Shale -- I am thinking that too...
I got a response from OBihai Support (who apparently either got the support webform from me despite the webpage not responding or read this forum). Appreciated their response.
They suggested trying a different 12 volt adapter -- which I did. This seemed to work at first (confusing since I had tried this earlier... this is a 3rd 12 volt adapter I tried).
Okay... so with a different 12 volt adapter I called the configuration menu at ***, restored the factory reset again, tried to update firmware (said none available), called echo talk number **9222222222 (worked), and then added back to OBiTALK, and reconfigured for Google Voice.
Immediately upon configuring with Google Voice (supposedly successfully) the phone line when dead again.
So now I don't know whether:
a. It's something weird with Google Voice, or
b. The OBi202 unit magically decided to work again for a bit, its really got nothing to do with 12 volt adapters, then it died again, and I really should return this thing for another unit.
I feel a bit like it is teasing me.