1 Scope
2
Normative references
3
Definitions, symbols and abbreviations
3.1 Definitions
3.2 Abbreviations
4
General considerations
4.1 General
4.2 Working assumptions
5
Miscellaneous interworking aspects
5.1 Interworking handling of the echo control device indicator (or
the incoming half echo suppressor indicator) of the Address Complete Message
(ACM) in ISUP (or TUP)
5.1.1 Call originating from ISUP to R2, No. 5
5.1.2 Call originating from ISUP to TUP
5.1.3 Call originating from TUP to ISUP
5.2 Handling of the called party's category and the charge
indicator in case of a call originating from TUP to ISUP
5.3 Transfer of no charge or charge information in the answer
message in case of a call originating from TUP to ISUP
5.4 Simple segmentation
6
Interworking
6.1 Call originating from SS ISUP to Signalling System No. 5
6.1.1 Forward direction
6.1.2 Backward direction
6.1.3 Considerations on supplementary services
6.2 Call originating from SS ISUP to SS R2
6.2.1 Forward direction
6.2.2 Backward direction
6.2.3 Considerations on supplementary services
6.3 Call originating from SS ISUP to SS TUP
6.3.1 Forward direction
6.3.2 Backward
direction
6.3.3 Considerations on supplementary services
6.4 Call originating from Signalling System No. 5
to SS ISUP
6.4.1 Forward direction
6.4.2 Backward direction
6.4.3 Considerations on supplementary services
6.5 Call originating from SS R2 to SS ISUP
6.5.1 Forward direction
6.5.2 Backward direction
6.5.3 Considerations on supplementary services
6.6 Call originating from SS TUP to SS ISUP
6.6.1 Forward direction
6.6.2 Backward direction
6.6.3 Considerations on Supplementary Services
Appendix I – Echo control procedure in case of interworking
I.1 Call originating from No. 5, R2 to ISUP
I.1.1 Forward direction
I.1.2 Backward direction
I.2 Call originating from ISUP to No. 5, R2
I.3 Examples