The CEO of Optus, Kelly Bayer Rosmarin, will face a Senate hearing following a network crash that left millions of Australians without mobile or broadband coverage. She has been criticized for her response to the outage and is considering stepping down as CEO. The outage affected individuals, businesses, and even health and government services. The cause of the outage was changes to routing information from an international peering network following a routine software upgrade. The Department of Home Affairs has ruled out a cyber-attack as the cause.