LAN based real time audio-data systems

One of the greatest demands for better communication services comes from the office automation area. The functions related to electronic mail, telephony, and teleconferencing are among these services, due to advantages it creates, such as reduction of cost and time. LANBRETAS is a LAN-based real-time audio/data system that is being developed by the Catholic University of Rio de Janeiro and the Rio Scientific Center of IBM-Brasil and is the subject of this paper. The first part of the paper introduces the motivations to implement the system as well as the implementation environment. The second part presents the system. At first the electronic mail system LANBRETA-DMS, then the telephony system LANBRETA-DTS, and at last, the teleconferencing system LANBRETA-GCS.