CCITT Rec. X.321 (11/1988) – GENERAL ARRANGEMENTS FOR INTERWORKING BETWEEN INTEGRATED SERVICES DIGITAL NETWORKS (ISDNs) FOR THE PROVISION OF DATA TRANSMISSION SERVICES
CONTENTS
0 Introduction
1 Scope and field of application
2 References
3 Definitions
4 Abbreviations
5 General aspects
5.1 CSPDN
5.2 ISDN
5.3 Call control between the CSPDN and ISDN
5.4 Functionalities of the CSPDN and ISDN
6 Specific interworking arrangements
6.1 Interworking between CSPDN and ISDN where a packet switched bearer is requested
6.2 Interworking between a CSPDN and ISDN where a circuit switched bearer is requested