Hi Srikant, In the siping-service-examples-05.txt draft 'UnAttended Call Transfer' is achieved using REFER within the dialog but without using a 'replaces' header. How does the 'Transferee' in this case know that it has to transfer the Call (Dialog) in which the REFER came..? Why 'replaces' header is not used here.
Thanks, -Badri -----Original Message----- From: Srikanth Sundaragopalan [mailto:[EMAIL PROTECTED] Sent: Monday, July 12, 2004 7:50 PM To: Badri Srinivasan Sampath kumar - NPD, Chennai Cc: [EMAIL PROTECTED] Subject: Re: [Sip-implementors] REFER Semantics... The REFER method within a dialog doesnot affect the existing dialog in any manner,unless you have a replaces header in there,which forces the end point receiving the REFER to terminate the dialog identified in the replaces header. Both end points are free to keep/close the dialog after the refer transaction completes. regds srikanth!! On Mon, 12 Jul 2004 18:40:59 +0530, Badri Srinivasan Sampath kumar - NPD, Chennai <[EMAIL PROTECTED]> wrote: > Hi All, > > How does a REFER within a dialog and a REFER outside a dialog differ. > > A REFER from endpointA to epB triggers the epB to sends a SIP method > (specified in the REFER) to the ep identified by the refer-to URI. > If this REFER is within an existing dialog between epA and epb & if the > method is INVITE, > Can it be assumed that the call between epA & epB is transferred to epC. Or > does it just trigger > the epB to initiate a new Call to epC..? How is this related to the existing > call between > epA & epB. If only we use a replaces header in the REFER, does it transfer > the existing call betwen epA and epB...? > > Thanks, > -Badri > > Badri Srinivasan S > Networking Technology Labs, > HCL Technologies. > No.64 - 66, South Phase, IInd Main Road, > Ambattur Industrial Estate, Ambattur, > Chennai - 600 058, Tamil Nadu, India. > Phone: +91 044-26521077/1270, 26250169/9450. > Fax: +91 044-52060485 > > visit us @ http://www.hcltechnologies.com/voip > _______________________________________________ > Sip-implementors mailing list > [EMAIL PROTECTED] > http://lists.cs.columbia.edu/mailman/listinfo/sip-implementors > -- Srikanth Sundaragopalan MS,Computer Science Georgia Institute of Technology,Atlanta _______________________________________________ Sip-implementors mailing list [EMAIL PROTECTED] http://lists.cs.columbia.edu/mailman/listinfo/sip-implementors
