In line with the production of radio products, the company has designed and built a wireless fire alarm system. The fire alarm system produced by this company includes various parts, one of which is the central unit of the fire alarm system.
The central unit of the fire alarm system consists of two parts, the first part is the radio interface, and the second part is the information processing unit and interaction with the user.
The radio interface receives the data packets sent from different nodes of the system and transmits them to the information processing unit and the user interface. It also receives the commands issued to the nodes from the information processing and user interaction unit and sends them to the nodes.
Three working states are defined for the information processing and user interaction unit, system startup state, system maintenance state, and system operation state.

The system is in normal condition and is in operational status to interact with the public. But putting the system in the start-up state or the maintenance state is possible only for the expert user with the defined access permission.