The et90110wdm2 10100 mbps ethernet single mode wdm fiber media converter kit sc 20km lets you extend a 10100 mbps ethernet connection over single mode fiber at distances up to 20 km 124 mi the converter offers wavelength division multiplexing wdm enabling bi directional communication over a single strand of fiber essentially doubling the capacity of your existing fiber infrastructure without having to install new cabling the ethernet to wdm fiber kit includes both endpoints two i