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 |
|
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 |
0 |
Not used |
|
4, 3 |
í 0001 10 11 |
DTR signal ignored Modem goes to command mode on low DTR Modem disconnects on low DTR; Auto-Answer is disabled. Modem is initialized on low DTR |
|
5 |
0 í 1 |
DCD forced high DCD normal |
|
6 |
0 |
Not used |
|
7 |
í 01 |
Long space disconnect function disabled 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 01 í 1011 |
Low volume Low level volume Medium level volume High level volume |
|
3, 2 |
00 í 0110 11 |
Speaker off Speaker off on carrier Speaker always on Speaker on during handshake |
|
4 |
0 í 1 |
Blind dial Wait for dial tone then proceed with the call |
|
5 |
0 í 1 |
Call progress disabled Call progress enabled |
|
6 |
0 í 1 |
CONNECT message only CONNECT XXXX message |
|
7 |
í 01 |
39/61ms at 10pps (North America) 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 01 |
Switched line Leased line |
|
5 - 3 |
000 |
Not used |
|
6 |
0 í 1 |
ITU/T mode 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 |