Mike's PBX Cookbook

Ethernet Patch Cables

  • Straight Through - for Host to Switch (or hub) connections, a 'normal' patch cable.
  • Crossover Cable - for Host to Host direct connections (TX and RX pairs must be crossed over).
  • T568A or T568B? - it doesn't really matter, but T568B is preferred. Use the same at each end; unless you need a crossover!
  • Gigabit Cables - utilise all four pairs; therefore gigabit crossover cables must cross all four pairs.

    T568B Straight

    T568B
    12345678
    White/Orange Orange/White White/Green Blue/White White/Blue Green/White White/Brown Brown/White
    T568B
    12345678
    White/Orange Orange/White White/Green Blue/White White/Blue Green/White White/Brown Brown/White

    T568A Straight

    T568A
    12345678
    White/Green Green/White White/Orange Blue/White White/Blue Orange/White White/Brown Brown/White
    T568A
    12345678
    White/Green Green/White White/Orange Blue/White White/Blue Orange/White White/Brown Brown/White

    10/100BaseT Crossover

    T568B
    12345678
    White/Orange Orange/White White/Green Blue/White White/Blue Green/White White/Brown Brown/White
    T568A
    12345678
    White/Green Green/White White/Orange Blue/White White/Blue Orange/White White/Brown Brown/White

    Gigabit T568B Crossover

    T568B
    12345678
    White/Orange Orange/White White/Green Blue/White White/Blue Green/White White/Brown Brown/White
    Crossed
    12345678
    White/Green Green/White White/Orange White/Brown Brown/White Orange/White Blue/White White/Blue

    Gigabit T568A Crossover

    T568A
    12345678
    White/Green Green/White White/Orange Blue/White White/Blue Orange/White White/Brown Brown/White
    Crossed
    12345678
    White/Orange Orange/White White/Green White/Brown Brown/White Green/White Blue/White White/Blue
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