The JBX42568 ST/APC to FC/UPC duplex singlemode fiber patch cable represents enterprise-class connectivity for critical network applications. This 85-meter cable combines high-performance optical specifications with regulatory compliance, making it an ideal choice for government agencies, telecommunications providers, and large-scale data center installations. **Key Technical Specifications:** Constructed with 9/125 singlemode fiber and G.657.A1 glass fiber technology, this duplex cable supports long-distance signal transmission with exceptional clarity. The Type A to B crossover polarity configuration is standard for duplex patch cord applications, ensuring seamless integration with existing infrastructure. Insertion loss testing confirms performance at ≤0.35dB (0.15dB typical), while return loss exceeds 20dB for optimal signal integrity. **Compliance and Certifications:** TAA (Trade Agreements Act) compliance ensures this cable meets federal procurement standards. The cable adheres to RoHS Directive 2002/95/EC and ELV requirements, making it environmentally responsible. Attenuation testing follows ANSI/TIA/EIA-455-171-A-2001 standards, guaranteeing performance consistency. **Physical Characteristics:** The distinctive yellow jacket provides visual identification in complex cable environments while maintaining OFNR (Optical Fiber Non-Conductive Riser) rating for building plenum applications. The 1.8mm outside diameter ensures compatibility with standard cable management systems and routing infrastructure. **Flexibility and Customization:** While the standard 85-meter configuration suits most enterprise deployments, custom lengths are available to accommodate specific installation requirements. This flexibility reduces waste and installation complexity. **Shipping and Support:** Qualifying orders receive free standard shipping from multiple distribution centers located strategically across the United States (Danville CA, Fort Worth TX, Beaufort SC). The 90-day limited warranty provides peace of mind for mission-critical installations. All optical accessory components feature rigorous quality control testing to ensure reliable long-term performance in demanding network environments.