CONTENTS

1 SCOPE
2 References
3 Terms and definitions
4 Abbreviations
5 General service aspects
6 Reference configurations
6.1 Configuration when accessing PSPDN via a B-ISDN
6.2 Configuration when accessing the packet switched data transmission services of an ISDN via a B-ISDN
7 Service aspects
7.1 General
7.2 Service characteristics
7.3 User access capabilities
8 Addressing and routing aspects
8.1 Outgoing calls
8.1.1 Access unit selection
8.1.2 Addressing scheme
8.2 Incoming calls
8.2.1 Access unit selection
8.2.1.1 Access unit selection by PSPDN (Type A)
8.2.1.2 Access unit selection by ISDN (Type B)
8.2.2 Addressing scheme
8.2.3 Called TE/X.25 DTE+TA interface selection
9 Interworking with dedicated networks
9.1 General
9.2 Access to PSDTS via a B-ISDN
10 Procedures
10.1 General
10.2 Procedures
10.2.1 Outgoing call
10.2.1.1 Outgoing ATM switched virtual channel connection
10.2.1.2 Outgoing X.25 virtual call setup and release
10.2.2 Incoming call
10.2.2.1 Incoming ATM switched virtual channel connection
10.2.2.2 Incoming X.25 virtual call setup and release
10.3 ATM switched virtual channel connection clearing
10.3.1 Clearing initiated by the TE/X.25 DTE+TA
10.3.2 Clearing initiated by the PSDTS AU
10.4 ATM switched virtual channel connection clear collision
10.5 Restart procedures
10.6 Handling of error conditions
10.7 ATM PVC management procedure
11 Terminal adaptor functionalities
11.1 General
11.2 Access to PSDTS via a B-ISDN
11.2.1 Physical interfaces
11.2.2 Rate adaption
11.2.3 Layer 2 adaption
11.2.4 Signalling
11.2.4.1 Outgoing call
11.2.4.2 Incoming call
11.2.4.3 Call clearing
11.2.5 Synchronization
11.2.6 Maintenance
Annex A The mappings Q.2931 cause field to Recommendation X.25
Appendix I Example of sequence diagrams
I.1 Example sequence diagrams
I.2 Key to the figures
I.3 Example of sequence diagrams