ENTRE COMPUTER CENTER

ENTRE 2400B

Modem Type               Data (asynchronous)
Maximum Data Rate        2400bps
Data Bus                 8-bit ISA
Data Modulation Protocol Unidentified

[Image]

                                CONNECTIONS

         Purpose           Location            Purpose           Location

  Line out                    CN1       Line in                    CN2

                       SERIAL PORT CONFIGURATION

       Port              IRQ              SW1/3            SW1/4

  COM1: (3F8h)            4                On               Off

  » COM2: (2F8h)          3                Off              Off

  COM3: (3E8h)            4                On                On

  COM4: (2E8h)            3                Off               On

                                AUTO ANSWER

  Setting                                             SW1/2

  » Auto answer enabled                                Off

  Auto answer disabled                                 On

  Note: S14 holds the state of this switch at the time power turned on,
  or if a reset command is enabled.

                 DTR

  Setting                SW1/1

  » DTR normal            Off

  DTR forced high          On

             CD SIGNAL

  Setting               SW1/5

  » CD normal            Off

  CD forced high         On

                    SLOT 8 INSTALLATION

  Setting                                 SW1/6

  » Normal installation                    Off

  IBM XT slot 8 installation               On

                         Proprietary AT Command Set

                          BIT-MAPPED REGISTER S13

  Format                 AT [cmds] S13? [cmds]

  Example:               ATS13?<CR>

  Default:               Read-only

  Range:                 0 - 222

  Unit:                  Bit-mapped

  Description:           Displays extended result codes, parity, data
                         bits, and buffer overrflow.

      Bit       Value                         Function

       0        0            Not used.

       1        0            Extended result codes disabled.

                1            Extended result codes enabled.

       2        0            Parity disabled.

                1            Parity enabled.

       3        0            Odd parity.

                1            Even parity.

       4        0            7 data bits.

                1            8 data bits.

       5           N/A       Not used.

       6        0            Buffer is not full.

                1            Buffer overflow; ERROR result code sent.

       7        0            Space parity.

                1            Mark parity.

                          BIT-MAPPED REGISTER S14

  Format                  AT [cmds] S14? [cmds]

  Example:                ATS14?<CR>

  Default:                Read-only

  Range:                  0 - 239

  Unit:                   Bit-mapped

  Description:            Displays the state of SW1/2, echo, result
                          codes, tone/pulse dial, and speaker.

      Bit        Value                         Function

       0         0           SW1/2 off (Auto-answer).

                 1           SW1/2 on(Auto-answer).

       1         0           Echo disabled.

                 1           Echo enabled.

       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 dial

                 1           Pulse dial

       6         0           Speaker disabled

                 1           Speaker enabled until carrier signal is
                             detected.

       7         0           Speaker disabled.

                 1           Speaker enabled.

                          BIT-MAPPED REGISTER S15

  Format              AT [cmds] S15? [cmds]

  Example:            ATS15?<CR>

  Default:            Read-only

  Range:              0 - 127

  Unit:               Bit-mapped

  Description:        Displays baud rate, answer/originate, duplex, CD
                      signal.

     Bit       Value                         Function

     1, 0      00         2400bps.

               01         110bps.

               10         300bps.

               11         1200bps.

      2            0      Answer mode.

                  1       Originate mode.

      3            0      Half duplex.

                  1       Full duplex.

     5, 4      00         2400bps.

               01         110bps.

               10         300bps.

               11         1200bps.

      6            0      CD normal.

                  1       CD forced high.

                                TEST MODES

  Format                  AT [cmds] S16? [cmds]

  Example:                ATS16?<CR>

  Default:                Read-only

  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.