The T568B wiring standard states that CAT5 cables should be coded as follows:

The T568B wiring standard states that CAT5 cables should be coded as follows:

A.
White/Orange,Orange,White/Green,Green,Blue,White/Blue,White/Brown,Brown.

B.
White/Orange,Orange,White/Green,Blue,White/Blue,Green,White/Brown,Brown.

C.
White/Orange,Orange,White/Green,Green,White/Blue,Blue,White/Brown,Brown.

D.
White/Orange,Orange,White/Green,Blue.