atcomsystems.ca/forum Forums TDM Business Telephone Systems Inter-Tel Telephones & Systems 8602 IP softphone

That will definitely cause it not to work

Well, that didn't fix it. I have a call in to our vendor to see if they can help figure this out. What a pain.

And here's another problem... now when we connect the 8602 via the VPN and make any sort of voice call, either IC or outgoing, we get a system alarm for insufficient bandwidth for that extension. Any ideas why that would be hapening now when it previously didn't happen?

That alarm is generated whenever network performance drops below a certain level.
The Average In Time Frame Percentage Threshold and Average In Time Frame Timer fields indicate when network characteristics inhibit voice connections. When the average number of In Time frames falls below the Average In Time Frame Percentage Threshold, and the average number of In Time frames stays below that threshold for the time given by the Average In Time Frame Timer (in seconds), the system displays a warning about insufficient bandwidth.

I too am experiencing problems with my 8602 softphone on a Inter-Tel 5000 system. It works fine inside the network but when I NAT the ports on the firewall listed above I can make and receive calls but have no Audio. I even tried pointing ports 1-65000 to the local address and it still did not work.