The CV2000 has been Discontinued, the CBC1K36W replaces.
CV2000 is passive video balun/transceiver that allows transmission of high performance and real-time video signal over UTP cable. With mini coax-pigtail the unit can be directly equipped to camera. CV2000 can be used as either transmitter or receiver, it receives one channel video signal and sends one channel out without power supply.
Single Channel Video Balun, Passive Twisted Pair Transceiver