The communications regulator has announced legal action against Optus over a deadly 2025 triple-0 outage. The communications regulator has announced legal action against Optus over a deadly 2025 triple-0 outage. Credit: News Corp AustraliaAustralia’s telecommunication regulator has revealed it has commenced legal action against Optus over a deadly triple-0 outage. ACMA chair Nerida O’Loughlin said access to emergency call services was “essential to protect the Australian public”. The legal action follows a 14-hour outage for Optus customers that began shortly after midnight on September 18 and left some customers unable to reach emergency services.