Ralph Steffens, chief operating officer at NBN Co, told a Joint Committee on the National Broadband Network that it was still working on its strategy for how to connect apartment buildings, which NBN Co calls multi-dwelling units (MDUs), to the NBN.

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"We are working on this. There is no right answer to this. Every MDU looks different -- there is not one method of connecting MDUs and installation methodology evolves rapidly. Therefore, what we do today can change over time because there will be no efficient way of doing this," he said.

"[But] we are connecting MDUs today."

NBN Co told Computerworld Australia 189 MDUs have been completed and work is under way on another 200 MDUs. "Over the course of the rollout we expect to connect over 400,000 MDUs, including building[s] constructed over the next 10 years," a spokesperson said.