There are three common laying methods for outdoor optical cables, namely: underground pipeline laying (that is, laying optical cables in underground pipelines), direct underground laying and overhead laying (that is, laying from utility poles to utility poles in the air. Corning Optical Communications cable specification sheets are available which list the ma-ximum tensile load for various cable types. The maximum pulling tension for stranded loose tube cable is 2,700 Newtons. Depending on engineering. Reinforced outdoor cable — shielding, strength and optical performance. Cable loops location identification.