A little technician's insight- That's the beauty of the TIA/EIA 568 design. Feed your lines to a patch panel, and use standard patch cords to feed them to standard jack locations. User friendly.
However, if your infrastructure has been comprimised by a contractor that believes in "2 pair per network connection", splitting pairs off one cable to provide another connection, you may need a technician to sort it out.
As a rule, if you've got 4 pair (8 wires)punched down on the back of your patch panel, you'll be ok just plugging the fax line into whichever jack corresponds to the patch panel.
If there are only 2 pair (4 wires) connected to the back of each port on your panel, fire your cabling guy, and hire a real technician to fix his work.