Fiber Optic Drop Cable Specifications

Fiber optic drop cables are typically low-fiber-count cables (1–4 fibers) designed for indoor or outdoor FTTH applications, with variations including indoor FRP or steel-reinforced, outdoor self-supporting, flat, and figure-8 aerial types.Common Types and StructuresIndoor Drop Cables: These are lightweight, flexible, and designed for routing inside buildings. They often use FRP (Fiber Reinforced Plastic) or steel wire reinforcement, a butterfly-shaped flat structure, and a low-smoke, zero-halogen (LSZH) sheath. Typical models include GJXFH, GJXH, and GJXKH, with 1–4 fibers, suitable for residential or office FTTH installations . Outdoor Self-Supporting Drop Cables: Designed for aerial deployment, these cables are figure-8 or circular in shape, with the fiber unit in the center, reinforced with metallic steel wire or FRP, and often include an additional steel wire for self-support. They are UV-resistant, water-blocked, and durable for long-term outdoor exposure. Common models include GJYXCH, GJYXFCH, and GJYXKCH . Flat Drop Cables: These have a flat polyethylene (PE) sheath with a loose tube containing the optical fiber and two FRP reinforcements for tensile and compression resistance. They can support up to 12 cores and are suitable for both indoor and outdoor applications where flexibility and mechanical protection are needed . Figure-8 Aerial Drop Cables: Self-supporting cables with a central fiber core and a steel messenger wire, designed for economical aerial installation. They are ideal for outdoor FTTH networks and can withstand environmental stress such as wind and UV exposure .Key SpecificationsFiber Count: Typically 1–4 fibers for standard FTTH, up to 12 for specialized needs .Fiber Type: Bend-insensitive G.657.A2 fiber is standard for drop cables, allowing tight bends without signal loss .Reinforcement: FRP or steel wire for indoor cables; steel wire plus FRP for outdoor self-supporting cables .Sheath Material: LSZH for indoor safety; PE or flame-retardant PVC for outdoor durability .Installation: Indoor cables can be routed through conduits or open wiring; outdoor cables can be aerially suspended or buried in conduits .SummaryThe type of fiber optic drop cable depends on the installation environment and mechanical requirements. For indoor residential FTTH, 1–2 fiber FRP or steel-reinforced flat cables are common. For outdoor aerial deployment, figure-8 self-supporting cables with steel reinforcement are preferred. Flat drop cables offer versatility for both indoor and outdoor use, while maintaining bend resistance and mechanical protection.