You can use any fax-capable machine to send and receive faxes on a dedicated Fax Line. To add a fax line to your account, you must maintain at least one voice line for making and receiving calls.
NOTE: Your voice line is not optimized for fax service, however, you can send and receive an occasional fax on this line. To do so, unplug the telephone cord from the port on the adapter and plug the cord from your fax machine into that same port.