Uso da tecnologia ADSL sobre rede telefônica para transmissão de dados em alta velocidade: a evolução da tecnologia de banda larga residencial

Abstract

With the popularization of the Internet since its inception, the available services have evolved as more users could participate in the virtual environment. But more complex services that require higher rates of access to become viable arose, may be cited as the transmission of video, photo sharing and others. The aim of this paper is to present ADSL detailing the implementation and evolution. They originated out of necessity to be able to use high speed internet connection using the existing infrastructure of telephone lines of a metallic pair. Recommendations ADSL2 and ADSL2 + provided by ITU, implement improvements to the original pattern allowing the problems encountered during use and apply lessons learned in the development of ADSL. Continue using the telephone infrastructure to deliver speeds increasing part of the challenge for the area. As the subject of future discussion can treat the rate-distance relationship in order to overcome the limitations currently imposed by current standards.