The mfelx1 is an easy to install mini gbic sfp transceiver module that provides a simple way to add 100 base lx functionality to your linksys switch the module operates at a wavelength of 1310 nanometer and supports single mode fiber optic cabling in a typical operating environment it can achieve distances up to 10 km depending on the total attenuation in the fiber plant 100 base lx is mainly used in metro area networks man or in large campus networks needing 100 mbps connectivity betwe