It can just stop working of its own accord I don't have to be using usenet for it to happen. This happened this afternoon so I uninstalled the NIC drivers & then reinstalled them but that made no difference until I rebooted. Also tonight when it happened I flashed the routers firmware to default settings, but once again I could access the admin page on the router til I rebooted.

What I noticed is that it seems to start with http not functioning then usnet & finally voip. When I reboot all are functioning again