To make a “Crossover” cable you change the pinout connections on one end of the cable. If you do it on both ends of the cable you have crossed-over the crossover and now have a straight-through cable.
Pins 1 & 2 from one end are connected to pins 3 & 6 on the other end, and pins 3 & 6 from the first end are connected to pins 1 & 2 on the other end. Pins 4 & 5 and 7 & 8 don't change. The pinouts looking from the bottom of the cat5 ends (White/Orange starts on the left) are as follows:
| Standard End | Crossover End |
|---|---|
| Pin 1 White/Orange | Pin 1 White/Green |
| Pin 2 Orange | Pin 2 Green |
| Pin 3 White/Green | Pin 3 White/Orange |
| Pin 4 Blue | Pin 4 Blue |
| Pin 5 White/Blue | Pin 5 White/Blue |
| Pin 6 Green | Pin 6 Orange |
| Pin 7 White/Brown | Pin 7 White/Brown |
| Pin 8 Brown | Pin 8 Brown |