The JBX87189 7-meter SC/ST Duplex Singlemode Fiber Patch Cable is a mission-critical component for modern data centers, telecommunications facilities, and enterprise networks requiring reliable long-distance signal transmission. This professional-grade cable combines proven singlemode fiber technology with industry-standard connector configurations to deliver exceptional performance in demanding applications. **Technical Excellence:** Features a 9/125 micron singlemode fiber core with G.657.A1 specification, supporting both 1310nm and 1550nm transmission wavelengths. The cable achieves exceptional low attenuation rates of 0.25 dB/km at 1310nm and 0.35 dB/km at 1550nm, with typical insertion loss of just 0.15dB. Return loss specification of ≥20dB ensures signal integrity for bidirectional communication protocols. **Connector Configuration:** SC/UPC to ST/UPC connectors with Type A to B crossover polarity accommodate standard duplex patch cord applications. Both connector types feature Ultra-Polished Connector (UPC) geometry for minimal back-reflection and superior signal quality. **Installation & Compliance:** OFNR riser-rated jacketing (1.8mm outside diameter) meets fire safety codes for building vertical runs. TAA compliant certification qualifies this cable for federal government procurement. RoHS/ELV directive compliance ensures environmental responsibility. Manufactured in Taiwan, USA, or China with multi-location US distribution from Danville CA, Fort Worth TX, and Beaufort SC. **Certification & Testing:** Attenuation tested per ANSI/TIA/EIA-455-171-A-2001 standards with full technical documentation. Includes 90-day limited warranty for buyer protection. Custom lengths available for specialized installations requiring non-standard configurations. **Applications:** Ideal for data center interconnects, telecommunications closets, enterprise networking backbones, fiber-to-the-desktop installations, and laboratory testing environments. The duplex configuration supports simultaneous bidirectional communication. **Value Proposition:** Combines professional performance with cost-efficiency. Free standard shipping on orders exceeding $99 reduces total acquisition costs. Single-mode technology extends transmission distances beyond multimode alternatives while maintaining superior signal quality.