The brain of each Electronic Security System (ESS) is the control panel. The signals from individual sensors converge into it, either via metallic cable or wirelessly on UHF frequencies 433/868 MHz.
The control panel evaluates these signals, and according to the program settings and settings of individual monitoring zones (circuits, loops), it eventually announces an alarm state, either of the type "Object attacked", "Panic alarm" or "Fire alarm". This status can be forwarded by the control panel to, for example, the Central Security Desk (PCO) or by means of communicators (GSM or landline) directly to the owner/user of the building. It is then how he handles this information - a phone call to the police, ambulance or firefighters or a personal visit to the place of the event.