Fiber media converters allow you to connect two different types of network infrastructure: fiber-optic and copper (Ethernet). These devices are essential when you need to bridge fiber optic cables with Ethernet cables, especially in long-distance or high-speed network setups. In this blog post. FS Fiber Media Converters: copper-to-fiber, fiber-to-fiber, Managed, Industrial & PoE models. Extend transmission to 160 km with multi-rate & multi-protocol support. 703/704 E1 and synchronous Ethernet and reverse. Both channels are transparently converted into UDP packets and back. Standards compliant for power substation installation. The 21-219 Fiber Optic IEEE C37.