The JBX42665 3m FC/APC to LC/UPC duplex singlemode fiber patch cable is engineered for critical network infrastructure applications requiring maximum reliability and minimal signal loss. Built with precision-grade 9/125 singlemode fiber and G.657.A1 glass composition, this cable delivers exceptional performance characteristics that exceed industry standards. **Key Performance Features:** This patch cable achieves impressive attenuation specifications: 0.25 dB/km at 1310 nm and 0.35 dB/km at 1550 nm, tested in accordance with ANSI/TIA/EIA-455-171-A-2001 standards. The insertion loss rating of ≤0.35dB (typical 0.15dB) ensures minimal signal degradation over the 3-meter run, while return loss of ≥20dB provides excellent signal integrity. Type A to B crossover polarity configuration makes this the ideal choice for duplex patch cord applications. **Superior Durability & Safety:** The cable features OFNR (Optical Fiber Nonconductive Riser) rated yellow jacketing, meeting fire safety requirements for vertical runs in commercial buildings. The compact 1.8mm outside diameter facilitates installation through conduits and tight spaces without compromising durability. TAA compliance ensures government procurement eligibility, while RoHS/ELV certification confirms environmental responsibility. **Ideal Applications:** Perfect for telecommunications networks, data centers, fiber-to-the-premises (FTTP) installations, and enterprise network expansions. The FC/APC to LC/UPC configuration bridges equipment from different manufacturers, making it invaluable for mixed-vendor environments. **Convenient Shipping & Support:** Enjoy free standard shipping on orders over $99 from multiple U.S. warehouses (California, Texas, or South Carolina). Custom lengths are available for specialized installations. Each cable includes a 90-day limited warranty for peace of mind. Available in bulk packaging (10x10x10) for enterprise deployments.