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Explanation of Optical Cable Model Numbering Method

Optical cable model numbers are structured codes that convey the cable's type, reinforcement, structure, protective layers, and fiber characteristics.Structure of Optical Cable Model Numbers

Optical cable model numbers are alphanumeric codes that provide detailed information about the cable's design and application. Typically, a model number is divided into several parts:

  1. Classification Code: Indicates the general type and application of the cable. Common codes include:
    • GY: Outdoor (field) optical cable for communication
    • GR: Soft optical cable for communication
    • GJ: Indoor optical cable for communication rooms
    • GS: Optical cable for communication equipment
    • GH: Submarine optical cable
    • GT: Special optical cable
  2. Reinforcement Member Code: Specifies the material used to reinforce the cable:
    • No symbol: Metal reinforcing member
    • F: Non-metallic reinforcing member
    • G: Metal heavy-duty reinforcing member
    • H: Non-metallic heavy-duty reinforcing member
  3. Structural Feature Code: Describes the internal structure of the cable:
    • D: Fiber ribbon structure
    • B: Flat structure
    • T: Filled structure
    • G: Skeleton groove structure
    • Z: Self-supporting structure
  4. Protective Layer Code: Indicates the type of sheath or armor:
    • Y: Polyethylene sheath
    • V: Polyvinyl chloride sheath
    • U: Polyurethane sheath
    • A: Aluminum-polyethylene adhesive sheath
    • L: Aluminum sheath
    • G: Steel sheath
    • Q: Lead sheath
    • S: Steel-aluminum-polyethylene composite sheath
  5. Outer Sheath and Armor Layer: Often represented by numbers indicating the presence or type of armor and the outer layer material. For example, in GYGZL03:
    • GY: Outdoor optical cable
    • G: Metal heavy-duty reinforcement
    • Z: Self-supporting structure
    • L: Aluminum sheath
    • 03: Polyethylene sleeve without additional armor
  6. Fiber Count and Type: Some model numbers also include the number of fibers and fiber type, such as 864F SM, where:
    • 864F: 864 fibers
    • SM: Singlemode fiber
Practical Use

Understanding these codes allows engineers and installers to:

  • Select the correct cable for indoor, outdoor, or submarine applications
  • Determine mechanical strength, environmental protection, and installation requirements
  • Identify fiber type, count, and structural features for splicing and network design By decoding the model number, users can quickly assess the cable's suitability for specific environments, mechanical loads, and transmission performance, ensuring reliable optical network deployment.
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Technical note

This reference is intended for preliminary specialty-cable research. Compatibility, link budgets, fire performance, installation methods, test limits and applicable standards must be verified for the specific project.

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