NBN Co will begin using alternative technologies to roll out the national broadband network from next year, the company says.

In its first half-year results briefing, held in a bid to shine more transparency on the politically divisive project, NBN Co said its capital expenditure increased by $396 million to $1.2 billion in the six months to December 2013, as it continued to roll out fibre cabling to homes and businesses.

Revenues also rose to $47.8 million, up from $29.3 million in the prior corresponding period.

Much of the boost in revenues came from a fourfold increase in money taken in from telecommunications, which lifted to $21.8 million, half of which came from homes and businesses on the fibre aspect of the network.

Revenue generated from the 130,759 homes and businesses connected to the network, up from 70,100 in the half, averaged out to $36.50 per user.