This is the largest difference between the Avaya phone and the premium handsets as they offer large screen with digital labels and it is a very. Avaya / Digital Phone User Guide. Answering and Making Calls. Answering a call. If you are not already on a call, lift the handset. If you are already on. The Avaya Digital Phone is a full-featured digital phone designed for communications-intensive users such as receptionists assistants and managers.