Dial-up Networking

Windows 95 older version
33.6K internal modem
Iffy telephone line.
V90 comaptible ISPs.
On a good telephone line, I can connect to either of the 2 ISP I use.
On the iffy telephone line, trying to connect to the Internet yields the following message:
“The server you are dialing to is not responding. Try again later”
I cranked up the modem speaker to maximum. I can’t hear it dialing.
Same iffy telephone line works fine with 56K modem, or with Hyoerterminal

Any suggestions?

gemailhiot