User:Reverend Loki/sandbox

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.