Communication devices in the manufacturing industry are foundational technologies that govern data transmission, information sharing, and remote monitoring and control on production floors. These include industrial routers, switches, IoT gateways, 5G/local 5G compatible modules, wireless LAN access points, and optical communication devices. They are indispensable for a wide range of applications such as smart factory implementation, M2M communication, equipment operation monitoring, predictive maintenance, AGV control, quality control, and supply chain collaboration. High speed, low latency, high reliability, robustness, and security are required, with support for both wired and wireless connections and various protocols. They enable real-time data collection and analysis, significantly contributing to improved productivity, cost reduction, and quality stabilization.