... video converter Support 4-ch video With data, ethernet, audio, switch value for option The product adopts the international advanced uncompressed, all-digital video ... long distance and high quality transmission of 4-channel digital video, 4 two-way audio, 2 two-way switch ... value+ TelephoneRemarkV: Video, D: Data, E: Ethernet, A: audio, S: switch value, P: telephone 4-ch fiber optic video converter