Patent attributes
An IP telephone device may be configured to obtain identification information of each of a plurality of receiver devices, create text data including the identification information of each of the plurality of receiver devices, receive a call request, send the text data to a sender of the call request, receive at least one identification information selected in the sender of the call request in accordance with the text data, send a first call request notice instruction to a receiver device corresponding to the received identification information, transfer voice data sent from the receiver device which has been a destination of the first call request notice instruction to the sender of the call request, and transfer voice data sent from the sender of the call request to the receiver device which has been the destination of the first call request notice instruction.
