China 8 Channel Bi-Direction Video + Data/Alarm + Audio + Telephone + 100m Ethernet Optical Transceiver (ONVDT/R82V12D12A1P1E-S), Find details about China Transmitter, Receiver from 8 Channel Bi-Direction Video + Data/Alarm + Audio + Telephone + 100m Ethernet Optical Transceiver (ONVDT/R82V12D12A1P1E-S)