Take a look into the call flow and then you will find out when you have to drop the dialog after send the REFER.
From: ext isshed [mailto:[email protected]] Sent: Tuesday, April 26, 2011 12:58 PM To: Pavesi, Valdemar (NSN - US/Irving) Cc: Worley, Dale R (Dale); sip-implementors Subject: Re: [Sip-implementors] Call Transfer Using REFER thanks for your response Pavesi..but my question was not about the type of call transfer. should i rephrase my doubts? On Tue, Apr 26, 2011 at 10:52 PM, Pavesi, Valdemar (NSN - US/Irving) <[email protected]> wrote: Hello, There are two type of call transfer. A) call transfer attended http://www.tech-invite.com/Ti-sip-service-05.html b) call transfer unattended http://www.tech-invite.com/Ti-sip-service-04.html Regards! Valdemar -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of ext isshed Sent: Tuesday, April 26, 2011 12:10 PM To: Worley, Dale R (Dale) Cc: sip-implementors Subject: Re: [Sip-implementors] Call Transfer Using REFER Thanks Dale for your response. so the other doubt is what will happed to this dialog when the call gets transferred. does it not get destroyed with the BYE? if so what about the rest of the notify? I know I am asking the basics but it will improve my understanding. Thanks. On Tue, Apr 26, 2011 at 8:55 PM, Worley, Dale R (Dale) <[email protected]>wrote: > Although it is not mentioned in any of the RFCs, the universal way of using > REFER for call transfer is to send the REFER within the dialog that you are > transferring, the dialog that was created by the initial INVITE. "Out of > dialog REFER" is rarely used for call transfer. > > It is very uncommon to have a subscription and an "INVITE dialog usage" > (that is, phone call) within the same dialog -- with the exception of the > subscription that is created by a REFER within the INVITE dialog usage. > > Dale > _______________________________________________ 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
