Plans and principles for public data switched networks in France

The principles of new switched data networks planned in France are explained together with a short survey of the present state of the art. Basic techniques, offered services, compatibility with telephone, envelope concept, synchronization, and international compatibility are covered. The general ideas underlying the outline of its implementation are given but many technical details are still under study both in the French Post, Telegraph, and Telephone (PTT) Administration and in international bodies such as the International Telegraph and Telephone Consultative Committee (CCITT). Such studies, made by various administrations in Europe, should lead to new possibilities by sharing many features which are presently afforded within private networks, but interchange of information between potential users and administrations should throw light on the extent with which many services should be offered.