Fiber optic cable may be installed indoors or outdoors using several different installation processes. Based on installation methods, outdoor fiber optic cables are categorized as follows: Underground fiber cables are generally pulled within a conduit that is buried underground, usually 1 to 2 meters deep, to reduce the possibility of being dug up. (FOA) was founded in 1995 to help develop the workforce to build the fiber optic networks to support a rapid expansion in communications and the Internet. On long runs, use proper lubricants and make sure they are compatible with the cable jacket.