Cat5/10 BaseT Cabling Pinouts

Cat5/10 BaseT Cabling Pinouts

Here are two pin assignments for 8-position 8-contact (8P8C) jacks, that may be found in premises cabling systems. The only difference between the two is the pairs 2 and 3 positions. T568A and T568B SHALL NOT be used simultaneously in one installation. Note: T568A is default, T568B is optional.

T568A
	Pin #	Conductor Color Code
	1	white/green
	2	green
	3	white/orange
	4	blue
	5	white/blue
	6	orange
	7	white/brown
	8	brown

T568B
	Pin #	Conductor Color Code
	1	white/orange
	2	orange
	3	white/green
	4	blue
	5	white/blue
	6	green
	7	white/brown
	8	brown

If you want to make a crossover cable, use the T568B scheme above but as illustrated below. One end should be configured in a standard manner as on the left and the other end using the crossover configuration on the right.