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All skeleton-type optical cables

Fibre interconnection and data room reference Published 08 Feb 2025

Use this reference to prepare product questions for FD SOLUCIONES. Check interfaces, capacity, protection and installation requirements against the current product documentation.

Skeleton-type optical cables are designed with a central supporting skeleton and flexible surrounding structures, available in full-dry, tight-buffered, and hybrid loose tube variants for enhanced flexibility, protection, and installation efficiency. 1.

Standard Skeleton-

Type Optical Cable

A typical skeleton-type optical cable consists of a central skeleton and a peripheral skeleton where optical fibers are embedded in a pre-wrapped mode and continuously wrapped around the central skeleton at a preset pitch of 100–1000 mm. This design improves bending performance and flexibility, while maintaining high fiber density and compact structure. These cables often use a dry-type water-blocking structure, with fibers placed in U-shaped or SZ spiral skeleton grooves, sometimes combined with water-blocking tape or metal belts for additional protection.

They are widely used in access networks and interoffice communication lines. 2.

Full-

Dry Skeleton Tight-

Buffered Fiber Optic CableThis model replaces the traditional optical fiber ribbon with tight-sleeved loose fibers, reducing resin wrapping and facilitating construction and splicing. The full-dry skeleton design eliminates oil-based filling, improves lateral pressure resistance, moisture resistance, and allows easy splitting of individual fibers. The skeleton groove geometry is optimized to control fiber excess length, enhancing mechanical performance and fiber freedom.

This type is particularly suitable for FTTH (Fiber to the Home) networks and other FTTX applications. 3. Skeleton and Loose Tube Layer Stranded Hybrid CableThis hybrid model combines a framework skeleton with loose tube stranded layers, providing enhanced protection, positioning, and buffering.

It includes a reinforced core, protective mounting mechanisms, installation tubes, and sealing covers. The loose tube bodies inside the installation tubes allow for shock absorption and extended service life, making it ideal for environments where mechanical stress or vibration is a concern. This design is often used in broadband access networks and hybrid fiber-coaxial (HFC) systems.

4.

Variants and Commercial Options

Commercial catalogs, such as FibreFab Optronics, offer skeleton-type cables in tight-buffered, single loose tube, and multi-loose tube configurations, with options for armored, aerial, rodent-resistant, and water-blocked designs. These cables are available in singlemode (OS1/OS2) and multimode (OM1/OM2/OM3) fibers, with secondary coatings and protective sheaths tailored for indoor or outdoor applications. Custom cut-to-length services are also available for specific deployment needs.

Key Advantages of Skeleton-

Type Optical Cables

High fiber density with compact structureImproved flexibility and bending performanceEnhanced mechanical protection against lateral pressure and environmental stressDry-type water-blocking reduces maintenance and installation complexityVersatility for indoor, outdoor, aerial, and FTTH applications Skeleton-type optical cables are a versatile solution for modern communication networks, offering robust performance, ease of installation, and adaptability across various deployment scenarios.

All skeleton-type optical cables - FD SOLUCIONES OPTICAL SYSTEMS [PDF]

All skeleton-type optical cables

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Technical note

This reference is intended for preliminary fiber and communications infrastructure research. Optical interface, fiber type, port or core capacity, electrical input and output, enclosure protection, cooling, installation limits and applicable standards must be verified for the specific project.

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