Thanks for the suggestions. Before I downgraded the FW, I tried using my old trusty Obi100 to make sure the problem wasn't on the Anveo side. Sure enough, the 100 worked perfectly with messages. So with that variable eliminated, I turned off all auto provisioning and downgraded the 200's FW as suggested to 5859EX. I manually entered the Message URI in both places and changed the subscription timeout to 60 seconds. Rebooted and called the land line with my cell phone. Surprise -- the 200 now works again (and Anveo is now showing a MW subscription unlike before). So, obviously there must be a FW problem. I would like to have Obi know about this but don't want to pay the $10 fee.
Again, thanks all, it seems to be back to normal......
P.