AT&T 974 Features: Easy to install Speakerphone 3-Party Conferencing Paging, Intercom and Call Transfer Between Stations Caller ID/Call Waiting Capability on all Four Lines 1 to 4 Line Capability. Expandable up to a total of 16 stations. Once you have this station, you can add up to 15 more (sold separately) as your business grows. Each additional unit requires its own phone jack and AC power outlet. 200 Name/Number Directory 32-number speed dial and 16 Intercom Memory. No more looking up numbers! System allows you to store up to 32 numbers in its "phone book" memory null so dialing frequently called numbers can be done quickly and easily. Last 6 number redial Chain Dialing Visual Message Waiting Indicator Rapid Scroll Auto Line Selection Auto Redial Speakerphone lets you do two things at once! Carry on a conversation while working on the computer or looking for the file you're talking about. Headset and hearing-aid compatible Digital handset, speakerphone and headset volume control. 3-party conferencing Selectable ringer tones Programmable pause Paging Intercom Call transfer Last six number redial Hold/Mute/Flash Do-not-disturb. 4 Line Large backlit LCD for easy viewing. Two data ports. Get three machines in one! The station's two auxiliary jacks allow you to plug in up to two external communication devices null so you can operate a fax, modem or answering machine via your phone. Power Failure Operation for all 4 lines. Battery backup. When the power goes out, battery backup allows all four phone lines to operate (battery sold separately). Memory loss protection saves your programming, directory entries and Caller ID memory so you don't lose them all when the power fails. Compatible with AT&T models 944, 955, 964, 945 and 984 Call Waiting/Caller ID service required from your local telephone company. Color: Titanium Blue Replaces: ATT 955 *** DISCONTINUED ***