The JBX42614 15-meter FC/APC to ST/UPC duplex singlemode fiber patch cable is engineered for professionals who demand precision and reliability in fiber optic connectivity. This cable combines advanced optical technology with practical engineering to deliver superior performance in telecommunications, data center, and enterprise network applications. **Key Technical Specifications:** This duplex cable features a 9/125 singlemode core with G.657.A1 glass fiber, delivering exceptional signal integrity across standard telecommunications wavelengths. With insertion loss measured at ≤0.35dB typical (0.15dB) and return loss exceeding 20dB, it exceeds industry requirements for high-performance networks. The cable supports both 1310 nm and 1550 nm wavelengths, with attenuation ratings of 0.25 dB/km at 1310 nm and 0.35 dB/km at 1550 nm, ensuring minimal signal degradation over distance. **Construction and Safety:** The 1.8mm outer diameter cable features riser-rated (OFNR) jacketing, meeting critical building code requirements for safe installation in vertical runs and air plenums. Available in professional yellow, it aids in network organization and identification. The cable is manufactured to stringent standards and tested in accordance with ANSI/TIA/EIA-455-171-A-2001. **Compliance and Certification:** This cable is fully TAA-compliant and RoHS/ELV certified, meeting government procurement standards and environmental regulations. It's manufactured in Taiwan, the US, or China, with available custom lengths to meet specific installation requirements. **Applications:** Ideal for connecting telecommunications equipment, fiber optic networks, and data center infrastructure where signal quality cannot be compromised. The Type A to B crossover polarity configuration is the standard for duplex patch cord installations. **Value and Support:** Included 90-day limited warranty provides peace of mind, while free standard shipping on orders over $99 offers excellent value. Ships from multiple US locations (Danville CA, Fort Worth TX, Beaufort SC) for faster delivery.