The McGowan Government is pushing ahead with its contract with Chinese telecommunications company Huawei to build a new digital radio system for Perth's trains, saying it has received assurances from the company.

Key points: Huawei has told the Government it will be able to source equipment for the project

Huawei has told the Government it will be able to source equipment for the project Allegations by the US had led to greater scrutiny of how the firm does business

Allegations by the US had led to greater scrutiny of how the firm does business The Opposition wants correspondence from Huawei over the contract made public

Transport Minister Rita Saffioti had asked Huawei whether it could deliver the $200 million contract after the US Government unsealed two indictments against the company in January.

The Public Transport Authority (PTA) awarded the contracts for the 4G project's design, build and maintenance to a joint venture between Huawei and UGL in July 2018, after expressions of interest were sought the previous year.

Ms Saffioti has told Parliament that at her request, senior PTA staff met in February with eight senior Huawei and UGL staff, including Huawei Australia chairman John Lord.

Huawei had been asked for assurances about the 4G radio network for Perth's rail system. ( ABC News: Andrew O'Connor )

"The Huawei and UGL representatives confirmed they would be able to source equipment required for the project. Further confirmation was subsequently received by the PTA," Ms Saffioti said.

"The State Government is committed to delivering this project, and making sure that the proponents deliver on their contractual obligations.

"To that end the state will continue to monitor this contract, with the involvement of other key state agencies."

The allegations by the United States Justice Department in January prompted greater scrutiny of how the Chinese tech giant does business and intensified a trade dispute between the US and China.

Security advice on Huawei followed: Saffioti

Ms Saffioti said because of the ongoing monitoring of the contract, she had been advised she could not table correspondence with the company "at this stage".

Deputy Liberal leader Lisa Harvey said the correspondence from Huawei promising it could deliver the contract should be made public, and it was typical of Ms Saffioti to "hide" it.

"That's typical of this Minister. She's very secretive," Ms Harvey said.

"We constantly have to go to the FOI commissioner, to get clearance from the FOI commissioner with respect to information she fails to provide."

The State Opposition has previously questioned the extent to which the Government consulted with security agencies over the contract, and whether it properly followed any advice.

There have also been wider concerns over whether the firm's technology would enable outside access to Australian infrastructure.

But Ms Saffioti repeated her position that the Government had sought and followed advice from Commonwealth security agencies.

No Chinese interference, Huawei says

In January, Mr Lord insisted the Chinese government had never asked nor directed Huawei to gather information for intelligence purposes in Australia.

Huawei Australia chairman John Lord met WA transport officials to discuss the contract last month. ( ABC News: Nick Haggarty )

"I have been over the last seven years involved in Huawei's highest level strategic planning groups," he said at the time.

"I've never seen any such influence. It's been free-flowing and in fact the points we address are: 'What is that country's view on X, Y and Z and how do we meet that in that country?'

"So there has been no suggestion, no inference of any Chinese interference in our operations in other countries."

The digital radio system project was separated from a broader proposed "automatic train control" project in 2013-14.

It will see Huawei build around 80 radio masts and base stations throughout the metropolitan network and replace radio devices in trains, security vehicles and handheld radios.

The network, which is due to be up and running in 2021, will be used by train drivers, as well as customer service, security and train control staff.

Ms Saffioti has previously said the radio system would be a closed network, like one in New South Wales.

"We are confident about the security aspects in relation to the system," she said.