Butterfly-shaped drop cable category is

Butterfly-shaped drop cables are typically categorized into indoor, outdoor, and self-supporting variants, each designed for specific deployment environments and fiber counts.Indoor Butterfly CablesIndoor butterfly cables, often designated as GJXH or GJXFH, are lightweight and flexible, designed to run from a building entry point to the subscriber's ONT (Optical Network Terminal) ( ). Key features include:FRP (Fiber Reinforced Plastic) strength members for tensile strength.LSZH (Low Smoke Zero Halogen) sheath for fire safety.Fiber counts typically range from 1 to 4 cores for single-unit residential use, up to 12 cores for multi-tenant buildings.Bend-insensitive single-mode fibers, usually G.657.A1, allowing tight bend radii without signal loss. These cables are non-self-supporting and require conduits or other support for installation.Outdoor Butterfly CablesOutdoor variants, such as GJYXFCH or GJXFH, are designed for aerial or exposed installations ( ). They include:Steel messenger wires for self-supporting aerial spans up to 50 meters.Durable outer jackets resistant to UV, weather, and mechanical stress.Bend-insensitive fibers (G.657.A1 or A2) for routing through conduits or around corners.Suitable for connecting utility poles to buildings without additional support.Flat Ribbon and Figure-8 DesignsButterfly cables often feature a flat, ribbon-like or figure-8 shape ( ):Figure-8 design: One loop contains the fiber, the other contains a steel or FRP reinforcement, ideal for aerial drops.Flat ribbon design: Flexible and easy to tuck along walls, under carpets, or around door frames, suitable for indoor or short outdoor runs.Round or armored variants: Less common in butterfly form, used for underground or rodent-prone areas.Fiber Counts and MaterialsFiber counts: Typically 1–12 cores depending on residential or multi-dwelling applications.Strength members: FRP for non-metallic reinforcement or steel for self-supporting aerial cables.Sheath materials: LSZH for indoor safety, HDPE or flame-retardant PVC for outdoor durability.SummaryThe main types of butterfly-shaped drop cables are:Indoor FRP butterfly cables – lightweight, flexible, non-self-supporting.Outdoor self-supporting butterfly cables – include steel messenger wires for aerial deployment.Flat ribbon or figure-8 designs – optimized for installation flexibility and mechanical protection. These designs ensure reliable FTTH connectivity while accommodating different installation environments and mechanical requirements ( ).