The JBX42366 4-meter SC/APC to ST/UPC duplex singlemode fiber patch cable represents the gold standard in fiber optic connectivity solutions. Engineered for professionals who demand reliability and performance, this cable bridges SC/APC and ST/UPC connector types in a versatile duplex configuration, making it an essential component for mixed-connector network environments. Technical Excellence: Built with 9/125 singlemode fiber core and premium G.657.A1 glass fiber, this cable delivers industry-leading performance specifications. The insertion loss of just 0.15dB typical (maximum 0.35dB) minimizes signal degradation, while return loss exceeding 20dB ensures optimal signal integrity. Attenuation rates of 0.25 dB/km at 1310nm and 0.35 dB/km at 1550nm exceed ANSI/TIA/EIA-455-171-A-2001 standards, guaranteeing consistent performance across standard telecommunications wavelengths. Practical Design Features: The bright yellow jacket provides superior visibility for quick identification in crowded cable runs, while the compact 1.8mm outside diameter enables flexible routing through tight spaces. OFNR riser-rating allows installation between building floors without conduit, simplifying network infrastructure deployments. The Type A to B crossover polarity configuration is ideal for standard duplex patch cord applications. Compliance and Reliability: Fully TAA compliant, this cable meets government purchasing requirements and is manufactured to exacting standards. Available in custom lengths for specific deployment needs, it's backed by a 90-day limited warranty. Ships from multiple US locations for fast delivery, with free standard shipping on orders exceeding $99. Applications: Ideal for data centers, telecommunications facilities, enterprise networks, fiber-to-the-premises (FTTP) installations, and any mission-critical applications requiring superior optical performance. The duplex configuration makes it perfect for full-duplex communications where simultaneous bidirectional transmission is required. Whether upgrading existing infrastructure or building new networks, the JBX42366 delivers the performance, reliability, and compliance standards professional installations demand.