1 Scope
2 Conformance
3 References (normative)
4 Definitions
  4.1 External definitions
  4.2 Additional network feature
  4.3 Call, Basic call
  4.4 Call Priority Interruption Capability Level (CPICL)
  4.5 Call Priority Interruption Protection Level (CPIPL)
  4.6 Established call
  4.7 Impending priority interruption state
  4.8 Impending priority interruption warning notification
  4.9 Non-priority call
  4.10 Priority call
  4.11 Protected call
  4.12 Served user
  4.13 Time to priority interruption
  4.14 Unprotected call
5 List of acronyms
6 SS-CPI stage 1 specification
  6.1 Description
       6.1.1 General description
       6.1.2 Qualifications on applicability to
              telecommunication services
  6.2 Procedure
       6.2.1 Provision/withdrawal
       6.2.2 Normal procedures
       6.2.3 Exceptional procedures
  6.3 Interaction with other supplementary services and
       ANFs
       6.3.1 Calling Name Identification Presentation
              (SS-CNIP)
       6.3.2 Connected Name Identification Presentation
              (SS-CONP)
       6.3.3 Completion of Call to Busy Subscriber
              (SS-CCBS)
       6.3.4 Completion of Call on No Reply (SS-CCNR)
       6.3.5 Call Transfer (SS-CT)
       6.3.6 Call Forwarding Unconditional (SS-CFU)
       6.3.7 Call Forwarding Busy (SS-CFB)
       6.3.8 Call Forwarding No Reply (SS-CFNR)
       6.3.9 Call Deflection (SS-CD)
       6.3.10 Path Replacement (ANF-PR)
       6.3.11 Call Offer (SS-CO)
       6.3.12 Call Intrusion (SS-CI)
       6.3.13 Do not Disturb (SS-DND)
       6.3.14 Do not Disturb Override (SS-DNDO)
       6.3.15 Advice of Charge (SS-AOC)
       6.3.16 Recall (SS-RE)
       6.3.17 Call Interception (ANF-CINT)
       6.3.18 Transit Counter (ANF-TC)
       6.3.19 Interaction with Wireless Terminal Location
              Registration (SS-WTLR)
       6.3.20 Interaction with Wireless Terminal Incoming
              Call (ANF-WTMI)
       6.3.21 Interaction with Wireless Terminal Outgoing
              Call (ANF-WTMO)
       6.3.22 Interaction with Wireless Terminal
              Authentication of a WTM user (SS-WTAT)
       6.3.23 Interaction with Wireless Terminal
              Authentication of a PISN (SS-WTAN)
       6.3.24 Message Waiting Indication (SS-MWI)
       6.3.25 Common Information (ANF-CMN)
       6.3.26 Call Priority Interruption Protection
              (SS-CPIP)
  6.4 Interworking considerations
  6.5 Overall SDL
7 SS-CPIP stage 1 specification
  7.1 Description
       7.1.1 General description
       7.1.2 Qualifications on applicability to
              telecommunication services
  7.2 Procedure
       7.2.1 Provision/withdrawal
       7.2.2 Normal procedures
       7.2.3 Exceptional procedures
  7.3 Interaction with other supplementary services and
       ANFs
       7.3.1 Calling Name Identification Presentation
              (SS-CNIP)
       7.3.2 Connected Name Identification Presentation
              (SS-CONP)
       7.3.3 Completion of Call to Busy Subscriber
              (SS-CCBS)
       7.3.4 Completion of Call on No Reply (SS-CCNR)
       7.3.5 Call Transfer (SS-CT)
       7.3.6 Call Forwarding Unconditional (SS-CFU)
       7.3.7 Call Forwarding Busy (SS-CFB)
       7.3.8 Call Forwarding No Reply (SS-CFNR)
       7.3.9 Call Deflection (SS-CD)
       7.3.10 Path Replacement (ANF-PR)
       7.3.11 Call Offer (SS-CO)
       7.3.12 Call Intrusion (SS-CI )
       7.3.13 Do not Disturb (SS-DND)
       7.3.14 Do not Disturb Override (SS-DNDO)
       7.3.15 Advice of Charge (SS-AOC)
       7.3.16 Recall (SS-RE)
       7.3.17 Call Interception (ANF-CINT)
       7.3.18 Transit Counter (ANF-TC)
       7.3.19 Interaction with Wireless Terminal Location
              Registration (SS-WTLR)
       7.3.20 Interaction with Wireless Terminal Incoming
              Call (ANF-WTMI)
       7.3.21 Interaction with Wireless Terminal Outgoing
              Call (ANF-WTMO)
       7.3.22 Interaction with Wireless Terminal
              Authentication of a WTM user (SS-WTAT)
       7.3.23 Interaction with Wireless Terminal
              Authentication of a PISN (SS-WTAN)
       7.3.24 Message Waiting Indication (SS-MWI)
       7.3.25 Common Information (ANF-CMN)
       7.3.26 Call Priority Interruption (SS-CPI)
  7.4 Interworking considerations
  7.5 Overall SDL
8 SS-CPI stage 2 specification
  8.1 Functional model
       8.1.1 Functional model description
       8.1.2 Description of Functional Entities
       8.1.3 Relationship of functional model to basic
              call functional model
  8.2 Information flows
       8.2.1 Definition of information flows
       8.2.2 Relationship of information flows to basic
              call information flows
       8.2.3 Information flow sequences
  8.3 Functional Entity actions
       8.3.1 Actions of FE1
       8.3.2 Actions of FE2
       8.3.3 Actions of FE3
       8.3.4 Actions of FE4
       8.3.5 Actions of FE5
  8.4 Functional entity behaviour
       8.4.1 Behaviour of FE1
       8.4.2 Behaviour of FE2
       8.4.3 Behaviour of FE3
       8.4.4 Behaviour of FE4
       8.4.5 Behaviour of FE5
  8.5 Allocation of Functional Entities to physical
       equipment
  8.6 Interworking considerations
9 SS-CPIP stage 2 specification
  9.1 Functional model
       9.1.1 Functional model description
       9.1.2 Description of Functional Entities
       9.1.3 Relationship of functional model to basic
              call functional model
  9.2 Information flows
       9.2.1 Definition of information flows
       9.2.2 Relationship of information flows to basic
              call information flows
       9.2.3 Information flow sequences
  9.3 Functional Entity actions
       9.3.1 Actions of FE1
       9.3.2 Actions of FE2
       9.3.3 Actions of FE3
       9.3.4 Actions of FE4
       9.3.5 Actions of FE5
  9.4 Functional entity behaviour
       9.4.1 Behaviour of FE1
       9.4.2 Behaviour of FE2
       9.4.3 Behaviour of FE3
       9.4.4 Behaviour of FE4
       9.4.5 Behaviour of FE5
  9.5 Allocation of Functional Entities to physical
       equipment
  9.6 Interworking considerations