Displays caller information for incoming calls the name and/or number of external callers as well as the extension and co-worker name for internal calls that you receive, so you don't have to have a separate Caller ID box

Each 4400 telephone is available in white or black, and has four fixed-feature buttons, Conference, Transfer, Hold, and Last Number Dialed. Other buttons include Speakerphone, Mute, and Volume. These globalized telephones provide easy-to-use features English labeling. Most models also have flexible feature buttons and four "navigator" keys indicating Menu, Next, Previous, and Exit, as well as four softkeys for controlling display functions. The 2-line by 24-character display, available with most models, shows the date and time when the telephone is idle. The 4400 Digital Telephones also improve productivity and allow for one-touch operation with headsets, so you can answer, hang up, and dial without having to pick up the handset. All models include a built-in headset jack, eliminating the need for headset adapters and, in turn, reducing costs and eliminating desktop clutter.

If you are interested in leasing Avaya equipment more information can be found here.

Information on Avaya headset compatibility can be found here.

Information on Avaya Office solutions including: Avaya IP Office telephones and systems, Avaya One-X Quick Edition telephones and systems, and Avaya Partner telephones and systems can be found here.

Information on Avaya Phone System installations can be found here.

The Avaya 4400 Single-Line Digital Voice Telephones deliver the right combination of business communication functionality. Usability features are readily available. You can personalize your phone by programming the buttons on your telephone simply by choosing from a selection of convenient features.