[PDF] Color Codes for RJ-45 Ethernet Plug - ZetaTalk telephones. The male connector on the end of a patchcord is called a "plug" and the receptacle on the wall outlet is a "jack." In LANs, as spec'ed by 568, there are two possible pinouts, called T568A and T568B, that differ only in which color coded pairs are connected - pair 2 and 3 are reversed. Either work equally well, as long as you don't mix CO166S2 | CommScope RJ45 plug: Interface Feature, connector A Wiring T568B: Dimensions. Cable Assembly Length Range (m) 1 – 30: Cable Assembly Length Range (ft) Wiring Diagram. Click on image to enlarge. Close Modal. Electrical Specifications. dc Resistance, maximum