ET91000SM10Gigabit Ethernet Copper-to-Fiber Media Converter - SM LC - 10 km Convert and extend a Gigabit Ethernet connection up to 10 km (6.2 mi) using single-mode LC fiber cable. The STARTECH ET91000SM10 is a Gigabit Ethernet copper-to-fiber media converter designed for IT professionals and businesses requiring extended network reach. This device facilitates the conversion of a standard Gigabit Ethernet copper connection to a single-mode LC fiber optic link, enabling data transmission over distances up to