I need to build a UC500 based system with a lot (almost 20) of analog ports for physical FAX machines. It seems like the most I can do on the box itself is 4 FXS ports therefore I am looking at ATA devices. I have several questions concerning this:
1) Which impedance version for use on North American FAX machines
2) I think I want to go H.323 to save on licenses. Will this work for FAXes and how hard is this to do?
3) Lastly, is this the best way? Other ideas?