Fax

[usa2k]

Do you need to sell the fax addon if you are behind a pap2 or any of the other devices and actually have a fax machine or is that just to do fax to email and soft fax out.

YMMV but VoIP is not very reliable using FAX for any provider.
People still do it. If you are using a FAX machine, you do not need the FAX add-on.