
BEST DATA PRODUCTS, INC.

1442F INTERNAL FAX/DATA MODEM

Card Type                    Fax, Modem (synchronous/asynchronous)
Chip Set                     Unidentified
Maximum Data Rate            14.4Kbps
Maximum Fax Rate             14.4Kbps
Data Bus                     8-bit ISA
Fax Class                    Class I & II
Data Modulation Protocol     Bell 103/212A

                             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, V.42, V.42bis

                                                                      V2327

 MISCELLANEOUS TECHNICAL NOTES
           Diagram not available

            SERIAL PORT ADDRESS

    Setting        SW1/5          SW1/6

  COM1 (3F8h)        On            On

  COM2 (2F8h)        On            Off

  COM3 (3E8h)       Off            On

  COM4 (2E8h)       Off            Off

                 INTERRUPT SELECTION

  Setting    SW1/1      SW1/2      SW1/3      SW1/4

     3         On        Off        Off        Off

     4        Off         On        Off        Off

     5        Off        Off        On         Off

     7        Off        Off        Off        On

                           SUPPORTED COMMAND SET

                             Basic AT Commands

  AT, +++, Comma, A/

  A, B, C, D, E, F, , H, L, M, N, O, P, Q, S, T, V, W, X, Y, Z

  &C, &D, &F, &G, &J, &K, &L, &M, &P, &Q, &R, &S, &T, &V, &W, &X, &Y, &Z

                           Extended AT Commands

  \A, \B, \G, \L, \O, \T, \U, \Y, \Z, %E, %L, %Q

                                S Registers

  S0, S1, S2, S3, S4, S5, S6, S7, S8, S9, S10, S11, S12, S16, S18, S22,
  S25, S26, S36, S38, S46

  S48, S82, S86, S91, S95

  Note: See MHI Help file for full command documentation.

                         Proprietary AT Command Set

                          BIT-MAPPED REGISTER S14

  Format:               AT [cmds] S14=n [cmds]

  Default:              170

  Range:                0-255

  Unit:                 Bit-mapped

  Description:          Controls local echo, command echo, result codes
                        and display, dial mode, and answer/originate
                        mode.

   Bit        Value                         Function

    0                0  Disable local echo

                    1   Enable local echo

    1                0  Command echo disabled

                    1   Command echo enabled

    2                0  Result codes enabled

                    1   Result codes disabled

    3                0  Display result codes in numeric format

                    1   Display result codes in verbose format

    4                0  Smart mode enabled

                    1   Dumb mode enabled

    5                0  Tone dial enabled

                    1   Pulse dial enabled

    6                0  Result codes enabled

                    1   Result codes enabled when originating

    7                0  Answer mode enabled

                    1   Originate mode enabled

                          BIT-MAPPED REGISTER S21

  Format                 AT [cmds] S21=n [cmds]

  Default:               0

  Range:                 0-255

  Unit:                  Bit-mapped

  Description:           Selects jack type, setting profile, CTS/DCD/DSR
                         signals, low DTR action, and the long space
                         disconnect function.

    Bit       Value                          Function

     0                0  Selects RJ-11, RJ-41S, or RJ45S jack

                     1   Selects RJ-12 or RJ-13 jack

     1                0  Default profile

                     1   User-defined profile

     2                0  CTS follows RTS

                     1   CTS forced high

   4, 3              00  DTR signal ignored

                     01  Modem goes to command mode on low DTR

                     10  Modem disconnects on low DTR; Auto-Answer is
                         disabled.
                    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 S23

  Format                AT [cmds] S23=n [cmds]

  Default:              7

  Range:                0-191

  Unit:                 Bit-mapped

  Description:          Grants/denies remote digital loopback, controls
                        DTE rate and parity, and sets guard tone.

    Bit       Value                         Function

     0              0   Remote digital loopback denied

                   1    Remote digital loopback allowed

   3 - 1          000   Sets serial port speed to 0-300bps

                  001   Sets serial port speed to 600bps

                  010   Sets serial port speed to 1200bps

                  011   Sets serial port speed to 2400bps

                  100   Sets serial port speed to 4800bps

                  101   Sets serial port speed to 9600bps

                  110   Sets serial port speed to 19200bps

                 111    Sets serial port speed to 38400bps

   5, 4            00   Parity even

                   01   Space Parity

                   10   Parity odd

                  11    Mark or No Parity

   7, 6            00   Guard tone disabled

                   01   Guard tone 550Hz enabled

                  10    Guard tone 1800Hz enabled

                          BIT-MAPPED REGISTER S27

  Format               AT [cmds] S27=n [cmds]

  Default:             64

  Range:               0-127

  Unit:                Bit-mapped

  Description:         Selects synchronous/asynchronous mode, line type,
                       clock source, and ITU-T/Bell modes.

   Bit       Value                          Function

  3, 1,          000   Asynchronous mode, serial port speed follows
    0                  connect speed
                 001
                       Asynchronous off-line command mode and synchronous
                 010   connect mode

                 011   Asynchronous off-line command mode; modem
                       autodials first number in directory, then
                 100   synchronous connect mode

                 101   Asynchronous off-line command mode on low DTR,
                       synchronous connect mode on high DTR
                 110
                       Modem returns OK
                111
                       Error correction mode

                       Asynchronous mode during Normal connect mode

                       Modem returns OK

    2              0   Switched line

                  1    Leased line

  5, 4            00   Local modem generates transmit clock source

                  01   Local DTE generates transmit clock source

                 10    Remote DCE/DTE generates transmit clock source

    6              0   ITU/T mode

                  1    Bell mode

                          BIT-MAPPED REGISTER S40

  Format               AT [cmds] S40=n [cmds]

  Default:             119

  Range:               0-255

  Unit:                Bit-mapped

  Description:         Controls connect mode, break handling, MNP block
                       size, and flow control.

