This cable should be used to connect an internal 14.4kbps Speedster modem to a computer.
 |
DB9 pin D-SUB female to the PC |
 |
DB15 pin D-SUB female to the modem |
| 9 pin | 15 pin | Direction | |
|---|---|---|---|
| Carrier Detect | 1 | 11 | ← |
| Receive Data | 2 | 13 | ← |
| Transmit Data | 3 | 12 | → |
| Data Terminal Ready | 4 | 10 | → |
| System Ground | 5 | 1+8+15 | |
| Data Set Ready | 6 | 3 | ← |
| Request to Send | 7 | 4 | → |
| Clear to Send | 8 | 5 | ← |
| Ring Indicator | 9 | 6 | ← |
Null modem (crossed) cable DB9 connectors
Null modem (crossed) cable DB9 and DB25 connectors
Null modem (crossed) cable DB25 connectors
Modem (straight) cable (DB9-DB25)
Modem (straight) cable (DB25-DB25)