The JBX42142 SC/APC to SC/UPC duplex single mode fiber patch cable represents the gold standard in optical connectivity solutions. At 55 meters in length, this extended-reach patch cable is perfect for large facility installations, data center layouts, and campus networking infrastructure where standard shorter cables fall short. **Technical Excellence:** Featuring a precision 9/125 singlemode fiber core with G.657.A1 glass composition, this cable delivers superior optical performance. The SC/APC connector on one end and SC/UPC on the other creates a Type A to B crossover configuration—the industry standard for duplex patch cord applications. With tested attenuation rates of 0.25 dB/km at 1310nm and 0.35 dB/km at 1550nm, signal degradation remains minimal across both primary wavelength windows, making this cable suitable for 10Gb and higher speed applications. **Key Performance Specifications:** - Insertion Loss: ≤0.35dB (0.15dB typical) - Return Loss: ≥20dB - Outside Diameter: 1.8mm for flexible routing - Jacketing: Riser-rated (OFNR) for building code compliance - Polarity: Type A to B Crossover configuration **Compliance & Certification:** TAA compliant for government procurement requirements. RoHS/ELV certified per EU directive 2002/95/EC, ensuring environmental responsibility and restriction-compliant materials. Attenuation testing conducted per ANSI/TIA/EIA-455-171-A-2001 standards, guaranteeing accuracy and reliability. **Installation & Maintenance:** The vibrant yellow jacket provides instant visual identification, reducing installation errors and simplifying network management. The cable's 1.8mm diameter allows easy routing through tight spaces and conduits. Ships with free standard shipping on orders exceeding $99, and includes a 90-day limited warranty for peace of mind. **Applications:** Ideal for telecom infrastructure, enterprise data centers, university campus networks, ISP facilities, and any professional installation requiring extended single mode fiber runs with superior optical performance. Compatible with standard SC connector equipment and network devices supporting 9/125 single mode specifications.