Digital Subscriber Line: Signals, Specifications and Driver Solutions

UNLIKE competing technologies, DSL eliminates the need for extensive and expensive infrastructure upgrades — improvements that are hard to measure in terms of time or money. Where original telephone company strategies centered on the time consuming and costly task of fiber installation, demand for multimegabit services has forced them to evaluate approaches that leverage the existing infrastructure and provide a quicker time to market. That is one of the DSL technology’s chief advantages: the ability to transform the nearly 700 million phone lines installed worldwide into multimegabit data pipes capable of speeding digital voice and data to homes and businesses. [Par00].