04/11/2025
This illustration shows the T568A and T568B wiring standards used for Ethernet cables (RJ45 connectors). Both standards define the pinout order of the eight wires inside a twisted-pair cable, ensuring proper network connectivity. The main difference lies in the arrangement of the green and orange pairs: T568A places the green pair on pins 1 and 2, while T568B places the orange pair there. Functionally, both work the same for straight-through cables if both ends use the same standard, but T568B is more commonly used in the U.S. for network installations.
