The JBX42613 12-meter FC/APC to ST/UPC duplex singlemode fiber patch cable represents a professional-grade solution for enterprise telecommunications infrastructure, data centers, and high-speed network deployments. This carefully engineered cable delivers exceptional performance for mission-critical applications requiring reliable signal transmission over extended distances. Advanced Technical Design: Constructed with dual 9/125 singlemode fiber strands, this cable minimizes signal loss and dispersion across both 1310nm and 1550nm wavelengths. The FC/APC (Angled Physical Contact) termination on one end and ST/UPC (Straight Physical Contact) on the other provides optimal flexibility for integrating diverse network equipment. The Type A to B crossover polarity configuration is the industry standard for duplex patch cord applications, ensuring immediate compatibility with existing infrastructure. Performance Excellence: With insertion loss specifications of ≤0.35dB and return loss exceeding 20dB, this cable maintains signal integrity across the full 12-meter length. The G.657.A1 fiber classification allows for tighter bending radii without compromising performance, simplifying installation in space-constrained environments. Whether transmitting at 1310nm or 1550nm wavelengths, the cable consistently delivers attenuation rates of 0.25-0.35 dB/km. Compliance & Durability: TAA (Trade Agreements Act) compliance qualifies this cable for federal and government procurement programs. RoHS/ELV certification ensures hazardous substance restrictions compliance. The OFNR (Optical Fiber Non-conductive Riser) rating permits installation in building risers without conduit, reducing installation complexity and costs. Practical Advantages: The distinctive yellow jacket provides immediate visual identification in complex cable management scenarios. Available in custom lengths for specialized applications. Manufactured in certified facilities across Taiwan, the United States, and China. Ships from three strategically located U.S. warehouses (California, Texas, and South Carolina) enabling rapid delivery. Orders exceeding $99 qualify for free standard shipping. Ideal Applications: Data center interconnects, telecommunications networks, medical imaging systems, financial trading floors, broadcast facilities, and any environment requiring reliable, standards-compliant singlemode fiber connectivity. The 90-day limited warranty provides confidence in equipment investment.