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“My understanding also is that there are some services that have been restored, so there may be some sort of what we call redundancy or backup communications that’s been enabled in that system,” Rowland told ABC Radio National.
Metro Trains confirmed its backup system used the mobile network and was affected by the Optus outage.
An Optus spokesperson said it was aware of an issue that may be impacting some mobile and internet customers.
“We are currently working to identify the cause and apologise for any inconvenience,” the spokesperson said.
Phone lines down at multiple hospitals, Uber surge
Melbourne hospitals were also among those affected, with Northern Health reporting phone lines were down at Northern Hospital Epping, Broadmeadows Hospital, Bundoora Centre, Craigieburn Centre, Kilmore District Hospital and Victorian Virtual Emergency Department.
Ridesharing operator Uber experienced a surge in demand on Wednesday morning as a result of the train delays. Some customers were charged double their usual fare.
Metro Trains has advised commuters to listen for announcements at stations regarding cancellations or delays during Wednesday morning travel.
“Train services are now resuming across the Metro network after an earlier communications outage,” Mero Trains said.
“We are expecting major delays to all lines as we restore services. Please listen for announcements and speak to staff for more information.”
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