�1���� Introdution
�2����
Scope
�3����
Abbreviations
�4����
Definitions
������� 4.1���� Definitions related to services and network capabilities
������� 4.2���� Definitions related to general ISDN interworking
configurations
�5����
Telecommunication services to be supported by ISDN interworking
configurations
�6����
ISDN interworking configurations
������� 6.1���� Reference points for network interconnections
������� 6.2���� ISDN-to-ISDN interconnection
������� 6.3���� Interworking between ISDNs and other networks
������� 6.4���� ISDN internal interworking
������� 6.5���� Network concatenation configurations
�7����
Interworking functional requirements � General aspects
������� 7.1���� Categories of interworking functions
������� 7.2���� Mapping principles
������� 7.3���� Guidelines on the description of mapping functions
������� 7.4���� Functional requirements for lower layer service interworking
������� 7.5���� Functional requirements for higher layer service interworking
�8����
General aspects of selection mechanisms for interworking functions