Sending Fax From OSX Mac Computer To Fax Machine

You need either a fax service or a dial-up modem.

If you have a modem, you still need to call the fax machine. You cannot just connect a phone line between the modem and the fax machine.

RELATED QUESTION and request for help -

To folks here...
Hey folks, I have an Apple fax related question nobody has responded to yet and I would really really appreciate some help and guidance. Maybe y'all are here and just haven't spotted it so apologies for posting here as well but here is my dilemma/predicament/problem:
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When I type in the phone number to fax TO in the "FaxPDF" box that comes up, the field begins to automatically populate with entries it thinks I'm about to type but when I highlight the text in there and type over it to put in another phone number, after I hit RETURN, it will repopulate the field starting with the entry it keeps thinking I'm trying to type and then after that it leaves some of the string of characters I typed originally. This is really annoying. It's as if the interface is determined to convince me that it knows to whom I want to fax even when I've already essentially told the thing that it was wrong and turned around and typed in the correct info.

Solution? Is there a buffer I need to clear out to get this working properly again?

Somebody somewhere else not on this forum suggested I try DISabling the iSyncing of my Apple addressbook (which I'd rather not do since then it won't sync with my iPhone and/or Treo). So - what do you think?