The JBX42734 15-meter ST/APC to LC/UPC duplex singlemode fiber patch cable is engineered for mission-critical telecommunications, data center, and network infrastructure applications. This professional-grade cable delivers exceptional performance with minimal signal loss and maximum reliability. **Technical Excellence:** Featuring a 9/125 singlemode fiber core manufactured to G.657.A1 specifications, this cable provides superior optical performance. The low insertion loss rating of ≤0.35dB (typical 0.15dB) ensures signal integrity over extended distances, while the return loss specification of ≥20dB minimizes reflective interference. Attenuation testing confirms performance at both 1310 nm and 1550 nm wavelengths, making it suitable for diverse networking standards. **Connector Configuration:** The ST/APC to LC/UPC configuration with Type A to B crossover polarity represents the most common duplex patch cord arrangement. The APC (Angled Physical Contact) ferrules on the ST side provide superior return loss characteristics, while the UPC (Ultra Physical Contact) LC connectors offer standard compatibility. This dual-connector approach maximizes network flexibility and integration capabilities. **Durability and Compliance:** The 1.8mm outside diameter yellow OFNR-rated jacket provides robust protection while meeting fire safety requirements. TAA compliance ensures this cable meets government procurement standards, making it ideal for federal and institutional networks. RoHS/ELV certification demonstrates commitment to environmental responsibility. **Applications:** • Telecommunications network interconnects • Data center backbone connections • Enterprise LAN fiber segments • Government and military networks (TAA compliant) • Long-distance signal transmission **Quality Assurance:** All cables are attenuation-tested according to ANSI/TIA/EIA-455-171-A-2001 standards, ensuring consistent performance. The 90-day limited warranty provides peace of mind, while free standard shipping on orders over $99 adds value. **Customization Available:** Require a different length? Custom lengths are available to meet your specific network requirements, providing flexibility for unique installation scenarios. Ship locations in Danville CA, Fort Worth TX, and Beaufort SC ensure rapid delivery to most domestic locations.