The JBX92199 40m SC/ST Duplex Singlemode Fiber Patch Cable represents premium optical connectivity engineered for mission-critical applications requiring superior performance and reliability. This professional-grade fiber optic solution combines advanced fiber technology with precision connector engineering to deliver exceptional network performance. **Key Technical Features:** This duplex patch cable features genuine 9/125 singlemode fiber core with G.657.A1 glass fiber construction, the industry standard for long-distance, high-bandwidth applications. The SC/UPC to ST/UPC connector configuration with Type A to B crossover polarity accommodates the most common duplex patch cord requirements. At 40 meters, this cable spans substantial distances while maintaining signal integrity with insertion loss of merely ≤0.35dB and robust return loss ≥20dB. **Performance & Reliability:** Tested in accordance with ANSI/TIA/EIA-455-171-A-2001 standards, attenuation specifications include 0.25dB/km at 1310nm or 0.35dB/km at 1550nm—exceptional performance across the full spectrum of optical transmission wavelengths. The compact 1.8mm outside diameter facilitates installation in congested cable management scenarios without sacrificing durability. **Compliance & Certifications:** Full TAA compliance ensures eligibility for government procurement and federal projects. RoHS/ELV certification and EU Directive 2002/95/EC compliance demonstrate environmental responsibility. OFNR riser-rated jacketing guarantees compliance with building safety codes and fire ratings for commercial installations. **Ideal Applications:** - Data center interconnects and facility backbone cabling - Telecommunications infrastructure - Enterprise network deployments - Government and federal IT installations - Campus area networks (CANs) - Hybrid fiber/copper network architectures **Flexibility & Support:** Custom length options are available for unique installation requirements. Ships promptly from multiple US locations (Danville, CA; Fort Worth, TX; Beaufort, SC) with free standard shipping on orders exceeding $99. Backed by a 90-day limited warranty for complete peace of mind.