| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a provision method of IP (Internet protocol) call service of which the use for positively extending a hoop of communication is enabled by utilizing an IP telephone. <P>SOLUTION: A call group in which multi-call by a plurality of IP telephone terminals 3 is enabled is generated according to a primary call request from an IP telephone terminal 3, the generated call group is registered by imparting a group ID to it, exchange and control are performed so that the multi-call by the IP call terminals 3 belonging to the call group is enabled, the registered call group is opened so that it can be browsed by the IP telephone terminals 3 which can be connected via each base station 2 and the multi-call is enabled by making an IP telephone terminal 3 which performs a secondary call request by defining the opened call group as a destination participate in the call group according to the secondary call request from the IP telephone terminal 3. <P>COPYRIGHT: (C)2004,JPO</p> |
