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                   

<gopher://bitreich.org/I/th99/t/E-H/52316-1.png>
   

   +------------------------------------------------------------+
   |                        CONNECTIONS                         |
   |------------------------------------------------------------|
   |        Function        |  Label   |   Function   |  Label  |
   |------------------------------------------------------------|
   | Line in                     |    CN1     | Line out | CN2  |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 USER CONFIGURABLE SETTINGS                 |
   |------------------------------------------------------------|
   |                 Setting                 | Label | Position |
   |-----------------------------------------+-------+----------|
   | i DCD normal                            | SW1/4 |   Off    |
   |-----------------------------------------+-------+----------|
   | DCD forced high                         | SW1/4 |    On    |
   |-----------------------------------------+-------+----------|
   | i RJ11, RJ14, RJ41S, or RJ45 jack type  | SW1/5 |   Off    |
   |-----------------------------------------+-------+----------|
   | RJ12 or RJ13                            | SW1/5 |    On    |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                    SERIAL PORT ADDRESS                     |
   |------------------------------------------------------------|
   |      Setting       |       SW1/1       |       SW1/2       |
   |--------------------+-------------------+-------------------|
   |   i 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           |
   |-----------------------------------+------------------------|
   |          i 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 | Not used                                    |
   |  0   |       |                                             |
   |------+-------+---------------------------------------------|
   | 4, 3 |  i 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                             |
   |      |       |                                             |
   |      |   i 1 | DCD normal                                  |
   |------+-------+---------------------------------------------|
   |  6   |     0 | Not used                                    |
   |------+-------+---------------------------------------------|
   |  7   |   i 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                            |
   |      |       |                                             |
   |      |  i 10 | Medium level volume                         |
   |      |       |                                             |
   |      |    11 | High level volume                           |
   |------+-------+---------------------------------------------|
   | 3, 2 |    00 | Speaker off                                 |
   |      |       |                                             |
   |      |  i 01 | Speaker off on carrier                      |
   |      |       |                                             |
   |      |    10 | Speaker always on                           |
   |      |       |                                             |
   |      |    11 | Speaker on during handshake                 |
   |------+-------+---------------------------------------------|
   |  4   |     0 | Blind dial                                  |
   |      |       |                                             |
   |      |   i 1 | Wait for dial tone then proceed with the    |
   |      |       | call                                        |
   |------+-------+---------------------------------------------|
   |  5   |     0 | Call progress disabled                      |
   |      |       |                                             |
   |      |   i 1 | Call progress enabled                       |
   |------+-------+---------------------------------------------|
   |  6   |     0 | 'CONNECT' message only                      |
   |      |       |                                             |
   |      |   i 1 | 'CONNECT XXXX' message                      |
   |------+-------+---------------------------------------------|
   |  7   |   i 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   |   i 0 | Switched line                              |
   |       |       |                                            |
   |       |     1 | Leased line                                |
   |-------+-------+--------------------------------------------|
   | 5 - 3 |   000 | Not used                                   |
   |-------+-------+--------------------------------------------|
   |   6   |     0 | ITU/T mode                                 |
   |       |       |                                            |
   |       |   i 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                                      |
   +------------------------------------------------------------+