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Networking Fundamentals · Foundational

T568B

A TIA wiring standard for RJ45 terminations with pin order orange-white, orange, green-white, blue, blue-white, green, brown-white, brown.

Definition

T568B is the most common pinout in commercial installations in the United States. A cable with T568B on both ends is a straight-through cable, and T568A on one end and T568B on the other is a crossover.

Example

A patch cable terminated with T568B on both ends is straight-through.

Exam tip

Remember B starts with orange-white, orange; A starts with green-white, green.

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