Multiple people were left unable to contact triple zero after another Optus outage, this time in New South Wales over the weekend.

An Optus spokesperson said there had been "an issue involving a mobile phone tower site" in the Dapto region.

The outage affected calls between 3am and 12.20pm yesterday, including nine calls to the emergency hotline.

Optus said all people who attempted to contact triple zero were "okay".

Several of the emergency calls were accidental or test calls.

About 4500 people were affected by the outage, but the Optus spokesperson said services had been restored.

The weekend outage comes just days after a major outage earlier this month that has been linked to multiple deaths.

Hundreds of emergency phone callers were left unconnected across multiple state

See Full Page