The JBX42600 FC/APC to ST/UPC duplex singlemode fiber patch cable represents a critical component in modern fiber optic network infrastructure. This 0.5-meter cable is engineered to meet the exacting demands of telecommunications, data centers, and enterprise networking environments where signal integrity and performance are non-negotiable. **Technical Excellence** Features a 9/125 singlemode core with G.657.A1 specification glass fiber, delivering superior performance across the 1310nm and 1550nm wavelengths commonly used in fiber networks. The cable achieves insertion loss of just 0.15dB typical (maximum 0.35dB) and return loss exceeding 20dB, ensuring minimal signal degradation over the connection. All attenuation specifications comply with ANSI/TIA/EIA-455-171-A-2001 standards. **Professional Grade Specifications** The FC/APC (Angled Physical Contact) connector on one end connects to the ST/UPC (Ultra Polish) connector on the other, configured with Type A to B crossover polarity—the standard configuration for duplex patch cord applications. The 1.8mm outside diameter plastic jacket is OFNR (Optical Fiber Nonconductive Riser) rated, meeting building code requirements for safe installation in vertical runs and plenums. **Compliance & Deployment** TAA compliant design ensures suitability for government procurement and enterprise deployments with strict compliance requirements. RoHS/ELV directive compliance confirms environmental responsibility. Manufactured in Taiwan, US, and China with quality assurance across multiple production facilities. **Practical Benefits** The distinctive bright yellow jacket facilitates rapid identification and tracing in complex network installations, reducing troubleshooting time and installation errors. Duplex configuration enables bidirectional communication on a single cable, optimizing space and reducing installation complexity. The cable supports free standard shipping on qualifying orders, and custom lengths are available to meet specific installation requirements. **Backed by Warranty** Includes 90-day limited warranty for peace of mind. Ships from multiple US locations (Danville CA, Fort Worth TX, and Beaufort SC) for rapid delivery. Ideal for telecommunications providers, data centers, enterprise IT departments, and professional network integrators requiring reliable, standards-compliant fiber connectivity solutions.