Got a call around 11:30 that worked just fine (but is interestingly NOT in the call log on the OBi). Someone tried to call at 12:00, 3 times, and could not get through. Didn't leave a voicemail. I tried to call them, got the blah, blah 503 message.
Rebooted OBi, no change. Shows Connected on both GV numbers.
Got on the PC, tried to have GV call make the call through my house phone, nope. Nor my cell. So it's clearly a GV problem, has nothing to do with the OBi it appears.