Crossover Cable Pinout
Crossover Cable for 10BASE-T and 100BASE-TX
For speed of up to 100MB, 4wires Pin1, 2, 3 and 6 are in use, . TIA/EIA 568B wiring scheme is most common. Almost all commercial cables manufacturer are using TIA/EIA 568B.
To make a crossover cable just reverse the orange and green pair on one end.
| Side A Connector | Side B Connector |
| in # | Name | Description | Color | <> | Pin# | Name | Description | Color |
| 1 | TX_D1+ | Transmit + | White Green | 1 | RX_D2+ | Receive + | White Orange | |
| 2 | TX_D1- | Transmit - | Green | 2 | RX_D2- | Receive - | Orange | |
| 3 | RX_D2+ | Receive + | White Orange | 3 | TX_D1+ | Transmit + | White Green | |
| 4 | Not Used | Not Used | Blue | 4 | Not Used | Not Used | Blue | |
| 5 | Not Used | Not Used | White Blue | 5 | Not Used | Not Used | White Blue | |
| 6 | RX_D2- | Receive - | Orange | 6 | TX_D1- | Transmit - | Green | |
| 7 | Not Used | Not Used | White Brown | 7 | Not Used | Not Used | White Brown | |
| 8 | Not Used | Not Used | Brown | 8 | Not Used | Not Used | Brown |
Just have a look at the above picture, pin 1,3,5,7 are white:
Rule No, 1
1,3,5,7 are always white.
Rule no. 2
Pin 1,2,3 and 6 are in use and that is orange and green pair, between green is blue pair, and remaining is brown. I call it: OGB
To make a crossover Cable:
1- One side of cable connector is same as shown above that is TIA/EIA 568B wiring scheme.
2- On the other end just reverse the orange and green pair. Start with green instead of orange.
Tags: crossover cable, EIA TIA 568B, RJ45
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