Well, add another gripe. This AM I got a call to my cell (direct) from family that can't get to me through GV or the Vestalink number. Turns out, if someone calls my GV number, my cell phone rings once, and then "missed call". In the mean time, the caller hears one ring, then:
Quote"Nobody is available to take your call at the moment. You cannot reply to this message because the sender does not have a mailbox".
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This, despite having VM turned off, and ring set to 90 seconds on Vestlink's interface. Man is this frustrating.
ETA: Turns out this was self-inflicted. I followed the "Beta" link, and enabled "beta" on the web gui - though I didn't actually change the OBi proxy, user, URI, etc settings. I turned it off after reading some of the trouble tickets. Apparently, that didn't turn it off. I just double checked, and beta was still "on". After hitting "off" again, the problem resolved. I can now receive calls.