I had my UPS fail last night - my local network was down, GS286 lost power as well as DSL modem and router. I restarted everything without the UPS and all came back up except for the GS286. Used Wireshark to take a look and it appeared the GS286 was hung up on trying to get STUN to bind. It had a static IP address on my local network, I repower it several time, no help. I then reconfigured the GS286 for a dynamic IP and it immediately registered and is operational. Not sure what is happening, as some time ago the same happened when the GS286 was configured with a dynamic IP and setting it to static allowed it to become active.