The Avaya Partner 18D Series 2 Telephone is a powerful business telephone that offers a range of features to maximize productivity. It features a 2-line x 24 character backlit display, 16 programmable buttons with dual LEDs for line or feature appearances, 2 fixed intercom buttons, built-in conference, transfer, hold, and speaker buttons, hands-free answer on intercom, full duplex speakerphone, volume control buttons and a message waiting light.