Features DUN error fixes, line noise information, init string database, forums, and more.
http://www.modemhelp.net/
Directory of modem related information, support forums and daily news.
http://www.modemhelp.com/
Features information on chipsets, open source drivers, and software for Linux.
http://www.linmodems.org/
Features information about buying and upgrading to 56k modems.
http://www.56k.com/