| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a VoIP-based conferencing system which readily handles different protocols, load-balances media resources and deals with fail-over situations. <P>SOLUTION: The VOIP conferencing system has a gateway coupled to the PSTN (Public Switched Telephone Network). A Voice Server Director (VSD) is coupled to the gateway and performs a control function of the conferencing system. The VSD has a back-to-back user agent. The VSD controls a media server, which mixes the audio (signals), and the media server receives the data portion of a conference call from the gateway. The media server is coupled to a bridge that controls an on-going conference. <P>COPYRIGHT: (C)2013,JPO&INPIT |
