The Avaya 2420 Digital Telephone has all the features of the 2410,plus a large display screen with a 7-line x 29-character LCD.Customers can change the settings of the standard display from 8 to 12 call appearance/feature button labels. When you select this mode, the bottom line of the screen display, which is used for softkey labels in standard mode, can contain four more call appearance/feature buttons with shortened labels. The Avaya 2420 Digital Telephone is designed with 24 system call appearance/feature buttons (3 pages / 8 buttons per page).This gives a wide range of flexible capabilities that can be performed with the touch of a button. The EU24 Button Expansion Module can expand the Avaya 2420 Digital Telephone with 24 additional call appearance/feature buttons.