GCYFXTY [non-metallic reinforcing member, central bundle filled type, polyethylene sheathed outdoor optical cable for communication] The structure of the optical cable is to insert single-mode or multi-mode optical fibers into a loose tube made of high-modulus plastic and filled with waterproof compound. , and placed in the center of the cable, the aramid yarn strengthens the yarn and extrudes the polyethylene outer sheath.