FIBRE OPTIONS Model S. No. Description S734DVT-EST1 S32997A 4 Video, Duplex Data on 1 Fibre, TX, Can   S734DVT-RST1 S32998 4 Video, Duplex Data on 1 Fibre, TX, Rack   S734DVR-EST1 S38797 4 Video, Duplex Data on 1 Fibre, RX, Can   S734DVR-RST1 S33000 4 Video, Duplex Data on 1 Fibre, RX, Rack Card   Multimode fibre. The S734DV video multiplexers transmit four channels of video combined with two-way multiprotocol data and four contact closure channels over one multimode fiber. The S734DV links convert four channels of baseband composite video to digital format for transmission. Digital transmission of the video assures clean, noise-free video at the receiver.