reply to Kmfrnidvmi
Re: Inconsistent, unreliable internet service (Help needed) Thanks for the suggestion, I'll look into that. One thing that surprises me is that the original person who came to set up the service claimed they ran a new line from pole to modem (his words).
I never bothered to confirm until late last night, and the reality is the line going to the modem is connected to some crusty line in the house (painted over, etc.) that runs directly alongside a 120v line (not in a conduit, but open, and sitting on the block wall in the basement).
I'm wondering if that could be the issue, but to suddenly crop up with the snow that melted doesn't make me think so. Still, a visit is probably more in order, and if Dan can confirm something as well, that will be all the more helpful.
If its in the house you can just replace it your self. Just to test, go to where the cable comes in the house, hook up the modem right to that line before any splitters, see what signal is like there.