I am new to Asterisk and am testing a setup to replace international calling between our locations with calls over our VPN network.
One system is a Core 2 Due 2.4GHZ system running Ubuntu 9.04, the other is a VMWare Virtual Machine running Ubuntu 9.04. Both systems have 4 GB RAM assigned.
So far I have configured 2 asterisk systems, connected via IAX2. Calls are routing fine and call quality is perfect between the systems.
The issue I have run into is that when a call rolls to voicemail on the remote server, the voice is broken up and you cannot tell what it is saying. When I roll to voicemail on that system it plays just fine - it’s only when it is traversing the IAX trunk that I have the issue.
I am not sure where to go to diagnose the issue since it can only be duplicated when calling across the trunk.
Currently both systems are on the same Gigabit switch and same subnet.
Can anyone give me ideas of where to locate the root cause?