This guide covers how to safeguard outdoor fiber optics across underground, aerial, direct-burial, and exposed setups. Fiber optic cables in public spaces form the backbone for the broadband supply of entire countries. This makes their protection all the more important. Yet, outdoors, they face temperature swings, moisture, UV exposure, rodents, and human interference. Protect and manage your high-density cabling with our 6" x 4" snap-on hinged cover. Easy to. Fiber optic cables, with their ability to transmit data as light signals through thin glass or plastic fibers, offer unparalleled speeds and reliability.