Minimal
This minimum wiring will work to connect a DTE to the RJ45 cable of an Cisco 2500 Access Server.
| DB9 | RJ45 | Connector Wire Color |
| 2 | 6 | Yellow |
| 3 | 3 | Black |
| 5 | 5 | Red |
Complete
In theory, the following table provides you with a complete wiring scheme to connect a DB9 equipped DTE to an RJ45 cable of a Cisco 2500 Access Server.
| DB9 | RJ45 | Connector Wire Color |
| 1 | / | |
| 2 | 6 | Yellow |
| 3 | 3 | Black |
| 4 | 2 | Orange |
| 5 | 4 / 5* | Red / Green* |
| 6 | 7 | Brown |
| 7 | 1 | Blue |
| 8 | 8 | White |
| 9 | / | |
| *optional | ||