Alcatel-Lucent’s research arm – Bell Labs, has announced a prototype technology that enables copper lines to deliver 1 Gigabits per second symmetrical (simultaneous download and upload) broadband speeds. It also, perhaps with a press release in mind, demonstrated 10 Gbps over two pairs of copper lines.
The new technology is called “XG-FAST”, which is an extension of G.fast technology so significant that all the letters have to be capitalised. The G.fast standard is in the process of being finalised by the ITU, and uses a frequency range of 106 MHz to deliver up to 500 Mbps over 100 meters. XG-FAST uses higher frequencies – up to 500 MHz – that allow higher speeds over shorter distances. The symmetrical 1 Gbps demo was over 70m at 350 MHz and the 10 Gbps one was over 30m at 500 MHz.
The main practical significance of all this broadband speed showing off is the potential to overcome the bottleneck currently inhibiting fiber-to-the-home (FTTH), or indeed fiber-to-the-whatever (FTTX), which concerns the final few meters to the final connection that typically still uses copper, rather than fiber. If speeds over copper can match those over fiber then problem solved, in principle.
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The Latest on: Broadband speeds over copper
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