The fibers are positioned in a loose tube made of high modulus plastic and filled with gel. Tubes (and fillers) are stranded around the non-metallic strength member to form the cable core. An Aluminum tape(APL) is applied around the cable core, which is filled with the water-blocking compound. Then the cable core is covered with a PE inner jacket. After the corrugated steel tape(CST) is longitudinally armored over the inner jacket, the cable is completed with a PE outer jacket.