FAX machines are still needed in the business world as a written form.
In germany we have BGB § 126 “Schriftform” which is needed to close or cancel a contract.It says you have to sign a letter by hand and it has to be the original (a fax is also allowed).
Since 1. October 2016 there is a new law in germany which says contracts don’t have to be in written form anymore.
This is only valid for contracts signed after this date.
T.38 Printer http://www.t38printer.de
How it works:
You install the software. You get a new printer.If you want to fax something.. send it to the printer.
Before using it you need to configure the outgoing SIP account.