Features:
* 2 line x 24 character LCD
* 16 programmable call appearance/feature buttons
* Navigation keys for menu, next, previous, and exit
* Fixed feature buttons include conference, transfer, hold, speaker, mute, and redial
* Built-in 2-way speakerphone
* 8 personal ring options
* 4 soft keys for menu functions
* 12 soft key default features with access to 18 alternative soft key features
* Equipped with an integrated headset jack
* Adjunct port for 100A analog interface module

Compatibility
* The 6416D+M Telephone is compatible with Definity R6.1 or higher and Avaya IP Office.
* It requires an available station port on a TN2181, TN2224/B/CP, IP403/406, IP400 Digital Station 16, or IP400 Digital Station 30.