I am usnig google voice with asterisk 11.2 and I fin myself needeing to restart asterisk evry few hours. If I don’t restart asterisk box I aqm unable to recive calls. I can make then but no one can hear me ist ther patch that will allow asterisk to work all the time with google voice.
You may have to make sure that you are not signed into your Google Voice account with another application. I have had FreePbx and Asterisk running for several weeks using three GV accounts and have not had any problems. However it did take me several tries to get everything installed and configured properly.
What ports do you have open on your firewall? I am running pfsense 2.1 and it seems that I have open most recomended ports. I saw that is recomended to open up from 5000 to 5082