As new services demand increased performance and stability from the access network, some new tools can be brought into play that help maximize the existing copper plant's potential. Basic fault and performance management tools such as dual-ended and single-ended line testing, and advanced collection of statistics and analysis can help diagnose the complex problems that appear in a converged triple play access network. In addition to these maintenance tools, dynamic line management (DLM) can be used to maximize loop performance across a group of lines. DLM is already useful in today's digital subscriber line (DSL) networks and becomes a prerequisite when dynamic spectrum management (DSM) techniques are employed. This applies immediately to mixed deployments of asymmetric digital subscriber line (ADSL) and very high speed digital subscriber line (VDSL) and will be even more useful when crosstalk cancellation is deployed. This paper presents an overview of loop test and optimization procedures for today's and tomorrow's copper access triple play network.
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