These 105Seires injectors are DC input have PoE models and non-PoE models of standard version and enhanced version that feature the performance on an industrial level, which can withstand severe working environment. With rich series and flexible port configuration, the switches are suitble for using requirements in various industrial field. Owning an unique and special industry management interface, the switches provide a comprehensive security system, perfect ring network application, QOS strategy and rich VLAN function. It is convenient to manage and maintain which is satisfied in complex environment with high density such as in factories, mines, industry automation, transportation, infrastructure, port and farmlands. High-power PoE power supply and intelligent management function are applied in various network.