Armored and ordinary optical cable models

Armored optical cables provide enhanced mechanical protection and rodent resistance, while ordinary (unarmored) cables are lighter, more flexible, and suitable for protected environments.

Construction Differences

Armored Optical Cables: These cables include a protective armor layer, typically made of corrugated metallic tape, tightly wound steel wires, or dielectric fibers, placed under the outer jacket or between dual jackets for extra protection . The armor increases crush resistance, impact strength, and rodent protection, making them ideal for direct burial, outdoor, or high-risk environments. Some armored cables feature double jackets and double steel tape for maximum durability in rodent-infested or harsh conditions . Ordinary (Unarmored) Optical Cables: These consist of the optical fiber core, a protective buffer, strength members (like aramid yarn), and an outer jacket, usually PVC or LSZH . They are lighter, more flexible, and easier to install, making them suitable for indoor, conduit, or aerial pole line applications where physical threats are minimal .

Common Models and Applications

1. Singlemode Optical Fiber (OS2): Small core (~8.3 µm), long-distance transmission up to 50 km, used in data centers, enterprise networks, and FTTH .
2. Multimode Optical Fiber (OM4): Larger core (50–62.5 µm), shorter distances (550 m–2 km), used in LANs, data centers, and short-distance communications .
3. Indoor Bend-Insensitive Cables: Light, flexible, anti-bending, suitable for homes, offices, and hotels .
4. Outdoor Industrial Cables: High weather resistance, anti-aging, available in armored and non-metallic versions, suitable for urban roads, bridges, and tunnels .
5. Specialty Cables: Include heavy metal reinforcement, loose tube structures, or non-metallic cores for electromagnetic interference protection or long-distance external building connections .

Key Considerations

• Installation Environment: Armored cables are preferred for direct burial, rodent-prone areas, or harsh outdoor conditions, while unarmored cables are ideal for indoor or conduit-protected installations .
• Cost and Handling: Armored cables are heavier and more expensive, requiring more effort to install, whereas unarmored cables are lighter, easier to splice, and lower cost .
• Mechanical Protection: Armored cables provide crush, impact, and rodent resistance, whereas unarmored cables rely on conduit or protective pathways for safety . Understanding these differences and selecting the appropriate model ensures network reliability, longevity, and cost-effectiveness in both indoor and outdoor fiber optic deployments.