摘要 |
<p><P>PROBLEM TO BE SOLVED: To substitute a media gateway controller (MGC) without operating any element other than an IP telephone system and without disconnecting a call connected. <P>SOLUTION: An MGC of a substitution source and other network elements are accommodated so as to configure a call control network, an MGC of a substitution destination is connected to a network device that switches packets so as to allow information to be only monitored, and the MGC of the substitution destination collects and holds information being exchanged during operation, by the MGC of the substitution source. The MGC of the substitution source and the network elements are disconnected, connection of the MGC of the substitution destination to the call control network via the network elements is then enabled, and the MGC of the substitution destination starts operating while utilizing the held information. <P>COPYRIGHT: (C)2009,JPO&INPIT</p> |