| 摘要 |
PROBLEM TO BE SOLVED: To provide a telephone terminal capable of efficiently terminating the group call, when a key person does not participate in telephone call. SOLUTION: The telephone apparatus (own client), for performing group call outgoing to clients A and B, requests participation to group call from the client A. When the telephone apparatus receives a response from participation to group call from the client A, the telephone apparatus starts group call, as well as, requests participation to group call from the client B. When the telephone apparatus receives response of nonparticipation to group call from A, the apparatus stops solicitation of group call with respect to B. Consequently, the group call can be implemented efficiently, and a state of using frittering time or communication resource can be avoided. COPYRIGHT: (C)2008,JPO&INPIT
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