ENV 41005 : DRAFT 1990

1 SCOPE
2 FIELD OF APPLICATION
3 CONFORMANCE
4 REFERENCES
5 DEFINITIONS
  5.1 Private Telecommunication Network
      Exchange (PTNX)
  5.2 Private Telecommunication Network
      (PTN)
6 GENERAL PRINCIPLES AND REQUIREMENTS
  6.1 Classification of Services
  6.2 Basic Call
7 THE THREE-STAGE SPECIFICATION METHOD
  7.1 Stage 1 of the Method
  7.2 Stage 2 of the Method
      7.2.1 Functional Entities
      7.2.2 Functional Model
      7.2.3 Information Flows
      7.2.4 Sequences of Information Flows
      7.2.5 Functional Entities involved in a Basic Call
      7.2.6 Relationship between Supplementary Service
            and Basic Call Functional Entities
  7.3 Stage 3 of the Method
ANNEX A: (Informative) Informative References
ANNEX B: (Informative) Examples of Interworking for Basic
                       Calls and Supplementary Services between
                       PTN and Public ISDN
ANNEX C: (Normative) List of Acronyms and Abbreviations