Telstra outage causes chaos across the country | ABC NEWS

Telstra says its services have been mostly restored after its network suffered a major, nationwide outage that left potentially millions of Australians unable to make phone calls or access the internet.

Earlier on Wednesday, the outage affected payment systems and public transport across the country, with regional rail lines in NSW and Victoria, and the ACT's MyWay+ ticketing system, among those services affected.

Hundreds of traffic lights in South Australia were also struck, operating on basic programming rather than responding to traffic conditions.

Users of other mobile providers that operate on Telstra's network, including Boost, Aldi, Tangerine, Belong and Everyday Mobile, also reported outages.

Police in Western Australia posted a statement on Facebook saying the outage appeared to have affected some Triple Zero calls, advising people with "a vulnerable family member, friend, neighbour or co-worker" to "consider offering support during the service disruption".

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