My Push To Talk (Voip) button doesn’t work / Voice Issues
To test if your Voice connection works go here: http://vyew.com/browsertest.
If it doesn’t work there, you may have a firewall on your computer or network which is blocking the connection. You need to have these ports opened up for all outgoing connections: 9100, 9102 and 1935.
If you’re having quality issues with the Voip system, it is most likely due to bandwidth problems on you or one of your participants connections.
Another option to try is Skype (www.skype.com).