User:Reverend Loki/sandbox

Pin	T568A Pair	T568B Pair	1000BASE-T Signal ID	Wire	T568A Color	T568B Color	Pins on plug face (socket is reversed)
1	3	2	DA+	tip	white/green stripe	white/orange stripe
2	3	2	DA-	ring	green solid	orange solid
3	2	3	DB+	tip	white/orange stripe	white/green stripe
4	1	1	DC+	ring	blue solid	blue solid
5	1	1	DC-	tip	white/blue stripe	white/blue stripe
6	2	3	DB-	ring	orange solid	green solid
7	4	4	DD+	tip	white/brown stripe	white/brown stripe
8	4	4	DD-	ring	brown solid	brown solid

Note that the only difference between T568A and T568B is that pairs 2 and 3 (orange and green) are swapped. Both configurations wire the pins "straight through", i.e., pins 1 through 8 on one end are connected to pins 1 through 8 on the other end. Also, the same sets of pins connect to the opposite ends that are paired in both configurations: pins 1 and 2 form a pair, as do 3 and 6, 4 and 5, and 7 and 8. One can use cables wired according to either configuration in the same installation without significant problem. The primary thing one has to be careful of, is not to accidentally wire the ends of the same cable according to different configurations (unless one intends to create an ethernet crossover cable) or, worse, swapping two lines from different pairs: problems involving crosstalk can occur, which is normally rectified by correctly twisting a pair together. These problems will be most apparent in the more stringent specifications such as Category 6.