- AT&T 2-line speakerphone with caller ID and call waiting- 2-Line operation - dial and receive calls on two different phone lines- Speakerphone allows you to speak and listen without holding the handset- 3-Party conferencing allows user to have a 3-way conversation between user and persons on 2 other lines. 2 other lines can be inside lines, outside lines or a combination- 2 Line operation- Caller ID/call waiting- 18 number speed dial- 100 Name and number phonebook direction- Speakerphone- 99 Name/number caller ID history- Line power mode- Selectable ringer tones for both lines- Headset compatible (2.5mm jack)- Line status indication- Data port- Hold- Mute- English/Spanish/French setup menu- Automatic line selection- Chain dialing- Display dialATML17929