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. GYFTY53 is composed of 5 parts: Then what the true meaning of each part? 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. Buried optical cable GYXTW53 structure: “GY” outdoor communication cable, “x” central bundled tube structure, “T” ointment filling, “W” steel tape longitudinally wrapped + PE polyethylene sheath with 2 parallel steel wires. Central bundled. 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; GH - submarine optical cable for communication; GT - special. Q: What on earth does GYTA53 mean? Q: GYTA53 or GYTY53 – which one should I pick? Q: What is the Chinese standard code for ADSS cable? Q: How do I quickly understand ANY GYxx code? 1. Introduction to Optical Fiber – The Foundation of Modern Communication Optical fiber, formally known as optical. Fiber optic cables form the backbone of the contemporary communication systems. However, when it comes to picking the right cable, the task is not very easy because of the codes of different kinds of cables, like GYTA, GYTS, GYXTW, GYFTY, GYUV, and the like.