The JBX89199 40-meter SC/ST duplex singlemode fiber patch cable represents a professional-grade solution for telecommunications networks, data centers, and enterprise infrastructure. Built with precision engineering, this cable features a 9/125 micrometer core utilizing G.657.A1 glass fiber technology, which provides superior bend performance while maintaining compatibility with standard G.652.D installations. Technical Excellence: With attenuation rates of 0.25 dB/km at 1310nm and 0.35 dB/km at 1550nm, this cable ensures minimal signal degradation over its 40-meter length. The low insertion loss specification (≤0.35dB, typical 0.15dB) and high return loss (≥20dB) make it ideal for critical communications where signal integrity is paramount. These specifications are independently verified against ANSI/TIA/EIA-455-171-A standards. Connector Configuration: The SC/UPC to ST/UPC connector arrangement with Type A to B crossover polarity represents the most common duplex patch cord configuration, making it immediately compatible with standard network installations. Both connector types feature UPC (Ultra Physical Contact) endfaces for optimal performance. Compliance & Quality: TAA compliance ensures government and federal agency procurement eligibility. RoHS and ELV directive adherence confirms environmental responsibility and hazardous substance restrictions. The OFNR (Optical Fiber Non-Conductive Riser) jacket rating provides essential fire safety compliance for plenum and riser installations. Physical Specifications: At 1.8mm outside diameter and weighing minimally, the cable maintains flexibility while providing durability. The 90-day limited warranty provides peace of mind for critical installations. Applications: Perfect for backbone connections, telecommunications equipment interconnects, data center patch panels, and enterprise network infrastructure requiring high-performance singlemode transmission. Custom Solutions: Available in alternative lengths for specific installation requirements. Free standard shipping on orders over $99, with multiple fulfillment centers for rapid delivery.