I would agree. I'm probably missing something here, but it seems like increasing how *frequently* a re-registration is initiated would generate additional network traffic and server load. It would seem to me that the the relevant parameter is how *long* the device waits for re-registration to be acknowledged. The HT-502 has been set to 30 seconds of wait time (default), and I wonder if that was not enough time when the server load was heavy last week due to the hourly backups. Just a thought.