My Obi110 has been working fine for a few weeks with my google voice number. Suddenly I cannot receive calls. The caller gets the message "service for the # u dialed has not been established". If I disconnect my Obi then my google voice number works properly. I have updated my firmware today, after this problem started, and I have cycled the power on my Obi, but the problem persists.
When someone calls, although they get that error message, my phone tells me I missed a call, but it doesn't ring and the caller is unable to leave a message.
So it seems that the error message originates from my Obi, after the call has been received by the Obi, and after the Obi has sent a signal to my phone.