Aplicação de Métodos Estruturados na Especificação e Implementação de um Sistema de Comunicação em Tempo Real

In 1990 INESC (Institute of System Engineering and Computers) was contracted hy PT-Portugal Telecom - the Portuguese telecom operator - to develop the prototype of a telesurveilling system supported on ISDN (Integrated Services Digital Network), in the context of the R&D activities promoted hy PT concerning the introduction of ISDN in Portugal, project that was concluded in 1994. This paper includes a hrief survey and discussion on the structured techniques evaluated for the system specification, and presents and discusses the analysis and design processes of the software developed to support the real time functionalities of the system (images alarms, ...) focused on the most complex of its components, the Central Telesurveilling Station.