Recommended software for sending faxes

What software do folks recommend for sending faxes? I don't need to receive them. I'm running KDE and SuSE 10.0. I actually have two modems: an external USR one, which I'd prefer not to use if I don't have to, and an internal PCTel one, which I have yet to get working properly (see my other thread). And on the same subject: what do I need to do to set up the modem for this function? The Yast facility for configuring a modem seems to assume that the modem is being used to contact an ISP, which is not the case in my situation. Paul