The ComNet FDX50M2 and FDX51M2 data transceivers are interchangeable by application and provide point-to-point transmission of simplex or duplex EIA RS232/RS422 data signals over two multimode optical fibers. The transceivers are transparent to data encoding allowing for broad-range compatibility. Plug-and-play design ensures ease of installation requiring no electrical or optical adjustments. Each transceiver incorporates a bi-color (Red/Green) indicating LED for monitoring proper system operation. The FDX50 has a small footprint and is designed for surface mounting. The FDX51 can be rack or surface mounted.