Fiber Optic Cable Types Complete Guide: Loose Tube, Tight Buffer, Armored, Plenum

29/04/2026 Langzhi Technology


Complete guide to fiber optic cable types including loose tube, tight buffer, armored, plenum, rodent-proof, and ADSS cables. Structure, applications and selection tips.

Fiber Optic Cable Types Overview

Fiber optic cables vary significantly in construction depending on their intended environment. Key types include:

Loose Tube Cable: Fibers move freely inside buffer tubes. Water-blocking gel protects against moisture. Best for outdoor aerial and conduit installation. Terminates in splice closures.

Tight Buffer Cable: 900µm buffer coating directly over fiber. Flexible, small diameter. Ideal for indoor use and patch cable manufacturing.

Armored Cable: Metal or FRP armor layer for mechanical protection. Crush resistant, rodent-proof. For direct burial and harsh environments.

Plenum/Riser Cable: Low-smoke zero-halogen (LSZH) jacket. Fire safety rated for building vertical shafts and air handling spaces.

Rodent-Proof Cable: Steel tape or stainless steel braid armor. For areas with rodent or termite activity.

ADSS (All-Dielectric Self-Supporting): No metal components. Self-supporting between poles. Ideal for power utility communication networks.

Fiber Type Standards

G.652 (standard single-mode), G.657 (bend-insensitive for FTTH), OM1-OM5 (multimode for short-reach high-speed). Our SFP modules support all fiber types.

Conclusion

Choose cables based on installation environment: loose tube for outdoor, tight buffer for indoor, armored for direct burial, plenum for building risers. Visit Langzhi Technology for complete fiber optic solutions.



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