The JBX42433 12-meter FC/APC to FC/UPC duplex singlemode fiber patch cable represents a premium solution for professional fiber optic networking applications. This cable is engineered to meet the stringent requirements of modern telecommunications infrastructure, data centers, and enterprise networks where signal quality and reliability are paramount. **Technical Specifications:** The cable features a 9/125 singlemode core construction utilizing G.657.A1 glass fiber, specifically designed for long-distance, high-bandwidth signal transmission. With an insertion loss of ≤0.35dB (typical 0.15dB) and return loss of ≥20dB, this cable ensures minimal signal degradation across standard operating wavelengths (1310nm and 1550nm). The duplex configuration allows simultaneous bidirectional communication, making it ideal for applications requiring full-duplex connectivity. **Construction & Durability:** The 1.8mm outer diameter cable is jacketed with OFNR (Optical Fiber Non-conductive Riser) rated material, providing excellent flame resistance while maintaining flexibility for installation in tight spaces. The Type A to B crossover polarity configuration is the industry standard for duplex patch cords, ensuring compatibility with existing infrastructure. **Compliance & Quality:** Fully TAA compliant and RoHS/ELV certified, this cable meets government procurement standards and environmental regulations. Manufacturing in Taiwan, US, and China facilities ensures consistent quality and availability. The cable is attenuation-tested per ANSI/TIA/EIA-455-171-A-2001 standards, guaranteeing performance specifications. **Applications:** Perfect for telecom equipment, optical network terminals, fiber distribution systems, and data center backbone connections. The distinctive yellow jacket aids in network documentation and cable management. **Availability & Support:** Shipped from multiple US locations (Danville CA, Fort Worth TX, Beaufort SC) with free standard shipping on orders exceeding $99. Each cable includes a 90-day limited warranty. Custom lengths are available for specialized installations.