Using common off-the-shelf hardware and a few free/open source
applications you can build a reliable Fax Server for your institution.
Besides the convenience of having a Fax Server, you will be glad to have
the added ability to transform your faxes to/from .pdf files and route
them by email, or print them at inexpensive printers.
Take a look at the step-by-step howto manual at:
http://www.howtoforge.com/linux_hylafax_server