This easy-to-install Mini-GBIC (or SFP) module provides a simple way
to add Gigabit functionality to your Linksys switch. Gigabit fiber
is often used to connect two switches together. The technology used
depends on the distance between the two switches. The LH module uses
1310 nanometer wavelength light in multimode or single-mode fiber
optic cables, and can achieve distances up to 500 meters or
40 kilometers, depending on the fiber used.