Standard Cat5 Wiring Diagram

Standard Cat5 Wiring Diagram

568-B Wiring

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

568-A Wiring

Pair #	Wire	Pin #
1-White/Blue	White/Blue	5
1-White/Blue	Blue/White	4
2-White/Green	White/Green	1
2-White/Green	Green/White	2
3-White/Orange	White/Orange	3
3-White/Orange	Orange/White	6
4-White/Brown	White/Brown	7
4-White/Brown	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.