Easy to install Paging, Intercom and Call Transfer Between Stations 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 20 Minutes of Digital Recording Time Auto-Attendant Call Screeing/Intercept Remote Access Time/Day Stamp 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. Caller ID/Call Waiting Capability on all Four lines 200-Name/Number Caller ID History Chain Dialing Rapid Scroll Auto Line Selection Duplex 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 volume control for speaker, handset and headset Selectable ring tones 3-party conferencing Paging Intercom Call transfer Hold/Mute/Flash Programmable pause. Selectable Ringer tones Do-not-disturb. 4 Line Large backlit LCD for easy viewing. Auto Redial Last 6 number redial 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. 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 974 Call Waiting/Caller ID service required from your local telephone company. Dimension: 9.25" high x 9" wide x 2.75" deep Unit Weight: 4.7 lbs. Power: AC Adaptor included 12V DC 500 mA Color: Titanium Blue Replaces 964 *** DISCOTNINUED ***