I think you need to set ignore_early_media=false and bridge_early_media=true, which will pass the ringback tone from B leg to A leg.



On Tue, Nov 11, 2014 at 3:41 AM, kthofer <karl-theo_hofer@inteli-sim.com> wrote:
Hi there

please be gentle with me but i can not find any help in the wiki to
solve my problem
this is a desperat try to get some answers to the following problem
freeswitch is a configured as call back server
FS originates the A-leg when answered the B-leg is originated.
  after A-leg has answered I like to play a short welcome message
After the welcome mesage is played the international, original
ringbacktone (telco carrier RBT) from the B-leg shall be passed through
and the A-leg user should be able to hear it.
This is important to hear some carrier specific announcements or
coloured/personalized ring back.
Right now we play our own ringbacktone even though the carrier provides
us with a 183 sdp
I did play with  the usual Channel variables
but as far as I understood the passing through of the ringbacktone is
default behaviour.








--
With best regards
kT


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