Patent ID: 7109860

Claim:
A surveillance apparatus for carrying out surveillance through a mobile phone, comprising a monitor assembly for transmitting signals sequentially through a switchboard and at least one base station to the mobile phone; wherein said monitor assembly comprises: a microprocessor, being a main control center of said monitor assembly; a digital/analog converter, coupled with said microprocessor; a microphone, coupled with said digital/analog converter; a speaker, coupled with said digital/analog converter; an electric bell, coupled with said microprocessor for sending an electric bell signal to said microprocessor when said electric bell is pressed; a signal separator coupled to said microprocessor and disposed between said monitor assembly and said switchboard, said signal separator being arranged to be connected to a fixed telephone; and a control module coupled to said microprocessor, an end of said control module being coupled to said signal separator and the other end of said control module being coupled to a door security system of a building so that, if a visitor presses the electric bell, the door security system of the building may be used directly for asking the identity of the visitor or opening the door for the visitor, wherein, after said microprocessor receives said electric bell signal, a notice signal is sent immediately to said switchboard, said base station, and said mobile phone to notify a holder of said mobile phone that the electric bell has been pressed so that the holder of the mobile phone may carry communicate with the visitor through the microphone, speaker, switchboard, and mobile phone, and receive external telephone calls dialed to the fixed telephone through the signal separator, the switchboard, and the mobile phone, if the holder of the mobile phone is not at home.