Black Box LMC5023C-R3 HDMCS II Fast Ethernet (100-Mbps) Managed Media Converter - 100-Mbps Copper to 100-Mbps Multimode Fiber, 1300nm, 2km

The LMC5023C-R3 carries a 100-Mbps copper segment onto multimode fibre, putting 100BASE-FX out on SC connectors at 1300 nm for a 2 km reach. That is the typical campus or between-buildings hop, where copper has run out of distance but the site is already threaded with multimode.

It is a managed converter from the HDMCS II line, powered from the interface rather than its own supply, and rated for standard 0 to +40 C operation. Made in Taiwan.