EVEREX SYSTEMS,INC.

EVERCOM INTERNAL MODEM

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

                         ITU-T V.22, V.22bis

[Image]

                                CONNECTIONS

         Function            Label            Function             Label

  Line in                         CN1       Line out                CN2

                        USER CONFIGURABLE SETTINGS

                      Setting                         Label      Position

  DCD normal                                          SW1/4        Off

  DCD forced high                                     SW1/4        On

  RJ11, RJ14, RJ41S, or RJ45 jack type                SW1/5        Off

  RJ12 or RJ13                                        SW1/5        On

            SERIAL PORT ADDRESS

    Setting        SW1/1          SW1/2

  COM1 (3F8h)       Off            Off

  COM2 (2F8h)        On            Off

  COM3 (3E8h)       Off            On

  COM4 (2E8h)        On            On

                           INTERRUPT SELECTION

               SETTING                              SW1/3

  IRQ2 (IBM PC/XT) or IRQ9 (IBM AT)                   On

            IRQ3 or IRQ4                             Off

                           SUPPORTED COMMAND SET

                             Basic AT Commands

  AT, ‘+++’, ‘Comma’, A/

  A, B, D, E, F, H, L, M, O, Q, S, V, X, Y, Z

  &D, &G, &L, &P, &T

                                S Registers

  S0, S1, S2, S3, S4, S5, S6, S7, S8, S9, S10, S11, S12, S14, S16, S18,
  S20, S22, S23, S27

  Note: See MHI Help file for full command documentation.

                          BIT-MAPPED REGISTER S21

  Format                 AT [cmds] S21=n [cmds]

  Default:               0

  Range:                 0-184

  Unit:                  Bit-mapped

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

    Bit       Value                          Function

   2 - 0            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 S22

  Format                  AT [cmds] S22=n [cmds]

  Default:                118

  Range:                  0-255

  Unit:                   Bit-mapped

  Description:            Controls speaker volume and controls, dial
                          mode, call progress, connect message, and pulse
                          dial make/break ratio.

    Bit        Value                         Function

   1, 0              00   Low volume

                     01   Low level volume

                     10   Medium level volume

                    11    High level volume

   3, 2              00   Speaker off

                     01   Speaker off on carrier

                     10   Speaker always on

                    11    Speaker on during handshake

     4                0   Blind dial

                     1    Wait for dial tone then proceed with the call

     5                0   Call progress disabled

                     1    Call progress enabled

     6                0   ‘CONNECT’ message only

                     1    ‘CONNECT XXXX’ message

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

                     1    33/67ms at 10pps (Europe)

                          BIT-MAPPED REGISTER S27

  Format           AT [cmds] S27=n [cmds]

  Default:         64

  Range:           0-66

  Unit:            Bit-mapped

  Description:     Selects line type, and ITU-T/Bell modes.

   Bit    Value                           Function

  1, 0       00    Not used

    2          0   Switched line

              1    Leased line

  5 - 3     000    Not used

    6          0   ITU/T mode

              1    Bell mode

                            REPORT INFORMATION

  Type:          Immediate

  Format:        AT [cmds] In [cmds]

  Description:   Displays information requested

    Command                              Function

       I0        Reports product code

       I1        Reports ROM checksum

       I2        Reports current speed, data bits, and parity