The FAX-575 allows you to Fax and take voice calls on a single line, a feature that saves the expense of separate phone lines. A built-in interface lets you connect this fax machine to an external answering machine. The FAX-575 is Caller ID and Distinctive Ring Detection ready, so that if you subscribe to these services through your local phone company you can utilize them on the fax machine as well. Besides faxing, this fax machine can also make copies and scan. The Brother FAX-575 comes with a one year limited warranty.