The JBX42629 FC/APC to ST/UPC duplex singlemode fiber patch cable represents professional-grade connectivity for mission-critical network infrastructure. This 90-meter cable is engineered for telecommunications, data center, and enterprise networking applications where reliability and performance are non-negotiable. **Technical Excellence:** Built with 9/125 singlemode fiber core and G.657.A1 glass construction, this cable supports both 1310nm and 1550nm wavelengths with minimal attenuation (0.25 dB/km at 1310nm, 0.35 dB/km at 1550nm). The ultra-low insertion loss of 0.15dB typical ensures signal integrity over extended runs, while return loss exceeding 20dB provides superior performance for sensitive optical communications. **Connector Configuration:** The FC/APC to ST/UPC configuration with Type A to B crossover polarity represents the most common duplex patch cord standard, facilitating seamless integration with existing infrastructure. Both connector types are industry-standard, widely compatible with network equipment from major manufacturers. **Safety & Compliance:** The OFNR (Riser Rated) yellow jacket meets stringent fire safety requirements for in-building use. TAA compliance certifies this cable for US government procurement, while RoHS/ELV certification ensures environmental responsibility. All attenuation specifications are tested according to ANSI/TIA/EIA-455-171-A-2001 standards. **Installation & Visibility:** The distinctive yellow jacket provides exceptional visibility during installation, routing, and maintenance activities. At 1.8mm outer diameter, the cable offers flexibility for routing through tight spaces, cable trays, and conduits without excessive stress on connector assemblies. **Flexibility & Support:** While this product is available in the standard 90-meter length, custom lengths are available upon request to match your exact installation requirements. Multiple US shipping locations (California, Texas, South Carolina) ensure rapid delivery with free standard shipping on orders exceeding $99. **Application Areas:** Ideal for connecting data center equipment, telecommunications infrastructure, enterprise network switches, and fiber-optic backbone networks. The duplex configuration supports bi-directional communication with single-cable runs, simplifying installation and reducing cable clutter. **Warranty & Support:** Backed by a 90-day limited warranty, this cable is manufactured in Taiwan, the US, or China depending on availability, maintaining consistent quality across all production sources. Professional-grade construction ensures years of reliable service in demanding environments.