
VEN-TEL, INC.

PCM144FAX II

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

                             ITU-T V.21, V.22, V.22bis, V.32, V.32bis
Fax Modulation Protocol      ITU-T V.17, V.21CH2, V.27ter, V.29
Error Correction/Compression MNP5, MNP10, V.42, V.42bis

[Image]

                        BASE I/O ADDRESS SELECTION

    Address         SW1/1          SW1/2          SW1/3         SW1/4

  3F8h (COM1:)        On            Off            Off            On

  2F8h (COM2:)       Off            Off            On            Off

  3E8h (COM3:)        On            On             Off            On

  2E8h (COM4:)       Off            Off            On            Off

                        INTERRUPT SELECTION

   IRQ      SW1/1    SW1/2     J1/A      J1/B      J1/C     J1/D

    3        On       Off      Open      Open      Open     Open

    4        Off       On      Open      Open      Open     Open

    5        Off      Off      Closed    Open      Open     Open

    6        Off      Off      Open      Closed    Open     Open

    7        Off      Off      Open      Open     Closed    Open

                         Proprietary AT Command Set

                               ABORT DIALING

  Type:            Register

  Format:          AT [cmds] S64=n [cmds]

  Example:         AT S64=1<CR>

  Description:     Selects whether dialing and handshaking sequences can
                   be interrupted.

     Command                             Function

   S64=0          Dialing and handshaking are aborted on receipt of a
                   character from the serial port.

  S64=1            Characters received from the serial port during
                   dialing and handshaking are ignored.

                          BIT-MAPPED REGISTER S14

  Format                  AT [cmds] S14=n [cmds]

  Example:                ATS14=139<CR>

  Default:                171

  Range:                  0 - 255

  Unit:                   Bit-mapped

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

      Bit          Value                       Function

       0             1       Not used.

       1             0       Command echo function disabled.

                  1         Command echo function enabled.

       2          0         Result code sending enabled.

                     1       Result code sending disabled.

       3             0       Numeric format enabled.

                  1         Verbose format enabled.

       4             0       Not used.

       5             0       Tone dialing mode enabled.

                  1         Pulse dialing mode enabled.

       6          0         Result codes normal.

                     1       Result codes disabled in answer mode.

       7             0       Answer mode enabled.

                  1         Originate mode enabled.

                          BIT-MAPPED REGISTER S21

  Format                    AT [cmds] S21=n [cmds]

  Example:                  ATS21=1<CR>

  Default:                  0

  Range:                    0 - 255

  Unit:                     Bit-mapped

  Description:              Controls low DTR action, DCD signal, and the
                            Long Space Disconnect function.

       Bit           Value                      Function

        0              0        Not used.

        1            0         Profile 0 enabled.

                       1        Profile 1 enabled.

     4, 3, 2         000       DTR signal ignored.

                    001         Modem goes to command mode on low DTR.

                    010         Modem disconnects on low DTR. Auto-Answer
                                is disabled.
                    011
                                Modem is initialized on low DTR.
                    100
                                Modem dials default number on low DTR.

       6, 5          00        DCD signal forced high.

                    01          DCD signal normal.

                    10          DCD signal forced high except during
                                disconnect.

        7            0         Long Space Disconnect function disabled.

                    1           Long Space Disconnect function enabled.

                          BIT-MAPPED REGISTER S22

  Format                    AT [cmds] S22=n [cmds]

  Example:                  ATS22=114<CR>

  Default:                  0

  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          Lowest volume setting.

                    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 enabled following dialing, then
                                disabled after carrier signal detected.

     6, 5 ,4        000         Busy and dialtone detection disabled,
                                result codes 0-4 enabled.
                    100
                                Busy and dialtone detection disabled,
                    101         result codes 0-5, 10 enabled.

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

                                Busy tone detection enabled, dialtone
                                detection disabled, result codes 0-5, 7,
                                10 enabled.

                                Busy and dialtone detection enabled,
                                result codes 0-7, 10 enabled.

        7              0        Not used

                          BIT-MAPPED REGISTER S23

  Format                    AT [cmds] S23=n [cmds]

  Example:                  ATS23=114<CR>

  Default:                  0, read-only (see note)

  Range:                    0 - 255

  Unit:                     Bit-mapped

  Description:              Controls guard tones. Also indicates detected
                            serial port speed and parity. Also provides
                            storage for remote digital loopback tests.

  Note:                     All bits except bits 6 and 7 are read-only.

        Bit            Value                     Function

         0              N/A      Reserved for internal use.

      3, 2, 1        000         Local speed detected at 300bps.

                     001         Local speed detected at 600bps.

                     010         Local speed detected at 1200bps.

                     011         Local speed detected at 2400bps.

                     100         Local speed detected at 4800bps.

                      101       Local speed detected at 9600bps.

                     110         Local speed detected at 19200bps.

                     111         Local speed detected at 38400bps.

       5, 4           00        Even parity.

                     10          Odd parity.

                     11          No parity.

       7, 6           00        Guard tone disabled.

                     01          550Hz guard tone enabled.

                     10          1800Hz guard tone enabled.

                          BIT-MAPPED REGISTER S27

  Format                   AT [cmds] S27=n [cmds]

  Example:                 ATS27=201<CR>

  Default:                 73

  Range:                   0 - 255

  Unit:                    Bit-mapped

  Description:             Controls communications mode, DSR signal, and
                           protocol type.

