| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a calling control method, a system apparatus and a program enabling a high-order application to exchange calling-related information, such as media information, without being conscious of the calling state of a calling control protocol. <P>SOLUTION: A characterized configuration is employed in which a transmission side SIP stack 12 of a transmission side node 1 is provided with a superimposed message transmission processing unit 3a for receiving media information notified from a transmission side high-order application 11, superimposing it on an INVITE message (connection request message), and transmitting the INVITE message toward an incoming call side node 2; a media information notification processing unit 4a for extracting the corresponding media information from a 200OK message (response message), and notifying the application 11 of the media information; and a media status transition processing unit 5a for generating and erasing the media status indicating the reception of the media information. <P>COPYRIGHT: (C)2005,JPO&NCIPI</p> |
