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

This International Standard specifies the Additional Network Feature (ANF) Call Identification and Call Linkage (CIDL), 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.

Technologies de l'information — Télécommunications et échange d'information entre systèmes — Réseau privé à intégration de services — Spécifications, modèle fonctionnel et flux d'informations — Identification d'appel et caractéristique de réseau additionnelle de liaison d'appel

General Information

Status
Published
Publication Date
12-Sep-2001
Current Stage
9093 - International Standard confirmed
Completion Date
20-Sep-2006
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ISO/IEC 21888:2001 - 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
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INTERNATIONAL ISO/IEC
STANDARD 21888
First edition
2001-09-01


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
Technologies de l’information — Télécommunications et échange
d’information entre systèmes — Réseau privé à intégration de services —
Spécifications, modèle fonctionnel et flux d’informations — Identification
d’appel et caractéristique de réseau additionnelle de liaison d’appel




Reference number
ISO/IEC 21888:2001(E)
©
ISO/IEC 2001

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ISO/IEC 21888:2001(E)
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©  ISO/IEC 2001
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic
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© ISO/IEC 2001 – All rights reserved
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ISO/IEC 21888:2001(E)
Contents Page
Foreword v
Introduction vi
1 Scope 1
2 Conformance 1
3 Normative references 1
4 Definitions 2
4.1 External definitions 2
4.2 Additional Network Feature (ANF) 3
4.3 ANF-CIDL user 3
4.4 Call 3
4.5 Call Identification Data, CIDL-Data 3
4.6 Call Linkage Data 3
4.7 Global Call Identification, Global Call ID, GID 3
4.8 Leg Identification, Leg ID, LID 3
4.9 Thread Identification, Thread ID, TID 3
5 List of acronyms 3
6 ANF-CIDL stage 1 specification 4
6.1 Description 4
6.1.1 General description 4
6.1.2 Qualifications on applicability to telecommunication services 4
6.2 Procedure 4
6.2.1 Provision/withdrawal 4
6.2.2 Normal procedures 4
6.2.3 Exceptional procedures 4
6.3 Interaction with other supplementary services and ANFs 4
6.3.1 Calling Line Identification Presentation (SS-CLIP) 5
6.3.2 Connected Line Identification Presentation (SS-COLP) 5
6.3.3 Calling/Connected Line Identification Restriction (SS-CLIR) 5
6.3.4 Calling Name Identification Presentation (SS-CNIP) 5
6.3.5 Calling Name Identification Restriction (SS-CNIR) 5
6.3.6 Connected Name Identification Presentation (SS-CONP) 5
6.3.7 Completion of Call to Busy Subscriber (SS-CCBS) 5
6.3.8 Completion of Call on No Reply (SS-CCNR) 5
6.3.9 Call Transfer (SS-CT) 5
6.3.10 Call Forwarding Unconditional (SS-CFU) 5
6.3.11 Call Forwarding Busy (SS-CFB) 5
6.3.12 Call Forwarding No Reply (SS-CFNR) 5
6.3.13 Call Deflection (SS-CD) 5
6.3.14 Path Replacement (ANF-PR) 5
6.3.15 Call Offer (SS-CO) 6
6.3.16 Call Intrusion (SS-CI) 6
6.3.17 Do not Disturb (SS-DND) 6
6.3.18 Do not Disturb Override (SS-DNDO) 6
6.3.19 Advice of Charge (SS-AOC) 6
6.3.20 Recall (SS-RE) 6
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ISO/IEC 21888:2001(E)
6.3.21 Call Interception (ANF-CINT) 6
6.3.22 Transit Counter (ANF-TC) 6
6.3.23 Route Restriction Class (ANF-RRC) 6
6.3.24 Message Waiting Indication (SS-MWI) 6
6.3.25 Wireless Terminal Location Registration (SS-WTLR) 6
6.3.26 Wireless Terminal Incoming Call (ANF-WTMI) 6
6.3.27 Wireless Terminal Outgoing Call (ANF-WTMO) 7
6.3.28 Wireless Terminal Authentication of a WTM User (SS-WTAT) 7
6.3.29 Wireless Terminal Authentication of the PISN (SS-WTAN) 7
6.3.30 Private User Mobility Incoming Call (ANF-PUMI) 7
6.3.31 Private User Mobility Outgoing Call (ANF-PUMO) 7
6.3.32 Private User Mobility Registration (SS-PUMR) 7
6.3.33 Common Information (ANF-CMN) 7
6.3.34 Call Priority Interruption (Protection) (SS-CPI(P)) 7
6.3.35 Single Step Call Transfer (SSCT) 7
6.3.36 Other interactions 7
6.4 Interworking considerations 7
6.5 Overall SDL 7
7 ANF-CIDL stage 2 specification 8
7.1 Functional model 8
7.1.1 Functional model description 8
7.1.2 Description of functional entities 9
7.1.3 Example relationship of functional model to Basic Call functional model 9
7.2 Information flows 9
7.2.1 Definition of information flows 9
7.2.2 Examples of information flow sequences 10
7.3 Functional Entity actions 12
7.3.1 Functional Entity actions of FE1 12
7.3.2 Functional Entity actions of FE2 12
7.3.3 Functional Entity actions of FE3 12
7.4 Functional Entity behaviour 12
7.4.1 Behaviour of FE1 13
7.4.2 Behaviour of FE2 14
7.4.3 Behaviour of FE3 15
7.5 Allocation of Functional Entities to physical equipment 16
7.6 Interworking considerations 16

