The JBX42193 12-meter LC/APC to FC/UPC duplex singlemode fiber patch cable represents professional-grade optical connectivity designed for demanding network environments. Built with precision engineering and quality materials, this cable delivers reliable high-speed data transmission across telecommunications, data center, and enterprise infrastructure applications. **Technical Excellence:** This duplex singlemode patch cable features a 9/125 glass fiber core (G.657.A1 specification) that minimizes signal loss over extended distances. With industry-leading insertion loss performance of ≤0.35dB (typical 0.15dB) and return loss ≥20dB, the cable ensures clean signal transmission at both 1310nm and 1550nm wavelengths. The LC/APC-to-FC/UPC Type A to B crossover configuration is the most common duplex arrangement, making it ideal for existing network infrastructure compatibility. **Build Quality & Durability:** Constructed with a robust 1.8mm outside diameter and riser-rated (OFNR) yellow PVC jacket, this cable provides excellent durability and easy visual identification in complex cabling environments. The highly visible yellow color reduces installation errors and simplifies network troubleshooting. Manufactured to the highest standards with attenuation testing in accordance with ANSI/TIA/EIA-455-171-A-2001. **Compliance & Certification:** Fully TAA compliant and RoHS/ELV certified under EU directive 2002/95/EC, ensuring compatibility with government contracts and environmentally conscious procurement requirements. Ships from strategically located U.S. warehouses (Danville CA, Fort Worth TX, Beaufort SC) for rapid delivery. **Flexibility & Support:** While this product comes in 12-meter length, custom lengths are available to meet specific installation requirements. Includes 90-day limited warranty. Free standard shipping on orders exceeding $99 makes this an economical choice for bulk installations and upgrades. Ideal for telecommunications professionals, network administrators, and systems integrators seeking reliable, cost-effective singlemode fiber connectivity solutions.