Have you thought about eFax (www.efax.com)? All your faxes arrive in your in-box as pdf files so you can retrieve them where ever you are. I got eFax several years ago and haven't had a fax machine in my home office since. For outgoing faxes, you can just tag the file(s) you want faxed and off they go. If I need to fax a paper document, I scan it first on my combo printer/scanner/copier.