“GY” means out door fiber cable which applied in communication area, “T” means filled type, “A” means the material of the jacket; it's Aluminum Polyethylene Laminate (APL). No matter the fibers is single-mode or multimode in GYTA, they are positioned in a loose tube. So now you can know what GYFTY53 stand for? GY means outdoor, F means Non-metal enhancement, T means Filled, remains are default, default means discrete, loose tube, stranded layer, No reinforcement, Not self-supporting. Metal suspension wire or No suspension wire. Y means sheath is PE 53 means. Usually, the cable model codes for fiber optic cables start with a systematic outline: “ G + Function Code + (Reinforcement Code) + Structure Code + Sheath Code + [Armor Code] [Outer Jacket Code] ” Every segment provides specific characteristics of the cable, for example, its dedicated use, the. Use GYTS (Steel Tape) for general duct and aerial spans requiring rodent resistance. Use GYTA (Aluminum Tape) for humid, long-haul pipelines requiring superior moisture sealing. At Aimit Communication, we manufacture. In fiber optic networks, armored cables like GYTS and GYTA are essential for harsh environments. Both offer durability and protection, but their structural differences impact performance, installation, and cost. This guide. GY—room (field) optical cable for communication; GR—soft optical cable for communication; GJ - optical cable in communication room (office); GS - optical cable in communication equipment; GH - submarine optical cable for communication; GT - special optical cable for communication. Its full name is "Optical Fiber Cable with a Central Tube and a Loose Tube Structure.