Czech optical cables are classified by type, reinforcement, structure, and protective layers, with standard models including GY, GR, GJ, GS, GH, and GT.

Classification of Czech Optical Cables

Czech fiber optic cables are generally categorized based on their application and construction:

• GY – Outdoor (field) optical cables for communication
• GR – Soft optical cables for communication
• GJ – Optical cables for communication rooms or offices
• GS – Optical cables for communication equipment
• GH – Submarine optical cables
• GT – Special optical cables for unique applications

Reinforcement and Structure Codes

Cables are further defined by their reinforcement members and structural features:

• Reinforcement:
  • No symbol – metal reinforcing member
  • F – non-metallic reinforcing member
  • G – metal heavy-duty reinforcing member
  • H – non-metallic heavy-duty reinforcing member
• Derived structure:
  • D – fiber ribbon structure
  • B – flat structure
  • T – filled structure
  • G – skeleton groove structure
  • Z – self-supporting structure

Protective Layers and Outer Sheaths

The protective layer and outer sheath determine durability and environmental resistance:

• Protective layer codes:
  • 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
• Outer sheath: Typically indicates the final protective layer and may include additional armor or environmental protection

Common Manufacturers and Catalogs

Several Czech companies produce standard and custom optical cables:

• Kabelovna Děčín – Offers singlemode and multimode fiber optic cables suitable for indoor and outdoor installations, with detailed catalogs and 3D visualizations
• OPTOKON Kable – Produces high-quality standard and flame-retardant optical cables, including project-specific designs, patch cords, and installation components
• R&M Czech – Manufactures multi-tube loose tube cables with FRLSZH or PE jacketing for indoor/outdoor use

Example Model

A typical model code like GYGZL03 can be interpreted as:

• GY – Outdoor optical cable
• G – Metal heavy-duty reinforcing member
• Z – Self-supporting structure
• L – Aluminum sheath
• 03 – No armor layer, polyethylene sleeve This coding system allows engineers to quickly identify the application, mechanical strength, structure, and protective features of the cable.

Summary

Czech optical cables are systematically classified by application, reinforcement, structure, and protective layers, with standard models such as GY, GR, GJ, GS, GH, and GT. Manufacturers like Kabelovna Děčín, OPTOKON, and R&M Czech provide comprehensive catalogs and custom solutions for both indoor and outdoor installations, ensuring compatibility with a wide range of telecommunications and data network projects .