DOORPHONE SYSTEM WITH IMAGING FUNCTION, AUDIO TERMINAL CONSTITUTING THE SYSTEM, VIDEO TERMINAL, HOME GATEWAY DEVICE, AND DOORPHONE ADAPTER

摘要

When a door station generates a call signal (S1), the video from the door station is displayed on all the video terminals registered as terminals (S2). If an audio terminal responds to the call signal (YES at S6), the audio terminal having responded to the call signal is controlled so as to be connected to the door station and to enable conversation between them, the display of the video from the door station on the video terminals is stopped, and the video is displayed on the video terminal selected by the audio terminal (S7 to S14). The combination of the selected video terminal and the audio terminal is registered. The list of the video terminals is displayed and one of them is selected. The video terminal receiving the radio wave radiated from the audio terminal with the highest received radio field intensity is selected.