Patent ID: 7612656
Filing Date: 2009-11-03
Classification: G08B

Abstract:
1. A communication device comprising: a radio unit for communication with a service center, wherein the radio unit transmits an emergency signal to the service center, receives an incoming call from the service center in response to the emergency signal and answers the incoming call; a control unit for causing an emergency operation upon receiving an emergency trigger and for causing a reset operation which restarts the communication device upon receiving an automatically generated reset signal in response to a power turn-on signal; and a signal detector for outputting the reset signal to the control unit upon detecting a cause of reset; wherein the control unit outputs a continuous guard signal to the signal detector upon receiving the emergency trigger; the signal detector is held in a controlled condition that prohibits output of the reset signal to the control unit as long as the signal detector receives the guard signal from the control unit; and the control unit discontinues output of the guard signal when the incoming call is received and answered; wherein the power turn-on signal is provided by a navigation system.