The JBX42379 40-meter SC/APC to ST/UPC duplex singlemode fiber patch cable represents a premium solution for telecommunications and data center applications requiring high-reliability signal transmission. This professional-grade component combines superior optical performance with practical durability standards essential for modern network infrastructure. Optical Performance & Specifications: This singlemode patch cable features a 9/125 micron core with G.657.A1 glass fiber composition, delivering industry-leading optical characteristics. The SC/APC (angled) to ST/UPC (straight) connector configuration provides Type A to B crossover polarity—the most common standard for duplex patch cord applications. Testing conducted in accordance with ANSI/TIA/EIA-455-171-A-2001 standards confirms insertion loss of ≤0.35dB (typical 0.15dB) and return loss ≥20dB, ensuring minimal signal degradation. Attenuation rates of 0.25 dB/km at 1310nm and 0.35 dB/km at 1550nm meet or exceed industry benchmarks. Physical Design & Compliance: The cable features a bright yellow riser-rated (OFNR) jacket with 1.8mm outer diameter, providing both durability and easy cable identification in complex installations. The duplex configuration with two fiber strands supports bidirectional communication on a single cable run. TAA (Trade Agreements Act) compliance makes this cable eligible for government, federal, and regulated enterprise procurement programs. RoHS and ELV directive compliance ensures environmental responsibility without compromising performance. Applications & Use Cases: Perfect for telecommunications facilities, enterprise data centers, ISP backbone networks, and any installation requiring reliable singlemode fiber connectivity. The 40-meter length accommodates mid-range building backbone connections and cross-connect applications. Ordering & Support: Custom lengths available for specialized installations. Ships from Danville CA, Fort Worth TX, and Beaufort SC with free standard shipping on orders exceeding $99. Backed by a 90-day limited warranty ensuring peace of mind for your network investments.