The JBX42322 SC/APC to FC/UPC duplex singlemode fiber patch cable is a critical component for building robust, high-performance fiber optic networks. This 55-meter cable combines superior optical performance with practical design features that make it an ideal choice for data centers, telecommunications facilities, and enterprise network infrastructure. **Optical Performance** Built with 9/125 singlemode fiber core, this cable delivers exceptional signal integrity across wavelengths. Attenuation specifications of 0.25 dB/km at 1310nm and 0.35 dB/km at 1550nm ensure minimal signal loss over distance. The insertion loss of ≤0.35dB (typical 0.15dB) and return loss of ≥20dB exceed industry standards, making this cable suitable for demanding applications including long-haul telecommunications, high-speed data transmission, and precision measurement systems. **Connector Technology** The SC/APC to FC/UPC configuration provides flexibility for connecting diverse network equipment. SC/APC connectors feature angled physical contacts that minimize back-reflection, while FC/UPC connectors offer universal compatibility and mechanical robustness. The Type A to B crossover polarity is the standard configuration for duplex patch cord applications. **Compliance & Safety** TAA compliant for federal procurement, RoHS/ELV certified, and manufactured in the US, Taiwan, or China. The OFNR (Optical Fiber Non-Conductive Riser) jacketing meets fire safety codes for vertical cable runs in multi-story buildings. **Practical Features** The bright yellow jacket enhances visibility and traceability in complex installations. The compact 1.8mm outside diameter allows efficient routing through existing infrastructure. G.657.A1 fiber technology provides improved macrobend performance, enabling routing flexibility without signal degradation. **Customization & Support** Custom lengths are available to match your exact installation requirements, reducing waste and installation complexity. Fast shipping from three US distribution centers (California, Texas, South Carolina) with free standard shipping on orders exceeding $99. **Applications** Ideal for fiber-to-the-home (FTTH) networks, data center cross-connects, campus backbone systems, and telecommunications infrastructure requiring high reliability and performance.