The Federal Government is considering a plan to extend a special 457 visa program designed for the resources sector to the telecommunications industry, to allow it to expedite the import of large numbers of skilled workers.

If Victoria was not given enough priority in the early stages of National Broadband Network construction, it was because of state government inaction in the tech sector, shadow technology minister Adem Somyurek says.

The chairman of the joint parliamentary oversight committee on the NBN Rob Oakeshott says workforce-related issues arising from the $11 billion Telstra-NBN Company deal might add to the cost of the national broadband network roll-out.

The powerful joint parliamentary committee overseeing the roll-out of the national broadband network will scutinise the $11billion deal between Telstra and the NBN Company, looking at questions of risk and value for money.

The NBN Company is likely to withdraw a request for a "price shock mechanism" - which would allow it to increase prices for its wholesale services by up to five per cent above inflation - as being of little value, NBN Co chief executive Mike Quigley has told a senate committee.

As the NBN Company today released plans to roll-out its fibre network to nearly 500,000 homes in the next 12 months, the Australian Greens say Opposition leader Tony Abbott must now drop the Coalition plan to "demolish" the NBN if it is elected.

Shadow communications minister Malcolm Turnbull's private members bill seeking to force Government to conduct a cost benefit analysis of the National Broadband Network has been defeated in the lower house by a single vote.

The NBN Company business case will not be made public until next month, despite mounting pressure from the Opposition and the Greens for the release of the document.

As the political fight over the National Broadband network gathers heat, the NBN Company has moved ahead with data centre construction, contracting Cisco Systems as its equipment provider.

The communications sector's peak user interest lobby has joined the chorus of industry voices objecting to the NBN Company's points of interconnect proposals, saying it risks reducing infrastructure competition into the future.