CONTENTS

 1     Scope
 2     References
 3     Definitions
 4     Abbreviations
 5     Introduction
        5.1     Possible solutions
        5.2     Communication scenarios
 6     N-ISDN (64 kbit/s based) interface requirements
        6.1     Scenario A
                  6.1.1     Introduction
                  6.1.2     Emulation of the B and D channels
                  6.1.3     Emulation of the basic and primary rate access
        6.2     Scenario B
        6.3     Interworking requirements for access signalling
        6.4     Interworking requirements for network signalling
 7     Interworking of release 1 and release 2
        7.1     Requirements for B-ISDN signalling protocol evolution
        7.2     Scenarios for interworking
                  7.2.1     Scenario A – Communication between a release 1 exchange/terminal and a release 2/3 exchange/terminal
                  7.2.2     Scenario B – Communication between two release 2 exchange/terminal in case of a release 1 service request
                  7.2.3     Scenario C – Communication between two release 2 exchange/terminal in case of a release 2/3 service request
                  7.2.4     Scenario D – Communication via a version 1 transit node for release 2/3 services.
        7.3     Support of release 2 services by using release 1 equipment