The JBX42435 20-meter FC/APC to FC/UPC duplex singlemode fiber patch cable represents the pinnacle of optical connectivity solutions for professional network environments. This precision-engineered cable is specifically designed to meet the demanding requirements of telecommunications, data centers, and enterprise networks where signal integrity and reliability are paramount. Technical Excellence At its core lies 9/125 singlemode fiber with G.657.A1 specification, providing exceptional performance characteristics. With typical insertion loss of just 0.15dB and guaranteed return loss exceeding 20dB, this cable minimizes signal degradation across the entire optical spectrum. The carefully formulated attenuation rates (0.25 dB/km at 1310nm and 0.35 dB/km at 1550nm) ensure optimal performance whether you're operating in standard or extended wavelength ranges. Connector Configuration The FC/APC to FC/UPC connector combination with Type A to B crossover polarity represents the industry-standard duplex configuration. FC connectors are renowned for their durability and low-loss characteristics, making them the preferred choice for mission-critical applications. The APC (angled physical contact) to UPC (ultra physical contact) design accommodates mixed network architectures commonly found in modern installations. Build Quality and Compliance Constructed with professional-grade OFNR riser-rated yellow jacketing and a compact 1.8mm outside diameter, this cable is engineered for easy installation in conduits and cable trays while maintaining flame-retardant safety standards. Full TAA compliance and RoHS/ELV certification ensure compatibility with government and enterprise procurement requirements. The cable meets ANSI/TIA/EIA-455-171-A standards, guaranteeing attenuation testing performed to recognized industry benchmarks. Practical Advantages At 20 meters in length, this patch cable bridges extended distances between network equipment without requiring additional splicing or connectors that could introduce signal loss. Custom length options provide flexibility for unique installation requirements. Free standard shipping on orders over $99, combined with a 90-day limited warranty, offers exceptional value and peace of mind. Applications Ideal for: fiber-to-the-premises (FTTP) installations, data center backbone connections, telecommunications network upgrades, laboratory equipment, and any application requiring single-mode fiber performance with mixed connector types.