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First Mile Access Networks and Enabling Technologies by Tony Antony, Ashwin Gumaste

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DSL Technologies

This section covers some of the DSL implementation methods, highlighting some of the various technologies available, including the following:

  • ISDN-DSL (IDSL)

  • High-data-rate DSL (HDSL)

  • Symmetrical DSL (SDSL)

  • HDSL 2 (the next-generation HDSL)

  • Asymmetrical DSL (ADSL)

  • Rate-adaptive DSL (RADSL)

  • Very-high-data-rate DSL (VDSL)

ISDN-DSL

ISDN stands for Integrated Services Digital Network and is a method to best use the plain old telephone system (POTS) by dedicating lines for pure data-centric or high-quality hybrid applications. ISDN DSL was the first among the numerous variants of DSL that came to the fore. DSL was conceived from ISDN, which was created to facilitate an environment to integrate voice and data traffic in the PSTN end-to-end ...

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