�0���� General
�1����
X.25 virtual call and permanent virtual circuit bearer service
������� 1.1���� Scope
������� 1.2���� References
������� 1.3���� Definitions
������� 1.4���� Symbols and abbreviations
������� 1.5���� Description (I.232.1)
���� ���1.6���� Derivation of the
functional model
������� 1.7���� Information flows
������� 1.8���� SDL diagrams for functional entities
������� 1.9���� Functional entity actions (FEAs)
������ 1.10���� Allocation of functions to physical entities
�2����
Frame mode virtual call and permanent virtual circuit bearer services
������� 2.1���� Scope
������� 2.2���� References
������� 2.3���� Definitions
������� 2.4���� Symbols and abbreviations
������� 2.5���� Description
������� 2.6���� Derivation of the functional model
������� 2.7���� Information flows
������� 2.8���� SDL diagrams for functional entities
������� 2.9���� Functional entity actions (FEAs)
������ 2.10���� Allocation of functions to physical entities