High performance Fiber Link Ethernet Extenders provide 
up to 120KM of Ethernet extension over single-mode fiber.
The Model FS-1100 is ideal for campus networks, connecting
remote LANs, and facilitating the optical last-
connection to the metropolitan-area network (MAN) and beyond.  
It provides a cost effective plug-and-play solution for 
long-range 10Base-T or 100Base-TX Ethernet extensions and 
added benefit of 10/100M auto-negotiation, making it the 
perfect choice when planning future upgrades of 10Base-T 
networks. Ethernet Fiber converters are ultra-miniature 
in size and feature a shielded RJ45 Ethernet jack, SFP 
style fiber-optic connections. Built-in auto-sensing 
capabilities enable full or half-duplex Ethernet 
operation with no configuration required 
http://www.sopofiber.com