REFER is an end-2-end feature. Thus, After ua1 sends REFER to ua2 (Refer-To: ua3), ua2 will create a new INVITE to ua3. You can not intercept the REFER in the SIP proxy and create an INVITE.

The only thing you might want to do in the proxy is to screen the URI in the Refer-To - e.g. to avoid that your subscribers are referred to costly service numbers.

regards
klaus

Frogger wrote:
I am trying to handle the REFER method for
call-transfer and I need some assistance.

What is the openser.cfg structure to handle a refer
from ua1 to ua2 so that ua2 can call ua3?

Basically, I am trying to establish a new INVITE with
the REFER-To for ua2 calling ua3.  Also, I need to
clean up the initial transaction between ua1 and ua2.

BTW, I read the rfc on REFER and I have a good sense
of whats supposed to happen but I lack the mechanics
to make it so.

All the guidance will be very helpful.  Thanks, F

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