On Sun, 18 May 2014 21:42:58 -0500, Paul in Houston TX
wrote:

Anyone know of an analog dialup modem phone number
that I can use for line testing?
United States

Years ago, some libraries still had BBSs. You could call their number
and get their catalog of books. This was after the internet began. I
dont know if this still works.

Also, therei s a newsgroup which lists private BBSs. I guess a few of
them still exist.

try alt.bbs