The JBX42022 55-meter LC/APC to LC/UPC duplex single mode fiber patch cable represents professional-grade connectivity for modern network infrastructure. Designed to meet the stringent requirements of telecommunications, data center, and enterprise environments, this cable delivers exceptional performance and reliability. **Superior Performance Specifications:** Built with 9/125 micron single mode core fiber and G.657.A1 glass construction, the JBX42022 achieves insertion loss of ≤0.35dB (typical 0.15dB) and return loss ≥20dB. These industry-leading metrics ensure minimal signal degradation over the full 55-meter length, with attenuation rates of 0.25 dB/km at 1310nm and 0.35 dB/km at 1550nm, meeting ANSI/TIA/EIA-455-171-A-2001 testing standards. The Type A to B crossover duplex configuration is the industry standard for most duplex patch cord applications. **Durable Construction and Compliance:** The cable features a yellow OFNR (Optical Fiber Non-Conductive Riser) rated PVC jacket, providing fire protection suitable for commercial building installations. Its compact 1.8mm outside diameter enables efficient cable management and routing through conduits and existing infrastructure. TAA compliant and RoHS/ELV certified, it meets government procurement requirements and environmental standards. **Versatile Applications:** Ideal for interconnecting network switches, routers, patch panels, and optical transceivers in data centers, telecommunications facilities, and enterprise networks. The 55-meter length accommodates floor-to-floor connectivity and distributed antenna systems, while custom length options provide flexibility for unique installation requirements. **Reliable Support and Availability:** Backed by a 90-day limited warranty and available from multiple U.S. distribution centers (Danville, CA; Fort Worth, TX; Beaufort, SC) for fast shipping. Free standard shipping applies to orders over $99. Manufactured in Taiwan, the United States, or China using consistent quality standards.