BS ISO/IEC 15056:1997

Foreword
Introduction
1 Scope
2 Conformance
3 Normative references
4 Definitions
    4.1 External definitions
5 List of acronyms
6 Signalling protocol for the support of ANF-TC
    6.1 ANF-TC description
    6.2 ANF-TC operational requirements
          6.2.1 Requirements on the Originating PINX
          6.2.2 Requirements on the Terminating PINX
          6.2.3 Requirements on a Transit PINX
    6.3 ANF-TC coding requirements
          6.3.1 Transit coding information element
          6.3.2 Messages
    6.4 ANF-TC signalling procedures
          6.4.1 Actions at the Originating PINX
          6.4.2 Actions at the Terminating PINX
          6.4.3 Actions at a Transit PINX
          6.4.4 Actions at an Incoming Gateway PINX
          6.4.5 Actions at an Outgoing Gateway PINX
    6.5 Protocol interactions between ANF-TC and other
          supplementary services and ANFs
          6.5.1 Interaction with Calling Name Identification
                  Presentation (SS-CNIP)
          6.5.2 Interaction with Connected Name
                  Identification Presentation (SS-CONP)
          6.5.3 Interaction with Completion of Calls to
                  Busy Subscribers (SS-CCBS)
          6.5.4 Interaction with Completion of Calls on
                  No Reply (SS-CCNR)
          6.5.5 Interaction with Call Transfer (SS-CT)
          6.5.6 Interaction with Call Forwarding
                  Unconditional (SS-CFU)
          6.5.7 Interaction with Call Forwarding
                  Busy (SS-CFB)
          6.5.8 Interaction with Call Forwarding No Reply
                  (SS-CFNR)
          6.5.9 Interaction with Call Deflection (SS-CD)
          6.5.10 Interaction with Path Replacement (ANF-PR)
          6.5.11 Interaction with Call Offer (SS-CO)
          6.5.12 Interaction with Do Not Disturb (SS-DND)
          6.5.13 Interaction with Do Not Disturb
                  Override (SS-DNDO)
          6.5.14 Interaction with Call Intrusion (SS-CI)
          6.5.15 Interaction with Call Interception
                  (ANF-CINT)
          6.5.16 Interaction with Recall (SS-RE)
          6.5.17 Interaction with Advice of Charge (SS-AOC)
Annex A Protocol Implementation Conformance Statement
          (PICS) proforma

Defines signalling protocol for supporting the Transit Counter additional network features (ANF-TC) at the Q-reference point between Private Integrated Services Network Exchanges (PINXs) connected within a Private Integrated Services Network (PISN). Limits the number of Transit PINXs in order that a setup request may be routed through eg., for protection of the network against indefinite looping.