nbn has rejected claims in the media that it will cost $640million to replace parts of the copper network.
The claims published in The Australian were said to have been obtained in a confidential NBN document.
nbn has refuted the accuracy of claims and said that any costs related to build of the nbn network have already been included in the Corporate Plan, released in August 2015.
nbn said that with 550,000 fibre-to-the-node premises now in construction and a further 40,000 able to connect, they are confident that the cost per premises for fibre-to-the-node, as outlined in the Corporate Plan, is accurate.
Released in August and discussed at length, nbn said their Corporate Plan is comprehensive and built from a true history of actuals and experience in building the network at scale.
Risks and mitigation plans for the network are also outlined in the plan, and the revised peak funding figure takes these scenarios into account.
nbn said they have produced a peak funding range and provided a contingency, as prudent measures to manage a project of this size and complexity.