The JBX42371 9-meter SC/APC to ST/UPC duplex singlemode fiber patch cable represents a professional-grade solution for telecommunications and data center installations. This connector combination is particularly valuable in network environments requiring mixed fiber optic standards, as it bridges SC/APC and ST/UPC connector types commonly found in legacy and modern systems. **Technical Excellence:** Built with G.657.A1 glass fiber meeting 9/125 singlemode specifications, this cable delivers superior performance metrics. The insertion loss of ≤0.35dB (0.15dB typical) and return loss ≥20dB exceed industry requirements, ensuring minimal signal degradation. Attenuation testing confirms performance at both 1310nm and 1550nm wavelengths, making it suitable for diverse network applications from basic connectivity to advanced DWDM systems. **Construction & Safety:** The 1.8mm outside diameter with riser-rated (OFNR) jacketing provides flexibility in installation while maintaining fire safety compliance. The robust plastic accessory construction protects the delicate fiber core, while the bright yellow jacket facilitates rapid identification and reduces installation errors in complex network environments. **Compliance & Reliability:** TAA compliance ensures suitability for government and regulated facility installations. RoHS/ELV compliance aligns with environmental standards. Testing conducted per ANSI/TIA/EIA-455-171-A-2001 standards confirms durability and performance consistency across manufacturing batches. **Flexibility & Support:** While this product is optimized at 9 meters, custom length options are available for unique installation requirements. Backed by a 90-day limited warranty and supported by free standard shipping on orders exceeding $99, this cable represents excellent value for network professionals requiring dependable fiber connectivity solutions.