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ISO/IEC 21888:2001(E)
Foreword
ISO (the International Organization for Standardization) and IEC (the International Electrotechnical Commission) form the
specialized system for worldwide standardization. National bodies that are members of ISO or IEC participate in the
development of International Standards through technical committees established by the respective organization to deal with
particular fields of technical activity. ISO and IEC technical committees collaborate in fields of mutual interest. Other
international organizations, governmental and non-governmental, in liaison with ISO and IEC, also take part in the work.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 3.
In the field of information technology, ISO and IEC have established a joint technical committee, ISO/IEC JTC 1. Draft
International Standards adopted by the joint technical committee are circulated to national bodies for voting. Publication as an
International Standard requires approval by at least 75 % of the national bodies casting a vote.
Attention is drawn to the possibility that some of the elements of this International Standard may be the subject of patent rights.
ISO and IEC shall not be held responsible for identifying any or all such patent rights.
International Standard ISO/IEC 21888 was prepared by ECMA (as ECMA-313) and was adopted, under a special “fast-track
procedure”, by Joint Technical Committee ISO/IEC JTC 1, Information technology, in parallel with its approval by national
bodies of ISO and IEC.
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ISO/IEC 21888:2001(E)
Introduction
This International Standard is one of a series of Standards defining services and signalling procedures applicable to Private
Integrated Services Networks (PISNs). The series uses the ISDN concepts as developed by ITU-T and conforms to the
framework of International Standards for Open Systems Interconnection as defined by ISO/IEC.
This International Standard specifies the Call Identification and Call Linkage (CIDL) additional network feature.
This International Standard is based upon the practical experience of ECMA member companies and the results of their active
and continuous participation in the work of ISO/IEC JTC1, ITU-T, ETSI and other international and national standardization
bodies. It represents a pragmatic and widely based consensus.
There is currently no equivalent service specified by ITU-T or ETSI for public ISDN.


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INTERNATIONAL STANDARD ISO/IEC 21888:2001(E)

