The JBX42547 5-meter ST/APC to FC/UPC duplex singlemode fiber patch cable represents a superior choice for professional network infrastructure projects. This precision-engineered cable combines two 9/125 singlemode strands in a duplex configuration, enabling simultaneous bidirectional fiber optic transmission with minimal signal degradation. **Technical Excellence:** Built to ANSI/TIA/EIA-455-171-A-2001 standards, this cable achieves exceptional performance metrics: insertion loss of just 0.15dB typical (≤0.35dB maximum) and return loss exceeding 20dB. The G.657.A1 glass fiber specification ensures compatibility with modern high-speed networks operating at both 1310nm and 1550nm wavelengths. Attenuation ratings of 0.25 dB/km at 1310nm and 0.35 dB/km at 1550nm deliver outstanding long-distance transmission capabilities. **Durability & Compliance:** The yellow OFNR riser-rated jacket provides fire resistance and superior protection in commercial building environments. This cable meets RoHS/ELV directives (EU 2002/95/EC) and carries TAA compliance certification, making it ideal for government contracts, healthcare facilities, and security-conscious enterprises. The compact 1.8mm outer diameter facilitates installation in tight cable trays and conduits without compromising performance. **Connector Configuration:** The ST/APC to FC/UPC crossover configuration (Type A to B) represents the industry-standard duplex arrangement, eliminating compatibility concerns and reducing installation complexity. Both connector types are widely used in telecommunications and data center environments, ensuring integration with existing infrastructure. **Practical Applications:** Ideal for connecting network switches, fiber distribution panels, and telecommunications equipment in: • Enterprise data centers • Telecommunications facilities • Campus network installations • Security and surveillance systems • Medical imaging and diagnostic networks **Value & Support:** This cable ships from multiple US locations (Danville CA, Fort Worth TX, Beaufort SC) enabling rapid delivery. Custom lengths are available for non-standard installations. The 90-day limited warranty protects your investment, and free standard shipping applies to orders exceeding $99. Manufactured in Taiwan, US, or China with consistent quality standards across all production facilities. Choose the JBX42547 for reliable, standards-compliant fiber connectivity that meets demanding professional requirements.