The JBX91195 20-meter SC/ST duplex singlemode fiber patch cable represents a premium solution for telecommunications, datacenter, and enterprise network installations. This professionally-engineered optical cable delivers exceptional performance with dual fiber strands configured for duplex communication. **Technical Excellence:** Built with 9/125 singlemode core and G.657.A1 glass fiber, this cable achieves superior attenuation specifications: 0.25 dB/km at 1310 nm and 0.35 dB/km at 1550 nm. Insertion loss testing confirms ≤0.35dB (0.15dB typical), while return loss exceeds 20dB, exceeding industry standards. All performance metrics comply with ANSI/TIA/EIA-455-171-A-2001 specifications. **Connector Configuration:** The SC/UPC to ST/UPC connector pairing with Type A to B crossover polarity represents the most common duplex patch cord configuration, enabling straightforward installation in existing networks. Both connector types are UPC-polished for minimal reflection and signal degradation. **Regulatory Compliance:** TAA (Trade Agreements Act) compliant and RoHS/ELV certified per EU directive 2002/95/EC, this cable meets government procurement requirements and environmental standards. The OFNR (Optical Fiber, Non-conductive, Riser) jacket rating permits installation in vertical cable runs and plenum spaces where applicable. **Installation & Durability:** With a compact 1.8mm outer diameter, the cable navigates tight conduits and cable trays efficiently. The robust plastic accessory construction withstands typical datacenter and network closet environments. Custom length options are available for non-standard requirements. **Value Proposition:** Offered with free standard shipping on orders exceeding $99 from multiple distribution centers (Danville CA, Fort Worth TX, Beaufort SC), this cable ensures rapid deployment. The 90-day limited warranty provides additional confidence in product reliability. Ideal for organizations prioritizing performance, compliance, and cost-effective network infrastructure upgrades.