Avaya 1616-I 700458540 IP Phone (Black/Refurbished)Key Features: Mfr. Part #: 700458540 4 rows x 24 character white backlit display with dual position flip stand Supports 16 line appearances feature keys with dual LEDs Supports up to three 32 button expansion modules providing access to a total of 112 line feature keys or speed dial buttons 3 contextual soft keys Fixed feature buttons include four way navigation cluster, volume up down, mute, speaker, headset, menu, telephony application, hold,