StarTech.com Singlemode (SM) LC Fiber Media Converter for 1Gbe Network – 20km – Gigabit Ethernet – 1310nm – with SFP Transceiver (ET91000SM20) – Fibre media converter – 1GbE – 1000Base-LX, 1000Base-T – RJ-45 / LC single-mode – up to 20 km – 1310 nm – for