The JBX42075 LC/APC to SC/UPC Duplex Singlemode Fiber Patch Cable represents a critical component for modern telecommunications and data center infrastructure. At 20 meters in length, this cable is specifically designed for medium-distance backbone connections, inter-rack cabling, and device-to-device fiber optic communications. **Technical Excellence:** Built with a 9/125 singlemode core and G.657.A1 grade glass fiber, this cable meets the highest industry standards for single-mode transmission. The ≤0.35dB insertion loss (0.15dB typical) ensures minimal signal degradation, while return loss of ≥20dB provides superior signal integrity. Attenuation specifications of 0.25 dB/km at 1310nm and 0.35 dB/km at 1550nm make this cable suitable for long-distance and high-speed applications. **Compliance and Safety:** TAA-compliant and RoHS/ELV certified, this cable meets stringent government and environmental standards. Tested in accordance with ANSI/TIA/EIA-455-171-A-2001, it ensures reliability in mission-critical applications. The OFNR riser-rated jacket provides fire safety and durability within building infrastructure. **Versatile Design:** The distinctive yellow jacket provides easy identification in complex network installations, while the duplex configuration supports full-duplex communication. Type A to B crossover polarity enables seamless connectivity between diverse fiber optic equipment and network architectures. **Flexibility and Value:** Available in custom lengths for specific deployment requirements, this cable adapts to various network topologies. With free standard shipping on orders over $99 and a 90-day limited warranty, it represents excellent value for network professionals and system integrators. **Applications:** Ideal for data center interconnects, telecommunications networks, enterprise LANs, and carrier-grade installations where reliability and performance are non-negotiable.