CAX80 poor network status and sometimes network dropped

Thanks Plemans, My gateway is connected directly to the coaxial cable coming from the box outside my building and I don't have any amplifiers, signal attenuators, or splitters from the coax. I've had RCN come out and check the line from outside up to my gateway and they cannot find any issues with the line (of course they are not well trained). I'm really stumped as to what the issue could be. Any other ideas or tests I can run?