speed.

     %B4800      Select v.32/V.32bis at 4800bps speed.

     %B7200      Select V.32bis at 7200bps speed.

     %B9600      Select V.32bis/V.32 at 9600bps uncoded speed.

    %B12000      Select V.32bis at 12Kbps speed.

   %B14400      Select V.32bis at 14.4Kbps speed.

                           V.32bis AUTO-RETRAIN

  Type:           Register

  Format:         AT [cmds] S76=n [cmds]

  Example:        AT S76=0 &W<CR>

  Description:    Selects action the modem will take during bad line
                  quality on 32bis connection.

    Command                              Function

   S76=0         Auto retrain enabled.

     S76=1        Auto retrain disabled.

                           XON/XOFF PASS-THROUGH

  Type:          Configuration

  Format:        AT [cmds] \Xn [cmds]

  Example:       AT \X7 O<CR>

  Description:   Selects whether XON/XOFF signals are sent to remote
                 modem.

    Command                              Function

   \X0          XON/XOFF signals trapped by local modem.

      \X1        XON/XOFF passed through local modem.

