... video converter Support 4-ch video With data, ethernet, audio, switch value for option The product adopts the international advanced uncompressed, all-digital video ... (MMF)/ 20~120KM (SMF) for option5, Support video intact regenerative relay6, ASIC design7, industrial working temperature range ... : Video, D: Data, E: Ethernet, A: audio, S: switch value, P: telephone 4-ch fiber optic video converter