The JBX42365 3-meter SC/APC to ST/UPC duplex singlemode fiber patch cable represents a critical component for modern optical networking infrastructure. Engineered with precision-grade 9/125 micron singlemode fiber, this cable is specifically designed for long-distance, low-loss signal transmission in telecommunications and data center environments. **Technical Excellence:** This duplex patch cable features Type A to B crossover polarity configuration, the industry standard for duplex applications. The SC/APC (angle-polished connector) to ST/UPC connection minimizes reflection and back-reflection, delivering return loss ≥20dB. With measured insertion loss of ≤0.35dB (0.15dB typical at 1310nm), this cable exceeds performance expectations for mission-critical applications. **Compliance & Safety:** TAA-compliant construction ensures government procurement eligibility. The OFNR (Optical Fiber Non-conductive Riser) rating permits installation in vertical pathways and riser spaces without additional conduit protection. RoHS/ELV compliance confirms environmental responsibility, while ANSI/TIA/EIA standards certification guarantees performance consistency. **Durability & Design:** The 1.8mm outside diameter jacket provides robust protection while maintaining flexibility for tight installations. G.657.A1 glass fiber formulation enhances bend radius performance, reducing installation stress. The distinctive yellow jacket ensures easy identification in complex cable environments. **Flexible Solutions:** Available in custom lengths for specific installation requirements. Ships from multiple U.S. locations (California, Texas, South Carolina) with free standard shipping on orders exceeding $99. **Applications:** Ideal for telecommunications networks, enterprise data centers, fiber-to-the-premises installations, and any application requiring reliable singlemode signal transmission. The duplex configuration supports full-duplex communication, maximizing network efficiency.