The ET90110SM302 10/100 Mbps Single Mode Fiber Media Converter SC (30 km) lets you extend a Fast Ethernet network (10/100) over single mode fiber, at distances up to 30 km (18. 6 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, the media converter is designed to offer a durable and convenient Ethernet to fiber solution, with an all-steel chassis, and 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). Backed by a Star Tech. com 2-year warranty and free lifetime technical support. The Star Tech. com Advantage Link loss forwarding, remote monitoring of status ensures maximum up-time Provides Ethernet to Fiber conversion as a standalone device, or can be installed into the ETCHS2U 20 slot chassis for added versatility Rugged steel casing for durability in harsh environments