The JBX85991 2.5-meter LC/SC duplex singlemode fiber patch cable represents a critical component for modern optical networking infrastructure. This professional-grade cable combines precision engineering with industry-leading performance specifications to ensure reliable, high-speed data transmission across telecommunications and data center environments. **Key Performance Features:** Built with 9/125 singlemode fiber and G.657.A1 glass fiber technology, this duplex patch cable delivers exceptional signal integrity. The cable achieves ≤0.35dB insertion loss (0.15dB typical) and ≥20dB return loss, meeting or exceeding industry standards for signal fidelity. Operating at both 1310nm and 1550nm wavelengths with attenuation rates of 0.25 dB/km and 0.35 dB/km respectively, this cable is optimized for long-distance transmissions with minimal signal degradation. **Construction & Safety Compliance:** The cable features a 1.8mm outside diameter yellow OFNR-rated jacket, providing excellent durability while meeting fire safety requirements for indoor installations. The riser rating ensures compliance with building codes without compromising performance. RoHS and EU directive 2002/95/EC compliant construction means environmental responsibility without sacrificing quality. **Connector Configuration:** The LC/UPC to SC/UPC connector pairing with Type A to B crossover configuration represents the industry standard for duplex patch applications, ensuring broad compatibility with existing network infrastructure. This universal design simplifies integration across diverse telecom and networking environments. **Practical Applications:** Ideal for data centers, telecommunications facilities, enterprise networks, and fiber-to-the-premises (FTTP) installations. The 2.5-meter length provides versatile deployment options for rack-to-rack connections and equipment interconnections. **Support & Customization:** Backed by a 90-day limited warranty and manufactured to ANSI/TIA/EIA-455-171-A standards, this cable delivers peace of mind. Custom length options are available for specialized applications. Complimentary standard shipping on orders exceeding $99, with rapid fulfillment from multiple U.S. distribution centers (Danville, CA; Fort Worth, TX; Beaufort, SC).