General Tips & Tricks

CAT 5 Cable Diagram Pinouts

CAT 5 TIA 568 Wiring Pinouts

Crossed cables are used to connect PCs to one other PC. Crossed cable are sometimes called Crossover, or Jumper cables. If your connection is PC to Router/Switch/Hub you MUST use a straight cable. Our preferences for straight cables is TIA/EIA 568A. The following description shows the wiring at both ends (male RJ45 connectors) of the crossed cable.

Note: The diagrams below shows crossing of all 4 pairs and allows for the use of cat3/4 cables with 100m LANs (100base-T4). Pairs 4,5 and 7,8 do not NEED to be crossed in 100base-TX wiring.

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