The JBX42191 9-meter LC/APC to FC/UPC duplex singlemode fiber patch cable represents a premium solution for demanding network infrastructure applications. Engineered to professional standards, this cable delivers reliable fiber signal transmission with industry-leading performance specifications. **Technical Excellence:** Built with 9/125 singlemode fiber and G.657.A1 glass composition, this duplex patch cable minimizes signal degradation across extended runs. The duplex configuration supports simultaneous bidirectional transmission through two independent fiber strands, essential for full-duplex communication protocols. Insertion loss of ≤0.35dB and return loss ≥20dB ensure signal integrity and minimal reflection interference. Performance metrics are independently verified according to ANSI/TIA/EIA-455-171-A-2001 standards, guaranteeing consistent quality. **Professional Installation Features:** The distinctive yellow OFNR-rated jacket provides dual benefits: enhanced visibility for cable identification and compliance with building safety standards for riser installations. The 1.8mm outside diameter offers balanced durability and flexibility for routing through tight spaces. LC/APC and FC/UPC connectors with Type A to B crossover polarity are configured for standard duplex applications, eliminating compatibility concerns. **Regulatory & Enterprise Compliance:** TAA compliance makes this cable ideal for government contracts and large-scale enterprise deployments. RoHS and EU directive 2002/95/EC certification confirm environmentally responsible manufacturing without hazardous substances. The 90-day limited warranty provides additional assurance for mission-critical installations. **Versatile Deployment:** Ideal for data centers, telecommunications facilities, campus networks, and broadcast installations where reliable single-mode fiber transmission is non-negotiable. Available in custom lengths for specific project requirements. Ships with free standard shipping on orders over $99 from multiple US distribution centers for rapid delivery. **Care & Maintenance:** Protect connectors with dust caps when not in use. Avoid excessive bending (minimum bend radius 10cm) to maintain fiber integrity. Store in temperature-controlled environments to prevent premature jacket degradation.