| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a private branch electronic exchange capable of realizing a voice communication in compliance with the VoIP even when a gatekeeper apparatus is not available. <P>SOLUTION: Upon the receipt of an IP address of a call destination from a gatekeeper apparatus 10 for every call, a storage section 34 accommodated in an IP trunk 30 stores the IP address and a called number at that time and reflects a changed IP address on the received IP address when the called IP address is changed. When the gatekeeper apparatus 10 is not available, a caller terminal 21 acquires the IP address of a called terminal 11 on the basis of the called number from the storage section 34. A call access control means 35 makes a call access with the IP phone terminal 11 having the IP address in compliance with the H.323 via an H.323 control means 37 and a network interface 38 to realize a voice communication in compliance with the VoIP. <P>COPYRIGHT: (C)2004,JPO</p> |
