The JBX42564 represents a professional-grade solution for fiber optic signal transmission in demanding network environments. This 65-meter duplex singlemode patch cable combines precision engineering with stringent quality standards to meet the requirements of modern telecommunications infrastructure. **Technical Excellence** Featuring a 9/125 singlemode core with G.657.A1 specification glass fiber, this cable delivers superior performance characteristics. The ST/APC to FC/UPC configuration provides Type A to B crossover polarity, the industry standard for duplex patch cord applications. Tested in accordance with ANSI/TIA/EIA-455-171-A-2001 standards, the cable achieves exceptional insertion loss performance of ≤0.35dB (0.15dB typical) and return loss ≥20dB, ensuring signal fidelity critical for long-distance transmission. **Build Quality and Compliance** The 1.8mm outside diameter cable features OFNR (riser-rated) yellow jacketing that exceeds fire safety requirements while providing excellent visibility in complex cable management installations. TAA compliance and RoHS/ELV certification (EU directive 2002/95/EC) qualify this cable for government procurement and environmentally conscious deployments. The construction accommodates both standard 65-meter specification and custom lengths for specialized applications. **Applications and Use Cases** Ideal for data centers, telecommunications facilities, and enterprise network infrastructure, this patch cable excels in applications requiring extended reach with minimal signal loss. The duplex configuration enables bidirectional communication, making it suitable for DWDM systems, backbone connections, and long-haul data transmission. The yellow jacket provides instant identification in high-density patching scenarios. **Warranty and Support** Backed by a 90-day limited warranty and shipped from multiple U.S. locations (Danville CA, Fort Worth TX, Beaufort SC), this cable combines reliability with convenient logistics. Free standard shipping applies to orders exceeding $99, making it economical for bulk installations. The cable's G.657.A1 bend-insensitive fiber design accommodates modern installation practices while maintaining performance integrity.