The JBX42461 12-meter FC/APC to FC/APC duplex singlemode fiber patch cable represents a professional-grade solution for organizations requiring reliable, high-performance optical connectivity. Engineered to meet the demands of modern telecommunications infrastructure, data centers, and enterprise networks, this cable delivers consistent performance across critical applications. **Technical Excellence** This singlemode patch cable features a 9/125 micrometer core with G.657.A1 glass fiber composition, specifically designed to minimize signal loss and maximize transmission quality. With insertion loss ratings of ≤0.35dB at typical performance and return loss exceeding 20dB, the cable meets rigorous ANSI/TIA/EIA-455-171-A-2001 standards. The attenuation specifications of 0.25 dB/km at 1310 nm and 0.35 dB/km at 1550 nm ensure optimal performance across standard telecommunications wavelengths. **Durability and Compliance** Constructed with an OFNR (Optical Fiber Non-Conductive Riser) rated jacket, the cable provides enhanced fire safety and building code compliance. The 1.8mm outside diameter delivers optimal balance between flexibility and protection. Full RoHS/ELV compliance and TAA certification make this cable ideal for government contracts, federal projects, and organizations with stringent procurement requirements. **Practical Design Features** The distinctive yellow jacket provides superior cable identification in multi-fiber installations, reducing configuration errors and simplifying network administration. The Type A to B crossover polarity configuration (standard for duplex patch cords) ensures proper signal transmission. FC/APC connectors deliver superior return loss performance compared to standard connectors, critical for sensitive optical applications. **Availability and Support** This cable ships from multiple U.S. locations (Danville CA, Fort Worth TX, and Beaufort SC), ensuring rapid delivery. Qualify for free standard shipping on orders exceeding $99. Custom lengths are available for specialized installations requiring non-standard specifications. The 90-day limited warranty provides peace of mind for mission-critical deployments. **Ideal Applications** Perfect for telecommunications facilities, data center connectivity, long-distance signal transmission, DWDM systems, and enterprise backbone networks. The singlemode construction makes this cable the choice for carriers and service providers requiring extended reach and minimal signal degradation.