Hello list,

 I wonder if someone could give me a hint on how I go about working out when applications can be used after bridging A & B legs?

I have spent a fair amount of time googling the list, but not yet stumbled into how it is determined if an application can be invoked mid call.  Some can and some can’t but I have yet to work out the logic that decides this?

The application in question is “drop_dtmf” but the question is more general. Also how does one work out if it should work with SIP-Info instead of 2833?

Thanks

Magnus