Avaya 1408 Digital Telephone 700504841 (works with Avaya Aura Communications Manager and IP Office) 3 line x 24 character backlit display 8 programmable line/feature buttons with dual LEDs Fixed feature keys include hold, conference, transfer, drop, menu, contact, call log, redial, mute, and headset 3 soft keys and 4-way navigation cluster with context sensitive user interface The Avaya 1408 digital telephone is compatible with Avaya Aura Communication Manager 5.2.1 or later and IP Office Release 6.0 or later