StarTech.com 10/100 Mbps Ethernet to Fiber Optic Media Converter - Steel - Chassis Mount - ST Multimode - 1310nm - 2km (ET90110ST2) - fiber media converter - 10Mb LAN, 100Mb LAN

Convert and extend a 10/100 Mbps Ethernet connection up to 1.2 miles/2km over Multi Mode ST fiber. The ET90110ST2 10/100 Mbps Multimode Fiber Media Converter (ST, 2 km) lets you extend a Fast Ethernet network (10/100 Mbps) over multimode fiber, at distances of up to 2 km (1.2 miles).
A cost-effective solution for connecting a 10/100 Mbps Ethernet (10/100Base-T) network to remote network segments over a 100Base-FX fiber backbone. Designed to offer a durable and convenient Ethernet to fiber solution, the Ethernet to ST Fiber converter features an 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 installation into the 20 Slot, 2U Rackmount Chassis (ETCHS2U).