Thank you Robin, we are under a Virgin Media broadband business service. What's weird is that since Virgin took over UPC in Ireland they changed modems and routers (you're right the Hitron is probably a router). Here's a screenshot of our other premises using an MR18 connected to the old Cisco UPC routers (now controlled by Virgin) and there's not a single interruption in the connectivity for a month:   I'll check all the advice given in that link to see if I can get any better.   ... View more