Patent ID: 8675037

Claim:
A two-way communication system in which a plurality of communication terminal devices are mutually connected via a network, each of said communication terminal devices comprising: a camera; and a terminal main unit; wherein said camera includes an imaging unit configured to image a subject to output image data; and wherein said terminal main unit includes a remote control signal reception unit configured to receive a remote control signal, a communication unit configured to transmit image data to another communication terminal device, and a mute control unit configured to selectively switch said image data transmitted from said communication unit to image data output from said imaging unit or mute image data, based on a remote control signal for mute control received at said remote control signal reception unit and by determining whether a setting to validate or invalidate interlocking between image muting and audio muting is set, wherein, when the setting to validate or invalidate the interlocking is set and the interlocking is invalid, the image data transmitted from said communication unit is the image data output from said imaging unit when mute control is in a mute ON state, wherein the mute image data is an image selected, from a plurality of registered mute images corresponding respectively to a plurality of registered image data stored in a memory, based on a user's selection operation that sets the registered image data corresponding to the image selected as the mute image data, the plurality of registered mute images including an image imaged by said imaging unit and an image input to an external input terminal of the communication terminal device configured to input image data.