The JBX42201 LC/APC to FC/UPC duplex singlemode fiber patch cable represents a professional-grade solution for demanding fiber optic network environments. At 50 meters in length, this cable provides the extended reach necessary for complex network layouts while maintaining exceptional signal integrity. **Technical Excellence:** Built with 9/125 singlemode fiber and G.657.A1 glass specification, this cable delivers superior performance across standard telecommunications wavelengths. Attenuation rates of 0.25 dB/km at 1310 nm and 0.35 dB/km at 1550 nm ensure minimal signal loss over extended distances. The ≤0.35dB insertion loss (0.15dB typical) and ≥20dB return loss exceed industry requirements, with all testing performed in accordance with ANSI/TIA/EIA-455-171-A-2001 standards. **Construction and Durability:** The yellow OFNR (Optical Fiber Non-conductive Riser Rated) jacket provides robust protection suitable for indoor riser applications while meeting strict fire safety codes. The 1.8mm outer diameter allows for easy routing through cable trays and conduit systems. Duplex configuration with Type A to B crossover polarity represents the most common arrangement for patch cord applications. **Compliance and Certification:** Fully TAA compliant and RoHS/ELV certified per EU directive 2002/95/EC, this cable meets government procurement requirements and environmental standards. LC/APC connectors provide superior return loss characteristics, while FC/UPC connectors offer versatility with existing infrastructure. **Practical Advantages:** Available in custom lengths to match specific installation requirements. Ships from multiple U.S. distribution centers (Danville CA, Fort Worth TX, Beaufort SC) with free standard shipping on orders exceeding $99. Backed by a 90-day limited warranty. **Applications:** Ideal for data center interconnections, telecommunications networks, enterprise backbone systems, and any installation requiring reliable, tested singlemode fiber connectivity. The duplex configuration supports bidirectional communication, making it essential for modern networking infrastructure.