The JBX42021 50-meter LC/APC to LC/UPC duplex single mode fiber patch cable represents enterprise-grade connectivity for mission-critical network infrastructure. Engineered with precision-polished LC connectors, this cable delivers superior optical performance with insertion loss of ≤0.35dB and return loss ≥20dB, tested according to ANSI/TIA/EIA-455-171-A-2001 standards. Key Technical Features: The 9/125 micron single mode fiber core with G.657.A1 specification supports wavelengths at both 1310nm and 1550nm with attenuation rates of 0.25dB/km and 0.35dB/km respectively. The duplex configuration features Type A to B crossover polarity—the industry standard for patch cord applications. The 1.8mm outside diameter jacket provides durability while maintaining flexibility for installation in tight cable management environments. Construction & Compliance: The yellow OFNR (Optical Fiber Non-Conductive Riser) rated jacket ensures compliance with building fire codes and offers excellent visibility for network maintenance. RoHS/ELV compliant and TAA-certified, this cable meets stringent government procurement standards. Manufacturing facilities in Taiwan, the US, and China ensure reliable supply chain management. Applications & Use Cases: Ideal for data centers, telecommunications facilities, campus networks, and enterprise LANs requiring reliable single mode fiber connectivity. The APC (angled physical contact) connectors minimize back-reflection, making this cable particularly valuable for sensitive optical applications where signal integrity is paramount. Customization & Support: Custom length options are available to match your specific installation requirements. Ships from multiple US locations (Danville CA, Fort Worth TX, Beaufort SC) ensuring quick delivery. All cables are individually tested and backed by a comprehensive 90-day limited warranty.