�1���� Scope
�2����
Normative references
������� 2.1���� Identical Recommendations | International Standards
������� 2.2���� Paired Recommendations | International Standards identical in
technical content
������� 2.3���� Additional references
�3 ����Definitions
������� 3.1���� Reference model definitions
������� 3.2���� Network layer architecture definitions
������� 3.3���� Network layer addressing definitions
�4����
Abbreviations
�5����
Subnetwork dependent convergence function
������� 5.1���� General model
������� 5.2���� Subnetwork user data
������� 5.3���� Subnetwork dependent convergence functions used with ISDN
circuit-switched B-channel
�6����
Conformance
������� 6.1���� Static conformance
������� 6.2���� Dynamic conformance
������� 6.3���� PICS proforma
Annex A � PICS proforma
������� A.1���� Introduction
������� A.2���� Abbreviations and special symbols
������� A.3���� Instructions for completing the PICS proforma
������� A.4���� Identification
������� A.5���� Subnetwork dependent convergence functions for use with X.25
subnetworks