Federal communications minister Stephen Conroy says opposition is lying with a claim its national broadband network plan would pose less asbestos risk.
Opposition communications spokesman Malcolm Turnbull on Tuesday said the coalition's broadband plan would cause "much less disturbance" and hence pose "much less of an asbestos issue" than Labor's $37.4 billion project.
"What they're doing is trying to create a scare campaign," he told Sky News on Wednesday.
"Malcolm Turnbull works on the policy that if you're going to tell a lie, let's tell a big one - let's make sure we go for a cracker."
Senator Conroy said under Mr Turnbull's NBN plan, three to four million Australian homes would have "exactly" the same work done on them as they would have under Labor's plan.
"But apparently that's just trivial," Senator Conroy said.
"Malcolm Turnbull should come clean."
Telstra has been accused of cutting corners in handing over infrastructure to the network builder NBN Co after contractors and communities raised fears they may have been exposed to the deadly material.
Telstra denies this, but the Labor government is under pressure from the coalition to explain when it knew about asbestos issues in the Telstra pits and ducts.
NBN Co is using the infrastructure to roll out fibre-optic cable for the broadband network.