Specs: 500 ft SMF with simple indoor routing; no conduit; standard connectors. Total project estimate: about $1,000-$1,600 including labor and basic terminations. The 72-core loose tube fiber optic cable is designed for outdoor use where the cable must endure exposure to environmental conditions. In this cable, the optical fibers are each contained in a loose plastic tube. What Is 72 Core Fiber. At the heart of these deployments lies the 72 core fiber optic cable—an essential component balancing bandwidth capacity, durability, and network scalability. The construction features the use of dry. Indoor/Outdoor Fiber Optic Cable is perfect for connecting the networks of two buildings through the use of an underground conduit, headend termination to a fiber backbone, termination of fiber rack systems, multi-floor deployment where select fibers are used at each floor, or intra-building. 72 Cores GYTA53 fiber optic cable Double Armored & Double PE Sheathed is the steel tape armored outdoor fiber optic cable and gel-filled PBT loose tubes, and wrapped around a phosphatized steel wire central strength member used for direct buried.