FIELD : information technology.SUBSTANCE : each alarm installation mounted on the corresponding real estate unit and comprises a first controller, a control module, security detectors, announcers and an objective transceiving module which is configured to perform two-way communication with other alarm installations and transmit data to a monitoring point. The objective transceiving module includes a transceiver for inter-object communication, an external radio channel transmitter, a second controller and a controlled antenna switch. The monitoring point includes an external radio channel receiver, a panel terminal device, a centralised viewing panel and block of modems which are configured to connect to standard communication networks for providing communication with control components.EFFECT : use of short-range inter-object communication apparatus and a long-range external radio channel significantly simplifies and lowers the cost of the system.3 cl, 4 dwg