Direct-burial fiber optic cables can be directly buried in the ground, which eliminates the need for additional protective conduits or ducts, saving installation time and costs. But because the cable sits in soil exposed to moisture, load, rodents and excavation risk, planning and execution must be careful. This guide explains the common. 1. The methods described are intended for guideline use only, as it is impossible to cover all the various conditions that may arise during an installation. Already Know What You Are Looking For? Already have your cable in mind? Visit all our outdoor cables here. It forms a critical backbone for modern communication networks across both urban and rural environments. 101 describes characteristics, construction and test methods of optical fibre cables for buried application. 0, was redesignated as ITU-T L.