... 2,HighQuality 3.Prompt Delivery 4.RS232, RS422,RS485 Fiber Optical TransmitterSpecification:HSGQ Video/Audio/Data Digital Opitcal Transceiver adopts the ... All the optical interfaces and electrical interfaces meet the international standards ,being used for different Video Transmitter and Receiver Features: 1 ... , water conservatncy, bank and so on 2-CH Digital Fiber Optical Transmitter and Receiver