Netgear CM1200 Modem Drop outs

 We have our own Netgear CM1200 Nighthawk modem. The internet has been randomly dropping out for over 3 or so years. I had several techs stop out and replace the cable to try and help and it doesn't correct the problem permanently. I started having this problem when I had a Netgear CM500 modem and then I switched it to the Netgear Nighthawk CM1200 thinking this would correct it and it hasn't. The firmware is up to date on the modem, but I am still receiving several errors a day from my modem when you log into it. I need advanced tech support to help me figure this out. I keep reading online and other people have had the same problem and it always seems to go back to the ISP wiring has an issue.

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