Hi Kishore, To terminate a early dialog you can send both cancel and bye requests,since a cancel request can be sent because we already received a provisional response and a BYE can be sent as pointed by Inaki because the dialog identifiers are present,since the to tag is present in the UAS reply,now why will we send a bye instead of a cancel,as an answer to that I could like to refer a very old post,which will clear everything.
https://lists.cs.columbia.edu/pipermail/sip-implementors/2000-October/000214.html Inaki, Do you think cancel or bye which will be a better response to terminate a early dialog? Thanks and regards, Shamik Saha Project Engineer Voice Protocols Cell : +91-9886704155 -----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 caller's UA MAY send a BYE for eitherconfirmed or early dialogs, and the callee's 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 Please do not print this email unless it is absolutely necessary. The information contained in this electronic message and any attachments to this message are intended for the exclusive use of the addressee(s) and may contain proprietary, confidential or privileged information. If you are not the intended recipient, you should not disseminate, distribute or copy this e-mail. Please notify the sender immediately and destroy all copies of this message and any attachments. WARNING: Computer viruses can be transmitted via email. The recipient should check this email and any attachments for the presence of viruses. The company accepts no liability for any damage caused by any virus transmitted by this email. www.wipro.com _______________________________________________ Sip-implementors mailing list [email protected] https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors
