I see others have this problem with other RUT devices but no solutions have been given. This is a new RUT240, latest firmware update, in the factory case. Every 8-30 hours it will randomly reset itself to factory default settings, requiring a site visit to again reconfigure it. It seems to stay on, but just reverts back to default settings, which disconnects all the connected devices. There has been no power outages, and no network outages to my knowledge.
It's done this on my desk and on the windowsill in another room.