DSL is the most
widely deployed broadband access technology worldwide to bring
triple-play services to business and residential customers. Its
performance can vary greatly depending on the variety of DSL,
the infrastructure available as well as the quality and length
of outside-plant copper loops and premises wiring. To meet
guaranteed service levels and customer expectations, especially
for triple-play services, DSL requires thorough qualification
and
verification before, during and after service has been delivered
to the customer.
DSL Technology Overview