I didn't see where you acknowledged that you powered off, and then on, the entire setup - cable modem, router, OBi. I see where you tried some power off, but that could have just been the OBi. If you haven't, power all off. Cable modem on, wait 3 minutes. Router on, wait 3 minutes. OBi on, wait 3 minutes.
Now - pick up your home phone and try to call your cell (of course make sure it's on).
If that doesn't work, now go to your computer and using Google Voice, have it ring your home phone and call your cell. If that doesn't work, have it ring your cell and use that to call anything.
If you can use the computer to ring your cell and make a call, then GV is fine.
If GV can't make the house phone ring, but you made a call off your cell with it, then it's an OBi issue.
At that point, go to
www.obihai.com and click on Support, and fill out a ticket.