Hey Red,
I have FIOS also, and lost my DSL, Telephone and T.V. for two days, due to the outside box going bad.
The repairman said this is happening all over, and that they don't know what's causing them to fail ?
I was back on 5 minutes after he arrived ! He just checked the box and replaced it with a new and improved version.
Now everything works better, even the T.V. is brighter, and the Internet runs faster !!!!
Your's may be going !
Bill