Telstra CEO Vicki Brady told reporters on Wednesday that an independent investigation has identified a technical fault in the company’s network timing system as the trigger for the massive mobile outage that struck Australia in early July.

Review finds timing‑system error

The external review, commissioned under a Senate inquiry, concluded that incorrect date information was inadvertently pushed through parts of Telstra’s mobile network after scheduled maintenance on the timing system. The faulty data spread across the network, causing the widespread service disruption.

Brady said the findings line up with Telstra’s original explanation and confirm that the outage should not have happened. “The findings released today help explain why it did,” she said.

Operational gaps slowed response

While Telstra ultimately restored service and managed the recovery, the report highlighted “gaps in ownership, visibility and operational support” for the timing system. Those gaps, according to Brady, delayed the company’s ability to pinpoint the problem in the early stages of the outage.

Telstra did not treat the timing system as a critical network capability, a point the review noted as a shortfall. The company has accepted the review’s recommendations and plans to implement them, adding that the changes are not expected to affect its full‑year 2027 outlook.

Broader telecom scrutiny

The incident adds to growing scrutiny of Australia’s telecom sector after a series of high‑profile disruptions, including a 13‑hour outage at Singtel‑owned Optus last year that impacted emergency calling.

Brady, who joined Telstra in 2016 from Optus, emphasized the company’s commitment to improving network resilience and preventing similar failures in the future.

Original reporting: Appleton, WI News Feed (HLL/CB) — read the source article.