Avaya Definity 6408D+ Speaker Display Phone (Grey/Refurbished)The Avaya Definity 6408D+ Speaker Phone is a speakerphone that works with Definity Phone systems Release 6. 1 or higher. This phone needs a TN2181 digital circuit card or TN2224B digital circuit card. Key Features: Mfr. Part #: 700258577 Avaya Definity 6408D+ Speaker Display Phone 24 Character LCD Caller ID Date and Time 8 Programmable Call Appearance 4 Navigator Keys For Menu Mute Conference Transfer Hold Speaker Last Number Dialed Two Way