The JBX42721 ST/APC to LC/UPC Duplex Fiber Patch Cable represents enterprise-grade connectivity for mission-critical fiber optic networks. This 1m cable combines precision engineering with practical specifications to deliver reliable performance in professional telecommunications environments. **Technical Excellence:** This duplex singlemode fiber cable features a 9/125 micron core with G.657.A1 specifications, the latest standard for bending-insensitive singlemode fiber. The ST/APC to LC/UPC configuration provides a Type A to B crossover polarity arrangement—the most common duplex patch cord configuration for network equipment. With insertion loss typically measuring just 0.15dB and maximum 0.35dB, this cable minimizes signal degradation over your fiber network infrastructure. **Compliance & Certification:** TAA (Trade Agreements Act) compliance makes this cable suitable for federal government projects and enterprises with procurement requirements. Full RoHS/ELV certification ensures environmental responsibility without compromising performance. OFNR (Optical Fiber, Non-conductive, Riser) rated jacketing allows safe installation through building risers and plenum spaces. **Practical Design Features:** The bright yellow jacket provides excellent visibility during installation and maintenance, reducing installation errors and simplifying network documentation. At 1.8mm outer diameter, the cable integrates seamlessly into existing cable management systems. Tested to ANSI/TIA/EIA-455-171-A standards with ≥20dB return loss specifications for predictable network behavior. **Applications:** Ideal for data center builds, network equipment upgrades, telecommunications installations, fiber-to-the-home (FTTH) projects, and enterprise LAN expansions. The 1m length accommodates typical patch panel distances. **Flexibility & Support:** Custom lengths are available for unique deployment scenarios. Ships from multiple US locations (Danville CA, Fort Worth TX, Beaufort SC) with free standard shipping on orders over $99. 90-day limited warranty provides peace of mind. Whether you're managing a small network upgrade or large-scale infrastructure project, this TAA-compliant fiber patch cable delivers the performance and reliability professionals expect.