    Bit      Value                          Function

   1, 0           00   Normal mode enabled

                  01   Direct mode enabled

                  10   Reliable mode enabled

                 11    Auto-reliable mode enabled

  4, 3, 2        000   \K0

                 001   \K1

                 010   \K2

                 011   \K3

                 100   \K4

                101    \K5

   6, 5           00   MNP block size is 64 characters

                  01   MNP block size is 128 characters

                  10   MNP block size is 192 characters

                 11    MNP block size is 256 characters

     7             0   Flow control disabled

                  1    Flow control enabled

                          BIT-MAPPED REGISTER S41

  Format           AT [cmds] S41=n [cmds]

  Default:         1

  Range:           0-7

  Unit:            Bit-mapped

  Description:     Selects compression, auto-retrain, and MNP mode.

   Bit    Value                           Function

    0          0   Data compression disabled

              1    Data compression enabled

    1          0   Auto-retrain disabled

              1    Auto-retrain enabled

    2          0   Stream mode for MNP

              1    Block mode for MNP

                                BREAK TYPE

  Type:                    Configuration

  Format:                  AT [cmds] \Kn [cmds]

  Description:             Configures action of break signal

     Command       Break from DTE     Break received      Break from DTE
                   during MNP mode     from remote        during Direct
                                          modem               mode

       \K0        Online command     Buffers cleared,   Online command
                  mode enabled,      break sent to      mode enabled,
                  send no break      DTE                send no break to
                  to remote modem                       remote modem

       \K1        Break sent to      Buffers cleared,   Break sent to
                  remote modem       break sent to      remote modem and
                  and buffers        DTE                buffers cleared
                  cleared

       \K2        Online command     Break sent         Online command
                  mode enabled,      immediately to     mode enabled,
                  send no break      DTE                send no break to
                  to remote modem                       remote modem

       \K3        Send break to      Break sent         Send break to
                  remote modem       immediately to     remote modem
                  immediately        DTE                immediately

       \K4        Online command     Break sent with    Online command
                  mode enabled,      received data to   mode enabled,
                  send no break      the DTE            send no break to
                  to remote modem                       remote modem

       \K5        Send break with    Break sent with    Send break with
                  transmitted        received data to   transmitted data
                  data               the DTE

                                COMPRESSION

  Type:          Configuration

  Format:        AT [cmds] %Cn [cmds]

  Description:   Selects data compression

    Command                              Function

      %C0        Data compression disabled

      %C1        Data compression enabled

                               CONNECT MODE

  Type:          Configuration

  Format:        AT [cmds] \Nn [cmds]

  Description:   Controls the type of connection the modem will operate
                 in

    Command                              Function

      \N0        Normal mode enabled

      \N1        Direct mode enabled

      \N2        Reliable mode enabled

      \N3        Auto-reliable mode enabled

                              DCE LINE SPEED

  Type:                Register

  Format               AT [cmds] S37=n [cmds]

  Description:         Sets the maximum allowable data exchange rate
                       attempted during handshake process.

       Command                              Function

        S37=0          Speed of last connection

        S37=1          300bps

        S37=2          300bps

        S37=3          300bps

        S37=5          1200bps

        S37=6          2400bps

        S37=8          4800bps

        S37=9          9600bps

       S37=10          12.0Kbps

       S37=11          14.4Kbps

       S37=12          7200bps

                             ECHO CANCELLATION

  Type:          Configuration

  Format:        AT [cmds] \En [cmds]

  Description:   Optimize echo cancellation

                            REPORT INFORMATION

  Type:          Immediate

  Format:        AT [cmds] In [cmds]

  Description:   Displays information requested

    Command                              Function

       I0        Reports product code

       I1        Reports ROM checksum

       I2        Tests and reports ROM checksum, as OK or ERROR

       I3        Reports firmware manufacturer identification and
                 checksum

       I4        Reports product capabilities

                          V.42 - CLEAR DICTIONARY

  Type:          Immediate

  Format:        AT [cmds] %P [cmds]

  Description:   Clears the V.42 encoder dictionary

                       V.42bis - COMPRESSION CONTROL

  Type:          Configuration

  Format:        AT [cmds] %Mn [cmds]

  Description:   Controls V.42bis data compression

    Command                              Function

      %M0        V.42bis disabled

      %M1        V.42bis when transmitting enabled

      %M2        V.42bis when receiving enabled

      %M3        V.42bis when transmitting/receiving enabled

                         V.42bis - DICTIONARY SIZE

  Type:          Configuration

  Format:        AT [cmds] %Dn [cmds]

  Description:   Select V.42 dictionary size

    Command                              Function

      %D0        Select 512 bytes

      %D1        Select 1024 bytes

      %D2        Select 2048 bytes

      %D3        Select 4096 bytes, one-way compression

                      V.42bis - MAXIMUM STRING LENGTH

  Type:          Immediate

  Format:        AT [cmds] %Sn [cmds]

  Default:       32

  Range:         6-250

  Unit:          Characters

  Description:   Selects string size for V.42bis compression

