European standard internal telephone number 2222 for in-hospital emergency calls: A national survey in all French military training hospitals

•A broad heterogeneity persists in alert system: six different phone numbers were found to call for help in in the different French military training hospital.•The European standard phone number “2222” for in-hospital emergencies was first launched in France in two French military training hospital.•Worldwide diffusion of a standard phone number for in-hospital emergencies could improve quality and efficiency of care.