The JBX42662 FC/APC to LC/UPC duplex singlemode fiber patch cable represents premium optical connectivity engineered for mission-critical network infrastructure. At 1.5 meters in length, this professional-grade cable provides the flexibility needed for both equipment interconnections and rack-to-rack installations in data centers and telecommunications facilities. **Optical Specifications & Performance:** Built with G.657.A1 grade glass fiber, this singlemode cable delivers exceptional signal clarity with a 9/125 core diameter standard. The cable achieves insertion loss of just 0.15dB typical (≤0.35dB maximum), ensuring minimal signal degradation over the connection. Return loss specifications of ≥20dB provide excellent signal reflection control, critical for maintaining data integrity in high-speed applications. Attenuation measurements comply with ANSI/TIA/EIA-455-171-A-2001 standards, tested at both 1310nm and 1550nm telecommunications windows. **Connector Technology:** The FC/APC (Angled Physical Contact) to LC/UPC (Ultra Physical Contact) configuration offers compatibility with diverse network equipment. The crossover Type A to B polarity is the most common duplex arrangement, simplifying installation and reducing compatibility issues. Both connector types feature anti-reflection and low-noise characteristics essential for telecommunications applications. **Physical Characteristics & Installation:** The cable features a compact 1.8mm outside diameter, providing space-efficient routing through cable trays and management systems. Its bright yellow jacket enhances visibility during installation and maintenance, reducing errors in complex network environments. Riser-rated (OFNR) jacketing meets building safety codes for installation in vertical runs and plenum areas where fire safety is paramount. **Compliance & Reliability:** Fully TAA compliant and RoHS/ELV certified, this cable meets stringent government procurement and environmental directives (EU directive 2002/95/EC). Manufactured in Taiwan, the US, or China with consistent quality standards, the cable includes a 90-day limited warranty. Ships free on orders over $99 from convenient US distribution centers in California, Texas, and South Carolina. **Applications:** Ideal for telecommunications networks, ISP backhaul systems, data center interconnections, broadcast facilities, and enterprise network backbones. The combination of superior optical performance and robust construction makes this cable suitable for both short-term deployments and permanent installations. Available in custom lengths for specialized requirements, providing scalable solutions for growing network infrastructure.