The OBi202 with the codecs it has can apparently consume at most 128kbps (two ports running the G711 codecs, the default, at 64000 bps each.) While I would like download traffic for radio and TV to not suffer drop outs that isn't an issue here; there's next to no upload bandwidth requirement. Somewhere Obihai suggest that GV needs 100kbps, presumably per channel, but it's not clear why, and my preferred provider, voip.ms, is running the G711 codecs, so my conclusion is that the "restricted" setting is currently irrelevant.
I guess all I want to tell the 202 to do is to drop everything for the phone, and I suspect that is what it is doing since I've got perfectly good calls (US and international) since I moved the OBi to be my gateway and stopped using GV. (The GV problem seems to be dropouts, probably because the GV server is to far away; I selected a voip.ms server by pinging each possible server and selecting Seattle, which had an 80ms ping, 40ms better than the next candidate.)
John Bowler <firstname.lastname@example.org