getting Faxes on iMac?

So we have a fax machine at work that has died. We do not use it a lot, but every now and then we have a few customers who fax. We have tried to get them to use email with no luck. We can no longer buy supplies for our fax and I do not want to buy a new fax machine for the few orders we get via fax, and all the great cruise ship deals that come through.



How can I get faxes on a 21" iMac? It is the last model before the slim design came out. Do I need specific hardware to run the line into the iMac?

via ehMac.ca http://ift.tt/1aj924B