The document provides instructions for using the MaxMobile Communicator application on a BlackBerry phone to make calls through a company's MAX Communication Server (MAXCS) phone system. It describes how to install and log into MaxMobile, make and receive calls, handle voicemail, and access features like directories, favorites lists, and call history. Notifications are displayed on the phone regarding call and voicemail status. Automatic updates ensure the MaxMobile version matches the MAXCS server version.