• 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