2023 Optus outage
On 8 November 2023, an unplanned network outage occurred, consisting of all Optus internet, cellular and fixed-line services in Australia at 04:05 AEDT. The outage caused disruption across government and corporate sectors including hospitals, banks, train services, EFTPOS payment systems, and calls to emergency services. Restoration was gradual with some services being restored around 13:00 AEDT. The outage directly affected more than 10 million people and 400,000 businesses across Australia.