A huge Optus outage is currently affecting Australians across the country, with the telecommunications blackout causing major delays for commuters and impacting health services.
According to Downdetector, reports of the outage started about 4am on Wednesday.
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Issues with the network have been reported across the country in Perth, Melbourne, Brisbane, Sydney and Adelaide.
Melbourne’s entire train network was shut down due to the outage, however, has now resumed but with major delays expected.
“Train services have resumed across the Metro network after an earlier communications outage,” Metro Trains said.
“There are major delays to all lines as we restore services with select alterations and cancellations.
“Listen for announcements and check displays.”
7NEWS understands the temporary shutdown was due to safety issues arising from an inability for train drivers to communicate with each other and their depots.
Several hospitals in Melbourne have also been affected, with Northern Health saying the phone lines at several of its campuses were down.
“This includes phone lines into Northern Hospital Epping, Broadmeadows Hospital, Bundoora Centre, Craigieburn Centre, Kilmore District Hospital, and Victorian Virtual Emergency Department (VVED),” it said.
“We apologise for any inconvenience.”
Several other providers on the Optus network such as Moose Mobile, Dodo, Coles Mobile and Amaysim appear to also be impacted.
Some customers complained of issues with their mobile service via social media platform X, formerly known as Twitter, with one dubbing the outage an “absolute failure”.
Another said: “How is it possible that the entire country could have no Optus? I have no phone coverage at all.”
“What is going on with Optus this morning? Woke up and phone not working. No email or comms from the company either. Poor form,” one customer said.
Optus told 7NEWS it was aware of the issue.
“We are currently working to identify the cause and apologise for any inconvenience,” a spokesperson said.
“In case of an emergency, customers can still call 000.”
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