The Avaya 2420 Digital Phone (700203599) can be expanded with the Avaya EU24 Expansion Module, which would add 24 Programmable Call AppearanceFeature Keys. Available refurbished from TelecomEx.
Avaya 2420 Digital Phone Features:
Large-scale display for easy viewing
Call control with 24 call appearancefeature buttons
Switch automatically performs keybutton labeling
Online access to electronic downloads gives near-instant access for product upgrades and feature enhancements
Additional features include call logging and a speed-dial directory
Available only in gray