System failures and oversight gaps behind July outage
An independent investigation into Telstra's July 8 network failure has found the company did not prioritise the systems that caused the outage and lacked the technical expertise to properly maintain them, according to a report released on Tuesday.
The outage left thousands of Australians unable to make calls or access data, disrupted triple-zero emergency calls, and affected businesses, train networks, and electronic payment services, as reported by The Canberra Times, PerthNow, SBS Australia, and ABC Australia.
The review by Technology Audit Partners (TAP) identified a lack of ownership and oversight of the functions that led to the outage as key contributing factors, according to multiple sources. The report found the outage began at 2:50am, nearly an hour earlier than Telstra had previously disclosed, and was triggered after a faulty power supply was replaced that then reset a GPS card date to 2006, which flowed through the rest of the mobile network, as reported by ABC Australia.
The report, citing ABC Australia, noted that alarms that would usually alert staff to the error were only monitored during business hours by a "limited number" of people, and a lack of "knowledgeable staff" contributed to the telco taking "several hours to determine the root cause of the outage." It also noted insufficient clarity of responsibility regarding Network Time Protocol (NTP) ownership and support, and found that Telstra did not treat its timing system as a priority or as a "high risk function" of the network.
The cause, according to the report, was an undocumented design change in October and a software update that had not been done on a GPS card, as stated by ABC Australia. The report said a "Network at Risk" ticket should have been raised but this did not happen, and that in October 2025, personnel involved did not recognise the meaning of Melbourne NTP at stratum 5.
On the night of the outage, the two primary engineers involved in the botched upgrade were on mandatory stand-down, the report found, as reported by The Canberra Times, PerthNow, and SBS Australia.
Broader warnings ignored
The report also highlighted that Telstra had been warned about vulnerabilities in its timing systems months before the outage. In 2024, Australia's Cyber and Infrastructure Security Centre put out a public alert about critical infrastructure reliance on timing systems, and in October last year, another alert singled out "critical communications assets" as being dependent on timekeeping systems, according to ABC Australia.
Despite these warnings, the report found that Telstra did not treat its timing system as a critical capability, which was a primary cause of the outage, according to multiple sources.
Impact on emergency calls and compensation
The outage had a significant impact on emergency services. Telstra previously told a Senate inquiry that 604 Triple Zero calls were affected, but the TAP report found eight additional Triple Zero calls that were unable to connect during the outage, according to ABC Australia. Of these additional eight missed calls, five did not need assistance or were "misdials," one successfully "camped on" via a different network, one connected after a subsequent call, and one caller could not be identified, as reported by ABC Australia.
Following the outage, Telstra confirmed it had conducted welfare checks on those who tried to place more than 600 unsuccessful emergency calls. Since identifying the further eight unsuccessful calls, welfare checks had also been conducted with no adverse outcomes identified, according to the company, as reported by The Canberra Times, PerthNow, and SBS Australia.
Telstra chief executive Vicki Brady told media on Wednesday that "the overarching finding is we did not prioritise our timing system inside our networks at the highest level as a critical capability, which is exactly what it should have been," adding "that is a miss on our side," as quoted by The Canberra Times and PerthNow.
Ms Brady said additional resources and expertise had been allocated to the impacted area. She confirmed that "a little over" 30,000 customers have shared in roughly $1 million worth of compensation, with most receiving a $15 credit, according to ABC Australia. Any customers who felt they were impacted and had not been in contact were encouraged to reach out to the company, as reported by PerthNow and SBS Australia.
Regulatory consequences and executive accountability
Communications Minister Anika Wells said the outage showed "clear preventable failures" and should not have happened, as quoted by ABC Australia.
A separate ongoing Australian Communications and Media Authority (ACMA) investigation into the outage could result in fines of up to $30 million, as reported by The Canberra Times, PerthNow, and SBS Australia. Ms Brady said of the investigation: "From our perspective, it's far too early to reach any conclusions or estimates about what potential breaches or fines might look like."
Ms Brady was among 10 senior executives whose bonus was cut as a result of the outage, according to SBS Australia. She said, "I fully accept the board's decision on that." Ms Brady's total compensation for the year was $6.8 million, 11 per cent more than the previous year, as reported by SBS Australia.