Bill Shorten has vowed to scrap the coalition's "second rate" National Broadband Network and resume Labor's original fibre-to-the-premises plan.
The opposition leader will announce his NBN plan in Sydney on Monday, pledging to roll out fibre-to-the-premises for up to two million additional homes and businesses.
Labor insists the announcement will have no impact on the budget and that its initial rollout will be completed by the same time as the government's NBN is likely to be finished.
It says it will spend exactly the same amount of public money on the NBN as the government, capping total funding at $57 billion.
Labor says construction of Prime Minister Malcolm Turnbull's fibre-to-the-node network would cease when the existing pipeline of work was wrapped up.
Within the first term of a Shorten government, Infrastructure Australia would be commissioned to investigate how those already connected to Mr Turnbull's NBN could be moved over to fibre-to-the-premises.
Mr Shorten said the coalition's NBN had blown out from $29.5 billion to up to $56 billion.
Less than 20 per cent of Australians had access and many were getting a slower, second-rate copper NBN, he said.
"Malcolm Turnbull's second rate NBN is holding Australia back," Mr Shorten said.
"You can't have an innovation boom while you are still buffering."
