The JBX42675 20m FC/APC to LC/UPC Duplex Singlemode Fiber Patch Cable represents professional-grade connectivity for mission-critical telecommunications infrastructure. This precisely engineered cable combines precision connector technology with high-quality optical fiber to deliver outstanding performance in demanding network environments. Key Technical Specifications: This duplex configuration features two strands of 9/125 singlemode fiber with a G.657.A1 glass composition, optimized for minimal attenuation and maximum signal clarity. The insertion loss of ≤0.35dB (typical 0.15dB) and return loss ≥20dB exceed industry standards, ensuring signal integrity across extended distances. Performance is consistent at both 1310 nm and 1550 nm wavelengths, with attenuation rates of 0.25 dB/km and 0.35 dB/km respectively. Design and Durability: The bright yellow 1.8mm OFNR-rated jacket provides excellent visibility in cable trays and conduit systems while offering superior flame resistance and low smoke output. Type A to B crossover polarity configuration accommodates the most common duplex patch cord applications. The cable accommodates Type A to B crossover (most common for duplex patch cords). Compliance and Standards: Fully TAA compliant and RoHS/ELV certified per EU directive 2002/95/EC, making this cable suitable for government contracts and environmentally conscious enterprises. Testing conducted per ANSI/TIA/EIA-455-171-A-2001 standards ensures reliable performance metrics. Applications: Ideal for data centers, telecommunications facilities, fiber-to-the-premises (FTTP) networks, broadcast facilities, and enterprise backbone infrastructure. The 20-meter length accommodates medium-distance connections within equipment rooms and between floor-mounted network hardware. Customization and Support: Custom lengths are available for specific installation requirements. Backed by a 90-day limited warranty, with multiple U.S. distribution centers ensuring rapid delivery. Free standard shipping on orders over $99 makes this a cost-effective choice for volume installations.