PROBLEM TO BE SOLVED: To provide a communication device that allows a caller to casually have communication without having the psychology of opportunity loss in which the caller does not make a call now because it takes a long time if the caller makes a call.SOLUTION: When an incoming call of normal conversation from a mobile terminal 10A arrives, a mobile terminal 10B displays an [incoming call arriving: normal conversation] button RN as well as a [short time conversation acceptance] button RSb showing acceptance of a call of short time conversation. A response by selecting the [short time conversation acceptance] button RSb causes the call origination side terminal 10A to display a [short time conversation request acceptance] button RSa showing acceptance of a short time conversation request, which informs a user of arrival of a response from an incoming side user showing that not long conversation but conversation such as casual greeting can be accepted. Pressing down the [short time conversation request acceptance] button RSa to accept the short time conversation on the origination side causes a countdown of preset short time conversation period to start, and opens mutual communication line which enables conversation limited to a short time until the countdown is completed.SELECTED DRAWING: Figure 7
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