Well I've fought the good fight, but just could not put up with all of the constant Google Voice issues. Dropped calls at randomly varying times, the "service provider could not be reached, etc. I spent countless hours trying to resolve, reading both Obi and G V forums. Tried rebooting, deleting account and restoring, factory reset, router settings. Finally reached the conclusion that it is a GV issue, but there is no ownership of the problem. They don't seem to care about Obi support (there is no money to be made).
So I ported out of GV into Anveo. Pretty much instantly, all the problems went away. Having a phone that does not work reasonably reliably just makes no sense. Have had multi hour telecoms with no drops with everyone in house doing remote work. Anveo has an offesively primative website, but gets the job done. The Google integration with GV was nice, but not worth the headache. Was already using Anveo for 911, so it just a few more bucks for basic service. So far, worth the cost difference.