1 Introdution
2
Scope
3
Required information and information handling
4
Description of ISDN-ISDN interworking configurations
4.1 ISDN-ISDN interface where circuit mode bearer services are
provided by both ISDNs
4.2 ISDN-ISDN
Interface where both ISDNs provide X.31 case B based packet mode bearer
services
4.3 ISDN-ISDN interface where a circuit mode bearer service is
provided by one ISDN to access either a PSPDN, or a PH and an X.31 case B packet
mode bearer service provided by another ISDN
4.4 ISDN-ISDN interworking via a transit network
4.5 ISDN-ISDN interface for additional packet mode bearer services
4.6 ISDN-ISDN interface where an X.31 case B based packet mode
bearer service is provided on one ISDN and an additional packet mode bearer
service is requested on another ISDN
4.7 ISDN-ISDN interface for circuit mode to additional packet mode
service
5
Interworking functions
5.1 Echo control processing and speech processing
5.2 Generation of in-band tones and announcements for speech and
3.1 kHz audio bearer services
5.3 Call negotiation between ISDNs
5.4 Compatibility checking between end users of different ISDNs
6
Functional interworking requirements for data transmission services
7
References
Appendix I – ISDN connections involving restricted 64 kbit/s transfer
capability
I.1 General
I.2 Interworking with ISDNs providing restricted 64 kbit/s
1.3 Considerations for terminal designed to operate with
restricted 64 kbit/s transfer capability