ADSL Techology Explained, Part 2: Getting to the Application Layer

摘要

In part one of this two-part series, we explored the physical layer of ADSL. In part two, we look at the network and application layer protocols, as well as the handshake and initialization procedures. The main physical (PHY) layer structure of asymmetric digital subscriber line (ADSL) technology, as explored in part one of this article, involves a modulation scheme known as discrete multitone (DMT). In this second part, we examine other PHY layer components, move on to the handshake and initialization process of ADSL, and finally end with a look at the network and application layer protocols.