The JBX42983 is a professional-grade 12-meter singlemode fiber patch cable designed for telecommunications, data center, and enterprise network applications. Built with precision-engineered LC/UPC connectors and a 9/125 micron core, this cable delivers exceptional performance for long-distance optical signal transmission. **Technical Performance:** This singlemode cable features G.657.A1 glass fiber with attenuation rates of 0.25 dB/km at 1310 nm and 0.35 dB/km at 1550 nm wavelengths. The measured insertion loss of ≤0.35dB (typically 0.15dB) ensures minimal signal degradation, while return loss ≥20dB prevents unwanted signal reflection. All specifications conform to ANSI/TIA/EIA-455-171-A-2001 testing standards. **Construction & Safety:** The cable features a durable 1.8mm outer diameter plastic jacket with riser-rated (OFNR) certification, meeting National Electrical Code requirements for in-building backbone installations. The straight-through simplex design provides single-strand transmission capability, ideal for unidirectional data flow applications. **Compliance & Certification:** Full TAA compliance makes this cable eligible for U.S. government and federal procurement contracts. RoHS/ELV directive compliance (EU 2002/95/EC) ensures environmental responsibility. The cable is manufactured across Taiwan, USA, and China facilities. **Practical Advantages:** The distinctive yellow jacket provides clear visual identification in complex multi-cable installations, reducing setup errors. At 12 meters, this length accommodates most rack-to-rack and floor-to-floor connections without excessive slack. Available in custom lengths for specialized applications. **Warranty & Support:** Every cable includes a 90-day limited warranty covering manufacturing defects. Free standard shipping applies to qualifying orders. Ships from strategically located U.S. warehouses in California, Texas, and South Carolina for expedited delivery. **Ideal Applications:** Perfect for data center networks, telecom infrastructure, fiber-to-the-premises (FTTP) installations, and enterprise backbone cabling where reliable, low-loss optical connectivity is essential.