The JBX42440 45-meter FC/APC to FC/UPC duplex singlemode fiber patch cable represents a sophisticated solution for high-performance optical fiber networking. This professional-grade cable combines precision engineering with robust construction to deliver dependable signal transmission in critical telecommunications infrastructure. **Technical Excellence** Featuring a 9/125 singlemode fiber core with G.657.A1 glass composition, this cable achieves exceptional optical characteristics. The insertion loss specification of ≤0.35dB (with typical performance at 0.15dB) ensures minimal signal degradation, while return loss exceeding 20dB prevents detrimental signal reflection. Attenuation rates of 0.25 dB/km at 1310nm and 0.35 dB/km at 1550nm comply with rigorous ANSI/TIA/EIA-455-171-A-2001 standards. **Connectivity and Design** The FC/APC to FC/UPC Type A to B crossover configuration represents the most common duplex patch cord polarity, facilitating seamless integration with existing network infrastructure. The 1.8mm outside diameter jacketing provides excellent bend characteristics without compromising durability, while the compact 5.0" dimensions ensure space-efficient deployment. **Compliance and Safety** TAA compliance makes this cable suitable for government and defense procurement. The riser-rated (OFNR) jacketing meets building fire safety codes, ensuring safe installation in commercial environments. RoHS/ELV directive compliance demonstrates environmental responsibility. **Practical Benefits** The 45-meter length accommodates medium to long-distance connections while maintaining optical performance. Custom length availability allows tailored solutions for specific deployment requirements. Multiple fulfillment locations (Danville, Fort Worth, and Beaufort) ensure rapid shipping with free standard delivery on orders exceeding $99. **Applications** Ideal for telecommunications networks, data center interconnects, fiber optic ring networks, and long-distance signal transmission where signal integrity and reliability are paramount. Perfect for ISP infrastructure, enterprise backbone networks, and carrier-grade telecommunications applications. Backed by a 90-day limited warranty, the JBX42440 delivers professional-grade optical connectivity with confidence.