Information technology — Use of X.25 Packet Layer Protocol to provide the OSI connection-mode Network Service over the telephone network

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.