| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To prevent a loop of call request (SIP message). <P>SOLUTION: A SIP (Session Initiation Protocol) server as one embodiment of the invention comprises a reception means for receiving a first call request from a SIP enabled apparatus, an inspection means for inspecting whether a predetermined flag is contained in the first call request or not, a call request generation means for generating a new second call request from the first call request when the predetermined flag is not contained in the first call request, a flag insertion means for inserting the predetermined flag in the second call request, a call request transmission means for transmitting the second call request to the SIP enabled apparatus specified by the first call request, and an error message reply means for returning an error message to the SIP enabled apparatus, a sender of the first call request, when the predetermined flag is contained in the first call request. <P>COPYRIGHT: (C)2008,JPO&INPIT</p> |
