The JBX42620 45-meter FC/APC to ST/UPC duplex singlemode fiber patch cable represents professional-grade connectivity for demanding network environments. This cable is engineered to deliver superior optical performance while meeting stringent industry standards and compliance requirements. **Technical Excellence** Featuring 9/125 singlemode fiber with G.657.A1 glass composition, this cable provides exceptional signal integrity with low insertion loss of ≤0.35dB (typical 0.15dB) and robust return loss ≥20dB. The cable undergoes attenuation testing in accordance with ANSI/TIA/EIA-455-171-A-2001, ensuring consistency and reliability across wavelengths (0.25 dB/km @ 1310nm or 0.35 dB/km @ 1550nm). **Robust Construction** The 1.8mm outside diameter cable is encased in a durable, riser-rated (OFNR) yellow plastic jacket that provides protection against environmental factors while maintaining flexibility for installation in tight spaces. The distinctive yellow color simplifies network management and identification. **Compliance & Quality Assurance** TAA compliant for federal and government procurement requirements, this cable meets RoHS/ELV directives (EU 2002/95/EC), making it suitable for environmentally conscious organizations. The Type A to B crossover polarity configuration is the most common setting for duplex patch cord applications. **Versatile Applications** Ideal for telecommunications infrastructure, data center interconnects, LAN installations, fiber optic backbone systems, and long-distance signal transmission. The 45-meter length accommodates large-scale installations without excessive bulk. **Flexible Customization** While this model provides 45 meters of connectivity, custom lengths are available to match your specific project requirements. Ships rapidly from multiple U.S. locations (Danville, CA; Fort Worth, TX; Beaufort, SC) with free standard shipping on orders exceeding $99. **Support & Warranty** Backed by a 90-day limited warranty, this cable demonstrates manufacturer confidence in quality. Made with components from Taiwan, US, and China facilities, it represents the best value in professional fiber optic connectivity solutions.