More than 10 million Optus customers were caught up in the network collapse, while hospitals, banks, and government departments were also affected.
“It is critical that industry and government take stock following large-scale outages, given no network is immune,” Communications Minister Michelle Rowland said in a statement announcing the review.
No timeline for the investigation has been given.
Optus has been so far unable to explain the cause of the crash that took place at about 4am yesterday, pointing only to a technical fault.
However, the Department of Home Affairs has said it wasn’t believed to be a cyber-attack.
The big four banks all experienced connectivity issues due to the fallout, while Melbourne’s metro rail network endured a brief shutdown in the early morning.
Some mobile calls to Triple Zero were affected, and Optus landlines were cut off from contacting emergency services.
Mobile phones from the past 30 years
9News tech expert Trevor Long said Optus’ continued silence around the cause of the fault was a problem.
“They fixed it, so they know what the problem is and where the problem is,” he told Today,
“They need to tell us what it was because the customers deserve an answer.”
He said it was a “massive failure” of Optus’ network design.