FMCI Series Ethernet media converters are designed to transmit and receive 10/100 Mbps data over multimode or single-mode optical fiber with ST optical connectors. The electrical interface will autonegotiate to a 10 Mbps or 100 Mbps Ethernet rate without any adjustments. The optical interface operates at a 100 Mbps Ethernet rate. FMCI Series media converters are environmentally hardened to operate in extreme temperatures. LED indicators are provided for rapidly ascertaining equipment operating status and monitoring critical operating parameters. Standard size FMCI Series units can be either surface- or rack-mounted; mini units are surface-mount only. Either type can be DIN-rail mounted by the addition of an adapter plate.