ITU standardizes 1Gbps over copper

The ITU will soon standardize G.fast, a broadband technology capable of achieving download speeds of up to 1Gbps over copper telephone wire. It will use 106MHz of bandwidth in the initial version, going up to 212MHz later on. This compares to the 2.2MHz that ADSL2+ uses, and the 8, 17 and 30MHz bandplans commonly deployed for VDSL2.

The G.fast technology provides fibre-like speeds of 500Mbps down and upstream, according to the ITU, for an aggregate 1Gbps within a 250 metre range from a distribution point. The organisation said it can supplement fibre to the home strategies for providers, due to the high speeds it offers.

The standardization of G.fast started in 2011, and has now reached what is known as first-stage approval or consent. That means the technical specification is ready to become standard. Next up is a comment period, and the standard is expected to be final by April next year, according to ITU.

"This is the most critical milestone in the process. The comments are designed to optimize the standard, not to reverse anything," said Michael Weissman, vice president of marketing at chip vendor Sckipio, which is focusing solely on silicon for G.fast.

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