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Exclusive: Despite being signed up to a new alert system, the South Australian emergency service was not notified during September’s triple zero outage Follow our Australia news live blog for latest updates Get our breaking news email , free app or daily news podcast South Australia’s ambulance service was signed up to a new system that is supposed to send notifications when Optus has a triple zero outage, but says it was not notified during the outage last month. September’s triple zero outage was caused by a network firewall upgrade which blocked emergency calls for Optus customers in South Australia, Western Australia, the Northern Territory and parts of New South Wales. The outage has been linked to the deaths of two people in SA and one in WA. A fourth death, of an infant in SA, was found to be… (Updated 3 Oct 2025, 07:59 IST; source: link)