The company said in a statement that using G.fast would enable it to offer faster speeds to those residents who were being served by fibre to the basement or fibre to the kerb (what NBN Co calls fibre to the curb).
It claimed that G.fast could offer speeds past the current 100Mbps levels delivered by VDSL technology to speeds of up to 1Gbps over copper lines by using higher frequencies of either 106MHz or 212MHz – compared to just 17MHz on VDSL.
"Global operators including AT&T in the US, BT in the UK, Swisscom and Taiwan’s Chunghwa Telecom have already launched the technology to end-users," the statement said.
The G.fast technology will be supplied by Nokia, ADTRAN and Netcomm Wireless - the company's three existing fixed-broadband suppliers.
NBN Co chief strategy officer J.B. Rousselot said: "“Bringing G.fast technology to the NBN Co access network in 2018 again shows our commitment to being at the cutting edge of emerging technologies.
“Adding G.fast to the toolkit for the FttC and FttB networks will allow us to deliver ultra-fast services faster and more cost effectively than if we had to deliver them on a full fibre-to-the-premises connection.
“Our FttP and HFC end-users already have the technology to support gigabit services and adding G.fast over FttC provides the upgrade path for our FttN end users to ultimately receive gigabit speeds too.”