What is the difference between T568A and T568B wiring?

T568A and T568B are the 2 wiring patterns for 8 position RJ45 modular plug, both permitted under the TIA/EIA 568A wiring standards document. The only difference between the two patterns is that the pairs 2 (orange) and 3 (green) are interchanged.

All our cables use T568B standards.