- 2-line x 24-character LCD display
- 24 programmable line/feature buttons
- 4 navigation keys for browsing feature menus and 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
- The 4424D+ Telephone is compatible with Merlin Magix and Avaya IP Office systems.
- It requires a station port on a 412 TDL, 024 TDL, IP403, IP406, IP406V2, IP400 DS16, or IP400 DS30.
Avaya 4424D Plus Telephone Users Guide.pdf
Avaya 4400 Series Phones.pdf
Avaya Magix 4400 Series Phones Data Sheet.pdf