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 singlemode 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 RS-232, RS-422, and RS-485 2/4W data.