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
1 Scope
This International Standard specifies the Additional Network Feature (ANF) Call Identification and Call Linkage (CIDL),
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.
2 Conformance
In order to conform to this International Standard, a stage 3 standard shall specify signalling protocols and equipment
behaviour that are capable of being used in a PISN which supports the supplementary service specified in this International
Standard. This means that, to claim conformance, a stage 3 standard is required to be adequate for the support of those aspects
of clause 6 (stage 1) and clause 7 (stage 2) which are relevant to the interface or equipment to which the stage 3 standard
applies.
3 Normative references
The following normative documents contain provisions which, through reference in this text, constitute provisions of this
International Standard. For dated references, subsequent amendments to, or revisions of, any of these publications do not
apply. However, parties to agreements based on this International Standard are encouraged to investigate the possibility of
applying the most recent editions of the normative documents indicated below. For undated references, the latest edition of the
normative document referred to applies. Members of ISO and IEC maintain registers of currently valid International Standards.
ISO/IEC 11571:1998, Information technology — Telecommunications and information exchange between systems — Private
Integrated Services Networks — Addressing
ISO/IEC 11574:2000, Information technology — Telecommunications and information exchange between systems — Private
Integrated Services Network — Circuit-mode 64 kbit/s bearer services — Service description, functional capabilities and
information flows
ISO/IEC 11579-1:1994, Information technology — Telecommunications and information exchange between systems — Private
Integrated Services Network — Part 1: Reference configuration for PISN exchanges (PINX)
ISO/IEC 13863:1998, Information technology — Telecommunications and information exchange between systems — Private
Integrated Services Network — Specification, functional model and information flows — Path replacement additional network
feature
ISO/IEC 13865:1995, Information technology — Telecommunications and information exchange between systems — Private
Integrated Services Network — Specification, functional model and information flows — Call transfer supplementary service
ISO/IEC 13866:1995, Information technology — Telecommunications and information exchange between systems — Private
Integrated Services Network — Specification, functional model and information flows — Call completion supplementary
services
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ISO/IEC 21888:2001(E)
ISO/IEC 13872:1995, Information technology — Telecommunications and information exchange between systems — Private
Integrated Services Network — Specification, functional model and information flows — Call diversion supplementary services
ISO/IEC 14841:1996, Information technology — Telecommunications and information exchange between systems — Private
Integrated Services Network — Specification, functional model and information flows — Call offer supplementary service
ISO/IEC 14842:1996, Information technology — Telecommunications and information exchange between systems — Private
Integrated Services Network — Specification, functional model and information flows — Do not disturb and do not disturb
override supplementary services
ISO/IEC 14845:1996, Information technology — Telecommunications and information exchange between systems — Private
Integrated Services Network — Specification, functional model and information flows — Call intrusion supplementary service
ISO/IEC 15053:1997, Information technology — Telecommunications and information exchange between systems — Private
Integrated Services Network — Specification, functional model and information flows — Call interception additional network
feature
ISO/IEC 15428:1999, Information technology — Telecommunications and information exchange between systems — Private
Integrated Services Network — Specification, functional model and information flows — Wireless terminal location
registration supplementary service and wireless terminal information exchange additional network feature
ISO/IEC 15430:1999, Information technology — Telecommunications and information exchange between systems — Private
Integrated Services Network — Specification, functional model and information flows — Wireless terminal call handling
additional network features
ISO/IEC 15432:1999, Information technology — Telecommunications and information exchange between systems — Private
Integrated Services Network — Specification, functional model and information flows — Wireless terminal authentication
supplementary services
ISO/IEC 17875:2000, Information technology — Telecommunications and information exchange between systems — Private
Integrated Services Network — Specification, functional model and information flows — Private User Mobility (PUM) —
Registration supplementary service
ISO/IEC 17877:2000, Information technology — Telecommunications and information exchange between systems — Private
Integrated Services Network — Specification, functional model and information flows — Private User Mobility (PUM) — Call
handling additional network features
ISO/IEC 18051:2000, Information technology — Telecommunications and information exchange between systems — Services
for Computer Supported Telecommunications Applications (CSTA) Phase III
ISO/IEC 19459:2001, Information technology — Telecommunications and information exchange between systems — Private
Integrated Services Network — Specification, functional model and information flows — Single step call transfer
supplementary service
