These ducts protect cables from environmental dangers and allow network upgrades by adding more cables. Unlike direct-burial or aerial fiber, duct fiber is designed to navigate pre-installed underground or above-ground ducts—offering unmatched. Optical fiber ducts are crucial, acting as protective sheathing for delicate glass or plastic fibers. In this article, we will discuss the importance, advantages and various areas of use of fiber optic cable ducts. They are typically buried, and then the cables are air-blown, jetted, pulled or pushed into the duct. Already Know What You Are Looking For? Already have your cable in mind? Visit all our outdoor cables here.