CONTENTS

 1     Scope  1
 2     References  1
 3     Terms and Definitions       2
 4     Abbreviations    2
 5     Conventions      3
 6     Reference Configurations  3
        6.1     Case where B-ISDN provides PVC           3
        6.2     Case where B-ISDN provides SVC           4
 7     Service parameters and Service quality      5
        7.1     Peak cell rate          5
        7.2     Service quality        5
 8     Addressing and routing aspects     6
 9     Physical layer     6
10     ATM layer6
11     ATM Adaptation layer     6
       11.1     U-plane  6
       11.2     C-plane  6
12     Signalling procedures       6
       12.1     General  6
       12.2     Outgoing X.76 Call            7
       12.3     Incoming X.76 Call            7
       12.4     ATM Switched Virtual Channel Connection Clearing          8
       12.5     Restart Procedures            8
       12.6     Handling of Error condition            8
13     ATM-adaptor functionalities        9
       13.1     General  9
       13.2     Physical interface   10
                      13.3     Mapping of signalling information and procedures between the X.76 interface and the S_B/T_B reference point     10
       13.4     Synchronization     10
       13.5     Maintenance          10
       Annex A  X.78 example message flow diagrams     10
        A.1     X.78 call setup message flow sequences     10
        A.2     X.78 call releasing message flow sequences            12
        A.3     X.78 restart message flow sequences         12
                Annex B  The mapping of Q.2931 Cause information element identifier field to X.76 cause     16