The JBX42384 SC/APC to ST/UPC duplex singlemode fiber patch cable represents professional-grade optical connectivity designed for mission-critical network environments. This 65-meter cable is engineered to deliver reliable fiber signal transmission in telecommunications, data center, enterprise networking, and telecommunication equipment installations. **Superior Optical Performance:** Built with 9/125 singlemode fiber core and G.657.A1 glass composition, this cable exceeds industry performance standards. Testing confirms insertion loss of ≤0.35dB (0.15dB typical) and return loss ≥20dB, ensuring minimal signal degradation. Attenuation specifications of 0.25 dB/km at 1310 nm and 0.35 dB/km at 1550 nm provide excellent long-distance transmission capabilities. All testing adheres to ANSI/TIA/EIA-455-171-A-2001 standards. **Robust Construction & Safety:** The cable features a protective 1.8mm diameter jacket rated OFNR (Riser), meeting fire safety requirements for in-building installations. The distinctive yellow jacket enhances cable identification in crowded server rack environments. RoHS and ELV compliance ensures environmental responsibility and meets regulatory requirements for government and enterprise contracts. **Connectivity & Compatibility:** The SC/APC to ST/UPC configuration with Type A to B crossover polarity is the industry standard for duplex patch cord applications. This setup ensures optimal performance for connecting diverse optical equipment and network components. The duplex configuration (two fiber strands) supports bidirectional communication. **Flexibility & Compliance:** TAA compliance makes this cable suitable for federal government procurement. Custom length availability accommodates specific installation requirements. The 90-day limited warranty protects your investment. **Applications:** Ideal for enterprise data centers, telecommunications facilities, educational institutions, medical facilities, and any environment requiring reliable single-mode fiber connectivity. Perfect for backbone connections, inter-building links, and equipment interconnections in professional networks. **Convenient Ordering:** Available with free standard shipping on orders exceeding $99, shipped from strategically located US warehouses ensuring fast delivery. Custom configurations available upon request.