To minimize packet loss, the wiring have to be aligned exactly accoding to the standard.
The ordinaly alignment is called 568A and 568B. It was established by TIA(Telecomunications Industry Association)/EIA(Electronic Industries Alliance).
Cable alignment 568A and 568B are below.
| Pin | T568A Color | T568B Color | Pins on patch cord |
| 1 | white/green stripe | white/orange stripe |  |
| 2 | green solid | orange solid | |
| 3 | white/orange stripe | white/green stripe | |
| 4 | blue solid | blue solid | |
| 5 | white/blue stripe | white/blue stripe | |
| 6 | orange solid | green solid | |
| 7 | white/brown stripe | white/brown stripe | |
| 8 | brown solid | brown solid |
If the both end patch are assambled as T568B, the cable can be used for ordinary LAN cable for CAT5, CAT5e, CAT6.
In case of crossover cable, one of patch cords shall be type of T568A, another one shall be type of T568B. Nowadays most ethernet adaptors support to recognize the type of the connector between T568A and T568B.