Up to (8) video transmitters and multiple video receivers can be "Daisy Chained” on one optical fiber. Each optical port uses wavelength division multiplexing (WDM) to both transmit and receive on one optical fiber. The data channel supports RS232, RS422 and 2 wire and 4 wire RS485. Plug-and-play design ensures ease of installation and no electrical or optical adjustments are ever required. Bi-color (Red/Green) LED indicators are provided for confirming operating status. Packaged in the exclusive Com - Fit housing, these units may be either wall or rack-mounted, or may be DIN-rail mounted by the addition of Com - Features One 10-bit digital video channel - One bi-directional data channel; or 8 contact closures - Daisy chain 8 video links on one single mode or multimode fiber Dual optical port Self-Healing Ring (SHR) configuration - Exceeds all requirements for RS-250C medium haul transmission Compatible with all NTSC, PAL, or SECAM CCTV camera systems - Voltage transient protection on all power and signal input/output lines provides unconditional protection from power surges and other voltage transient events - Automatic resettable fuses on all power lines Hot-swappable rack modules Interchangeable between stand-alone or rack mount use– Com - Fit Distances up to 30 miles (48 km) Bi-color (Red/Green) LED status indicators provide rapid indication of critical operating parameters