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www.southgatearc.org
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Telephone DSL speed increasesAlcatel-Lucent Bell Labs say they can now send data rates of up to 300mbps down telephone lines. They achieved 300mbps over at a distance of 400 metres and 100mbps over 1km by making use of "DSL Phantom Mode". This involves the creation of a virtual or “phantom” channel that supplements the two physical wires that are the standard configuration for copper transmission lines. The increase in transmission capacity arises from the use 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. DSL services make use of the HF radio spectrum to send data over telephone lines. There is no mention in the Alcatel-Lucent Bell Labs press release of how much radio interference this new development could cause. Press Release - Alcatel-Lucent Bell Labs achieves industry first: 300 Megabits per second over just two traditional DSL lines
ERO report on high capacity DSL systems UKQRM Forum
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