Patent ID: 7983714
Filing Date: 2011-07-19
Classification: H04M

Abstract:
1. A communication device for communicating with another communication device via an information managing device, comprising: a transmitter unit which transmits presence information to the other communication device via the information managing device; an operation unit which accepts an operation to execute a program; and a control unit which, if the operation unit accepts the operation, judges whether the presence information currently registered needs to be changed based on executing the program; wherein, if the control unit judges that the presence information currently registered needs to be changed, the control unit changes the presence information based on executing the program; wherein the control unit controls the transmitter unit to transmit the changed presence information as updated presence information to the other communication device via the information managing device; wherein the presence information includes a call information item representing whether a telephone call is possible or not; wherein the program is an application program using a voice path; and wherein if the control unit judges that the presence information currently registered needs to be changed, the control unit updates the call information item of the presence information to indicate that a telephone call is impossible.