I have gfi fax at some small installs, it supposedly scales out nicely but you would have to check for yourself.
I just rolled out hylafax with TDMoE gateway, pretty nice, 100 users, 100 DID's. I think they paid their asterisk vendor 1,500 dollars and the server was around 2,000. ~ Finally, powerful endpoint security that ISN'T a resource hog! ~ ~ <http://www.sunbeltsoftware.com/Business/VIPRE-Enterprise/> ~
