Optus is investigating a fresh triple-zero outage, this time in Illawarra region of New South Wales .

The telco said an issue with a mobile phone tower in Dapto had affected calls made between 3am and 12.20pm on Sunday, including those to the triple-zero network.

Nine triple-zero call failures were identified, including a caller who required an ambulance. That person had used another phone to contact emergency services, Optus said. Chris’s triple-zero calls were met with silence. Now out of hospital, he wants Optus to know lives are at stake Read more

Sign up: AU Breaking News email

Four of the failed calls were referred to NSW police to undertake welfare checks.

Optus said it had confirmed the welfare of all callers who tried to use the triple-zero network during the outage.

See Full Page