4. Designing a Triple-Play Access Network

As the inexorable search for more and cheaper bandwidth continues apace, Ethernet Digital Subscriber Line Access Multiplexers (DSLAMs) and Access Nodes (ANs, a DSL Forum1 term) are all the rage. They allow the platform to deliver next-generation multimedia applications over DSL technology. Thanks to faster uplinks and greater switching capacity, Ethernet DSLAMs can support speedier DSL lines as well as the triple-play services that are built on top of DSL. This chapter provides an overview of Ethernet DSLAMs and how they are deployed in service provider networks. It also explains the underlying technology and jargon and includes a section devoted to building a high-availability Broadband Network Gateway ...

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