Cat 5 connector

T-568B

Pin	Color	Pair	Descrtipion
1	white/orange	2	TxData +
2	orange	2	TxData -
3	white/green	3	RecvData +
4	blue	1	Unused
5	white/blue	1	Unused
6	green	3	RecvData -
7	white/brown	4	Unused
8	brown	4	Unused

Color Code for Cat 3

Standard 4-Pair UTP Color Codes
PAIR 1	Tip Ring	White/Blue Blue/White
PAIR 2	Tip Ring	White/Orange Orange/White
PAIR 3	Tip Ring	White/Green Green/White
PAIR 4	Tip Ring	White/Brown Brown/White