Hi,
I have some confusion on call transfer.
Assume ua0 calls ua1 (dialog1) and then calls ua2 (dialog2). Then ua0 puts
both calls on hold. Finally ua0 sends a REFER to ua2 on dialog 2. It
refers to ua1 and includes a valid replaces tag indicating dialog1.
After completion of the transfer, ua0 receives a BYE on dialog1. ua0 then
sends BYE on dialog2 to ua2 but gets a 481 response.
My understanding is that dialog2 was not terminated by the REFER even if it
has a REPLACES in it.
The last piece of the puzzle is that there is an asterisk server in the
middle of all this. Each of the ua's has the asterisk set as its outbound
proxy and all traffic goes thru the asterisk server. Most of the transfer
is actually done by the asterisk box redirecting the rtp stream by using
re-invite.
Thanks for any help and comments!!
Jack
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