Industrial communication equipment and network-related products that enable inter-device communication, data collection, and supervisory control in factories and manufacturing sites. Includes industrial Ethernet switches, serial communication converters, wireless communication modules, fieldbus devices, and industrial routers used for PLC communication, HMI connection, and SCADA system construction. Unlike general IT equipment, these products are designed with emphasis on durability, real-time performance, and high reliability in factory environments, making them essential for manufacturing line control and facility monitoring system construction.