A communications fault halted Victoria's V/Line services early Wednesday morning, with delays expected as trains resume.
The rail network tweeted about 5am that no services were operating across all lines, but a Department of Transport update two hours later indicated some improvement.
"Following a communications outage which resulted in a suspension of V/Line services, a temporary fix has been found to allow trains to resume across the network," the department said.
"Significant delays are likely throughout the morning as services get back into position for the normal timetable.
"Some services may be replaced by coaches.
"Passengers are urged to check the V/Line website before travelling.
"The Department of Transport and V/Line thank passengers for their patience."
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