We can thank Bellcore (now Telcordia) for nearly all of the xDSL acronyms. Let s start by getting two pieces of trivia out of the way: First, xDSL refers to the type of digital modem, not a line per ...

DSL modem uses twisted-pair bandwidth from 0 to approximately 80 kHz, which precludes the simultaneous use of analog telephone service. xDSL chips are installed at both ends of a line, to convert a ...