ETS 300 387:1994, Private Telecommunication Network (PTN); Method for the specification of basic and supplementary
services
ITU-T Rec. I.112:1993, Vocabulary of terms for ISDNs
ITU-T Rec. I.210:1993, Principles of telecommunication services supported by an ISDN and the means to describe them
ITU-T Rec. Z.100:1999, Specification and description language (SDL)
4 Terms and definitions
For the purposes of this International Standard the following terms and definitions apply.
4.1 External definitions
This International Standard uses the following terms defined in other documents:
— Basic service (ITU-T Rec. I.210)
— PISN Number (ISO/IEC 11571)
— Private Integrated Services Network (PISN) (ISO/IEC 11579-1)
— Private Integrated Services Network Exchange (PINX) (ISO/IEC 11579-1)
— Service (ITU-T Rec. I.112)
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ISO/IEC 21888:2001(E)
— Signalling (ITU-T Rec. I.112)
— Supplementary Service (ITU-T Rec. I.210)
— User (ISO/IEC 11574)
This International Standard refers to the following basic call Functional Entities (FE) defined in ISO/IEC 11574:
— Call Control (CC)
— Call Control Agent (CCA)
This International Standard refers to the following basic call inter-FE relationships defined in ISO/IEC 11574:
— r1
— r2
— r3
This International Standard refers to the following basic call information flows defined in ISO/IEC 11574:
— SETUP request/indication
4.2 Additional Network Feature (ANF) : A capability over and above that of the basic service provided by a PISN, but not
directly to a user.
4.3 ANF-CIDL user : An entity, within a PISN, that requests ANF-CIDL.
4.4 Call : The term call is used within this International Standard for a Basic Call as defined in ISO/IEC 11574 or a Call
Independent Signalling Connection.
4.5 Call Identification Data, CIDL-Data : The Leg ID and Call Linkage Data assigned to a specific call.
4.6 Call Linkage Data : The Global Call ID and Thread ID assigned to a specific call, as specified in ISO/IEC 18051.
4.7 Global Call Identification, Global Call ID, GID : A value assigned to a call end-to-end to uniquely identify that call
throughout the PISN, without regards to its route or its history. If different calls are being transformed into a new call (i.e. due
to Supplementary Service / ANF interaction), the GIDs of the old calls are updated (i.e. replaced / overwritten) with a new GID
value for the new call.
4.8 Leg Identification, Leg ID, LID : A value assigned to a new call to uniquely identify that call throughout the PISN. The
Leg ID does not change (i.e. is never overwritten) during the lifetime of the call, even if the call is transformed due to
Supplementary Service / ANF interactions. After the transformation of two or more calls with different Leg IDs into one
resulting call (e.g. after call transfer), the different parts (legs) of the resulting call retain their originally assigned Leg IDs.
4.9 Thread Identification, Thread ID, TID : A value assigned to calls which are logically linked together for the purpose of
correlating them throughout the PISN. If two ore more calls are logically linked together (i.e. due to Supplementary Service /
ANF interaction), the Thread IDs of all these calls are updated (i.e. replaced / overwritten) with the current Thread ID of one of
these calls.
5 List of acronyms
ANF Additional Network Feature
ANF-CIDL ANF – Call Identification and Call Linkage
CC Call Control (Functional Entity)
CCA Call Control Agent (Functional Entity)
FE Functional Entity
GID Global Call Identification
CIDL Call Identification and Call Linkage
ID Identification
ISDN Integrated Services Digital Network
LID Leg Identification
PINX Private Integrated Services Network Exchange
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ISO/IEC 21888:2001(E)
PISN Private Integrated Services Network
SDL Specification and Description Language
SS Supplementary Service
TID Thread Identification
6 ANF-CIDL stage 1 specification
6.1 Description
6.1.1 General description
ANF-CIDL is an additional network feature which allows the assignment of a Global Call Identification to identify a call end-
to-end. As an option, a Thread Identification 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 may be assigned, to identify the
different call legs of a global call.
6.1.2 Qualifications on applicability to telecommunication services
ANF-CIDL is applicable to all basic services defined in ISO/IEC 11574.
6.2 Procedure
6.2.1 Provision/withdrawal
ANF-CIDL shall be generally available throughout the PISN.
6.2.2 Normal procedures
6.2.2.1 Activation, deactivation and interrogation
The feature shall be permanently activated.
6.2.2.2 Invocation and operation
A Global Call ID shall be assigned to each new call that is set up. Due to transformation of a call, the Global Call ID may be
updated. At one time there can only be one Global Call ID assigned to a specific call. Once a Global Call ID is assigned, it
shall not be re-used, even not after the call, to which it is assigned, has been cleared.
Optionally, a Thread ID may be assigned to each new call that is set up. It may be updated during the lifetime of a call. At one
time there can only be one Thread ID assigned to a specific call. Once a Thread ID is assigned, it shall not be re-used, even not
after the call, to which it is assigned, has been cleared.
NOTE 2 - This is guaranteed by adding a time element to the Global Call ID and the Thread ID.
Optionally, a Leg ID may be assigned to each new call that is set up. Due to supplementary service / ANF interactions,
different Leg IDs may be assigned to the different parts of a transformed call. At one time there can only be one Leg ID
assigned to a specific part of a call. After the call has been cleared, the Leg ID shall be available for re-use.
6.2.3 Exceptional procedures
6.2.3.1 Activation, d
...

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