The JBX42245 LC/APC to ST/UPC duplex singlemode fiber patch cable represents professional-grade connectivity for critical network infrastructure. This 3-meter cable combines proven optical performance with regulatory compliance, making it the preferred choice for telecommunications facilities, data centers, and enterprise networks. **Technical Excellence:** Built with 9/125 singlemode fiber and G.657.A1 glass composition, this duplex cable delivers superior signal quality. Attenuation specifications of 0.25 dB/km at 1310nm and 0.35 dB/km at 1550nm ensure minimal signal loss across standard telecom wavelengths. The measured insertion loss of ≤0.35dB (0.15dB typical) and return loss of ≥20dB far exceed industry standards, providing reliable performance for both voice and data transmission. **Regulatory Compliance:** TAA (Trade Agreements Act) compliant and RoHS/ELV certified per EU directive 2002/95/EC, this cable meets government procurement standards and environmental regulations. OFNR riser rating ensures safe installation in building plenum spaces while maintaining fire safety compliance. **Design & Construction:** The vibrant yellow jacket provides easy identification in cable management systems and patch panels. At 1.8mm diameter, it fits seamlessly into standard cable trays and conduits. Type A to B crossover polarity configuration is optimized for duplex applications, the most common configuration for patch cord installations. **Applications:** Ideal for connecting network switches, routers, and fiber termination equipment. Suitable for campus networks, data center interconnects, and telecommunications backbone installations requiring singlemode performance. **Flexibility & Service:** While this product comes in a fixed 3-meter length, custom lengths are available upon request to match your specific installation requirements. Free standard shipping on orders over $99 and quick availability from U.S. warehouses (Danville CA, Fort Worth TX, Beaufort SC) ensure rapid deployment. **Quality Assurance:** Attenuation tested in accordance with ANSI/TIA/EIA-455-171-A-2001 standards, with 90-day limited warranty coverage providing peace of mind for your investment.