The JBX42315 20-meter SC/APC to FC/UPC duplex singlemode fiber patch cable represents a reliable solution for professionals requiring high-performance optical connectivity. Constructed with precision-engineered 9/125 singlemode fiber conforming to G.657.A1 specifications, this cable delivers consistent performance across standard telecom wavelengths (1310nm and 1550nm). **Superior Performance Characteristics:** With insertion loss rated at ≤0.35dB (typical 0.15dB) and return loss exceeding 20dB, this cable minimizes signal degradation and reflection. Testing conducted per ANSI/TIA/EIA-455-171-A-2001 standards ensures verified performance metrics. The attenuation specifications of 0.25 dB/km at 1310nm and 0.35 dB/km at 1550nm make this cable suitable for extended runs in campus and long-distance applications. **Durability and Compliance:** The robust yellow OFNR-rated jacket provides flame resistance and durability in building riser installations. With an outer diameter of 1.8mm, the cable integrates seamlessly into standard conduit systems and cable trays. TAA compliance and RoHS/ELV certification ensure suitability for government contracts and environmentally conscious procurement initiatives. **Versatile Configuration:** The SC/APC to FC/UPC connector pairing with Type A to B crossover polarity accommodates diverse network topologies. This configuration is widely used in telecommunications, data centers, and service provider networks for equipment interconnection. **Practical Advantages:** Custom length options allow tailored solutions for specific installations. The 90-day limited warranty provides peace of mind, while domestic and international manufacturing ensures consistent availability. Free standard shipping on orders exceeding $99 reduces procurement costs. **Applications:** Ideally suited for telecommunications infrastructure, ISP backhaul networks, enterprise data center deployments, and military/government installations requiring TAA compliance. The duplex configuration enables bidirectional communication on single cable runs, streamlining installation complexity. Whether you're a network integrator, IT professional, or telecommunications specialist, the JBX42315 delivers professional-grade performance with proven reliability and standards compliance.