I've spent hours on the phone with tech support. The DVR has been replaced once already. The router has been factory reset several times. Tech support has remotely rebooted the DVR several times. I've disabled and re-enabled remote dvr on the set top box repeatedly.
No matter what I or the technical support team tries, I always get "Set-Top Box ... is not responding" when I try to access the DVR from the Verizon FIOS web site.
I've pretty much given up at this point.