Armored fiber optic cable and ordinary

Armored fiber optic cables include a protective metal layer for enhanced durability, while ordinary (unarmored) cables are lighter, more flexible, and suited for protected environments.

Construction Differences

Unarmored Fiber Optic Cable: Composed of the optical fiber core, a protective buffer coating, strength members (like aramid yarn), and an outer jacket made of PVC or LSZH. Lacks a metallic armor layer, making it lighter and more flexible. Easier to pull through conduits and terminate, ideal for indoor or protected installations.

Armored Fiber Optic Cable: Includes an additional protective layer, typically stainless steel, aluminum, or corrugated steel tape, wrapped around the fiber core. Features strength members such as aramid fibers or FRP rods, and an outer jacket of PE, PVC, or LSZH. Designed to resist crushing, bending, rodent damage, moisture, and harsh environmental conditions.

Performance and Durability

Both types transmit data at near-light speeds with minimal signal loss. Armored cables provide superior mechanical protection, making them suitable for outdoor, underground, or industrial environments. They can withstand high tensile stress, pressure, and rodent attacks.

Unarmored cables are sufficient for indoor, low-risk environments like data centers, office LANs, or FTTH drop cables, where physical damage is unlikely.

Cost and Installation

Unarmored cables are less expensive upfront, lighter, and easier to install, especially in tight spaces or complex cable trays. Armored cables have higher material and manufacturing costs due to the metal layers but reduce long-term maintenance and repair costs in harsh environments.

Typical Applications

Unarmored: Indoor building backbonesEnterprise LANsData center interconnectsFTTH drop cables Armored: Underground conduits and direct burialIndustrial facilities and factoriesHigh-traffic or rodent-prone areasHarsh outdoor environments, including ports and mining operations.

Key Considerations

Choose armored cables when physical protection is critical or when the cable will be exposed to environmental hazards. Choose unarmored cables for cost-effective, flexible installations in controlled, protected environments. The decision impacts long-term reliability, maintenance costs, and network resilience, so it should align with the deployment environment and expected risks.