Happens here all too often, usually a reboot of router fixes it, but every so often , we have to ring them, they have re sent a signal several times to our router, and after that, it works great for about a week, but overall we probably get disruption a few times a day every 2 or 3 days. Every time it plays up, I then check my vpn on my E2 box, after it settles back down, thats if I havent done a reboot, and every time, its turned off, as before it had been on, could be the loss of internet connection doing that, but not sure, whenever we have had to phone them up, they always ask what devices are connected to the router.