The ComNet FVT/FVR4012(M)(S)1 Series transmits four channels of video utilizing state of the art 10-bit digital encoding and decoding for very high quality video transmission, along with two channels of bi-directional data and one bi-directional contact closure over one single mode or multimode optical fiber. This equipment is environmentally hardened and suitable for use in unconditioned roadside or out-of plant installations. The FVT/FVR4012 is compatible with NTSC, PAL and SECAM video transmission protocols and supports bi-directional RS232, 422 and 485-2/4W data.