568-B Wiring   Pair # Wire Pin # 1 - White/Blue White/Blue 5 Blue/White 4 2 - White/Orange White/Orange 1 Orange White 2 3 - White/Green White/Green 3 Green/White 6 4 - White/Brown White/Brown 7 Brown/White 8 << 568-B Diagram

568-A Wiring   Pair # Wire Pin # 1 - White/Blue White/Blue 5 Blue/White 4 2 - White/Green White/Green 1 Green/White 2 3 - White/Orange White/Orange 3 Orange/White 6 4 - White/Brown White/Brown 7 Brown/White 8 << 568-A Diagram

Notes for wiring diagrams above:

1. For patch cables, 568-B wiring is by far, the most common method.
2. There is no difference in connectivity between 568B and 568A cables. Either wiring should work fine on any system*. (*see notes below)
3. For a straight through cable, wire both ends identical.
4. For a crossover cable, wire one end 568A and the other end 568B.
5. Do not confuse pair numbers with pin numbers. A pair number is used for reference only (eg: 10BaseT Ethernet uses pairs 2 & 3). The pin numbers indicate actual physical locations on the plug and jack.