FM-3100 series 10/100/1000M Ethernet media converter 

adopts switching technology to fulfill media conversion. 

It complies with IEEE802.3z and IEEE802.3ab standards, 

and supports two types of media network 

connections:10 /100/1000Base-T and 1000Base-SX/LX. 

It inter-converts electrical signals of 

10/100/1000Base-T twisted pairs with optical

signals of 1000Base-SX, extending the transmission

distance of a network from 100m via copper cables

to 220m (fiber size: 62.5/125μm)/550m 

(fiber size: 50/125μm) via fiber optical cables. 

It supports transmission in multi-mode dual fiber; 

single-mode dual fiber, single-mode single fiber.

http://www.sopofiber.com