It's expensive. Here's the first tester I found ->

That's some used unit but at this price is a steal.

Let me share the methods I use.

1. At 3 days I would have used System Restore to 4 days ago.
2. After all those updates I couldn't use idea 1 and would restore the machine to its factory install.
3. If ideas 1 and 2 fail I try one of those USB Analog Modems.
4. If ideas 1 2, and 3 fail I try it on another phone line in another home.
5. If ideas 1,2,3, and 4 fail I try another dial up provider.

Dial up support is notoriously bad.