Telecommunication system including a central back-up memory.

摘要

Telephone network comprised of a plurality of nodes (KNE) which are coupled to each other by means of transmission lines (TL), each node comprising a switching module (SN), a central module (CM) and at least one peripheral module (PM) and an operational maintenance control unit (OM), which can supply a command consisting of a sequence of sub-commands for changing the data in one or more nodes in the network being coupled to one of the nodes, there being coupled to one of the nodes a central back-up memory (BUD) containing a network register (NJ) for the sub-commands which are common to all the nodes of the network, local registers (UJ) for specific sub-commands for always one node, one local register being provided for each node, and also a sequence number Table (SN) from which a unique sequence numbe r can be assigned to each sub-command intended for storage either in the network register or in one of the local registers and a last relevant sequence number Table (LRSN) of the sub-command last registered for each of the node units being included, the sub-commands being stored in the relevant registers as soon as the operational maintenance command is produced by the control unit and before these sub-commands are transferred to the relevant node units.