The JBX42532 ST/APC to ST/APC Duplex Singlemode Fiber Patch Cable represents a professional-grade solution for telecommunications and data center applications requiring long-distance, high-fidelity signal transmission. Technical Specifications: This 55-meter duplex fiber cable utilizes a 9/125 singlemode core with G.657.A1 glass fiber, meeting the most stringent performance standards. The fiber exhibits exceptional attenuation characteristics: 0.25 dB/km at 1310 nm and 0.35 dB/km at 1550 nm. With insertion loss of just 0.35dB maximum (0.15dB typical) and return loss exceeding 20dB, this cable ensures minimal signal degradation across extended runs. Connector and Polarity: Features industry-standard ST/APC connectors with Type A to B crossover polarity—the most common configuration for duplex patch cords. APC (Angled Physical Contact) connectors provide superior return loss performance and reduced back-reflection compared to UPC alternatives. Construction and Durability: The 1.8mm diameter OFNR riser-rated jacket provides excellent protection while enabling flexible routing through building infrastructure. The bright yellow PVC jacket facilitates easy identification and troubleshooting. Compliant with RoHS/ELV directives and TAA requirements for government and institutional procurement. Applications: Ideal for: • Data center patch panel connections • Long-distance telecommunications links • CWDM/DWDM network infrastructure • Campus and metro area networks • Fiber-to-the-desk installations • Network backbones Quality Assurance: All cables undergo rigorous attenuation testing per ANSI/TIA/EIA-455-171-A-2001 standards. Each unit includes a 90-day limited warranty and custom lengths are available for specific requirements. Shipping & Support: Available from multiple fulfillment centers (California, Texas, South Carolina) with free standard shipping on orders exceeding $99. Case packaging accommodates 10x10x10 configurations for bulk orders.