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