Serial (RS232) modem cable (DB9-DB15). Pinout and signals for building a serial (RS232) modem cable
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 |
← |