StarTech.com 10/100 Mbps Ethernet Single Mode WDM Fiber Media Converter Kit SC 20km (ET90110WDM2) - Fibre media converter - 100Mb LAN - 10Base-T, 100Base-FX, 100Base-TX - RJ-45 / SC single-mode - up to 20 km - 1310 nm - for P/N: ETCHS2U, SVA12M2NEUA, SVA1

Convert and extend a 10/100 Mbps Ethernet connection up to 12.4 miles/20 km over a single mode SC fiber cable. The ET90110WDM2 10/100 Mbps Ethernet Single Mode WDM Fiber Media Converter Kit SC (20km) lets you extend a 10/100 Mbps Ethernet connection over single mode fiber, at distances up to 20 km (12.4 mi).
The converter offers Wavelength-Division Multiplexing (WDM), enabling bi-directional communication over a single strand of fiber, essentially doubling the capacity of your existing fiber infrastructure without having to install new cabling.
The Ethernet to WDM Fiber Kit includes both endpoints (two interchangeable modules) - a simple solution for connecting 10/100Base-T networks to remote locations using SC-terminated single mode fiber. The Ethernet to Fiber Converter also features a durable all-steel chassis, and a simple plug-and-play installation with minimal configuration required.
For added versatility, this fiber media converter supports standalone operation, or one or both sides can be installed into a 20 Slot, 2U Rackmount Chassis (ETCHS2U).

Convert and extend a 10/100 Mbps Ethernet connection up to 12.4 miles/20 km over a single mode SC fiber cable. The ET90110WDM2 10/100 Mbps Ethernet Single Mode WDM Fiber Media Converter Kit SC (20km) lets you extend a 10/100 Mbps Ethernet connection over single mode fiber, at distances up to 20 km (12.4 mi).