DESC: This ATT / Lucent / Avaya phone has 16 programmable buttons with dual LEDs for line or feature appearances. It has built-in conference, transfer, hold, and speaker buttons. It has a full duplex speakerphone for hands free operation, and has a built-in port that allows for connection of standard devices, such as modems or fax machines. It has a 2 line x 24 character backlit tilt display.