The JBX42548 ST/APC to FC/UPC singlemode fiber patch cable is a professional-grade solution designed for high-performance telecommunications and data center environments. This 6-meter duplex cable delivers the reliability and performance required for mission-critical network infrastructure. Key Features and Specifications: This cable utilizes 9/125 singlemode fiber with G.657.A1 glass specifications, the industry standard for long-distance signal transmission with minimal attenuation. The insertion loss specification of ≤0.35dB ensures minimal signal degradation, with typical performance at just 0.15dB. Return loss exceeds 20dB, providing superior signal quality and reduced reflective noise. Connector Configuration: The ST/APC to FC/UPC configuration features a Type A to B crossover polarity—the most common and practical arrangement for duplex patch cord applications. This allows seamless integration with existing network infrastructure while maintaining signal integrity across different connector types. Robust Construction: Constructed with riser-rated (OFNR) jacketing, this cable meets stringent building safety codes and is suitable for installation in plenum-rated environments. The compact 1.8mm outside diameter enables efficient cable management and space-saving routing in crowded equipment racks. Compliance and Standards: Fully TAA compliant and manufactured to ANSI/TIA/EIA standards with attenuation tested per ANSI/TIA/EIA-455-171-A-2001. The cable meets RoHS and ELV directives, ensuring environmental responsibility without compromising performance. Applications: Ideal for telecommunications facilities, data centers, network upgrades, and any application requiring reliable singlemode fiber connectivity. Perfect for professionals who require tested, verified performance with documented specifications. Customization Available: While this product is available in 6-meter standard length, custom lengths are available to meet specific installation requirements. Ships with 90-day limited warranty and free standard shipping on orders exceeding $99. Attenuation Specifications: 1310 nm: 0.25 dB/km 1550 nm: 0.35 dB/km