The ComNet CNFE2MC Ethernet 2 port media converter and CNFE22MC dual 2 port are designed to transmit and receive 10/100 Mbps data over optical fiber through user selectable SFP options. These models require the ordering of sold-separately interchangeable SFP modules for fiber type, distance and connectors. The CNFE2MC transmits and receives a single channel of Ethernet data and the CNFE22MC transmits and receives two independent channels in one unit. The electrical interface will Auto- Negotiate to a 10 Mbps, or 100 Mbps Ethernet rate without any adjustments. The optical interface operates at a 100 Mbps Ethernet rate. Both are environmentally hardened to operate in extreme temperatures. LED indicators are provided for confirming equipment operating status. Packaged in the exclusive ComNet ComFit housing, the CNFE2MC and CNFE22MC units may be either wall or rack-mounted, or may be DIN-rail mounted by the addition of ComNet model DINBKT1 adaptor plate.