The JBX43439 40-meter FC/APC to FC/UPC Simplex Singlemode Fiber Patch Cable represents a professional-grade solution for telecommunications, data centers, and enterprise networking applications requiring reliable optical signal transmission. This precision-engineered cable combines superior performance specifications with practical design features that make it ideal for both new installations and network upgrades. Key Technical Specifications: The cable features a 9/125 singlemode fiber core with G.657.A1 glass composition, delivering exceptional performance characteristics. Insertion loss is measured at ≤0.35dB (0.15dB typical), while return loss exceeds 20dB—specifications that far exceed industry standards for patch cable applications. The cable has been attenuation tested in accordance with ANSI/TIA/EIA-455-171-A-2001 standards at both 1310nm (0.25dB/km) and 1550nm (0.35dB/km) wavelengths, ensuring consistent performance across typical transmission windows. Durable Construction: The 1.8mm outside diameter plastic jacket is rated OFNR (Riser Rated), making it suitable for installation in building risers and plenum spaces. The distinctive yellow jacket provides high visibility for quick identification and troubleshooting in complex network installations. FC/APC connectors offer excellent return loss characteristics, while the FC/UPC termination ensures compatibility with standard telecommunications equipment. Compliance and Reliability: Fully TAA-compliant and RoHS/ELV certified per EU Directive 2002/95/EC, this cable meets rigorous federal purchasing and environmental standards. Backed by a comprehensive 90-day limited warranty, the cable is manufactured to strict quality standards with options for custom lengths available to meet specific installation requirements. Ideal Applications: Perfect for connecting telecommunications equipment, optical transceivers, and network devices in data centers, telecommunications facilities, and enterprise networks. The 40-meter length accommodates medium-distance runs while maintaining signal integrity. Ships from multiple US locations (Danville CA, Fort Worth TX, Beaufort SC) with free standard shipping on qualifying orders.