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720 skeleton-type optical cable

720 skeleton-type optical cable

A 720-core skeleton-type optical cable is a high-capacity fiber optic cable where multiple fiber ribbons are arranged within a skeleton structure, providing mechanical strength, water resistance, and efficient space utilization.Structure and DesignA 720-core skeleton-type optical cable typically consists of optical fiber ribbons placed into grooves of a high-density polyethylene (HDPE) skeleton, which may include a central steel wire or stranded steel wires for added strength . Around the skeleton, water-blocking tape is applied, followed by double-sided plastic-coated aluminum tape (APL) for moisture protection. The entire assembly is then extruded with a polyethylene (PE) outer sheath, often including a ripcord for easy stripping . This design ensures mechanical durability, water resistance, and ease of installation.Fiber ArrangementThe fibers are organized in ribbons, which can be separated into smaller groups for splicing or termination. For example, some designs use 24-fiber ribbons stacked in a central tube, allowing easy separation into two 12-fiber ribbons . This ribbon-based arrangement maximizes fiber density while minimizing cable diameter, making it suitable for high-capacity backbone networks.Variants and FeaturesGel-free or dry-core: Many 720-core cables are gel-free, reducing mess and simplifying handling .Armored options: Some cables include interlocking armor or steel wire strength members for additional mechanical protection, especially in outdoor or direct-buried installations .Water-blocking: Water-blocking tapes and dry cores prevent moisture ingress, enhancing reliability in harsh environments .Jacket materials: PE or LSZH jackets are used depending on indoor or outdoor deployment, with color-coded jackets for easy identification .Applications720-core skeleton-type optical cables are designed for high-density backbone networks, including:Outside plant (OSP) installations for long-distance fiber runs .Data centers and telecom backbones requiring high fiber counts in limited duct space .Environments needing mechanical protection and water resistance, such as aerial, duct, or direct-buried installations . These cables are ideal for singlemode fibers (G.652.D or G.657.A1), supporting high-speed data transmission over long distances .SummaryIn essence, a 720-core skeleton-type optical cable combines high fiber density, mechanical strength, water-blocking protection, and flexible installation options. Its skeleton-based design allows for organized fiber placement, easy ribbon separation, and robust performance in both indoor and outdoor environments .

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