TEXT View Source
# 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
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Function | Label | Function | Label |
|------------------------------------------------------------|
| Line in | CN1 | Line out | CN2 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Setting | Label | Position |
|-----------------------------------------+-------+----------|
| í DCD normal | SW1/4 | Off |
|-----------------------------------------+-------+----------|
| DCD forced high | SW1/4 | On |
|-----------------------------------------+-------+----------|
| í RJ11, RJ14, RJ41S, or RJ45 jack type | SW1/5 | Off |
|-----------------------------------------+-------+----------|
| RJ12 or RJ13 | SW1/5 | On |
+------------------------------------------------------------+
+------------------------------------------------------------+
| SERIAL PORT ADDRESS |
|------------------------------------------------------------|
| Setting | SW1/1 | SW1/2 |
|--------------------+-------------------+-------------------|
| í 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 |
|-----------------------------------+------------------------|
| í 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 | í 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 |
| | | |
| | í 1 | DCD normal |
|------+-------+---------------------------------------------|
| 6 | 0 | Not used |
|------+-------+---------------------------------------------|
| 7 | í 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 |
| | | |
| | í 10 | Medium level volume |
| | | |
| | 11 | High level volume |
|------+-------+---------------------------------------------|
| 3, 2 | 00 | Speaker off |
| | | |
| | í 01 | Speaker off on carrier |
| | | |
| | 10 | Speaker always on |
| | | |
| | 11 | Speaker on during handshake |
|------+-------+---------------------------------------------|
| 4 | 0 | Blind dial |
| | | |
| | í 1 | Wait for dial tone then proceed with the |
| | | call |
|------+-------+---------------------------------------------|
| 5 | 0 | Call progress disabled |
| | | |
| | í 1 | Call progress enabled |
|------+-------+---------------------------------------------|
| 6 | 0 | ‘CONNECT’ message only |
| | | |
| | í 1 | ‘CONNECT XXXX’ message |
|------+-------+---------------------------------------------|
| 7 | í 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 | í 0 | Switched line |
| | | |
| | 1 | Leased line |
|-------+-------+--------------------------------------------|
| 5 - 3 | 000 | Not used |
|-------+-------+--------------------------------------------|
| 6 | 0 | ITU/T mode |
| | | |
| | í 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 |
+------------------------------------------------------------+