The JBX42485 3-meter ST/APC to ST/UPC duplex singlemode fiber patch cable represents professional-grade connectivity solutions for modern optical network infrastructure. This duplex configuration provides simultaneous bidirectional communication on two fiber strands, making it ideal for full-duplex data transmission in telecommunications and data center environments. CONNECTOR SPECIFICATIONS: The cable features ST/APC (Angle Polished Connector) on one end and ST/UPC (Ultra Polished Connector) on the other, configured as Type A to B crossover—the most common polarity arrangement for duplex patch cords. This cross-polarity design enables reliable signal transmission between different network equipment types. OPTICAL PERFORMANCE: Built with 9/125 singlemode fiber meeting G.657.A1 specifications, this cable delivers outstanding optical characteristics. Insertion loss is exceptionally low at ≤0.35dB (0.15dB typical), while return loss exceeds 20dB, ensuring minimal signal reflection and degradation. Attenuation rates of 0.25 dB/km at 1310nm and 0.35 dB/km at 1550nm enable long-distance transmission with minimal signal loss. CONSTRUCTION & COMPLIANCE: The yellow jacket provides high visibility for cable identification and management, while OFNR (Optical Fiber Non-conductive Riser) rating certifies safety in commercial building risers. The 1.8mm diameter outer jacket accommodates standard cable trays and conduits. TAA compliant and RoHS/ELV certified, this cable meets government procurement standards and environmental regulations. APPLICATIONS: Perfect for data centers, telecommunications facilities, fiber-to-the-desktop installations, and network backbone connections. The 3-meter length suits equipment interconnection within equipment rooms and network closets. CUSTOM OPTIONS: Available in custom lengths for specialized installation requirements. Ships from multiple US locations with free standard shipping on orders over $99. Backed by 90-day limited warranty and tested to ANSI/TIA/EIA standards for quality assurance.