UNIDENTIFIED

2400BPS MODEM (0302AMC)

Card Type                    Modem (asynchronous)
Chip Set                     Unidentified
Maximum Data Rate            2400bps
Data Bus                     8-bit ISA
Data Modulation Protocol     Bell 103A/212A

                             ITU-T V.22, V.22bis
Error Correction/Compression MNP5, V.42, V.42bis

[Image]

                                CONNECTIONS

         Function            Label            Function             Label

  Line out                        CN1       Line in                 CN2

                           SERIAL PORT ADDRESS

    Setting        JP1/A          JP1/B          JP1/C          JP1/D

  COM1 (3F8h)      Closed          Open         Closed          Open

  COM2 (2F8h)      Closed          Open          Open          Closed

  COM3 (3E8h)       Open          Closed        Closed          Open

  COM4 (2E8h)       Open          Closed         Open          Closed

                      INTERRUPT

  Setting    JP1/E      JP1/F      JP1/G      JP1/H

     2        Open       Open      Open      Closed

     3        Open      Closed     Open       Open

     4       Closed      Open      Open       Open

     5        Open       Open     Closed      Open

           WAIT STATE

  Setting    JP1/I      JP1/J

     0       Closed     Open

     1        Open     Closed

                         Proprietary AT Command Set

  BIT MAPPED REGISTERS

  Register     Default

    S14          170

    S21           0

    S22          118

    S23           7

    S27          64

    S28           0

                             DTMF ATTENUATION

  Type:          Configuration

  Format:        AT [cmds] %Dn [cmds]

  Default:       0

  Range:         1-7

  Unit:          2 dBm

  Description:   Controls DTMF attenuation

                            SECONDARY DEFAULTS

  Type:                   Immediate

  Format:                 AT [cmds] %J [cmds]

  Description:            Sets all S registers and AT commands to AT&F
                          default except; S6=3s, range 3-255; S11=95ms,
                          range 60-255; %L3, 6dBm; %D1, 2dBm.

                                TEST MODES

  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 in progress

                1    Remote digital loopback in progress

    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

                           TRANSMIT ATTENUATION

  Type:          Configuration

  Format:        AT [cmds] %Ln [cmds]

  Default:       0

  Range:         1-7

  Unit:          2 dBm

  Description:   Controls transmit attenuation