There is a problem with my Unity. Some of the voice messages are just 'hung up' tone, and up to more than 5 mins (or the max voice msg length). It seems that the Unity is unable to detect the call has 'hung up' and keep on recording the v msg.
I have a similar problem. When receive a call from outside our network, get dead air when the Unity greeting is supposed to play. We have Unity 4.0(4).
Have you confirmed the call is reaching Unity? If using CallManager integration, you can run Call Viewer or if non-CallManager, run Integration Manager from your Unity server to see calls coming in from your PBX. In your example, when a call comes in offnet, does the problem occur when the caller rings a subscriber phone and rolls to voicemail coverage? Or is the caller calling the remote Unity access number and not getting the Opening greeting?
When 1 party of a call has hung up/terminiated the phone, the tone that the other party hears after the hung up. It is strange that some of the v msg are "dooooo-dooooo-dooooo-dooooo" and so on (for 300 seconds; default voice message length).
whereas for other v msg, it records up till the calling party hangs/terminates the call.