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.< Back to IT FAQs