Direct-buried optic cable is a common type of optic fiber communication cable used to lay optic fiber networks directly underground. Already Know What You Are Looking For? Already have your cable in mind? Visit all our outdoor cables here. Note that Recommendation ITU-T L. First, in order to demonstrate sufficient performance of an. Compared to aerial routes, buried fibers are better protected against wind, lightning, ice, falling trees, vehicle impact and vandalism. They also remove visual clutter from urban skylines. For project owners and OSP designers, the key decision is not only whether to bury fiber, but how to choose. Direct-burial fiber cable eliminates the need for continuous conduit runs and can be faster and more cost-effective on long, open runs.