1-4 Channel Digital Video Optical Multiplexer Converter 2-Optical WDM 3-extra ethernet, analog, switch 4-factory price +7X24 HT OVD ... homeland security, ITS and etc.FeaturesTransports 1,2,4,8,16 channel digitized, high quality, uncompressed video, Single directional or ... or Terminal Block with Screw Clamps Video Optical Multiplexer 4 channel Digital Video Optical Multiplexer , Video Optical Converter