UNIDENTIFIED
2400BPS MODEM (0302AMC)
|
Card Type |
Modem (asynchronous) |
|
Chip Set |
Unidentified |
|
Maximum Data Rate |
2400bps |
|
Data Bus |
8-bit ISA |
|
Data Modulation Protocol |
Bell 103A/212A ITU-T V.22, V.22bis |
|
Error Correction/Compression |
MNP5, V.42, V.42bis |

|
CONNECTIONS | ||||||
|
Function |
Label |
Function |
Label | |||
|
Line out |
CN1 |
Line in |
CN2 | |||
|
SERIAL PORT ADDRESS | ||||
|
Setting |
JP1/A |
JP1/B |
JP1/C |
JP1/D |
|
COM1 (3F8h) |
Closed |
Open |
Closed |
Open |
|
COM2 (2F8h) |
Closed |
Open |
Open |
Closed |
|
COM3 (3E8h) |
Open |
Closed |
Closed |
Open |
|
COM4 (2E8h) |
Open |
Closed |
Open |
Closed |
|
INTERRUPT | ||||
|
Setting |
JP1/E |
JP1/F |
JP1/G |
JP1/H |
|
2 |
Open |
Open |
Open |
Closed |
|
3 |
Open |
Closed |
Open |
Open |
|
4 |
Closed |
Open |
Open |
Open |
|
5 |
Open |
Open |
Closed |
Open |
|
WAIT STATE | ||
|
Setting |
JP1/I |
JP1/J |
|
0 |
Closed |
Open |
|
1 |
Open |
Closed |
Proprietary AT Command Set
|
BIT MAPPED REGISTERS | |
|
Register |
Default |
|
S14 |
170 |
|
S21 |
0 |
|
S22 |
118 |
|
S23 |
7 |
|
S27 |
64 |
|
S28 |
0 |
|
DTMF ATTENUATION | |
|
Type: |
Configuration |
|
Format: |
AT [cmds] %Dn [cmds] |
|
Default: |
0 |
|
Range: |
1-7 |
|
Unit: |
2 dBm |
|
Description: |
Controls DTMF attenuation |
|
SECONDARY DEFAULTS | |
|
Type: |
Immediate |
|
Format: |
AT [cmds] %J [cmds] |
|
Description: |
Sets all S registers and AT commands to AT&F default except; S6=3s, range 3-255; S11=95ms, range 60-255; %L3, 6dBm; %D1, 2dBm. |
|
TEST MODES | ||
|
Format |
AT [cmds] S16=n [cmds] | |
|
Default: |
0 | |
|
Range: |
0-125 | |
|
Unit: |
Bit-mapped | |
|
Description: |
Controls loopback tests, analog, digital, remote digital, and self tests. | |
|
Bit |
Value |
Function |
|
0 |
í 01 |
Local analog loopback not in progress Local analog loopback in progress |
|
1 |
í 0 |
Not used |
|
2 |
í 01 |
Local digital loopback not in progress Local digital loopback in progress |
|
3 |
í 01 |
Modem not in remote digital loopback Remote digital loopback in progress |
|
4 |
í 01 |
Remote digital loopback not in progress Remote digital loopback in progress |
|
5 |
í 01 |
Remote digital loopback w/ self-test not in progress Remote digital loopback w/ self-test in progress |
|
6 |
í 01 |
Local analog loopback w/ self-test not in progress Local analog loopback w/ self-test in progress |
|
TRANSMIT ATTENUATION | |
|
Type: |
Configuration |
|
Format: |
AT [cmds] %Ln [cmds] |
|
Default: |
0 |
|
Range: |
1-7 |
|
Unit: |
2 dBm |
|
Description: |
Controls transmit attenuation |