The number of residents in Minnamurra and Kiama Downs connected to the network has hit 25 per cent, or 600 homes.

During his visit to Kiama Library on Friday, Mr Quigley said the rate was unexpected compared to figures from the US, UK

and Europe.

"When we compare the take-up here to the rest of the world, it normally takes a couple of years to get the 25 per cent take-up that we've got in Kiama after a relatively short amount of time," he said.

"There's something going on here, which we're most interested to see and what I think it relates to is how (Kiama Council) has really brought the community together and started leveraging how this technology can be used."

NBN Co is currently completing the detailed maps for the second stage rollout at Kiama, Kiama Heights and Jamberoo, making sure every home and business has been listed for the rollout.

"But hopefully you won't see too much digging because what we're hoping to use is the existing Telstra infrastructure," Mr Quigley said.

Despite fears from Jamberoo residents outside the fibre area fixed wireless and satellite technology would not work with the valley's topography, the NBN chief said they should not be concerned.

"Our objective set by the federal government is that we provide a service to every premise in the country no matter what, whether it be fibre, fixed wireless or satellite," he said.

He assured waiting residents NBN Co's $620 million investment in two Ka-band satellites would mean satellite recipients would receive ADSL2+ speeds or better.

"These are big, powerful satellites - 6.3 tonnes sitting 36,000km above the Earth, but light goes fast," he said.

However, Mr Quigley could not give a date for the Gerringong and Gerroa rollout.

"I did hear from the mayor on importance of bringing the NBN to Gerringong and Gerroa, that's a strong message I took away," he said.

"The issue we have got is that this is a massive engineering project, it needs a solid job and we simply can't do it everywhere in Australia at once, we'll move just as fast as we can."