Hello All, I want to implement call transfer feature on a user agent. As you all know it can be done in 2 way. 1. sending REFER out of dialog and 2. sending REFER in dialog. As rfc 3515 says "
A REFER request MAY be placed outside the scope of a dialog created with an INVITE. " Also as per RFC 3515 " A REFER request implicitly establishes a subscription to the refer event. " My first doubt is if REFER is outside of the dialog created by INVITE can it be in a dialog created by SUBSCRIBE. Or in this case there will be 3 dialogs? My second doubt is if REFER is inside the dialog created by INVITE can it be in a dialog created by SUBSCRIBE too. Or in this case there will be 2 dialogs(1 for invite and 1 for subscribe)? Can you all please help me understand this? Thanks, _______________________________________________ Sip-implementors mailing list [email protected] https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors
