The JBX85082 40m LC/ST Duplex 9/125 Singlemode Fiber Patch Cable represents professional-grade connectivity for modern fiber optic networks. This high-performance cable is specifically designed for applications requiring reliable, long-distance signal transmission with minimal signal degradation. **Technical Excellence** Featuring a 9/125 singlemode core with G.657.A1 glass fiber composition, this cable delivers exceptional performance metrics. The insertion loss specification of ≤0.35dB (typical 0.15dB) ensures minimal signal loss, while the return loss of ≥20dB provides superior signal integrity. Attenuation ratings of 0.25 dB/km at 1310 nm and 0.35 dB/km at 1550 nm comply with ANSI/TIA/EIA-455-171-A standards, making it ideal for both short and extended-distance transmissions. **Connectivity & Compatibility** The LC/UPC to ST/UPC connector configuration with Type A to B crossover polarity is the industry standard for duplex patch cord applications. This universally compatible design ensures seamless integration with existing network infrastructure, whether you're upgrading legacy systems or building new installations. **Quality & Compliance** With an OFNR (Riser Rated) jacket and 1.8mm outer diameter, this cable provides optimal balance between flexibility and durability. RoHS/ELV compliance ensures environmental responsibility without compromising performance. The 90-day limited warranty reflects our confidence in product quality. **Practical Advantages** The distinctive yellow jacket aids visual identification in cable management, reducing troubleshooting time. The 40-meter length eliminates costly splicing while providing flexibility for complex installations. Custom length options are available for specialized requirements. **Applications** Ideal for data center interconnects, telecommunications networks, enterprise backbone infrastructure, campus area networks (CANs), and high-speed internet service provider installations. **Shipping & Support** Enjoy free standard shipping on orders exceeding $99, with quick shipment from multiple distribution centers (Danville, CA; Fort Worth, TX; Beaufort, SC).