Friday, June 1, 2007

History of broadband

Historically, the term broadband was used to distinguish multifrequency communications systems from baseband systems. Not long ago, telecommunications companies could offer only a limited range of highly reliable, lower-bandwidth services over their widely installed conventional copper twisted-pair telephone wire. Other options for delivering scalable, cost-effective high bandwidth services via existing wireless and physical media were also limited. Over time, as newer technologies developed, the term broadband has become synonymous with higher bandwidth services…

Today’s broadband

With well over 100 million lines provisioned worldwide, DSL (digital subscriber line) is truly a global and well-recognised technology. DSL deployment is even a political issue in many countries. Some governments track the overall number of DSL subscribers and subsidise large infrastructure deployments to attract businesses and development. This is much like bridges, electricity, and roads are subsidised to stimulate economic growth. DSL represents more than 63 per cent of global broadband connectivity…

(P. 1, p. 30 ‘Broadband Network Architectures’ by Chris Hellberg, Dylan Greene, and Truman Boyes, from Prentice Hall www.prenhallprofessional.com)

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