Video over Twisted Pair or CAT5 Cable 
Send Video Over Twisted Pair - Video Balun! VB2

VB2 :

Video Balun Transceiver is a video transmission device that provides a low cost means of sending live video over unshielded twisted pair point-to-point wiring for distances of up to 1,000 feet black & white and 600 feet color. This unit is equipped with and screw terminals and BNC cord for easy connection. Unit pricing shown is for each. You will need to order 2 for a set.