To minimize packet loss, the wiring has to be aligned exactly according to the standard.
The ordinary alignment is called 568A and 568B. It was established by TIA(Telecommunications Industry Association)/EIA(Electronic Industries Alliance).
Cable alignment 568A and 568B are below.

Pin	T568A Color	T568B Color	Pins on patch cord
1	green/white stripe	orange/white stripe
2	green solid	orange solid
3	orange/white stripe	green/white stripe
4	blue solid	blue solid
5	blue/white stripe	blue/white stripe
6	orange solid	green solid
7	brown/white stripe	brown/white stripe
8	brown solid	brown solid

If both end patches are assembled as T568B, the cable can be used for ordinary LAN cable for CAT5, CAT5e, CAT6.

In case of a crossover cable, one of patch cords shall be a type of T568A, another one shall be a type of T568B. Nowadays most ethernet adaptors support to recognize the type of connector between T568A and T568B.

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