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.