GYTC8S【Outdoor Optical Cable for Communication with Metal Strengthening Member, Loose Sheath Strand Filling, Steel-Polyethylene Bonded Sheath】The structure of the optical cable is that the single-mode or multi-mode optical fiber is sheathed with a high-modulus plastic and filled with a waterproof compound. In the loose tube, the center of the cable core is a metal strength member. For some optical cables with a certain number of cores, the metal center strength member is extruded with a layer of polyethylene. The loose tube (and filling rope) is twisted around the central strength member into a compact and round cable core, the gap in the cable core is filled with water-blocking compound, and the outer steel-polyethylene bonding sheath is extruded, and the steel strand sling is added at the same time. into a cable.