The JBX87191 SC/ST duplex singlemode fiber patch cable is a mission-critical component for modern telecommunications and data center infrastructure. This 9-meter cable represents the pinnacle of fiber optic connectivity, delivering reliable signal transmission for demanding applications. **Technical Excellence:** Featuring a precision 9/125 singlemode core with advanced G.657.A1 glass fiber technology, this cable provides exceptional performance across standard telecom wavelengths. The measured insertion loss of ≤0.35dB (typical 0.15dB) ensures minimal signal degradation, while return loss specification of ≥20dB prevents signal reflection issues. Attenuation rates of 0.25 dB/km at 1310nm and 0.35 dB/km at 1550nm comply with industry standards (ANSI/TIA/EIA-455-171-A-2001), making it suitable for both short and intermediate-distance runs. **Compliance & Safety:** TAA (Trade Agreements Act) compliance makes this cable suitable for government and GSA contract projects. Full RoHS/ELV directive compliance (EU 2002/95/EC) ensures environmental responsibility and safe operation in regulated industries. The OFNR riser-rated jacketing provides fire-safety certification for in-building vertical distribution. **Practical Design Features:** The duplex configuration with Type A to B crossover polarity represents the most common industry standard, eliminating compatibility concerns. The 1.8mm outside diameter balances durability with cable management flexibility. Bright blue jacketing simplifies network identification and troubleshooting. Available in custom lengths for non-standard installations. **Applications:** Ideal for telecommunications networks, data center interconnections, campus area networks (CANs), and fiber-to-the-premises (FTTP) deployments. Suitable for both new installations and legacy system upgrades. **Value Proposition:** With a 90-day limited warranty and free standard shipping on orders exceeding $99, this professional-grade patch cable offers exceptional reliability without premium pricing. Sourced from multiple manufacturing locations (Taiwan, US, China) ensuring consistent availability and competitive pricing.