Two computers with Express Talk installed and configured to connect to Axon on public IP
Both can call each other and talk / hear correctly
Intercom between them also works
Conferencing in a 3rd extension WORKS
Hold / Transfer both disconnect in exactly 6 seconds
Tried with and without Music on hold server - same result
Tried with default and different on-hold ringtone - same result
In either case, caller being placed on hold (or transferred) hears nothing for 6 seconds, then disconnected.
Any ideas?