DATA STORAGE SYSTEMS

摘要

IMPROVEMENTS IN OR RELATING TO DATA STORAGE SYSTEMS Queuing of interexchange messages in a multi-exchange digital telecommunication is provided using a dynamic store into cells of which the messages are placed. A subsidiary control store has a cell for each cell of the message store and each of these cells contains a control word which contains the status-busy/free of its message cell, plus details of the message including the user for which it is stored when the cell is busy. These details include message priorities, so that queues of messages awaiting attention can be assembled in the store.