Optus has apologised for a second service outage in less than a fortnight.

The issue involved a mobile phone tower — one of 9000 across Australia — in Dapto, a suburb of Wollongong, NSW .

“Optus is investigating an issue today involving a mobile phone tower site in the Dapto area in NSW ,” an Optus spokesperson said late on Sunday night.

“While all services have been restored, we are investigating the impact of the issue on calls made between 3am and 12.20pm today, including calls made to the Triple Zero network, and where necessary we are working with the police as part of the Triple Zero welfare check process.

“We apologise to any customers who have been impacted and will provide a further update as appropriate.”

Earlier this month, a botched firewall update blocked 600 Triple-

See Full Page