ECMA 203 : 4ED 2001

1 Scope
2 Conformance
3 References (normative)
4 Definitions
  4.1 External definitions
  4.2 Other definitions
       4.2.1 Busy
       4.2.2 Conference type connection
       4.2.3 Impending intrusion warning notification
       4.2.4 Isolation
       4.2.5 Path retention
       4.2.6 Served User PINX
       4.2.7 Wanted user
       4.2.8 Unwanted user
       4.2.9 Unwanted User PINX
       4.2.10 Wait on busy
5 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 an Originating PINX
       6.2.2 Requirements on a Terminating PINX
       6.2.3 Requirements on a Transit PINX
       6.2.4 Requirements on an Unwanted User PINX
  6.3 SS-CI coding requirements
       6.3.1 Operations
       6.3.2 Notifications
       6.3.3 Information elements
       6.3.4 Messages
  6.4 SS-CI state definitions
       6.4.1 States at the Originating PINX
       6.4.2 States at the Terminating PINX
  6.5 SS-CI signalling procedures for activation, deactivation
       and registration
  6.6 SS-CI signalling procedures for invocation and operation
       6.6.1 Actions at the Originating PINX
       6.6.2 Actions at the Terminating PINX
       6.6.3 Actions at the Unwanted User PINX
       6.6.4 Actions at a Transit PINX
  6.7 SS-CI impact of interworking with public ISDNs
  6.8 SS-CI impact of interworking with non-ISDNs
  6.9 Protocol interactions between SS-CI and other
       supplementary services and ANFs
       6.9.1 Interaction with Calling Name Identification
              Presentation (SS-CNIP)
       6.9.2 Interaction with Connected Name Identification
              Presentation (SS-CONP)
       6.9.3 Interaction with Call Completion to Busy Subscriber
              (SS-CCBS)
       6.9.4 Interaction with Call Completion on No Reply
              (SS-CCNR)
       6.9.5 Interaction with Call Transfer (SS-CT)
       6.9.6 Interaction with Call Forwarding Unconditional
              (SS-CFU)
       6.9.7 Interaction with Call Forwarding Busy (SS-CFB)
       6.9.8 Interaction with Call Forwarding No Reply
              (SS-CFNR)
       6.9.9 Interaction with Call Deflection (SS-CD)
       6.9.10 Interaction with Path Replacement (ANF-PR)
       6.9.11 Interaction with Call Offer (SS-CO)
       6.9.12 Interaction with Do Not Disturb (SS-DND)
       6.9.13 Interaction with Do Not Disturb Override (SS-DNDO)
  6.10 SS-CI parameter values (timers)
       6.10.1 Timer T1
       6.10.2 Timer T2
       6.10.3 Timer T3
       6.10.4 Timer T4
       6.10.5 Timer T5
       6.10.6 Timer T6
Annex A - Signalling protocol for the support of Path Retention
Annex B - Protocol Implementation Conformance Statement (PICS)
          proforma
Annex C - Examples of message sequences
Annex D - Specification and Description Language (SDL)
          representation of procedures
Annex E - Imported ASN.1 definitions
Annex F - ASN.1 definitions according to ITU-T Recs. X.208/X.209

Defines the signalling protocol for supporting the Call Intrusion supplementary service (SS-CI) at the Q reference point between Private Integrated Services Network Exchanges (PINXs) connected within a Private Integrated Services Network (PISN). This is a supplementary service, enabling the calling user (following a request by the calling user) to communicate with a busy called user by breaking into an established call between the called user and a third user (unwanted user).