I just got FiOS a month ago or so. I frequently get a blinking red FAIL light on my ONT, and when that happens I have no TV, no phone, and no internet. To"fix" it I have to disconnect my battery backup unit, power off the ONT, wait a few seconds, then reconnect the battery and power the ONT on again. About two minutes later, everything's fine.
Normally (?) this seems to happen once every few days, but it seems like when I use my washer and dryer, it happens like once an hour or more. The ONT is in my basement, fairly close to the washer and dryer.
So, I thought maybe the washer and dryer are causing voltage fluctuations for the house current - they have big electrical motors that turn on and off. So I put a line filter on the ONT - no improvement. Then, I just unplugged the house current from the ONT and let it run off the battery backup - but it still fails frequently when the washer and dryer are on. So, I think this means the house current is not the problem.
Could the ONT be getting some sort of RF interference? This seems really weird!
By the way, the ONT is the 612A model. Any suggestions? Thanks.