The JBX42559 40-meter ST/APC to FC/UPC duplex singlemode fiber patch cable represents premium connectivity for professional fiber optic networks. Designed for applications requiring extended cable runs without signal degradation, this cable is engineered to meet the strictest industry standards and compliance requirements. Technical Specifications: This duplex patch cable features 9/125 singlemode glass fiber (G.657.A1 grade) with an outer diameter of 1.8mm, enabling flexible installation in tight spaces. The cable operates at both 1310nm and 1550nm wavelengths, with attenuation of 0.25dB/km at 1310nm and 0.35dB/km at 1550nm—well within professional networking standards. With insertion loss of ≤0.35dB (0.15dB typical) and return loss of ≥20dB, this cable delivers exceptional signal integrity for sensitive communications. Connector Configuration: The ST/APC to FC/UPC connector pairing provides crossover Type A to B polarity, the most common configuration for duplex patch cord applications. ST/APC (angled physical contact) connectors on one end mate with FC/UPC (ultra-polished connector) on the other, ensuring optimal signal transfer while accommodating different network equipment. Compliance & Safety: TAA compliant for government and enterprise procurement, this cable meets RoHS and ELV directives (EU directive 2002/95/EC). The riser-rated (OFNR) jacketing ensures fire safety compliance in building installations, making it suitable for in-wall deployment. Applications & Use Cases: Ideal for data center interconnections, telecommunications facilities, long-distance LAN runs, and enterprise network backbone installations. The 40-meter length eliminates the need for intermediate splicing, reducing signal loss and maintenance points. Quality Assurance: Each cable is attenuation-tested in accordance with ANSI/TIA/EIA-455-171-A-2001 standards and backed by a 90-day limited warranty. Custom lengths are available for specialized installations. Manufactured in Taiwan, United States, or China with quality control standards consistent across all production facilities. Shipping & Availability: Ships from multiple U.S. locations (Danville CA, Fort Worth TX, Beaufort SC) with free standard shipping on orders over $99, ensuring rapid delivery and low-cost logistics for bulk installations.