CCITT Rec. I.320 (11/1988) – ISDN PROTOCOL REFERENCE MODEL
1 Introduction
2 Modelling concepts
2.1 Relationship with the X.200-Series
2.2 Control and user planes
2.3 Local and global significance
3 Model
3.1 Generic protocol block
3.2 Relations between layers in one plane
3.3 Relations between planes
3.4 Data flow modelling
4 ISDN management
5 Interworking
5.1 General
5.2 Relationships with the OSI RM
6 Examples
6.1 Basic call situations (no supplementary service, no
interworking)
6.2 More elaborate situations
6.3 Interworking