The GYFTA53 is a heavy-duty, double-armored fiber optic cable specifically designed for the most challenging direct burial and underground duct installations. t features double armor and double jacket constructions, providing superior mechanical protection and durability. This cable is commonly used for long-distance communication links and installations where the cable needs to be buried directly in the ground without the need for additional ducts or conduits. The fibers, 250μm, are positioned in a loose tube made of a high modulus plastic. The tubes are filled with a water-resistant filling compound. A Fiber Reinforced Plastic (FRP) locates in the center of core as a non-metallic strength member. The tubes (and fillers) are stranded around the strength member into a compact and circular core. An Aluminum Polyethylene Laminate (APL) is applied around the cable core. Then the cable core is covered with a thin polyethylene (PE) inner sheath, which is filled with jelly to protect it from water ingress.  After a corrugated steel tape armor is applied, the cable is completed with a PE outer sheath.