Abstract: A system including: a system control unit; a context aggregator operatively connected to the control unit, where the context aggregator is configured to on predefined events, receive context information about a user from two or more context sensors, calculate an aggregated presence status for the user based on the received context information, wherein a classification algorithm is used to calculate the aggregated presence status; and a user database operatively connected to the control unit, wherein the user database is configures to store user information for plural users, the user information comprising at least a user name, the aggregated presence status, available communications terminals and a probability of reaching the user on each of the available communication terminals, wherein the available terminals and their probability is a function of the aggregated presence status, wherein the system control unit is configured to, on demand distribute at least parts of the user information, including the avail

Abstract: When interacting and talking with each other, humans are quite successful at conveying information and reacting appropriately. That is, they are able to interpret situational information which in most cases is only implicitly given. This ability is in stark contrast to most of the current state-of-the-art computer and telecommunications systems, which in large are unaware of this context information. Consequently, there has recently been great interest in making applications more context-aware so that they can adapt to different situations and be more receptive to user's needs. The purpose of this project was to explore how one through examining different kinds of context information can find ways to automatically set a user's presence status. This presence status is useful as it allows for a person to decide whether it is appropriate to initiate communication or not.