Patent ID: 8458253

Claim:
A method for establishing a conference call, comprising: sending a first SIP INVITE message from a Media Gateway to an Application Server; associating a request with Media Server resources at the Application Server; sending a second SIP INVITE message to a first Media Server based on the associating; establishing a Real Time Transport Protocol (RTP) session between the Media Gateway and the first Media Server; gathering entered data at the first Media Server; sending the gathered data to the Application Server; sending a third SIP INVITE message from the Application Server to a Conference Controller based on the gathered data; allocating resources related to the conference call by the Conference Controller on a second Media Server; requesting by the Conference Controller for the Application Server to move data related to establishing the conference call from the first Media Server to the second Media Server; sending a fourth SIP INVITE message by the Application Server to the second Media Server and sending a SIP RE-INVITE message by the Application Server to the Media Gateway; receiving an acknowledgement by the Application Sever that the second Media Server and the Media Gateway are ready to establish the conference call; and establishing an RTP session between the Media Gateway and the second Media Server thereby establishing the conference call, wherein one or both of the Media Gateway and the Application Server are configured to mix all conferencing legs leaving an enterprise; after establishing the RTP session between the Media Gateway and the first Media Server, sending a PROMPT AND COLLECT message from the Application Server to the first Media Server to gather entered data by a Caller at the Media Gateway to establish the conference.