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# UNIDENTIFIED
2400BU 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.21, V.22, V.22bis
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Function | Label | Function | Label |
|------------------------------------------------------------|
| Line in | CN1 | Line out | CN2 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| SERIAL PORT ADDRESS |
|------------------------------------------------------------|
| Setting | SW1/1 | SW1/2 |
|--------------------+-------------------+-------------------|
| COM1 (3F8h) | On | On |
|--------------------+-------------------+-------------------|
| COM2 (2F8h) | Off | On |
|--------------------+-------------------+-------------------|
| COM3 (3E8h) | On | Off |
|--------------------+-------------------+-------------------|
| COM4 (2E8h) | Off | Off |
+------------------------------------------------------------+
+------------------------------------------------------------+
| INTERRUPT |
|------------------------------------------------------------|
| Setting | SW2/1 | SW2/2 |
|--------------------+-------------------+-------------------|
| 2 | Off | Off |
|--------------------+-------------------+-------------------|
| 3 | On | Off |
|--------------------+-------------------+-------------------|
| 4 | Off | On |
|--------------------+-------------------+-------------------|
| 5 | Off | Off |
+------------------------------------------------------------+
Proprietary AT Command Set
See document 1916 for a full command summary.