7-line x 24-character Vacuum Fluorescent Display (VFD).

24 programmable line/feature buttons.

Provides access to administrator programming menus via soft keys

This is the only TDL phone that can be used for programming.

Dedicated headset jack.

Displays Caller ID and internal extension information.

Provides such features as hold, transfer, conference, redial, and mute.

Built-in 2-way speakerphone.

Power supply required to support display and 4450 DSS.