Abstract
This article discusses a danger alert system created as a part of the research project at Department of
Telecommunications of Technical University of Ostrava. The aim of the system is to distribute pre-recorded voice
messages in order to alert the called party in danger. This article describes individual technologies, which the application
uses for its operation as well as issues relating to hardware requirements and transfer line bandwidth load. The article
also describes new algorithms, which had to be developed in order to ensure the reliability of the system. Our intent is
focused on disaster management, the message, which should be delivered within specified time span, is typed in the
application and text-to-speech module ensures its transformation to a speech format, after that a particular scenario or
warned area is selected and a target group is automatically unloaded. For this purpose, we have defined XML format for
delivery of phone numbers which are located in the target area and these numbers are obtained from mobile BTS's (Base
transmission stations). The benefit of such communication compared to others, is the fact, that it uses a phone call and,
therefore, it is possible to get feedback who accepted the message and to improve efficiency of alert system. Finally, the
list of unanswered calls is exported and these users can be informed via SMS.
