Here is the pinout for the standard Cisco serial console cable (DB9 - RJ45) like this one.
Note that DCD(1) and RI(9) are not wired.
This cable is quite handy when doing µcontroller stuff. Just put a RJ45 socket on your PCB our get a breakout board from Sparkfun and you can plug and unplug at will and securely.
| DB 9 | Serial pin | Color | RJ 45 |
|---|---|---|---|
| 8 | CTS | Black | 1 |
| 6 | DSR | Brown | 2 |
| 2 | RX | Red | 3 |
| 5 | GND | Orange | 4 |
| 5 | GND | Yellow | 5 |
| 3 | TX | Green | 6 |
| 4 | DTR | Blue | 7 |
| 7 | CTS | Grey | 8 |