Specifications and Models of Metal Outdoor Optical Cables

Metal outdoor optical cables are typically steel-armored, loose or central tube designs with water-blocking, UV resistance, and rodent protection for reliable outdoor deployment.Construction and DesignArmoring: These cables feature corrugated steel tape or steel strength members to provide mechanical protection, compressive strength, and rodent resistance, making them suitable for direct burial, aerial, or duct installations (Corning, Olabs, Prysmian) . Core Structure:Loose Tube Cables: Fibers are housed in 2.0 mm buffer tubes, stranded in an SZ pattern around a central strength member, isolating fibers from environmental stress and allowing mid-span access (Corning ALTOS®) .Central Tube Cables: Fibers are contained in a central buffer tube, compact and flexible, ideal for moderate fiber counts and indoor/outdoor applications (Corning MPC) . Waterproofing: Cables use dry cores with water-swellable elements or water-tight compounds to prevent moisture ingress, ensuring stable transmission in outdoor environments (Prysmian, Corning) . Outer Sheath: Jackets are typically HDPE, PE, or LSZH/HFFR, providing UV resistance, flame retardance, and low smoke emission for safety in both outdoor and indoor installations (Corning, Olabs, Prysmian) . Color Coding: Fibers and buffer tubes are color-coded according to Telcordia-Bellcore standards for easy identification during installation and maintenance (Corning) .Fiber Types and CountsSinglemode fibers: ITU-T G.652D, G.657Multimode fibers: OM1, OM2, OM3, OM4Fiber counts typically range from 2 to 24 fibers, with multi-tube designs supporting higher counts for campus or intercity backbones (Olabs, Premiumline) .Mechanical and Environmental ParametersTensile Strength: Steel armoring and strength members provide high tensile strength for long-span aerial or duct installations (Olabs, Premiumline) .Direct Burial: Armored cables can be installed directly in the ground without additional protection (Corning, Prysmian) .Environmental Resistance: Cables are UV- and microbe-resistant, rodent-proof, and suitable for extreme outdoor conditions (Corning, Prysmian) .Standards ComplianceITU-T: G.651, G.652DANSI/TIA: B.3IEC: 794 These standards ensure optical performance, mechanical reliability, and compatibility with global network infrastructure (Premiumline) .SummaryMetal outdoor optical cables are engineered for durability, environmental protection, and reliable optical performance. Key parameters include steel armoring, loose or central tube fiber arrangement, water-blocking, UV and rodent resistance, fiber type and count, and compliance with international standards. These features make them suitable for campus, city, and intercity backbone networks, supporting both aerial and direct burial installations.