What is the difference between an "A" or "T568A" and "B" or "T568B" wired Ethernet cable?

In order to work properly, straight-through Ethernet cables must be terminated with the same pin configurations on either end. Two different wiring standards exist for wired Ethernet: T568A (A wiring) and T568B (B wiring). A and B wiring offer the same electrical properties and either standard can be used. StarTech.com uses the T568B wiring standard for all of the straight-through Ethernet cables.

Note: For more information about the differences between straight-through and crossover Ethernet cables, refer to the following FAQ: http://www.startech.com/faq/network_cables_straight_through_vs_crossover.  

Wiring Pinout Table

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