Self-supporting butterfly optical cable accessory

A self-supporting butterfly-shaped optical cable is a robust, overhead or indoor fiber optic cable designed with integrated strength members and suspension wires, enabling it to support its own weight while protecting optical fibers and facilitating easy installation.Structure and Design

The cable features a central optical communication unit flanked by two parallel non-metallic strength members (FRP) for compression resistance and fiber protection. An outer steel wire strength member or suspension wires are spirally wound around the cable, forming a self-supporting structure that eliminates the need for external support poles or pre-installed load-bearing components . The cable may include tightening devices, reversing devices, and fastening assemblies to maintain stability and reduce stress on the fibers during installation . The butterfly-shaped design allows the cable to maintain a low bending radius, resist swinging under wind loads, and prevent local tensile stress that could damage the internal fibers . Specialized bend-resistant optical fibers enhance bandwidth and network transmission performance, while the low-smoke zero-halogen (LSZH) sheath provides environmental safety and flame retardancy .

Applications

Self-supporting butterfly-shaped optical cables are widely used in Fiber-to-the-Home (FTTH) and Fiber-to-the-Building (FTTB) networks. They are suitable for:

• Overhead installations for long-distance signal transmission without the need for buried pipelines .
• Indoor environments such as vertical shafts, concealed pipes, cable trays, walls, and ceilings .
• Connecting optical network terminals (ONTs) to user access points with pre-terminated or on-site termination options .

Advantages

• Self-supporting: Can be installed without additional support structures, reducing installation complexity and cost .
• Durable and safe: Resistant to environmental stress, wind, and accidental damage, prolonging service life .
• Lightweight and practical: Simplifies handling, splicing, and maintenance .
• High performance: Specialized fibers and strength members ensure excellent tensile, compression, and bending resistance, maintaining signal integrity . In summary, the self-supporting butterfly-shaped optical cable is a versatile, reliable solution for both outdoor and indoor fiber optic network deployments, combining mechanical strength, ease of installation, and high transmission performance.