NBN Co has acknowledged the existence of an internal document detailing results of a fibre-to-the-premises deployment trial but said it was written by a well-meaning member of staff and was misguided.

The company disputed an article published by Fairfax Media on Saturday detailing cost and rollout time-frame savings and recommendations based on a trial in Melton, Victoria. It dismissed the report as inaccurate in an online statement.

Options: NBN Co says it remains technology-agnostic. Credit:Glenn Hunt

On Monday, an NBN Co spokeswoman said the document had not been endorsed by management "due to a number of shortfalls in the methodology and metrics", and had not been verified.

However, she acknowledged some of its findings had merit and had already been adopted in parts of the network rollout where applicable. This included the use of thinner cables and smaller footprint multiport equipment.