A power outage that affected Victoria's triple zero emergency call system overnight is under investigation this morning.

In a statement, a Triple Zero Victoria spokesperson said despite the outage emergency calls from the community were continued to be taken "throughout a power issue that caused an unplanned outage of Computer Aided Dispatch system at 12.30am".

"Usual backup measures were enacted to minimise impact to the community until CAD resumed normal operations, and the cause of the power issue is being investigated," the spokesperson said.

"Our staff are highly trained in Victoria's CAD backup procedures, which are consistent with all other Australian jurisdictions."

9news.com.au has also contacted the federal Department of Communications for comment.

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