| 摘要 |
Disclosed is a system which can detect a vehicle that is missing or stolen on the basis of a missing vehicle signal which is transmitted from a car audio system (100) in which a transmission apparatus is installed for transmitting the missing vehicle signal. When the car audio (100) is initiated, a transmission control part (180) causes a first display (170) to show a message requesting to input a password and causes an audio part (130) to mute an outputting of the audio sound. When the password is inputted by a keyboard (160), the control part (180) causes an audio part (130) to stop muting the audio sound, and causes a transmission part (150) to transmit the missing vehicle signal when the password inputted from the keyboard (160) is different from a password stored in a first memory (140). A receiving apparatus includes an alarm generation part for ringing an alarm sound, a receiving part for receiving the missing vehicle signal, a demodulation part for demodulating the missing vehicle signal in order to detect data included in the missing vehicle signal, a modem for transmitting the data through a telephone line, and a receiving control part for controlling the alarm generation part, the display, and the modem according to whether the receiving part receives the missing vehicle signal or not. |
