You must set up a VOIP adapter for the member that you have set to receive incoming faxes. This adapter will need to be plugged into an ethernet connection, then your fax machine will plug into the phone port of the adapter. With this setup, you can send and receive faxes from your fax machine as if you had a regular fax line.
Find our Grandstream HT-801 adapter for sale in the shop.
Note: Pro includes the “receiving faxes” feature described for the free version
Note: You will need to set your fax machine’s baud rate to 9600bps or lower