Remote vehicle monitoring system and vehicle-mounted device therefor

A vehicle-mounted device for a remote vehicle monitoring system having an external stolen-vehicle monitor station, the device comprising:

• position specifying means for specifying a present position of a vehicle;
• communication means for radio-communicating with the external monitor station by using a car phone;
• and
• control means for controlling radio communication of the present position between the communication means and the stolen-vehicle monitor station,
• wherein the control means is constructed to automatically set an operation mode thereof to a stolen-vehicle monitoring mode in response to an occurrence of a vehicle theft, interrupt communication between the communication means and an opponent when the opponent is other than the stolen-vehicle monitor station even when the communication means is in the course of communication with the opponent other than the monitor station, reject an instruction for generating a call to an external side until the stolen-vehicle monitoring mode is cancelled, and connect the communication means to the stolen-vehicle monitor station to transmit the present position of the stolen-vehicle to the stolen-vehicle monitor station.

A vehicle monitoring system comprising:

• a monitor station for radio communication;
• and
• a vehicle-mounted device mounted in a vehicle for radio communication with external phones one of which is provided in the monitor station,
• wherein the vehicle-mounted device has position specifying means for specifying a present position of the vehicle, communication means for communicating with the external phones, and control means for controlling communication between the communication means and the monitor station,
• wherein the control means is constructed to check an opponent of communication when receiving a call in the course of communication of the communication means, and
• wherein the control means is constructed to interrupt communication between the communication means and the opponent when the opponent is other than the monitor station and connect the communication means to the monitor station in response to a call from the monitor station, even when the communication means is in the course of communication with the opponent other than the monitor station.