node of the system utilizing message based synchronization to the external system the synchronization status data is converted from the message based synchronization signature transmitted by the interface node in such a manner that the level in the internal synchronization hierarchy of the external system as indicated by the synchronization status transmittd to the external system rises or falls corresponding to the rise and correspondingly fall of a predetermined magnitude of the level indicated by the message based synchronization signature application_number US 70267896 A description fig2 illustrates a system employing self organizing master slave synchronization soms which is a message based synchronizing method known per se in this specific case the system comprises five nodes or devices assigned soms addresses indicated by the reference numerals 1 5 according to their level of hierarchy the master node of the system has the smallest soms address the nodes interchange messages containing such soms addresses in this way the nodes are able to identify each other by means of the address numbers and establish a synchronization hierarchy so that the whole network can synchronize itself with the master node as mentioned above messages transmitted continually in the network are dependent on the applied message based synchronization method in addition the messages are specific for each transmitting node in the soms network a.