Ours is set up as Sandeep suggests above with an added wrinkle of using delayed call forwarding, so I thought I would bring it up.
We use Updox so we upload our faxes from the fax server to Updox for free now, since it it a great way to get images into AC. But, at first we call forwarded all our faxes to Updox and were paying $70 a month on top of their $35 montly fee for the privilege of using Updox as our cloud based fax line. They charge a few pennies per fax. Saving money with a robust 1 line Mainpine fax board and setting up a fax server was the way to go.
But every once in a while my receptionist would answer a phone call from a fax machine, so some idiot was frustrated enough with trying to send us a fax to our busy fax server that they would send to our voice line.
So if you use a fax server and Updox, I recommend that you have your phone carrier change your fax line to call forward to the Updox 800 number IF the fax number has not been answered by so many rings, I chose 5 rings.
In Updox you can see how the fax got to Updox and less than 5% of the faxes get there for us by the delayed call forwarding trick.
So I am getting as many fax lines as I need to get every fax answered without all the high fees of having Updox be my first fax line.
