Correspondence Between 28 September 2025 And 29 September 2025 Between Optus And The Department About The Optus Triple-0 Outage In NSW On 28 September 2025 Including Possible Cause/s Of The Outage…

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On 28 September 2025, Optus experienced a network outage in NSW that prevented emergency Triple-0 calls from being routed through to emergency services. Department of Infrastructure correspondence from 29 September reveals senior government concern about Optus's failure to pass emergency calls to other networks during the outage. The First Assistant Secretary of Communications Services requested urgent clarification from Optus on whether all Triple-0 calls failed or if some succeeded depending on device type, and demanded assurance that the company understands the technical cause and is implementing remediation. The government expressed alarm that routine tower outages could result in failed emergency calls and sought confirmation Optus would prevent future occurrences, citing both regulatory obligations and broader public safety requirements.