Chapter 2. xDSL Flavors and Considerations at the Physical and Data Link Layers
This chapter provides an overview of following xDSL technologies:
ADSL — Asymmetric DSL (ADSL) is the most widely deployed DSL technology today with a theoretical download speed of up to 8 Mbps and 1 Mbps for upload speed. This section discusses different modulation techniques, such as Carrierless Amplitude and Phase Modulation (CAP) and discrete multitone (DMT) along with a lower rate version of ADSL called G.Lite.
VDSL — VDSL is an emerging technology that plans to deliver data rates as high as 52 Mbps in the downstream direction for subscribers that have shorter loops to the Central Office (CO). Both ANSI and ETSI are standardizing this technology.
IDSL — IDSL closely ...
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