Technologies de l'information — Utilisation du protocole X.25 de couche de paquet pour fournir le service réseau OSI en mode connexion sur le réseau téléphonique

Applies to environments including telephone network leased circuit connection between two DTEs; telephone network switched connection between two DTEs; DTE access to a PSDN via a telephone network leased circuit connection; DTE access to a PSDN via a telephone network switched connection. Provision is achieved by specifying the mapping of the CONS primitives and parameters to and from the elements of the protocols used.