SECURITY ALARM FITTED WITH MOBILE COMMUNICATION MODULE WITH USER TERMINAL Russian patent published in 2011 - IPC B60R25/00 G08B13/00 

FIELD: physics, signalling.

SUBSTANCE: invention relates to security alarm systems and can be used to guard vehicles and immovable property. The security alarm has a user terminal and a mobile communication module with a user terminal, connected by a GSM and/or CDMA standard mobile communication cellular network. The mobile communication module is supplemented by a unit for determining the connecting user terminal with an "own" or "alien" determining function, a timer for setting the time interval T1 from the moment a call comes in to the connection, a timer for setting the time interval T2 from the moment the connection breaks, a protective element mounted on the protected object and made, for example, in form of a secrete button which can provide contact with the user and a unit for monitoring connection breakdown. The latter is configured to start up the timer for setting the time interval T2 and waiting for a signal from the protective element when a connection call comes from an "own" user terminal and breaking the connection before the given time interval T1 elapses, removing the object from protection with involvement of the protective element during a time interval T2 or resetting all timers and leaving the object under protection without involvement of the protective element. Also, the unit for monitoring connection breakdown enables resetting of the timer for setting the time interval T1 and leaving the object under protection when a connection call comes from an "alien" user terminal and breaking the connection before the given time interval T1 elapses, as well as starting up the timer for setting the time interval T2 and waiting for a DTMF code when a connection call comes from an "alien" user terminal, establishing connection and elapsing of the given time interval T1, breaking the connection and calling an "own" user terminal when a DTMF code comes in, resetting all timers and leaving the object under protection if a DTMF code does not come in.

EFFECT: invention makes it easier to use a security alarm, lowers its cost without lowering quality and also improves manufacturability and simplifies assembling.

2 cl, 1 dwg