CONTENTS

�1���� Scope
�2���� References
�3���� Definitions
�4���� Abbreviations
�5���� Description
�6���� Operational requirements
������� 6.1���� Provision and withdrawal
������� 6.2���� Requirements at the originating network side
������� 6.3���� Requirements at the terminating network side
�7���� Primitive and state definitions
������� 7.1���� Primitive definitions
������� 7.2���� Call states
�8���� Coding requirements
������� 8.1���� Messages
������� 8.2���� Information elements
�9���� Signalling procedures at the coincident S_B and T_B reference point
������� 9.1���� Call/connection establishment at the originating interface
������� 9.2���� Call/connection establishment at the destination interface
������ �9.3���� Handling of specific error conditions
10���� Signalling procedures at the T_B reference point for interworking with private B-ISDNs
11���� Interworking with other networks
������ 11.1���� Interaction with entities which do not support the ABR ATM transfer capability
������ 11.2���� Interworking with N-ISDN
12���� Interactions with supplementary services
13���� Parameters and timers
14���� Dynamic description (SDLs)
Annex A � Valid combinations of traffic-related parameters for the support� of ABR transfer capability
Annex B � Handling of the cumulative RM fixed round-trip time parameter
������� B.1���� General
������� B.2���� Handling of the cumulative RM fixed round-trip time parameter
Appendix I � Instruction indicators