If I find an active support site, I'll add it. MaxTech Corporation MaxTech and GVCs. Curt's High Speed Modems FAQ Very good place to look for modem info. Modem Initialization Strings Mwave at Watson - An unofficial page. Have found these mostly in IBM Thinkpads.
Successful connections require strange sacrifices to even stranger deities.
My choice would have been an RPI modem. But heh, whatever helps you get that tech angst out . . . . There's a good unofficial Zoltrix page in this set of pages too. Unix Serial Port Resources Page Browse ADSA's ADSL Forum for tutorials to both ADSL and VDSL Technologies. A little support for the harried helpers.