CARDINAL TECHNOLOGIES,INC.

MB2400EX

Card Type              Modem (synchronous/asynchronous)
Chip Set               Unidentified
Maximum Data Rate      2400bps
Data Bus               External
Data Modulation        Bell 103/212A
Protocol
                       ITU-T V.21, V.22, V.22bis

[Image]

                                CONNECTIONS

         Function           Label             Function             Label

  Line in                        CN1       DC power                 CN4

  Line out                       CN2       Power switch             SW1

  RS-232/422                     CN3

                             DIAGNOSTIC LED(S)

   LED       Color      Status                   Condition

    HS        Red         On          Modem is operating at 2400bps or
                                                   faster

    HS        Red         Off         Modem is operating at slower than
                                                  2400bps

    AA        Red         On                Auto-answer enabled

    AA        Red         Off               Auto-answer disabled

    AA        Red       Blinking              Phone is ringing

    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

    MR        Red       Blinking             Modem in test mode

                         Proprietary AT Command Set

                            PULSE DIALING RATIO

  Type:          Configuration

  Format:        AT [cmds] &Pn [cmds]

  Description:   Selects pulse dial make/break ratio

    Command                              Function

      &P0        39/61ms at 10pps (North America)

      &P1        34/66ms at 10pps (British)

                            REPORT INFORMATION

  Type:          Immediate

  Format:        AT [cmds] In [cmds]

  Description:   Displays information requested

    Command                              Function

       I0        Reports modem code

       I1        Reports ROM checksum

       I2        Tests and reports ROM checksum

       I3        Reports version information

                          STORE TELEPHONE NUMBER

  Type:                  Configuration

  Format:                AT [cmds] &Zn=(phone # & modifiers)

  Description:           Writes selected telephone numbers into the
                         non-volatile memory at location n

  Note:                  The characters described in the D command are
                         valid for use in the &Z command; telephone
                         numbers and modifiers can include up to 30
                         characters.

                                TEST MODES

  Type:              Register

  Format:            AT [cmds] S16=n [cmds]

  Default:           0

  Range:             0-125

  Unit:              Bit-mapped

  Description:       Controls loopback tests: analog, digital, remote
                     digital, and self tests

   Bit      Value                          Function

    0            0   Local analog loopback not in progress

                1    Local analog loopback in progress

    1           0    Not used

    2            0   Local digital loopback not in progress

                1    Local digital loopback in progress

    3            0   Modem not in remote digital loopback

                1    Remote digital loopback in progress

    4            0   Remote digital loopback not requested

                1    Remote digital loopback requested

    5            0   Remote digital loopback w/ self-test not in progress

                1    Remote digital loopback w/ self-test in progress

    6            0   Local analog loopback w/ self-test not in progress

                1    Local analog loopback w/ self-test in progress