Intel Customer Support -- my little 14.4 external (which proved a real trooper in a recent pinch--I wish I could breed it with one of my 56Ks) still finds documentation here although Intel has long been out of the modem biz.
Welcome to Logicode has vanished, but I know there must be
a gazillion Logitech Quicktel modems out there since they were sold
on America Online. If I find an active support site, I'll add it.
Mwave at Watson -
An unofficial page. Have found these mostly in IBM Thinkpads. Successful connections require strange sacrifices to even stranger deities.
Sportster to Good Use
Cars and TVs have elicited this kind of love/hate reaction from 20th century folk for a few decades--now patience as a virtual virtue bangs into the limits of online frustration. My choice would have been an RPI modem. But heh, whatever helps you get that tech angst out . . . .