I have an IBM 600E laptop. My dial-up networking works
with some phone lines and not others. I believe that
all my properties are set up correctly (my ISP is NetZero).
If I use a phone line that "works", everything works just
fine. When I use a phone line that is a problem, the
modem calls the number, you can hear the ISP answer,
the typical noises go back and forth. The connection
is never actually made, even after as much as five
minutes. It does seem to be related to the phone line.
I can repeatedly hook up on the "good" lines, and
repeatedly fail on the "bad" lines. Unfortunately,
one of the "bad" lines is my home line! To further
complicate matters, my desktop never has a problem
on the same line at home.