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21 April 2010 ,
Written by Dhruv Tanwar
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Alcatel-Lucent Bell Labs has demonstrated connectivity of 300 Mbps over just two traditional copper-wire DSL lines. The “DSL Phantom Mode” lab test, which the company says is an industry first, will maximize the value of existing copper networks of ISPs and telecommunications companies by pushing the envelope on DSL capacity.
Alcatel-Lucent, which ranked #30 on the Global Software Top 100 - Interim Update December 2009, said that its research arm, Bell Labs, successfully demonstrated a technology that boosts the transmission speeds achievable over just two digital subscriber lines (DSL). In a lab test of “DSL Phantom Mode”, Bell Labs achieved downstream transmission speeds of 300 Megabits per second (Mbps) over distances up to 400 meters (or 100Mbps at 1km).
The telecom giant says that at these speeds, service providers will be able to maximize the ability of the existing copper infrastructure - widely deployed around  the world - to satisfy demand for bandwidth-intense residential triple-play and business services, for years to come. At its core, DSL Phantom Mode involves the creation of a virtual or “phantom” channel that supplements the two physical wires that are the standard configuration for copper transmission lines. Bell Labs’ innovation and the source of DSL Phantom Mode’s dramatic increase in transmission capacity lies in its application of analogue phantom mode technology in combination with industry-standard techniques: vectoring that eliminates interference or “crosstalk” between copper wires, and bonding that makes it possible to take individual lines and aggregate them. Analysts opine that with existing copper loops being able to facilitate 300Mbps at 400 meters, the whole next-generation broadband competitive environment would change in terms of a wide range of new business opportunities for ‘traditional’ DSL players. Alcatel-Lucent said further research is being conducted to refine deployment models and determine a specific set of customer premises equipment (CPE)-models compatible with the DSL Phantom Mode technology. |