Train and method for safely determining the configuration of such a train

A method for determining the configuration of a train is provided. The train includes one safety management' device per unit, each device having two designated identifiers, one coupling communication for each pair of adjacent unit and a general network for connecting all the devices to each other. The method includes transmitting, over the general network and over each coupling communication link, with at least one device, a secured message to one of the adjacent devices to the device, the message including one of the identifiers of the device transmitting, over the general network, with each device having received an identifier of another connected through a coupling communication link, at least one restoration message including both identifiers of the device as well as the received identifier, receiving, with each device, the transmitted restoration messages, and determining, with at least one device, the configuration of the train.