The JBX42673 FC/APC to LC/UPC duplex singlemode fiber patch cable represents a professional-grade solution for organizations requiring reliable optical connectivity. This 12-meter cable addresses the critical need for low-loss signal transmission in modern telecommunications infrastructure. **Technical Performance** Tested to ANSI/TIA/EIA-455-171-A standards, this cable delivers consistent performance metrics: insertion loss of ≤0.35dB (typical 0.15dB) and return loss exceeding 20dB. Attenuation specifications meet demanding requirements at both 1310nm (0.25dB/km) and 1550nm (0.35dB/km) wavelengths, making it suitable for diverse network architectures including long-haul and metro applications. **Construction and Design** The cable features precision-engineered 9/125 singlemode fiber with G.657.A1 glass composition, providing excellent bend radius characteristics while maintaining signal integrity. The Type A to B crossover configuration is optimized for standard duplex patch cord applications. The bright yellow OFNR-rated jacket (1.8mm OD) offers superior durability, flame resistance, and easy visual identification in crowded patch panels. **Compliance and Certification** This product meets stringent regulatory requirements including TAA compliance for U.S. government and enterprise procurement, RoHS/ELV directive standards, and EU directive 2002/95/EC compliance. These certifications make it ideal for federal contracts and environmentally conscious organizations. **Applications** Perfect for data centers, telecommunications networks, campus installations, and high-performance computing environments where signal quality and reliability are non-negotiable. The duplex configuration enables simultaneous bidirectional communication on a single cable run. **Availability and Support** Shipped from multiple U.S. locations (Danville, CA; Fort Worth, TX; Beaufort, SC) ensuring rapid delivery. Custom lengths available for specialized requirements. 90-day limited warranty backs your investment. Free standard shipping applies to orders over $99.