What happened

Telstra's nationwide mobile outage began at 02:50 AEST on 8 July and affected about 45% of calls and data sessions on Australia's largest mobile network. An independent Technology Audit Partners review found that maintenance to replace a faulty power supply reset a GPS card's date to 2006; the incorrect time propagated through the network and caused failures. The review identified an undocumented 2025 design change, an overdue GPS-card software update, weak ownership of the Network Time Protocol system, early alarms that were not monitored outside business hours and insufficient specialist staffing. Telstra had previously reported 604 failed Triple Zero emergency calls; the review identified eight more, bringing the reported total to 612. Telstra said welfare checks found no adverse outcomes. The outage also disrupted regional rail communications, electronic payments and businesses. This was a preventable operational and governance failure, not a cyberattack or malicious act. The 2 September article reports the investigation's findings rather than a new outage. The marker indicates Melbourne, where the initiating timing-system maintenance occurred, but the service impact was nationwide.

When cited sources give different casualty, damage or spill figures for this event, they’re reported side by side above rather than merged into one number. See how confidence levels work.