ActiveWin.com      
This site contains different Windows Tips

808news.com     
This site contains technical support for modems and information on how to establish a reliable Internet connection.

ModemHelp.Org   
This site is a Drivers for modems.

56k.com   
This site contains several topics concerning modems. (advice, troubleshooting,  int strings, manufactures lists)

WinFiles.com     
This site contains several topics concerning Windows (Drivers, Technical Help, Tips & Tricks etc).