This standard was last reviewed and confirmed in 2006. Therefore this version remains current.
This International Standard specifies the signalling protocol for the support of the Call Identification and Call Linkage
Additional Network Feature (ANF-CIDL) at the Q reference point between Private Integrated Network Services Exchanges
(PINXs) connected together within a Private Integrated Services Network (PISN).
ANF-CIDL is an additional network feature which allows the assignment of a Global Call Identification (GID) to identify a
call end-to-end over the call route (i.e. between the two end PINXs). As an option, a Thread Identification (TID) may be
assigned to different calls which are logically linked together due to the operation of other supplementary services and/or
ANFs. Additionally a Leg Identification (LID) may be assigned, to identify the different legs of a call.
NOTE 1 - This ANF has been developed to support the use of CSTA (ISO/IEC 18051) in a networked environment, i.e. in a PISN. Use of
this ANF for other applications is not precluded.
The Q reference point is defined in ISO/IEC 11579-1.
Supplementary Service specifications are produced in three stages and according to the method specified in ETS 300 387. This
International Standard contains the stage 3 specification for the Q reference point and satisfies the requirements identified by
the stage 1 and stage 2 specifications in ISO/IEC 21888.
The signalling protocol for ANF-CIDL operates on top of the signalling protocol for basic circuit switched call control, as
specified in ISO/IEC 11572, and uses certain aspects of the generic procedures for the control of supplementary services
specified in ISO/IEC 11582.
This International Standard also specifies additional signalling protocol requirements for the support of interactions at the Q
reference point between Call Identification and Call Linkage and other supplementary services and ANFs.
This International Standard is applicable to PINXs which can be interconnected to form a PISN.
Status : PublishedPublication date : 2001-09
Edition : 1Number of pages : 39
Technical Committee:Telecommunications and information exchange between systems
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