  Note:                    Be aware that bits 2 and 3 are out of order.

       Bit           Value                      Function

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

                    110        Error-correcting mode.

                               Asynchronous mode, serial port speed
                               locked.

        2              0       Not used.

        4              0       Not used.

        5              0       Not used.

        6            0        Select CCITT protocols.

                    1          Select Bell protocols.

        7            0        DSR forced high.

                    1          DSR normal.

                          BIT-MAPPED REGISTER S39

  Format                   AT [cmds] S39=n [cmds]

  Example:                 ATS39=201<CR>

  Range:                   0 - 31

  Unit:                    Bit-mapped

  Description:             Controls flow control and line type.

       Bit           Value                      Function

     2, 1, 0           000     Flow control disabled.

                       011     Hardware flow control enabled.

                       100     Normal software flow control enabled.

                       101     Transparent software flow control enabled.

                      110      Unidirectional software flow control
                               enabled.

       4, 3            00      Switched line.

                       01      Leased line originate mode.

                       10      Leased line answer mode.

                                COMPRESSION

  Type:          Register

  Format:        AT [cmds] S41=n [cmds]

  Example:       ATS41=2<CR>

  Description:   Selects data compression and error correction.

    Command                              Function

     S41=0       Data compression disabled.

     S41=1       Data compression enabled.

     S41=2       Error correction enabled.

     S41=3       Data compression and error correction enabled.

                                COMPRESSION

  Type:          Configuration

  Format:        AT %Cn

  Example:       AT %C0 *Y1<CR>

  Description:   Selects data compression.

    Command                              Function

  %C0            Data compression disabled.

  %C1            Data compression enabled.

  %C2            Data correction enabled.

   %C3          Data compression and correction enabled.

                               FLOW CONTROL

  Type:          Configuration

  Format:        AT [cmds] \Gn [cmds]

  Example:       AT G1 &K3<CR>

  Description:   Selects modem port flow control.

    Command                              Function

   \G0          Flow control disabled.

  \G1            Flow control enabled.

                              LOOPBACK TESTS

  Format              AT [cmds] S16=n [cmds]

  Example:            ATS16=32<CR>

  Default:            0

  Range:              0 - 255

  Unit:               Bit-mapped

  Description:        Enables loopback tests.

  Note:               Bit 3 is read-only.

     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       Modem is not performing remote digital loopback
                         test.
               1
                         Modem is performing remote digital loopback
                         test.

      4         0       Remote digital loopback test disabled.

               1         Remote digital loopback test enabled.

      5         0       Remote digital loopback with local self-test
                         disabled.
               1
                         Remote digital loopback with local self-test
                         enabled.

      6         0       Local analog loopback with local self-test
                         disabled.
               1
                         Local analog loopback with local self-test
                         enabled.

                             MNP10 COMPRESSION

  Type:          Configuration

  Format:        AT [cmds] -Kn [cmds]

  Example:       AT %C1 -K1 -Q0 <CR>

  Description:   Selects MNP10 data compression.

    Command                              Function

   -K0          MNP10 disabled.

  -K1            MNP10 enabled.

  -K2            MNP10 enabled on originate mode only.

                              MNP10 FALL-BACK

  Type:          Configuration

  Format:        AT [cmds] -Qn [cmds]

  Example:       AT *H0 -Q1 <CR>

  Description:   Allows MNP10 to fall back to speeds slower than 4800bps.

    Command                              Function

  -Q0            MNP10 at 2400 and 1200bps disabled.

   -Q1          MNP10 at 2400 and 1200bps enabled.

                          MNP10 LINK NEGOTIATION

  Type:          Configuration

  Format:        AT [cmds] *Hn [cmds]

  Example:       AT *H0 -Q1 <CR>

  Description:   Sets the speed at which MNP10 link negotiation will
                 occur.

    Command                              Function

   *H0          Link will be negotiated at highest possible speed.

  *H1            Link will be negotiated at 1200bps.

  *H2            Link will be negotiated at 4800bps.

                         MNP10 POWER LEVEL ADJUST

  Type:           Configuration

  Format:         AT [cmds] )Mn [cmds]

  Example:        AT )M1 %C1<CR>

  Description:    Controls automatic transmit power level adjustment
                  during MNP 10 link negotiation.

     Command                             Function

   )M0           Power level adjustment disabled.

  )M1             Power level adjustment enabled.

                            ROAD KEY CUSTOMIZE

  Type:                Configuration

  Format:              AT [cmds] *A^x^x^x^x [cmds]

  Example:             AT *A^M^H^I^I &W<CR>

  Description:         Sets the key for Remote Options Access and
                       Downloading (^ indicates ctrl key depressed). The
                       default is ^R^O^A^D.

                              ROAD KEY ENABLE

  Type:          Configuration

  Format:        AT [cmds] *Bn [cmds]

  Example:       AT *B0 *U O<CR>

  Description:   Enables Remote Options Access and Downloading.

    Command                              Function

   *B0          R.O.A.D. disabled.

  *B1            R.O.A.D. enabled.

                             ROAD KEY INITIATE

  Type:                 Immediate

  Format:               AT [cmds] *U [cmds]

  Example:              AT *B0 *U O<CR>

  Description:          Commands the modem to transmit stored Remote
                        Access Options and Downloading key. The modem
                        must have already connected.

