... 1V1A1S-2 digital video optical modem can transmit video, audio, data, Ethernet, telephone, switch value signal via 1 ... We can customize multi-channel video, multi-channel audio, multi-channel data, multi-channel telephone, multi-channel switch value ... boardRJ-45Audio input & output impedance600Ω(balance / imbalance)Audio input & output voltage2VP - PAudio Bandwidth20Hz~20kHzNonlinear distortion coefficient≤ ...