Avaya Definity 6408+ Speakerphone (White/Refurbished)The Avaya Definity 6408+ 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: 8 Programmable Call Appearance 4 Navigator Keys For Menu Mute Conference Transfer Hold Last Number Dialed Speakerphone 8 Personal Ring Options Handset Handset Cord Line Cord Professional Appearance White