The Vocera Communications system uses a voice-controlled badge which emergency services staff wear and which is linked to an in-house server. The system also connects to the existing PABX so staff can make and receive calls through the public telephone network.

Previously Blacktown Hospital, in Sydney's western suburbs, used a mix of mobile phones, pagers and foot soldiers to locate staff.

Professor Steven Boyages, chief executive of the Sydney West Area Health Services, said the hospital faced patient increases and limited resources in the emergency department. He said the department deals with about 90 patients a day.

The new system saved an estimated 6000 hours a year for staff with a potential cost saving of more than A$105,000 a year.

"Nurses and doctors found they were much more efficient in treating patients, because they could more easily locate members of staff, increasing their productivity and boosting overall patient care," Boyages said.