The JBX42149 is a professional-grade 90-meter fiber optic patch cable engineered for high-performance network environments requiring long-distance signal transmission. This duplex configuration integrates SC/APC and SC/UPC connectors, making it a Type A to B crossover cable—the industry standard for most duplex patch cord applications. **Key Technical Specifications:** Constructed with G.657.A1 single-mode fiber, this cable delivers exceptional performance characteristics. The 9/125 micrometer core-to-cladding ratio is specifically designed for single-mode transmission with superior bandwidth capabilities. Insertion loss performance is measured at ≤0.35dB (0.15dB typical), while return loss exceeds 20dB, ensuring minimal signal reflection and data integrity. Attenuation rates of 0.25 dB/km at 1310 nm and 0.35 dB/km at 1550 nm comply with ANSI/TIA/EIA-455-171-A-2001 testing standards. **Design and Construction:** The cable features a compact 1.8mm outside diameter with a protective yellow polyvinyl chloride jacket rated OFNR (Optical Fiber Non-conductive Riser). This riser rating allows vertical installation in building spaces between floors while maintaining flame propagation safety. The yellow color coding provides immediate visual identification in complex cabling environments, reducing troubleshooting time and installation errors. **Compliance and Certifications:** Fully TAA (Trade Agreements Act) compliant, this patch cable meets federal procurement standards. RoHS/ELV directives ensure environmental responsibility and compliance with EU regulations. The product undergoes rigorous attenuation testing before shipment. **Applications:** Ideal for data centers, telecommunications facilities, enterprise networks, and long-distance fiber optic installations. The duplex configuration enables simultaneous bidirectional communication in telecommunications systems and network backbone applications. **Shipping and Support:** Available with free standard shipping on orders exceeding $99, with dispatch from multiple US locations. Backed by a 90-day limited warranty. Custom lengths available upon request for specialized installations.