The JBX88271 50-meter ST/ST duplex singlemode fiber patch cable represents the pinnacle of telecommunications-grade connectivity. Designed for professionals who demand reliability and performance, this cable features singlemode 9/125 core construction that minimizes signal attenuation and maximizes transmission distance—critical for long-span applications in data centers, telecommunications facilities, and enterprise networks. **Superior Performance Specifications:** This cable achieves exceptional attenuation rates of 0.25 dB/km at 1310nm and 0.35 dB/km at 1550nm, with typical insertion loss of only 0.15dB and maximum of 0.35dB. The return loss specification of ≥20dB ensures signal integrity for precision applications. All performance metrics are tested in accordance with ANSI/TIA/EIA-455-171-A-2001 standards, guaranteeing consistent quality. **Robust Construction:** The 1.8mm outside diameter cable features OFNR (Optical Fiber Nonconductive Riser) rated blue jacketing, making it suitable for installation in vertical runs and plenum spaces. The G.657.A1 fiber glass provides excellent bend radius performance while maintaining singlemode signal propagation characteristics. **Professional Compatibility:** The ST/UPC to ST/UPC connector configuration with Type A to B crossover polarity represents the industry standard for duplex patch cord applications. This ensures seamless integration with existing telecommunications infrastructure and network equipment. **Compliance & Certification:** Full TAA compliance and RoHS/ELV certification make this cable suitable for government procurement, enterprise deployments, and regulated environments. The 90-day limited warranty provides peace of mind for critical installations. **Flexibility & Availability:** While this standard 50-meter length covers most applications, custom lengths are available for specialized requirements. Ships from multiple U.S. locations with free standard shipping on orders over $99, ensuring rapid deployment when you need it. Whether upgrading legacy telecommunications systems or deploying new fiber infrastructure, the JBX88271 delivers the performance, reliability, and compliance modern networks demand.