The JBX42071 LC/APC to SC/UPC duplex singlemode fiber patch cable represents enterprise-grade connectivity for modern telecommunications infrastructure. This 9-meter cable bridges equipment with differing connector standards while maintaining optical signal integrity. **Technical Specifications:** Constructed with 9/125 singlemode fiber and premium G.657.A1 glass, this cable delivers superior performance characteristics. The insertion loss specification of ≤0.35dB (0.15dB typical) ensures minimal signal degradation over the cable run, while the return loss of ≥20dB prevents detrimental signal reflections. Attenuation testing confirms performance of 0.25 dB/km at 1310nm and 0.35 dB/km at 1550nm, meeting ANSI/TIA/EIA-455-171-A-2001 standards. **Design & Construction:** The cable features a distinctive yellow jacket for quick identification in multi-cable environments. Its OFNR (Riser Rated) construction ensures compliance with building fire codes, making it suitable for vertical runs between floors. The compact 1.8mm diameter accommodates dense cable management scenarios. LC/APC (angle-polished) connectors on one end ensure low reflectance, while SC/UPC connectors provide industry-standard compatibility, creating a Type A to B crossover configuration ideal for duplex patch applications. **Compliance & Certifications:** TAA compliance makes this cable suitable for U.S. government and large enterprise procurement requirements. RoHS/ELV directive compliance satisfies environmental regulations across international markets. **Applications:** Ideal for: • Data center fiber interconnections • Campus network installations • Carrier-grade telecommunications • Equipment patch panels with mixed connector types • High-reliability signal transmission environments **Support & Warranty:** Included 90-day limited warranty covers manufacturing defects. Custom lengths are available for specialized installations. Free standard shipping applies to orders exceeding $99, with convenient fulfillment from multiple U.S. locations (Danville CA, Fort Worth TX, and Beaufort SC). **Maintenance Tip:** Keep connector caps in place when not in use to prevent dust contamination and maintain optical performance.