The JBX42680 45-meter FC/APC to LC/UPC duplex singlemode fiber patch cable is engineered for mission-critical network infrastructure deployments. This professional-grade optical accessory combines precision engineering with cost-effective performance, making it an ideal choice for telecommunications, data centers, and enterprise network installations. **Superior Performance Specifications:** This duplex cable features a 9/125 singlemode core constructed from G.657.A1 glass fiber, delivering industry-leading performance characteristics. With insertion loss of just 0.15dB typical (maximum 0.35dB) and return loss exceeding 20dB, this cable ensures pristine signal transmission. Attenuation is rated at just 0.25dB/km at 1310nm or 0.35dB/km at 1550nm, enabling reliable performance across extended distances. **Connector Configuration:** The FC/APC to LC/UPC connector pairing utilizes Type A to B crossover polarity, the industry standard for duplex patch cord applications. APC (Angled Physical Contact) connectors on the FC side provide superior return loss characteristics, while UPC (Ultra Physical Contact) connectors on the LC side offer versatility with existing infrastructure. **Build Quality and Compliance:** Manufactured from premium materials with OFNR riser-rated jacketing, this cable meets strict fire safety codes for in-building installations. The robust 1.8mm outside diameter provides durability while maintaining flexibility. TAA (Trade Agreements Act) compliance ensures suitability for government and regulated procurement. RoHS/ELV directive compliance confirms environmental responsibility. **Practical Advantages:** The distinctive yellow jacket provides high visibility during installation and maintenance, reducing connection errors. Available in custom lengths for specific deployment requirements, this cable adapts to diverse network architectures. Ships from multiple U.S. locations (Danville, Fort Worth, and Beaufort) with free standard shipping on orders exceeding $99. **Ideal Applications:** Perfect for upgrading legacy networks, connecting network equipment across building distances, telecommunications rack installations, and data center patch panel applications. The extended 45-meter length eliminates intermediate connection points, reducing signal degradation and maintenance complexity. **Warranty and Support:** Backed by a 90-day limited warranty, ensuring peace of mind with your investment. Tested to ANSI/TIA/EIA-455-171-A standards, guaranteeing consistent performance across manufacturing batches.