About Dsl
History of DSL
The technological race is a fast-paced one indeed. Improvements are constantly being sought. What had at one time seemed to be amazing advances quickly became yesterday's news. But have you ever wondered where it all started? Has DSL (Digital Subscriber Line) always moved at this speed? This history of DSL Internet access will show just how quickly new technology became old. Any history of the transmission of data begins with Alexander Graham Bell and Samuel Morse, two pioneers who developed the idea that data could be transmitted through copper wire. Of course, they had no idea of the scope of their findings, or where they would actually lead. However, the principles had been laid.
The principles demonstrated by these two great pioneers, Bell and Morse, were instrumental in developing a path for the ever-increasing volume of data transmitted over the Internet. In the late 1980s, Joseph Lechleider, of Bellcore, demonstrated the feasibility of sending broadband signals, establishing his place in history as the originator of broadband technologies. He developed the idea of asymmetry (the A in ADSL), which suggested that a higher rate of data could be sent in one direction. Putting it simply, this was the beginning of the move from analog to digital.
The first efforts of this new technology created ISDN. ISDN, which stands for Integrated Services Digital Network, is a system of digital phone connections which allows voice and data to be transmitted simultaneously across the world. The result of this is that more data could be transmitted at the same time, thus creating more speed. And remember, speed was (and still is) the goal. John Cioffi, who eventually became a professor at Standard University's Department of Electrical Engineering, developed DMT (discrete multitone), a method of separating a DSL signal into 256 frequency bands or channels. Cioffi founded a company called Amati, who, in 1993, designed equipment to...
Please login to view the full essay...