FIELD: physics.
SUBSTANCE: inside an alarm sending device there is a module for identifying the subscriber of a mobile service provider, which is not limited by operation in only one mobile communication network of the given country. Also, operation of the alarm sending device and functioning of the connection with the alarm sending device is controlled by setting up a test connection. Functioning of alarm sending devices and connection with the alarm sending device is confirmed by the device for sending alarm actively refusing to set up a test connection. An alarm is sent to authorities by setting up a special telephone call from the alarm sending device to the alarm centre, if the alarm cannot be sent to the authorities through the main connection of the alarm sending device during a predetermined period of time.
EFFECT: high reliability of sending an alarm in a signalling system.
12 cl, 4 dwg
