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Cat5 color code.



This is a Cat5e cable.  You can see that there are 4 pairs of cables (8 wires).  I have them in order from pair 1 to pair 4.  This order is very important for a couple reasons.

1. Pair 1 (blue/blue white) is the 1st pair. So if you were going to hook up a phone jack, you always use pair 1 for line 1.  If you have two phone lines and you are running them over the same cable then you would use pair 2 (orange/white orange) for line 2.  You would use pair 3 for line 3 and so on.



The order that you see in the picture is not the order that you would use to make a Ethernet cable, or terminate a cable.   Check out my post on how to terminate a Ethernet (Cat5) cable.

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