The JBX42079 40-meter LC/APC to SC/UPC duplex singlemode fiber patch cable represents a premium solution for professional fiber optic networking infrastructure. Engineered for telecommunications, data center, and enterprise network applications, this cable delivers exceptional performance and reliability. **Technical Specifications:** Featuring a 9/125 singlemode core with G.657.A1 grade glass fiber, this duplex cable maintains ultra-low attenuation at both 1310nm (0.25 dB/km) and 1550nm (0.35 dB/km) wavelengths. The insertion loss of ≤0.35dB (0.15dB typical) and return loss of ≥20dB ensure minimal signal degradation over longer distances. The 1.8mm outside diameter provides optimal flexibility without compromising durability. **Construction & Compliance:** The cable features a yellow OFNR (Optical Fiber Non-conductive Riser) rated jacket, making it suitable for plenum environments and vertical cable runs. TAA (Trade Agreements Act) compliant and RoHS/ELV certified, this cable meets federal procurement requirements and international environmental standards. Standards testing follows ANSI/TIA/EIA-455-171-A-2001 protocols. **Connector Configuration:** The LC/APC (Local Connector/Angled Physical Contact) to SC/UPC (Subscriber Connector/Ultra Physical Contact) configuration provides Type A to B crossover polarity—the most common duplex patch cord setup for interoperability across diverse networking equipment. **Applications:** Ideal for long-distance signal transmission in fiber-to-the-premises (FTTP), campus networks, data centers, and telecommunications closets. The 40-meter length accommodates medium-distance runs between distribution frames and wall-mounted termination points. **Custom Solutions:** Available in custom lengths to meet specific installation requirements. Ships from multiple US locations (California, Texas, South Carolina) with free standard shipping on orders over $99. Backed by a 90-day limited warranty. **Why Choose This Cable:** Combining enterprise-grade performance with TAA compliance and cost-effective pricing, this fiber patch cable eliminates the need for premium alternatives while maintaining signal integrity crucial for mission-critical networks.