ATA reboot after power outage

[apl]

I think it has always worked when only the router is rebooted (or when only the ATA is rebooted).
The failure case is when both lose power simultaneously, and the ATA reboots before the router.

[klui]

Not true based on my experience roughly 3 months ago. From first page of this thread under my name.

(resold ATT fiber). Modem got a FW update and the modem rebooted. ATA was still on. I had forgotten about the update and went to bed and forgot to reboot the ATA. When I woke up 7-8 hours later the ATA was still unregistered. A manual reboot using ***999 got it registered again.