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 outer sheath is Chromium. Below are the detail descriptions of each part. All are from standard YD/T 908-2020. Reinforcement Defalut (No symbol): Metal enhancement F: Non-metal enhancement N: No enhancement 3. 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. Let's take a look at the meanings of the fiber optic cable models. Ⅰ: Classification code and its meaning are: 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;. Many people are confused about the name of the fiber, what are GYTA stands for? “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. This comprehensive reference of standardized fiber optic acronyms is a resource for understanding technical shorthand across networking and telecommunications. We add new fiber optic industry acronyms daily to provide the most comprehensive reference.