ETS 300 426 : 20001

Foreword
1 Scope
2 Conformance
3 References
4 Definitions
   4.1 External definitions
   4.2 Busy
   4.3 Conference type connection
   4.4 Established call
   4.5 Forced release
   4.6 Impending intrusion warning notification
   4.7 Inter-PTNX link
   4.8 Intruding call
   4.9 Isolation
   4.10 Path retention
   4.11 Served user
   4.12 Wanted user
   4.13 Unwanted user
   4.14 Unwanted user PTNX
   4.15 Wait on busy
5 List of acronyms
6 Signalling protocol for the support of SS-CI
   6.1 SS-CI description
   6.2 SS-CI operational requirements
        6.2.1 Requirements on the Origination PTNX
        6.2.2 Requirements on the Terminating PTNX
        6.2.3 Requirements on a Transit PTNX
        6.2.4 Requirements on the unwanted user PTNX
   6.3 SS-CI coding requirements
        6.3.1 Operations
        6.3.2 Notifications
        6.3.3 Information elements
               6.3.3.1 Facility Information elements
               6.3.3.2 Notification indicator
                        information element
               6.3.3.3 Other information elements
        6.3.4 Messages
   6.4 SS-CI state definitions
        6.4.1 States at the Originating PTNX
               6.4.1.1 State CI-Idle
               6.4.1.2 State CI-Wait-Ack
               6.4.1.3 State CI-Orig-Invoked
               6.4.1.4 State CI-inForcedRelease-Request
               6.4.1.5 State CI-Isolation-Request
               6.4.1.6 State CI-in WOB-Request
               6.4.1.7 State CI-Orig-Isolated
               6.4.1.8 State CI-isForcedRelease-Request
               6.4.1.9 State CI-isWOB-Request
               6.4.1.10 State CI-Orig-WOB
        6.4.2 States at the Terminating PTNX
   6.5 SS-CI signalling procedures for activation, de-
        activation and registration
   6.6 SS-CI signalling procedures for invocation and
        operation
        6.6.1 Actions at the Originating PTNX
        6.6.2 Actions at the Terminating PTNX
        6.6.3 Actions at the unwanted user PTNX
        6.6.4 Actions at a Transit PTNX
   6.7 SS-CI impact of interworking with public ISDNs
   6.8 SS-CI impact of interworking with non-ISDNs
   6.9 SS-CI parameter values (timers)
        6.9.1 Timer T1
        6.9.2 Timer T2
        6.9.3 Timer T3
        6.9.4 Timer T4
        6.9.5 Timer T5
        6.9.6 timer T6
Annex A (Normative): Signalling protocol for the support
         of path retention
A.1 Path retention description
A.2 Path retention operational requirements
      A.2.1 Requirements on the Origination PTNX
      A.2.2 Requirements on the Terminating PTNX
      A.2.3 Requirements on a Transit PTNX
A.3 Path retention coding requirements
      A.3.1 Operations
      A.3.2 Information elements
      A.3.3 Messages
A.4 Path retention state definitions
      A.4.1 States at the Origination PTNX
      A.4.2 States at the Terminating PTNX
A.5 Path retention signalling procedures for
      invocation and operation
      A.5.1 Actions at the Originating PTNX
      A.5.2 Actions at the Terminating PTNX
      A.5.3 Actions at a Transit PTNX
A.6 Path retention impact of interworking with public
      ISDNs
A.7 Path retention impact of interworking with
      non-ISDNs
A.8 Path retention parameter values (timers)
A.9 Specification and Description Language (SDL)
      A.9.1 SDL representation of path retention at the
             Originating PTNX
      A.9.2 SDL representation of path retention at the
             Terminating PTNX
Annex B (Normative): Protocol Implementation Conformance
         Statement (PICS) proforma
B.1 Introduction
B.2 Instructions for completing the PICS proforma
      B.2.1 General structure of the PICS proforma
      B.2.2 Additional information
      B.2.3 Exception information
B.3 PICS proforma for ECMA-203
      B.3.1 Implementation identification
      B.3.2 Protocol summary
      B.3.3 General
      B.3.4 Procedures
      B.3.5 Coding
      B.3.6 Timers
Annex C (Informative): Examples of message sequences
C.1 Example message sequence for normal
      operation of SS-CI without path retention
C.2 Example message sequence for normal
      operation of SS-CI with path retention
C.3 Example of unsuccessful invocation of SS-CI
      without path retention
C.4 Examples of completion of SS-CI
      C.4.1 The established call is released
      C.4.2 The intruding call is released
C.5 Examples of invocation of SS-CI options
      C.5.1 The Originating PTNX forced releases the
             unwanted user
      C.5.2 The Originating PTNX isolates the unwanted
             user
      C.5.3 The Originating PTNX invokes wait on busy
      C.5.4 The Originating PTNX reinvokes intrusion
             during wait on busy
Annex D (Informative): Specification and Description
         Language (SDL) representation of procedures
D.1 SDL representation of SS-CI at the Originating
      PTNX
D.2 SDL representation of SS-CI at the Terminating
      PTNX
History

Intrusion supplementary service (SS-CI) at the Q reference point between Private Telecommunication Network Exchanges (PTNXs) connected together within a Private Telecommunication Network (PTN)