RocketPort Serial (25) Cable Pinout - AllPinouts
From AllPinouts
serial interface cable Use this cable to connect a RocketPort serialport card to a modem.

8 pin RJ45 (8P8C) male connector to the RocketPort card

25 pin D-SUB female connector to the modem
| Description | RJ45 | D-Sub | Dir |
|---|---|---|---|
| Request To Send | 1 | 4 | OUT |
| Data Terminal Ready | 2 | 20 | OUT |
| Ground | 3 | 7 | OUT |
| Tranceive Data | 3 | 2 | OUT |
| Receive Data | 6 | 3 | IN |
| Data Carrier Detect | 6 | 8 | IN |
| Data Set Ready | 7 | 6 | IN |
| Clear To Send | 8 | 5 | IN |