The trials of the ultra-fast technology were announced by NBN Co in August and were conducted, with Nokia, in NBN Co's test labs last month.
NBN Co and Nokia both said on Tuesday the peak aggregate speed of 8Gbps was achieved over 30 metres of twisted copper wires during the lab tests.
The two companies said they had also achieved up to 5Gbps over 70 metres, which NBN says is about three times the length of the average copper lead-in to an Australian home.
Tuesday’s announcement follows the release this week of a report by Ovum, jointly commissioned by NBN Co and BT, in which the global analyst firm predicted that G.fast technology would be serving nearly 30 million subscriber homes and businesses around the world by 2021, just four years after the first commercial G.fast services are due to launch in 2017.
Ovum expects that in 2021 G.fast will be supporting nearly 29 million subscribers, representing 3% of the global fixed broadband market, and that the growth in new G.fast subscribers is expected to accelerate in each year, rising from 330,000 in 2017 to nearly 11.5 million in 2021.
NBN Co says XG.Fast can be deployed across a range of scenarios in the field – delivering ultra-fast speeds to either Multi-Dwelling Units (MDUs) in a Fibre-to-the-Building (FttB) scenario or via a Distribution Point Unit (DPU) in a Fibre-to-the Curb (FttC) based network.
In late September, NBN Co announced its intention to deploy FttC services to approximately 700,000 premises on the NBN network – providing an “ideal platform” for potentially deploying future XG.FAST services.
Dennis Steiger, chief technology officer of NBN Co, says that although XG.Fast is still in its very early stages of development, the “lab trials we have conducted demonstrates the huge potential that the technology offers”.
“XG.Fast gives us the potential ability to deliver multi-gigabit speeds over copper lines — virtually on a par with what is currently available on Fibre-to-the-Premises — but at a lower cost and time to deploy.
“While our core goal remains to connect eight million premises to the NBN by 2020 we are keeping a close eye on new technologies like XG.Fast to ensure we can meet the future bandwidth demands of Australian broadband users.”
Nokia says the lab trial demonstrated the capability of XG-Fast to meet NBN Co’s “future demands for high-quality Internet services using widely deployed copper infrastructure”.
Ray Owen, Nokia Oceania Market Unit head, said: “NBN Co is now well advanced in its goal to deliver ubiquitous broadband coverage across Australia. At the same time, NBN Co is actively engaged to make sure it has the flexibility to adapt for future demands, including through trials of emerging technologies like G.fast and XG-FAST. As NBN Co’s original fixed networks partner, we will continue to work with NBN Co to ensure it is exposed to the very latest technology innovation and best placed to evolve its network.”