
OSITECH COMMUNICATIONS, INC.

LAPTALK PLUS 14.4K

Modem Type                   Data (synchronous/asynchronous)/Fax
Maximum Data Rate            14.4Kbps
Maximum Fax Rate             14.4Kbps
Data Bus                     Compaq portable bus
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
Fax Modulation Protocol      ITU-T V.17, V.21CH2, V.27ter, V.29
Error Correction/Compression MNP5, MNP10, V.42, V.42bis

[Image]

                                CONNECTIONS

         Purpose            Location          Purpose          Location

  Line in                     CN1        Compaq portable         CN3
                                         bus

  Daughterboard               CN2
  connector for network

                         Proprietary AT Command Set

  BIT-MAPPED REGISTERS

  Register     Default

    S14          138

    S16           0

    S21           4

    S22          118

    S23          55

    S27           9

    S28           0

    S31          194

    S39           3

    S40          107

    S41          03

                                BREAK SEND

  Type:          Configuration

  Format:        AT [cmds] \Bn [cmds]

  Example:       AT \B3 &W<CR>

  Default:       3

  Range:         0-9

  Unit:          .1 second

  Description:   Sends break to modem.

                                BREAK TYPE

  Type:                    Configuration

  Format:                  AT [cmds] \Kn [cmds]

  Example:                 AT \K1 <CR>

  Description:             Configures action of break signal.

    Command      Break from DTE      Break from DTE     Break from remote
                                    while in command          modem
                                          mode

      \K0        Enter command      Buffers cleared     Buffers cleared
                 mode, do not       and break sent to   and break sent to
                 send break to      remote modem.       DTE.
                 remote modem.

      \K1        Buffers cleared    Buffers cleared     Buffers cleared
                 and break sent     and break sent to   and break sent to
                 to remote modem.   remote modem.       DTE.

      \K2        Enter command      Send break to       Send break to DTE
                 mode, do not       remote modem        immediately.
                 send break to      immediately.
                 remote modem.

      \K3        Send break to      Send break to       Send break to DTE
                 remote modem       remote modem        immediately.
                 immediately.       immediately.

      \K4        Enter command      Send break to       Send break to
                 mode, do not       remote modem with   remote modem with
                 send break to      transmitted data.   transmitted data.
                 remote modem.

   \K5          Send break with    Send break to       Send break to
                 transmitted        remote modem with   remote modem with
                 data.              transmitted data.   transmitted data.

                                COMPRESSION

  Type:          Configuration

  Format:        AT %Cn

  Example:       AT %C1 &B0<CR>

  Description:   Selects data compression.

    Command                              Function

      %C0        Data compression disabled.

      %C1        MNP5 enabled.

      %C2        V.42bis enabled.

   %C3          MNP5 and V.42bis 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        Reliable mode enabled.

   \N3          Auto-reliable mode enabled.

      \N4        LAPM mode enabled.

      \N5        MNP mode enabled.

                    FALL FORWARD/ADJUST TRANSMIT LEVEL

  Type:          Configuration

  Format:        AT [cmds] -Un [cmds]

  Example:       AT -U1 &W<CR>

  Description:   Forces a fall forward and change in transmit level
                 during fall forward

    Command                              Function

      -U0        Automatic attenuation to -10dBm

      -U1        Automatic attenuation down to -18dBm

      -U2        Automatic attenuation down to22dBm

      -U3        automatic attenuation down to -25dBm

      -U4        At 2400bps, force transmit level to -10 dBm

      -U5        At 2400bps, force transmit level to -18 dBm

      -U6        At 2400bps, force transmit level to -22 dBm

      -U7        At 2400bps, force transmit level to -25 dBm

                                 FALLBACK

  Type:          Immediate

  Format:        AT [cmds] -B [cmds]

  Example:       AT -B &W<CR>

  Description:   Forces fallback to 1200bps at -10dBm

                       FLOW CONTROL CHARACTER - XOFF

  Type:          Register

  Format:        AT [cmds] S33=n [cmds]

  Example:       ATS33=20<CR>

  Default:       19

  Range:         0-255

  Unit:          ASCII

  Description:   Sets the character used to represent XOFF.

                       FLOW CONTROL CHARACTER - XON

  Type:          Register

  Format:        AT [cmds] S32=n [cmds]

  Example:       ATS32=20<CR>

  Default:       17

  Range:         0-255

  Unit:          ASCII

  Description:   Sets the character used to represent XON.

                      LEASED LINE TRANSMISSION LEVEL

  Type:          Configuration

  Format:        AT [cmds] S99=n [cmds]

  Example:       AT S99=8<CR>

  Default:       10

  Range:         0 to 15

  Unit:          -1 dBm

  Description:   Sets the signal level for transmission when in
                 leased-line mode.

                             LINE SIGNAL LEVEL

  Type:          Immediate

  Format:        AT [cmds] %L [cmds]

  Example:       AT %L &W<CR>

  Range:         9-43

  Unit:          -1dB

  Description:   Returns received line signal level.

                             MNP10 COMPRESSION

  Type:          Configuration

  Format:        AT [cmds] -Kn [cmds]

  Example:       AT %C1 -K1 <CR>

  Description:   Selects MNP10 data compression.

    Command                              Function

      -K0        MNP10 disabled.

   -K1          MNP10 enabled.

                          MNP10 LINK NEGOTIATION

  Type:          Configuration

  Format:        AT [cmds] *Hn [cmds]

  Example:       AT *H0 -Q1 <CR>

  Description:   Sets the speed at which MNP10 link negotiation will
                 occur.

    Command                              Function

   *H0          Link will be negotiated at highest possible speed.

      *H1        Link will be negotiated at 1200bps.

                         MNP10 POWER LEVEL ADJUST

  Type:           Configuration

  Format:         AT [cmds] )Mn [cmds]

  Example:        AT )M1 %C1<CR>

  Description:    Controls automatic transmit power level adjustment
                  during MNP 10 link negotiation.

     Command                             Function

   )M0           Power level adjustment disabled.

       )M1        Power level adjustment enabled.

                              PROTOCOL/SPEED

  Format         AT [cmds] S37=n [cmds]

  Example:       ATS37=11<CR>

  Default:       0

  Range:         0-21

  Unit:          Bit-mapped.

  Description:   Selects protocol and line speed.

    Command                              Function

   S37=0        Auto-select fastest common protocol.

     S37=1       Connect at 300bps

     S37=2       Connect at 300bps

     S37=3       Connect at 300bps.

     S37=4       Not used.

     S37=5       Connect at 1200bps V.22.

     S37=6       Connect at 2400bps.V.22bis

     S37=7       Connect at 75/1200bps.V.32

     S37=8       Connect at 4800bps V.32bis/V.32.

     S37=9       Connect at 9600bps V.32bis/V.32

     S37=10      Connect at 12Kbps V.32bis

     S37=11      Connect at 14.4Kbps V.32bis

     S37=12      Connect at V.32bis 7200bps

                           REPORT SIGNAL QUALITY

  Type:          Configuration

  Format:        AT [cmds] %Q [cmds]

  Example:       AT %Q &W<CR>

  Description:   Reports signal quality.

                                SLEEP TIMER

  Format                  AT [cmds] S24=n [cmds]

  Example:                ATS24=40<CR>

  Default:                1

  Range:                  0 - 255

  Unit:                   10 second

  Description:            Maximum duration of DTE and DCE inactivity
                          allowed prior to initiating low-power sleep
                          mode.

