TIA/EIA 568A & 568B Configurations

Two different pair sequences are used for terminating pairs in a Category 5, Category 5E or Category 6 cabling system.

Each pair consists of 2 conductors known as the Tip and Ring. The tip (or L+) conductor is always white and the ring (L-) conductor is coloured. Each pair of conductors is assigned a pair of pins in the modular jack according to one of the following standard sequences.

The preferred pair assignment for use in Australia is identified as 568A. Both 568A and 568B configurations utilise pin/pair assignments that provide superior transmission performance over other category 5 wiring configurations.



Preferred Configuration

Reference T568a


AT&T Configuration

Reference T568b.jpg


A datasheet describing the different configurations of our Category 5 splitters (Catalogue # P2332, P2334, P2335, P2336) is available for viewing or download.