An outage at the State Communications Centre in Hobart meant a gap between calls being received and ambulances being dispatched for around 35 minutes.

Ambulance Tasmania chief executive Dominic Morgan said only two calls were affected, one of which was a fatal cardiac arrest.

However, Mr Morgan said there was no information to suggest the person would not have died if there was not an outage.

He said there would be a full review of the incident.

"I want to assure Tasmanians that every measure is being taken to ensure we fully understand the reasons for the outage and ensure it doesn't happen again," Mr Morgan said.

The communications centre and ambulance headquarters was built in 2010 at a cost of around $5.6 million.