Phone and fax setup

recently had a home phone added to my cox plan . Want to use it as a fax line also. The phone plugs into the cable box they brought me and it has two phone ports but neither the phone or fax work on the second port. The epson workforce 2650 says to plug the fax into the phone wall outlet so that was not helpful. How do I use the phone and the fax on the same line with a distinct ring for the fax.?