
PRACTICAL PERIPHERALS, INC.

PC144MT II/MC144MT II

Modem Type                   Data (synchronous/asynchronous)/Fax
Maximum Data Rate            14.4Kbps
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.32, V.32bis
Fax Modulation Protocol      ITU-T V.17, V.27ter, V.29
Error Correction/Compression MNP5, V.42, V.42bis

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                                CONNECTIONS

        Purpose           Location            Purpose            Location

  Line in                   CN1       RS-232/422                   CN4

  Line out                  CN2       Power switch                 SW1

  DC Power                  CN3

                             DIAGNOSTIC LED(S)

    LED         Color         Status                 Condition

     AA          Red            On              Auto-answer enabled

     AA          Red            Off            Auto-answer disabled

     AA          Red         Blinking             Line is ringing

     RX          Red            On            Modem is receiving data

     RX          Red            Off         Modem is not receiving data

     TX          Red            On          Modem is transmitting data

     TX          Red            Off       Modem is not transmitting data

     CD          Red            On            Carrier signal detected

     CD          Red            Off         Carrier signal not detected

     CD          Red         Blinking           Modem is retraining

     OH          Red            On               Modem is off-hook

     OH          Red            Off              Modem is on-hook

     HS          Red            On         Modem connected at 4800bps or
                                                      faster

     HS          Red            Off         Modem connected at less than
                                                      4800bps

     TR          Red            On              DTR signal is high

     TR          Red            Off              DTR signal is low

     MR          Red            On                   Power on

     MR          Red            Off                  Power off

                          Proprietary Command Set

                            COMMAND SET DISABLE

  Type:          Configuration

  Format:        AT [cmds] %DUMBn [cmds]

  Example:       AT %DUMB0 &W<CR>

  Description:   Stops modem from responding to commands.

  Command                                Function

   %DUMB0       Command set enabled.

  %DUMB1         Command set disabled.

                                  REDIAL

  Type:          Immediate

  Format:        AT [cmds] DL

  Example:       AT M0 DL<CR>

  Description:   Redials the last number called.

                            REPORT INFORMATION

  Type:          Immediate

  Format:        AT [cmds] In [cmds]

  Example:       AT IO<CR>

  Description:   Commands modem to display information requested.

    Command                              Function

       I0        Reports modem model and speed.

       I1        Reports checksum number.

       I2        Reports checksum result.

       I3        Reports firmware version.

       I4        Reports current command settings.

