The telco will face a grilling from politicians about this week's nationwide outage that brought businesses and transport systems into chaos.

Telstra is investigating what caused a national outage that stopped trains, transactions and some Triple Zero calls.

Telstra has defended its communication process, insisting the government and other stakeholders were informed "very, very early" in the morning.

Australia's biggest telecoms company said on Wednesday it was urgently investigating the cause of a nationwide outage that cut mobile and internet services for thousands of…

The telco says a “secondary issue” is stopping some Triple Zero calls from connecting, hours after it declared the day’s outage resolved.

Police in several states are checking on people who could not reach Triple Zero, after a second fault overnight again stopped some emergency calls.

Some Triple Zero calls are still experiencing issues, Telstra says, as it races to fix a second network issue.

More than 20 of the 300 Triple Zero calls that failed during the nationwide outage were from Queensland, with Telstra confirming a second issue had threatened emergency calls…

Sarah Henderson's emergency service test is under scrutiny as Telstra says customers can now "feel confident" calling triple zero.

Carrier says some still unable to connect to emergency hotline a day after mobile network went down

Telstra remains under fire after callers were again unable to contact Triple Zero once again.

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Telstra boss Vicki Brady has apologised for this week’s mass outage, as Communications Minister Anika Wells vowed the government would hold the telco to account.

The telco will face a grilling from politicians about this week's nationwide outage that brought businesses and transport systems into chaos.

Fallout over the telco’s latest national outage continues, with executives called to front a snap meeting of a triple-zero parliamentary inquiry

Greens senator and inquiry chair Sarah Hanson-Young has threatened a crackdown on telco giants responsible for multiple outages in the past few years.