1 Scope
2 References
3 Definitions
   3.1 External definitions
   3.2 Additional definitions
        3.2.1 Prenegotiation
4 Abbreviations
5 Description
   5.1 Overview
   5.2 Protocol model for PRN
6 Operational requirements
7 Primitive definitions and state definitions
   7.1 Service primitives
   7.2 PRN states
        7.2.1 PRN Idle
        7.2.2 PRN Initiated
        7.2.3 PRN Delivered
        7.2.4 PRN Present
        7.2.5 PRN Received
8 Coding requirements
   8.1 Abstract definition of the PRN operations
9 PRN procedures
   9.1 General
   9.2 Procedures at an originating or terminating CC
        entity
        9.2.1 Invoking the PRN operation by the initiating
              CC entity
        9.2.2 Responding to the PRN invocation
        9.2.3 Completion of PRN
        9.2.4 Error handling
        9.2.5 Crossing of bearer establishment messages
              with prenegotiation-related APDUs
   9.3 Procedures at a transit CC entity
10 Interactions
11 Interworking with networks not supporting PRN
   11.1 Calls from other networks to a network supporting
        PRN
   11.2 Calls to other networks not supporting PRN
        SDL Diagrams
Annex A - Information flow diagrams
Annex B - Object identifiers defined in this Standard
Annex C - Bibliography