The JBX42424 2.5m FC/APC to FC/UPC Duplex Singlemode Fiber Patch Cable is an essential component for professionals building or maintaining robust optical fiber networks. This duplex configuration allows simultaneous bidirectional communication, making it ideal for full-duplex telecommunications systems, data centers, and enterprise networks. **Key Features:** - **Connectors:** FC/APC to FC/UPC (Type A to B crossover polarity, standard for duplex applications) - **Core Specification:** 9/125 singlemode, G.657.A1 glass fiber for optimal light transmission - **Length:** 2.5 meters, customizable lengths available upon request - **Performance Metrics:** Insertion loss ≤0.35dB (0.15dB typical), return loss ≥20dB, attenuation of 0.25 dB/km @ 1310nm or 0.35 dB/km @ 1550nm - **Jacket:** Yellow OFNR (riser-rated) for safety and visibility - **Standards Compliance:** Tested per ANSI/TIA/EIA-455-171-A-2001, RoHS/ELV compliant, TAA approved **Applications:** Perfect for telecommunications carriers, ISPs, data centers, hospital networks, and government agencies requiring TAA-compliant equipment. The singlemode construction minimizes signal dispersion over extended distances, making it suitable for both short-range patch applications and longer runs. **Quality Assurance:** Each cable is manufactured to strict specifications using G.657.A1 fiber and professional-grade components. The 1.8mm outside diameter provides flexibility while maintaining signal integrity. Available in custom lengths to meet specific installation requirements. **Shipping & Support:** Ships from three convenient US locations (Danville CA, Fort Worth TX, Beaufort SC) with free standard shipping on orders exceeding $99. Includes 90-day limited warranty covering defects in materials and workmanship. Manufactured in Taiwan, USA, or China with consistent quality across all sources.