Steffens told the committee so far no MDUs had been declared frustrated.

The Department of Broadband, Communications and the Digital Economy has previously stated that MDUs are typically cheaper to roll out fibre to than single-dwelling units.

"Being lower cost and typically found in higher-density areas, most MDUs are likely to fall within the fibre footprint of the NBN and are also likely to be commercially attractive to NBN Co," .

"Providing FTTP coverage to MDUs is therefore important to NBN Co both for its business case and for meeting its FTTP coverage requirement."

However, the report stated there were several challenges of connecting MDUs to the NBN. For example, engaging with MDU entities, such as the body corporate, which can result in delays.