The Avaya 9504 is the entry level phone in the Avaya 9500 Digital Series for Avaya IP Office. This set is meant for the everyday user such as cubicle workers and sales staff. It offers a 4 x 32 character white backlit display along with 4 feature buttons and a headset port.
This is the global version which Avaya has transitioned to instead of the English text below the buttons. This is the only difference between the Global and Text version.