4-Line Phone with Digital Answering System, Compatible with AT&T 945, 974, Speakerphone, 200 Name/Number Caller ID History, 200 Name/Number Directory, Auto Attendant, Intercom, Auto Line Selection,, Do Not Disturb, Flash, Hold, Line Status Indication, 3-Party Conferencing, 20 Minutes of Digital Recording Time, Visual Message-Waiting Notification.