Aujourd’hui le RNIS professionnel: Transcom et transdyn

This paper considers the present development of isdn in France. Two main components are used to already offer isdn services to big business users: rtc 64 and Telecom 1. Those two services, Transcom and Transdyn, have been defined to fullfill big business users needs and constitute the French first phase isdn. In a second part the article considers the evolution of this first phase isdn towards the progressive generalisation of isdn. Two points are then considered: inter-working between Telecom 1 satellite network and second phase isdn and development of reservation service. As a conclusion the paper describes some of the practical experiment gained in those already existing isdn services.