The JBX42989 40-meter LC/UPC to LC/UPC simplex singlemode fiber patch cable represents the pinnacle of reliable fiber connectivity for modern telecommunications and data center environments. This professional-grade cable combines precision engineering with rigorous quality standards to ensure flawless signal transmission in mission-critical applications. **Superior Technical Specifications** Built with a 9/125 singlemode core and G.657.A1 glass fiber, this cable is engineered for long-distance, high-bandwidth signal transmission. The insertion loss of just ≤0.35dB (0.15dB typical) and return loss of ≥20dB ensure minimal signal degradation, making it ideal for wavelength division multiplexing (WDM) and other sensitive optical applications. Attenuation specifications of 0.25 dB/km at 1310nm and 0.35 dB/km at 1550nm provide consistent performance across standard telecommunications wavelengths. **Durability and Compliance** The cable features an OFNR-rated riser jacket in distinctive yellow, providing fire safety compliance for building installations while ensuring durability in demanding environments. At 1.8mm outside diameter, it offers excellent bendability without compromising performance. TAA compliance and RoHS/ELV certification make this cable suitable for government and enterprise procurement. **Versatile Applications** Ideal for data centers, telecommunications facilities, campus networks, and long-distance point-to-point connections, this simplex configuration supports straight-through polarity for standard fiber installations. The 40-meter length eliminates the need for multiple shorter cables while maintaining signal quality. **Flexibility and Support** Custom length options are available to perfectly match your specific installation requirements. Backed by a 90-day limited warranty and manufactured with precision quality control, this cable represents a long-term investment in network reliability. Free standard shipping on orders over $99 makes this professional-grade solution even more accessible for your networking infrastructure projects.