LET'S MAKE IT SIMPLE
Last updated: 8/17/2000
There are only two unique cable ends in the
preceding diagrams. They correspond to the 568A and 568B RJ-45 jacks and
are shown to the right.
Again, the wires with colored backgrounds
may have white stripes and may be denoted that way in diagrams found elsewhere. For
example, the green wire may be labeled Green-White--I don't bother. The
background color is always specified first.
Now, all you need to remember, to properly
configure the cables, are the diagrams for the two cable ends and the following
It makes no functional difference which standard
you use for a straight-thru cable. You can start a crossover
cable with either standard as long as the other end is the other standard. It
makes no functional difference which end is which. Despite what you
may have read elsewhere, a 568A patch cable will work in a network with 568B
wiring and 568B patch cable will work in a 568A network. The electrons
couldn't care less.
My preference is to use the 568A standard
for straight-thru cables and to start crossover cables with a 568A end. That
way all I have to remember is the diagram for the 568A end, that a straight-thru
cable has two of them, and that the green and orange pairs are swapped
at the other end of a crossover cable.
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