How to Call from Avaya Cloud Office First, sign in to the Avaya Cloud Office - If you need assistance doing this, please follow these instructions. Click Phone on the left hand side of the Application You can then either click Make A CallĀ  or you can click the dial pad in the top right. You can then dial the Phone Number you are trying to contact, or if it is an Internal Contact within Iredell-Statesville Schools you can dial their extension or you can search for the user by name, and then click the green call button.