Cat-5 Ethernet Cabling

A crimp socket is viewed from the hollow/wire end, with the pins pointed up. Pin one is now the leftmost pin.
Leftmost wire is white
White-Orange Orange White-Green Blue White-Blue Green White-Brown Brown
(Pair 2 straddles pair 3, pair 3 is "reversed" to keep color scheme)
Null ethernet cable swaps the Orange and Green (1st and 2nd) pairs.

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