Communications Minister Stephen Conroy says Australians will have to pay up to $3000 for the final kilometre of fibre cable to their premises under a coalition plan.

Opposition communication spokesman Malcolm Turnbull told a information technology conference on Tuesday he backed a plan where consumers on a fibre-to-the-node (FTTN) network could pay to upgrade their home or business for a full-fibre cable link.

A FTTN rollout would involve the fibre broadband cable rolled to a cabinet on the corner (or node), with the last kilometre or so using the fixed copper line to the property.

"So if you've got a customer that wants fibre, for whatever reason, then there's no reason, technically, why you shouldn't make it available," Mr Turnbull told reporters on the Sunshine Coast on Tuesday.

Mr Turnbull has repeatedly said the coalition would prefer a FTTN rollout as it would provide faster broadband to more Australians quicker and cheaper than Labor's $37.4 billion fibre-to-the-premise (FTTP) plan.

But Senator Conroy said Australians would have to pay extra to connect to super fast broadband.

"I have seen estimates that if this approach was adopted in Australia it could cost as much as $3000 to get connected," Senator Conroy said in a statement on Tuesday.

"This user-pays fee for high-speed broadband is on top of the $15 billion plus cost to the Australian taxpayer of the coalition's copper-to-the-home broadband plan."

Senator Conroy said Labor's NBN would deliver high speed broadband optic fibre cable to 93 per cent of all homes and businesses across Australia by June 2021.

"Under the coalition, fibre-to-the-home for most Australians would only be available if you could afford it," he said.

The coalition is yet to release its broadband policy.

Mr Turnbull has indicated a coalition government would use a mix of technologies including fibre, copper, pay-television cable, wireless and satellite to upgrade Australia's communications network.