A CAE500 Fire Alarm Control Panel sends information at each event occurred, without the need of a request from an application. This means that an application works as a passive terminal and a Fire Alarm Control Panel works as a Master in communication, sending unsolicited messages at any time. Therefore, this Driver is always waiting for data and, when it receives some full information about an event, saves this event on a queue until a Tag performs this reading. Only one Block Tag is needed to read information of occurred events, described on the next topic.