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I am building a PC-based security DVR. I am using Cat6 to carry the video signal (converted via balun), power, and RS-485.

Is there a standard or convention for which twisted pairs I use for which? The baluns I am using are screw terminal so I am free to use any twisted pairs I choose for the video as well as the power and RS-485.

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How much power is going down those lines? Are you following an existing guide for this? –  Doc Sep 27 '11 at 20:13
12VDC 120mA per cat6 cable –  michael Sep 27 '11 at 21:05
as for a guide. not per say. I am using commercial grade video baluns specifically meant to be used with cat5/6 cable. Its done all the time, but I haven't yet seen a wiring guide for which twisted pairs are used for power/485/video –  michael Sep 27 '11 at 21:07

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