I was paying for a third line to receive a few faxes a month into my home business office. My frugal scottish genes obliged me to try this 5500. It worked first time, allowing migration to a Comcast Digital Voice (VOIP) 2-line system which is an additional saving. The fax is an HP 3310 All-in-one, no changes in settings were required, and it now shares my home line. Faxes are sent to the HP and voice calls ring through after a couple of seconds.