Barros, Pedro PitaBraz, Cláudia Rodrigues2022-11-182022-11-1820012001http://hdl.handle.net/10362/145631The universal service concept can be considered on of the basic elements of the information society and its importance should be analysed in the context of a 1993 European council resolution, which established January 1, 1998, as the date for full liberalization of voice telephony and telecommunications infrastucture.....engmaster thesis