Monitoring system of communication cable in theconfiguration is commonly used in electrical yuntai,electric lens camera device,it is mainly used forremote control decoder and control center of videomatrix switching host communication between thetransmission,generally use two core blockcommunication cable RVVP,and is used to controlthe haeundae and multi-core control cable of theelectric variable lens is mostly using 6 or 10 corecable,Such as RVV6-0.2,RVV10-0.12 and so on.A4-core shielded communication cable(RVVP)or atype 3 twisted-pair UTP is used as a soundmonitoring cable.The cross-sectional area of eachcable is 0.5mm2.Since the audio signal of themonitoring head in the monitoring system istransmitted to the central control room by point-to-point wiring,with high voltage small currenttransmission,the unshielded 2-core cable can be