
MAXTECH CORPORATION

MAXTECH 9424H

Card Type                    Modem(asynchronous)
Chip Set                     Unidentified
Maximum Data Rate            2400bps
Maximum Fax Rate             9600bps
Data Bus                     8 bit ISA
Fax Class                    Class I
Data Modulation Protocol     Bell 103A/212A

                             ITU-T V.21, V.22, V.22bis
Fax Modulation Protocol      ITU-T V.21CH2, V.27ter, V.29
Error Correction/Compression MNP5, V.42, V.42bis

[Image]

                                CONNECTIONS

         Function            Label            Function             Label

  Line in                         CN1       Line out                CN2

                     SERIAL PORT ADDRESS

       Setting                J1                  J2

     COM1 (3F8h)       Pins 1 & 2 closed   Pins 1 & 2 closed

     COM2 (2F8h)       Pins 2 &3 closed    Pins 1 & 2 closed

     COM3 (3E8h)       Pins 1 & 2 closed   Pins 2 &3 closed

     COM4 (2E8h)       Pins 2 &3 closed    Pins 2 &3 closed

                      INTERRUPT

  Setting      J3         J4        J5         J6

     2         On        Off        Off        Off

     3        Off         On        Off        Off

     4        Off        Off        On         Off

     5        Off        Off        Off        On

                         Proprietary AT Command Set

                          BIT-MAPPED REGISTER S14

  Format              AT [cmds] S14=n [cmds]

  Default:            170

  Range:              0 - 174

  Unit:               Bit-mapped

  Description:        Controls command echo, result codes, dialing mode,
                      and answer/originate mode

   Bit      Value                          Function

    0            0    Not used

    1             0   Command echo off

                 1    Command echo on

    2             0   Result codes enabled

                 1    Result codes disabled

    3             0   Numeric result codes

                 1    Verbose result codes

    4            0    Not used

    5             0   Tone dialing selected

                 1    Pulse dialing selected

    6            0    Not used

    7             0   Answer mode selected

                 1    Originate mode selected

                          BIT-MAPPED REGISTER S21

  Format                 AT [cmds] S21=n [cmds]

  Default:               0

  Range:                 0 - 249

  Unit:                  Bit-mapped

  Description:           Selects jack type, low DTR action, DCD signal,
                         DSR signal, and the Long Space Disconnect
                         function

    Bit       Value                          Function

     0               0   Selects RJ-11jack

                    1    Selects RJ-12 or RJ-13 jack

     1              0    Not used

     2              0    Not used

   4, 3             00   DTR signal ignored

                    01   Modem goes to command mode on low DTR

                    10   Modem disconnects on low DTR

                   11    Modem is initialized on low DTR

     5               0   DCD forced high

                    1    DCD normal

     6               0   DSR forced high

                    1    DSR normal

     7               0   Long Space Disconnect function disabled

                    1    Long Space Disconnect function enabled

                          BIT-MAPPED REGISTER S22

  Format                AT [cmds] S22=n [cmds]

  Default:              118

  Range:                0 - 255

  Unit:                 Bit-mapped

  Description:          Controls volume and speaker settings, result
                        codes, and make/break pulse ratio

    Bit       Value                         Function

   1, 0            00   Not used

                   01   Low volume setting

                   10   Medium volume setting

                  11    Highest volume setting

   3, 2            00   Speaker disabled

                   01   Speaker enabled until carrier signal detected

                   10   Speaker enabled

                  11    Speaker off during dialing

  6, 5 ,4         000   Busy and dialtone detection disabled, result
                        codes 0-4 enabled
                  001
                        Not used
                  010
                        Not used
                  011
                        Not used
                  100
                        Busy and dialtone detection disabled, result
                  101   codes 0-5, 10 enabled

                  110   Busy tone detection disabled, dialtone detection
                        enabled, result codes 0-6, 10 enabled
                 111
                        Busy tone detection enabled, dialtone detection
                        disabled, result codes 0-5, 7, 10 enabled

                        Busy and dialtone detection enabled, all result
                        codes enabled

     7              0   39/61ms at 10pps (North America)

                   1    33/67ms at 10pps (Europe)

                          BIT-MAPPED REGISTER S23

  Format              AT [cmds] S23=n [cmds]

  Default:            7

  Range:              0-247

  Unit:               Bit-mapped

  Description:        Grants/denies remote digital loopback, connect
                      speed, parity and guard tone

   Bit      Value                          Function

    0             0   Remote digital loopback denied

                 1    Remote digital loopback allowed

   2, 1          00   Connect at 0-300bps

                 01   Not used

                 10   Connect at 1200bps

                11    Connect at 2400bps

    3            0    Not used

   5,4           00   Parity even

                 01   Space parity

                 10   Parity odd

                11    No Parity

   7, 6          00   Guard tone disabled

                 01   Guard tone 550Hz enabled

                 10   Guard tone 1800Hz enabled

                11    Not used

                          BIT-MAPPED REGISTER S27

  Format:               AT [cmds] S27=n [cmds]

  Default:              64

  Range:                0-127

  Description:          Asynchronous operation, leased/switched line,
                        ITU-U/Bell operation

      Bit         Value                       Function

    3, 1, 0         0x00    Asynchronous operation

       2                 0  Switched line

                        1   Leased line

       4                0   Not used

       5                0   Not used

       6                 0  V.21/V.22

                        1   Bell 212A

                                TEST STATUS

  Format           AT [cmds] S16=n [cmds]

  Default:         0

  Range:           0 - 122

  Unit:            Bit-mapped

  Description:     Contains status of loopback tests

   Bit    Value                           Function

    0          0   Local analog loopback test disabled

              1    Local analog loopback test enabled

    1         0    Not used

    2          0   Local digital loopback test disabled

              1    Local digital loopback test enabled

    3          0   Remote digital loopback test disabled

              1    Remote digital loopback test enabled

    4          0   Remote digital loopback test not in progress

              1    Remote digital loopback test in progress

    5          0   Remote digital loopback test with test and error
                   disabled
              1
                   Remote digital loopback test with test and error
                   enabled

    6          0   Local digital loopback test with self test disabled

              1    Local digital loopback test with self test enabled

