A fiber splice closure (or fiber optic splice enclosure) is a protective, ruggedized housing designed to seal, manage, and protect spliced fiber optic cables from environmental hazards like water, dust, and physical damage. Used extensively in telecommunications (FTTx, OSP), they protect delicate fiber connections in outdoor, underground, or aerial installations. They usually rated IP68, these closures are watertight, dust-proof, and corrosion-resistant to protect against moisture and extreme temperatures. They offer high tensile strength to protect against impact, bending, and stress. Inside, they feature splice trays to organize, store, and secure fiber splices, with capacities ranging from a few to hundreds of fibers. They can be installed underground (direct burial), in manholes, on poles, or in aerial configurations. Dome/Vertical Closures are often used for underground or buried applications; they look like a dome. Inline/Horizontal Closures are often used for straight-through splicing and in aerial applications. These devices are essential for maintaining stable network performance, particularly in fiber distribution networks.
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