The JBX42428 FC/APC to FC/UPC duplex singlemode fiber patch cable represents a reliable solution for professional fiber optic network installations. This 6-meter cable combines industry-standard connectors with premium construction to ensure optimal signal transmission in demanding telecommunications and data center environments. **Technical Excellence**: Built with a 9/125 singlemode fiber core and G.657.A1 glass construction, this cable delivers exceptional performance characteristics. The measured insertion loss of ≤0.35dB (0.15dB typical) and return loss ≥20dB exceed industry standards, minimizing signal degradation and ensuring data integrity. Attenuation specifications of 0.25 dB/km at 1310 nm and 0.35 dB/km at 1550 nm make it suitable for both traditional and modern wavelength applications. **Connector Configuration**: The FC/APC to FC/UPC crossover configuration represents the most common duplex patch cord polarity, facilitating seamless integration with existing network infrastructure. APC (Angled Physical Contact) connectors on one end provide superior return loss, while UPC (Ultra Physical Contact) connectors on the other ensure compatibility across diverse systems. **Compliance & Standards**: TAA compliance ensures procurement eligibility for government and institutional projects. RoHS/ELV certification confirms environmental responsibility and regulatory adherence. Construction meets rigorous ANSI/TIA/EIA-455-171-A standards, guaranteeing consistent quality. **Installation Features**: The distinctive yellow jacket enables quick cable identification during installation and maintenance, reducing installation errors and troubleshooting time. The OFNR riser rating allows safe deployment in building vertical pathways. The compact 1.8mm diameter facilitates flexible routing through conduits and tight spaces without compromising performance. **Flexibility & Support**: Available in custom lengths beyond the standard 6-meter configuration, accommodating specific installation requirements. Manufactured in Taiwan, the United States, and China with fulfillment from multiple U.S. locations (California, Texas, South Carolina), ensuring rapid delivery. Ships free on orders exceeding $99. Backed by a 90-day limited warranty providing customer confidence. Ideal for telecommunications professionals, network engineers, and data center technicians requiring dependable singlemode fiber connectivity.