I've had this setup for a while with CC for caller ID and just recently I've noticed many calls going to voicemail and not ringing at all. I placed a few cell phone calls to verify this. Sometimes it works, sometimes not.
While testing, I noticed a real outside call went to voicemail and they left a message.
Any ideas on how to solve this? It's intermittent.
See this thread. Issue appears to be a Google Voice issue. No indication that they are working on resolving it yet. There are some work arounds.
http://www.obitalk.com/forum/index.php?topic=6922.msg44322#new (http://www.obitalk.com/forum/index.php?topic=6922.msg44322#new)