1200/300 BAUD MODEM modem/telephone/ISDN Settings and Configuration
UNIDENTIFIED
1200/300 BAUD MODEM
Modem Type | Data (synchronous/asynchronous) |
Maximum Data Rate | 1200bps |
Data Bus | 8-bit ISA |
Data Modulation Protocol | Bell 103 & 212A, ITU-T V.22 |
Error Correction/Compression | Unidentified |
CONNECTIONS | |||
Purpose | Location | Purpose | Location |
Line-in | J1 | Line-out | J2 |
INTERRUPT SELECT - JP1 | ||||
í IRQ | Jumper A | Jumper B | Jumper C | Jumper D |
| » IRQ4 | Open | Open | Closed | Open |
í IRQ2 | Closed | Open | Open | Open |
í IRQ3 | Open | Closed | Open | Open |
í IRQ5 | Open | Open | Open | Closed |
ADDRESS SELECT | ||
í COM/Address | SW1/1 | SW1/2 |
| » COM1/3F8h | Off | Off |
í COM2/2F8h | Off | On |
í COM3/3E8h | On | Off |
í COM4/2E8h | On | On |
RECEIVED LINE SIGNAL DETECT BIT (RLSD) | |
í Setting | SW1/3 |
| » RLSD bit reset/carrier detect status written to modem status register. | Off |
í RLSD bit written to modem status register. | On |
DATA TERMINAL READY (DTR) | |
í Setting | SW1/4 |
| » DTR bit status written to the UART modem control register. | Off |
í DTR bit is ignored. | On |
PROTOCOL SELECT | |
Protocol | SW1/5 |
| » Bell 103 & 212A enabled. | Off |
í CCITT V.22 enabled. | On |
MAKE/BREAK RATIO | |
í Setting | SW1/6 |
| » 39/61 ratio (Bell standard). | Off |
í 33/67 ratio (CCITT standard). | On |
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