A significant outage at Telstra, Australia's largest telecommunications company, began at 04:30 local time on Wednesday, disrupting mobile calls, data services, and train operations nationwide. The issue was traced to software defects related to time-keeping servers at data centres in Sydney and Melbourne, with Telstra confirming it was not a cyber attack. Services were fully restored approximately 12 hours later.

Telstra's chief financial officer, Michael Ackland, apologized for the disruption and stated the company conducted welfare checks on customers who attempted to contact emergency services during the outage, with six individuals requiring immediate assistance. Ackland emphasized that "Australia can absolutely have faith in its biggest telco... we take these outages very very seriously."

Australia's Prime Minister Anthony Albanese described the outage as "deeply concerning," while Communications Minister Anika Wells announced that the Australian Communication and Media Authority, the country's telecommunications regulator, will investigate the incident.

The outage has raised alarm due to a similar event last September involving Optus, Australia's second-largest telecom provider, which led to three deaths after emergency calls were blocked for 13 hours across more than half the country. Optus was previously fined for a 2023 outage that also left thousands unable to reach emergency services.

Sources