
PARADYNE CORPORATION

DATAPORT EXPRESS 3740

Modem Type                   Data (synchronous/asynchronous)/Fax
Maximum Data Rate            28.8Kbps
Maximum Fax Rate             14.4Kbps
Data Bus                     External
Fax Class                    Class I & II
Data Modulation Protocol     Bell 103A/212A

                             ITU-T V.21, V.22, V.22bis, V.23, V.32,
                             V.32bis, V.34

                             Rockwell V.FC
Fax Modulation Protocol      ITU-T V.17, V.27ter, V.29
Error Correction/Compression MNP5, V.42, V.42bis

[Image]

                                CONNECTIONS

         Purpose             Location          Purpose           Location

  Line out                     CN1       DC power                  CN4

  Line in                      CN2       Power switch              SW1

  RS-232/422                   CN3

                             DIAGNOSTIC LED(S)

    LED         Color         Status                 Condition

    TST          Red            On             Modem test executing

    TST          Red           Off               Normal operation

     HS          Red            On         Modem is operating at highest
                                                  configured rate

     HS          Red           Off        Modem is operating at less than
                                                   highest rate

     EC          Red            On          Error correction activated

     EC          Red           Off        Error correction not activated

     CD          Red            On            Carrier signal detected

     CD          Red           Off          Carrier signal not detected

     OH          Red            On               Modem is off-hook

     OH          Red           Off               Modem is on-hook

     RD          Red            On            Modem is receiving data

     RD          Red           Off          Modem is not receiving data

     SD          Red            On          Modem is transmitting data

     SD          Red           Off        Modem is not transmitting data

     TR          Red            On              DTR signal is high

     TR          Red           Off               DTR signal is low

     MR          Red            On                  Power is on

     MR          Red           Off                 Power is off

                         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/MNP mode only enabled.

      \N6        V.42 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

                             MODULATION SELECT

  Type:          Configuration

  Format:        AT [cmds] %Mn [cmds]

  Example:       AT %M0 &W<CR>

  Description:   Selects whether V.34 or V.FC is used at 28.8Kbps

    Command                              Function

      %M0        V.34 and V.FC enabled.

      %M1        V.34 only enabled.

      %M2        V.FC only enabled.

                              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.34 at 4800bps speed.

     %B7200      Select V.34 at 7200bps speed.

     %B9600      Select V.34 at 9600bps uncoded speed.

    %B12000      Select V.34 at 12Kbps speed.

    %B14400      Select V.34 at 14.4Kbps speed.

    %B16800      Select V.34 at 16.8Kbps speed.

    %B19200      Select V.34 at 19.2Kbps speed.

    %B21600      Select V.34 at 21.6Kbps speed.

    %B24000      Select V.34 at 24Kbps speed.

    %B26400      Select V.34 at 26.4Kbps speed.

    %B28800      Select V.34 at 28.8Kbps speed.

    %BL2400      Select V.22bis at 2400Kbps speed.

    %BL4800      Select V.32bis/V.32 at 4800Kbps speed.

    %BL7200      Select V.32bis at 7200Kbps speed.

    %BL9600      Select V.32bis/V.32 at 9600Kbps speed.

    %BL12000     Select V.32bis at 12Kbps speed.

    %BL14400     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.

