I am experiencing the same issue today, but by virtue to two different GV IPs: Backing Off: TCP connection to 108.177.112.125 and 74.125.126.125.
I removed and reconnected my Google account at least 15 times. At one point I noticed an entirely different window appear containing a message which gave me hope, but that was quickly dashed simply because this problem still persists:
Rather than purchase another year of support for the 110, I opted to purchase the 202, which have voice prioritization. I hope that it automatically comes with 1 year of support as I was not able to determine this at the time I made the purchase through Amazon.
Fortunately, shortly after making this post, I received a response back from ObiTalk. Here's what they said:
"Your OBi110 device is an End-of-Life (EOL) OBi model. Please read carefully:
http://blog.obihai.com/. Since your OBi110 device is no longer compliant to Google Voice security requirement and is no longer able to connect to GV. And yes, since you are getting OBi202, this model works with Google Voice."
I hope this helps other peeps out there.