The Fast-Ethernet converter family EDX100 offers an economical copper to fiber optic signal conversion. Fibre optic connections allow long-haul as well as short-haul distance Ethernet-links to spread connectiv-ity into a wide area. Different optical variants are available to fit best in all scenarios. By using the single-fiber option (WDM-mode) a very cost-effective transport of Fast-Ethernet traffic can be achieved. The Ethernet bridge - media converter EDX100 has Link Fault Pass-through (LFP) functionality, which allows easy tracing of network link failures. In case of signal loss of fiber optic port, an alarm-output is triggered for external use. EDX100 can be housed in small footprint single-slot housing or 19 rack.