One use case is, downstream proxy forks INV and caller would receive multiple 18x response from different callee. Further on receipt of one 2xx response form either of the callee, the other early dialog need to be terminated. In this case, BYE is the appropriate message to be used.
**************************************************************************** *********** This e-mail and attachments contain confidential information from HUAWEI, which is intended only for the person or entity whose address is listed above. Any use of the information contained herein in any way (including, but not limited to, total or partial disclosure, reproduction, or dissemination) by persons other than the intended recipient's) is prohibited. If you receive this e-mail in error, please notify the sender by phone or email immediately and delete it! -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of kishore sowdi Sent: Thursday, May 14, 2009 12:51 PM To: [email protected] Subject: [Sip-implementors] How In early dialog state can UAC send BYE? Hi, Section 15 of RFC 3261 says - "The callers UA MAY send a BYE for eitherconfirmed or early dialogs, and the callees UA MAY send a BYE onconfirmed dialogs, but MUST NOT send a BYE on early dialogs". Section 12.1 of RFC 3261 says - "A dialog established by a non-final response to a request is in the "early" state and it is called an early dialog". Section 9.1 of RFC 3261 says - "If no provisional response has been received, the CANCEL request MUST NOT be sent; rather, the client MUST wait for the arrival of aprovisional response before sending the request. If the original request has generated a final response, the CANCEL SHOULD NOT be sent, as it is an effective no-op, since CANCEL has no effect on requests that have already generated a final response". So , How In early dialog state can UAC send BYE? I want to know the used case when caller's UA will send a BYE for a early dailog case. Regards,Kishore Explore and discover exciting holidays and getaways with Yahoo! India Travel http://in.travel.yahoo.com/ _______________________________________________ Sip-implementors mailing list [email protected] https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors _______________________________________________ Sip-implementors mailing list [email protected] https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors
