T568A and T568B Wiring Standards| Comms InfoZone The Difference in T568B and T568A Wiring Schemes. The pair-to-pin assignments are different in the T568B and T568A wiring schemes. This difference is easily seen with pin positioning. The green and orange pairs (2 and 3) are switched. Patch cords can be purchased that are pre-wired for T568B or 568A connectivity. RJ45 Cross Over - crsiyom Cat5 Pinout Diagram - Standard Cat 5 Wiring Diagram / Rj45 Pinout diynanoleafspot. cat5 schematic rj45 pinout cat6 cat5e f650 schema t568b volovets catatan rudi. Cat5 Wiring Diagram B — UNTPIKAPPS wwwikapps. Figure A-4 shows the RJ-45 connector wiring for the Gigabit Ethernet cable; Figure A-4 lists the pinouts.