The JBX42202 55-meter LC/APC to FC/UPC duplex singlemode fiber patch cable represents enterprise-grade connectivity engineered for mission-critical network infrastructure. Designed for telecommunications providers, data centers, and network integrators, this cable bridges different connector ecosystems while maintaining signal integrity across long distances. **Technical Excellence:** Features 9/125 singlemode fiber core optimized for single wavelength transmission with minimal dispersion. The G.657.A1 specification glass fiber provides bend-insensitive performance, allowing for tighter routing in crowded environments without signal degradation. With attenuation ratings of 0.25 dB/km at 1310 nm or 0.35 dB/km at 1550 nm, this cable supports both traditional and modern optical wavelengths used in telecommunications networks. **Superior Performance Metrics:** Insertion loss of ≤0.35dB (typical 0.15dB) ensures minimal signal loss over the 55-meter span. Return loss specification of ≥20dB prevents signal reflection issues that could degrade network performance. These specifications exceed ANSI/TIA/EIA-455-171-A-2001 standards, ensuring compatibility with demanding applications. **Regulatory Compliance & Safety:** TAA (Trade Agreements Act) compliant for government and institutional procurement. RoHS (Restriction of Hazardous Substances) and ELV (End of Life Vehicle) directive compliant per EU directive 2002/95/EC. OFNR (Optical Fiber Non-conductive Riser) jacket rating ensures safe installation in building risers and vertical cable runs. **Practical Features:** Distinctive yellow jacket provides visual identification for easy cable management and troubleshooting. 1.8mm outside diameter allows flexible routing through cable trays and conduit. Duplex configuration (two fiber strands) enables full-duplex communication in a single cable assembly. Custom lengths available for specific deployment requirements. **Shipping & Support:** Ships from strategically located US warehouses (Danville CA, Fort Worth TX, and Beaufort SC) for faster delivery. Free standard shipping available on orders exceeding $99. Backed by 90-day limited warranty covering manufacturing defects. Case packaging (10x10x10) provides protection during transit and storage. **Ideal Applications:** Telecommunications network backbone connections, data center cross-connects, fiber-to-the-premise (FTTP) installations, and legacy system integration where LC/APC to FC/UPC connectivity is required.