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Information technology — Telecommunications and information exchange between systems — Private Integrated Services Network — Specification, functional model and information flows — Call Identification and Call Linkage Additional Network Feature
which is applicable to various basic services supported by Private Integrated Services Networks (PISN). Basic services are
specified in ISO/IEC 11574.
ANF-CIDL is an additional network feature which allows the identification and correlation of calls throughout a PISN by
assigning unambiguous identifiers to each new call and also, as an option, to transformed and logically linked calls.
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.
Supplementary service specifications are produced in three stages, according to the method described in ETS 300 387. This
International Standard contains the stage 1 and stage 2 specifications of ANF-CIDL. The stage 1 specification (clause 6)
specifies the general feature principles and capabilities. The stage 2 specification (clause 7) identifies the Functional Entities
involved in the supplementary service and the information flows between them.
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