In order to use the fax feature in WebShuttle, you will need to have a fax account with some online faxing service such as MyFax.com. Faxing from WebShuttle is basically like sending an email. If you use MyFax.com, you simply send an email using the following format:
To: (recipient's phone)@myfax.com
From: (your email address)
For more details, see http://www.myfax.com/faqs.asp?bt=p
The WebShuttle email page will generate the email for you and attach the document you wish to fax.