I want to check if Asterisk supports passing UUI to an IVR via SIP messages in the following context.
A custom application tells Asterisk to make an outbound call to someone using AMI.
When the call is answered, Asterisk connects the person to an IVR. (So now the person is talking to the IVR.)
To be able to find corresponding calls initiated from the application on the IVR side,
the application would attach a UUID to each outbound call and the UUID is expected to pass to the IVR via SIP messages.