The JBX85076 12-meter LC/ST duplex singlemode fiber patch cable represents a professional solution for modern network infrastructure. Engineered to exacting specifications, this cable combines durability with superior optical performance for mission-critical applications. **Technical Specifications:** This singlemode fiber patch cable features a 9/125 core with G.657.A1 glass fiber construction, specifically optimized for long-distance, high-bandwidth applications. With insertion loss of ≤0.35dB at 0.15dB typical, the cable delivers minimal signal degradation. Return loss exceeding 20dB ensures signal integrity across your network. Attenuation performance is exceptional: 0.25 dB/km at 1310 nm or 0.35 dB/km at 1550 nm, tested to ANSI/TIA/EIA-455-171-A-2001 standards. The 1.8mm outside diameter provides flexibility while maintaining structural integrity. **Design and Construction:** The duplex configuration includes both LC/UPC and ST/UPC connectors in a Type A to B crossover arrangement—the industry standard for duplex patch cords. OFNR riser-rated jacketing ensures fire safety compliance in building installations. The distinctive yellow jacket provides superior visibility in densely cabled environments, reducing installation errors and simplifying maintenance. **Applications:** Ideal for data center interconnects, telecommunications networks, campus backbone connections, and any environment requiring reliable singlemode fiber transmission. The 12-meter length accommodates medium-distance runs typical in enterprise installations. **Compliance and Warranty:** Fully RoHS and ELV compliant per EU directive 2002/95/EC, meeting environmental and safety standards globally. Backed by a 90-day limited warranty for peace of mind. **Customization and Shipping:** Available in custom lengths to fit your specific installation requirements. Ships from multiple US locations (Danville CA, Fort Worth TX, Beaufort SC) with free standard shipping on orders exceeding $99. Case packaging accommodates up to 100 units for bulk orders.