Hi all. I'm trying to design a dialplan (in python) with some audible feedback for users. It occurred to me that it would be nice if I use instant_ringback and then could change the ring-back once one of multiple destinations sends a 180. I know that I can do it where if the remote sends 183 and ring-back, it will "take-over", but in this case, my callee won't generate ringback. An alternative would be to do it the other way around, I bridge to two destinations and one destination 1 hangs up with SUBSCRIBER_ABSENT for example, I could change the ring-back. I cannot however find anyway to do this in documentation or hints on forums etc. I supposed the basic question here is, Is there anyway to know what is happening, or indeed prepare for such events before calling bridge? Many thanks!! Keith.