Many users don't realize that faxing is a function that can only use analog
phone lines and analog fax modems. Accordingly, no fax software will
function with cable modems or DSL lines. With some DSL connections you can
obtain a DSL line filter suitable for connecting a standard analog voice
line to the DSL line and can then connect an analog fax modem to that line.
If you have no analog modem or phone line, you will need to use a fee based
Internet Fax Service. Several are listed here: http://www.savetz.com/fax/