| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a technology which can establish priority communication reliably with the terminal of an optional partner based on the input of trigger information from a terminal on the call origination side. <P>SOLUTION: In an IP telephone system having terminals and a server 2 which processes the requests from the terminals, and transmitting and receiving data among a plurality of terminals over a network, a terminal 3A sets priority communication identification information indicating priority communication in the INVITE which requests establishment of session with the other terminal 3B when the trigger information relating to the start of priority communication is detected. A repeater existing between the terminal 3 and the server 2 on the network transmits a packet to the INVITE in which the priority communication identification information is set while attaching control information for decreasing the probability of cancellation even in the congestion state. <P>COPYRIGHT: (C)2010,JPO&INPIT</p> |
