Microsoft Word 2003 gives you two options for faxing documents. You can fax using your own fax modem, with either the fax software built into Windows or your own third-party software, such as WinFax Pro.
Alternatively, if you don't have a fax modem (or prefer not to use it), you can use an Internet-based fax service. With an Internet-based fax service, you email your file to a service provider via Microsoft Outlook. The Internet fax service handles the faxing on your behalf and charges you based on either a monthly subscription or per-page rate.
The following sections cover both.