Patent attributes
A television door intercom apparatus improves recognition performance for a resident inside a house to recognize a visitor conducting a call operation at the entrance and security in responding to the call. A call detection circuit 31 of a residential master station 2 detects a call when a visitor pushes a call button 11 of a door intercom substation 1, activates a signal generator circuit 32 and causes a master station speaker 39 to output a call sound so that a communication can be exchanged between a substation microphone 16 and a substation speaker 17 of the door intercom substation and a master station microphone 38 and the master station speaker of the residential master station. When a picture monitor 36 of the residential master station displays a picture taken by a camera 13 of the door intercom substation, the residential master station further includes a message transmission circuit 34 activated when the call detection circuit detects the call, for causing the substation speaker to output a message content of a message storage circuit 33 storing in advance a predetermined message.
