Optus is set to be sued after a major network outage left hundreds of Triple Zero emergency calls unable to get through, with the failure linked to at least one death. The case, expected to be heard in Australia's Federal Court, follows scrutiny from the communications regulator over the telecom giant's handling of the outage and its obligations to keep emergency call services running at all times.

The outage affected Optus customers across several Australian states, cutting off access to police, fire and ambulance services for an extended period before being resolved. Regulatory and legal action has centred on why backup systems failed to prevent the disruption and whether Optus met its legal duty to maintain uninterrupted emergency call access, with the company facing potential penalties and compensation claims over the harm caused.