I had a similar problem with my provider, COX cable in Fairfax County, VA. Sometimes I would have no WAN signal at all, it was an intermittent problem. First they told me over the phone after "checking their circuits" and seeing a lot of dropped carrier and modem resets, to get a new cable modem, I did - still had the problem. Then they sent a tech out, he left me a new test modem which they monitored - still had the problem. So, then they sent out a crew, dug up the yard and put in a new, waterproof cable line - that worked fine for about 1 year. Then problem recurred - lost WAN intermittently, slow access, etc. This time, during the discussion, the COX techs told me they had just upgraded the switch I was on - I suggested either there is somebody with heavy volume hogging the switch - it would bog down or drop me everyday around the same time of day - or they must have a bad circuit on their switch, to which they said, maybe we do - so I asked them to remedy the situation or I'd drop their service - but they never fixed it, so I cancelled the HS Internet and got a dedicated DSL service which although in theory was slower than cable, in reality, because it was a dedicated DSL, I had better throughput overall. Now that FiOS has come to my neighborhood, I have dropped all COX cable service and discontinued the DSL. So far, so good - reliable, better through-put and with bundle deal, cheaper overall. Some people in some areas report problems with FiOS, but I have no complaints- yet. BTW, I have an MS in Computers and Electrical Engineering and a law degree. Be skeptical of what your provder tells you - insist they fix it, it's what you pay for, and if they can't fix it and you have an alternative, cancel them!