I have the 7960 set up on a VPN which other applications use. There seems to be no conflict with other system applications.
After the initial configuration, calls can be received and made successfully for about 3-5 minutes and then nothing connects.
Outbound calls have fast "busy" signal after about 30 seconds of nothing.
In-bound calls will not successfully pick up the incoming line.
Calls to other extensions and the voice mail system end with a fast "busy" signal.
I am using a DSL filter on the incoming IP line and have tried removing with no luck.
Thank you for your help.