It is true that one 4 wires (2 pair) are used in Ethernet. You can use the other 2 pair, but I've had nothing but problems (cross-talk, corrupt data, collisions, slow network speed) when doing this on ...
I did a search but I'm still not sure. So anyway, does gigabit over Cat5 need all 4 pairs or only 2? Also, is there any real reason to not use the extra pairs for something like a phone or even ...
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