ANGIA COMMUNICATIONS, INC.

DATASTAR

Modem Type                   Data (asynchronous)/Fax
Maximum Data Rate            2400bps
Maximum Fax Rate             9600bps
Data Bus                     PCMCIA TYPE II
Fax Class                    Class I & II
Data Modulation Protocol     Bell 103A/212A

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

                                                                      V1555

                         Proprietary AT Command Set

                          BIT-MAPPED REGISTER S14

  Format                   AT [cmds] S14=n [cmds]

  Example:                 ATS14=170<CR>

  Default:                 170

  Range:                   0-174

  Unit:                    Bit-mapped

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

       Bit         Value                       Function

        0          0          Not used.

        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          Command recognition enabled.

        5          0          Tone dial enabled.

                   » 1        Pulse dial enabled.

        6          0          Not used.

        7          0          Answer mode enabled.

                   » 1        Originate mode enabled.

                          BIT-MAPPED REGISTER S21

  Format                   AT [cmds] S21=n [cmds]

  Example:                 ATS21=0<CR>

  Default:                 0

  Range:                   0 - 184

  Unit:                    Bit-mapped

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

       Bit         Value                        Function

        0          » 0         Selects RJ-11

      2, 1         0           Not used.

      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           Not used.

        7          » 0         Long Space Disconnect function disabled.

                   1           Long Space Disconnect function enabled.

                          BIT-MAPPED REGISTER S27

  Format                  AT [cmds] S27=n [cmds]

  Example:                AT S27=64 <CR>

  Default:                64

  Range:                  0 - 115

  Unit:                   Bit-mapped

  Description:            Selects sync/async mode, Line type, internal
                          clock, and ITU-T/Bell modes.

      Bit        Value                         Function

     1, 0        » 00        Asynchronous mode, serial port speed follows
                             connect speed.
                 01
                             Asynchronous command mode and synchronous
                 10          connect mode.

                 11          Asynchronous command mode and synchronous
                             connect mode, DTR dialing enabled.

                             Asynchronous command mode on low DTR,
                             synchronous connect mode on high DTR.

     3, 2        0           Not used.

     5, 4        » 00        Internal DCE transmit clock source.

                 01          External DTE transmit clock source.

                 10          Remote DCE transmit clock source.

                 11          Internal DCE transmit clock source.

       6         0           CCITT mode.

                 » 1         Bell mode.

                                TEST MODES

  Format                  AT [cmds] S16=n [cmds]

  Example:                ATS16=40<CR>

  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.