The JBX42375 20-meter SC/APC to ST/UPC duplex singlemode fiber patch cable represents the gold standard for professional-grade optical fiber connectivity. Designed for organizations that demand reliability, performance, and regulatory compliance, this cable excels in telecommunications infrastructure, data centers, and enterprise network environments. Technical Excellence: Built with 9/125 singlemode fiber core and G.657.A1 glass composition, this cable delivers superior signal integrity across both 1310 nm and 1550 nm wavelengths. With attenuation specifications of 0.25 dB/km at 1310 nm and 0.35 dB/km at 1550 nm, it ensures minimal signal loss over extended distances. The insertion loss of ≤0.35dB (0.15dB typical) and return loss ≥20dB meet or exceed industry standards, providing optimal performance for critical applications. Connector Configuration: The SC/APC to ST/UPC Type A to B crossover configuration enables seamless integration with existing network infrastructure while maintaining duplex transmission capabilities. This asymmetrical connector pairing is the most common configuration for duplex patch cords, ensuring compatibility across diverse equipment. Compliance & Safety: TAA-compliant construction guarantees compliance with U.S. federal procurement requirements. RoHS/ELV directive adherence ensures environmental responsibility. OFNR (Optical Fiber Non-conductive Riser) jacketing permits safe installation in vertical runs and other building applications, making it ideal for both new installations and upgrades. Practical Design: The vibrant yellow jacket provides excellent visual identification, simplifying cable management and troubleshooting. At 1.8mm outer diameter, the cable offers flexibility for routing through cable trays and conduits. Standard 90-day limited warranty and free shipping on orders over $99 add value to your investment. Customization Available: Beyond the standard 20m length, custom lengths are available to meet specific installation requirements. Ships from multiple U.S. locations (Danville CA, Fort Worth TX, Beaufort SC) ensuring quick delivery. Ideal Applications: Telecommunications infrastructure, data center interconnects, backbone networks, fiber-to-the-premises installations, and enterprise campus networks requiring certified single-mode fiber connectivity.