Convert and extend a gigabit ethernet connection up to 248 miles40km over single mode lc fiber the et1000s40lc2 1000 mbps gigabit single mode fiber media converter lc 40 km enables you to extend a gigabit ethernet network over single mode fiber at distances up to 40km 25 miles a cost effective solution for connecting a gigabit ethernet 1000base t network to remote network segments over a 1000base lxsx fiber backbone the gbe to sm fiber converter supports full gigabit speeds fo