ISO/IEC 20113:2004

INTERNATIONAL ISO/IEC
STANDARD 20113
First edition
2004-05-15
Information technology —
Telecommunications and information
exchange between systems — Private
Integrated Services Network —
Specification, functional model and
information flows — Make call request
supplementary service
Technologies de l'information — Télécommunications et échange
d'information entre systèmes — Réseau privé à intégration de
services — Spécification, modèle fonctionnel et flux d'informations —
Service supplémentaire de demande par appel

Reference number
©
ISO/IEC 2004
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©  ISO/IEC 2004
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ii © ISO/IEC 2004 – All rights reserved

Contents Page
Foreword. iv
Introduction . v
1 Scope. 1
2 Conformance . 1
3 Normative references . 1
4 Terms and definitions. 2
4.1 External definitions. 2
4.2 Other definitions . 2
5 Acronyms. 3
6 SS-MCR stage 1 specification . 3
6.1 Description. 3
6.2 Procedures . 3
6.3 Interactions with other Supplementary Services / Additional Network Features . 5
6.4 Interworking considerations. 8
6.5 Overall SDL. 8
7 SS-MCR stage 2 specification . 10
7.1 Functional model . 10
7.2 Information flows . 12
7.3 Functional Entity actions . 14
7.4 Functional Entity behaviour. 15
7.5 Allocation of Functional Entities to physical equipment. 20
7.6 Interworking considerations. 20

© ISO/IEC 2004 – All rights reserved iii

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. In the field of information
technology, ISO and IEC have established a joint technical committee, ISO/IEC JTC 1.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.
The main task of the joint technical committee is to prepare International Standards. 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 document may be the subject of patent
rights. ISO and IEC shall not be held responsible for identifying any or all such patent rights.
ISO/IEC 20113 was prepared by ECMA (as ECMA-343) 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.

iv © ISO/IEC 2004 – All rights reserved

Introduction
This International Standard is one of a series defining services and signalling protocols applicable to Private
Integrated Services Networks (PISNs). The series uses 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 Make Call Request supplementary service.
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.

© ISO/IEC 2004 – All rights reserved v

INTERNATIONAL STANDARD ISO/IEC 20113:2004(E)

Information technology — Telecommunications and information
exchange between systems — Private Integrated Services
Network — Specification, functional model and information
flows — Make call request supplementary service
1 Scope
This International Standard specifies supplementary service Make Call Request (SS-MCR), which is related,
but not limited, to various basic services supported by Private Integrated Services Networks (PISNs). Basic
services are specified in ISO/IEC 11574.
The supplementary service MCR enables a Requesting User to request a Co-operating User to establish a
new Requested Call to a Destination User. This new Requested Call between the Co-operating and
Destination User can be either a Basic call or call independent signalling connection.
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 SS-MCR. The stage 1 specification
(Clause 6) specifies the supplementary service as seen by users of PISNs. The stage 2 specification
(Clause 7) specifies 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 referenced documents are indispensable for the application of this document. For dated
references, only the edition cited applies. For undated references, the latest edition of the referenced
document (including any amendments) applies.
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 11582:2002, Information technology — Telecommunications and information exchange between
systems — Private Integrated Services Network — Generic functional protocol for the support of
supplementary services — Inter-exchange signalling procedures and protocol
© ISO/IEC 2004 – All rights reserved 1

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
4 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
4.1 External definitions
This International Standard uses the following terms defined in other documents:
 Basic Service (ISO/IEC 11574)
 Call, Basic call (ISO/IEC 11582)
 Call independent signalling connection (ISO/IEC 11582)
 Call Independent (ISO/IEC 11582)
 Call Related (ISO/IEC 11582)
 Private Integrated services Network eXchange (PINX) (ISO/IEC 11579-1)
 Private Integrated Services Network (PISN) (ISO/IEC 11579-1)
 Service (ITU-T Rec. I.112)
 Signalling (ITU-T Rec. I.112)
 Supplementary Service (ITU-T Rec. I.210)
 User (ISO/IEC 11574)
4.2 Other definitions
4.2.1
Co-operating User
The user who receives a Make Call Request and who shall set up a new Requested Call to the Destination
User.
4.2.2
Destination User
The called user of the Requested Call i.e. the user to whom the Co-operating User shall establish a
Requested Call.
4.2.3
Make Call Request
A request from the Requesting User for a new call (i.e. Requested Call) between a Co-operating User and a
Destination User.
2 © ISO/IEC 2004 – All rights reserved

4.2.4
Original Call
The call between the Requesting User and the Co-operating User. The Original Call can be either a Basic call
or a call independent signalling connection and is correlated with the Requested Call.
4.2.5
Requested Call
The call between the Co-operating User and the Destination User that is established by the Co-operating User
due to a Make Call Request from the Requesting User. The Requested Call can either be a Basic call (with a
specific Basic Service) or a call independent signalling connection and is correlated with the Original Call.
4.2.6
Requesting User
The User who sends a Make Call Request to the Co-operating User with the request to establish a specific
Requested Call to the Destination User.
5 Acronyms
ANF Additional Network Feature
FE Functional Entity
ISDN Integrated Services Digital Network
MCR Make Call Request
PINX Private Integrated services Network eXchange
PISN Private Integrated Services Network
SDL Specification and Description Language
SS Supplementary Service
6 SS-MCR stage 1 specification
6.1 Description
6.1.1 General description
The supplementary service MCR enables a Requesting User to request a Co-operating User to establish a
new Requested Call to a Destination User. This new Requested Call between the Co-operating User and the
Destination User can either be a Basic call or a call independent signalling connection. The new Requested
Call shall be correlated to the Original Call between the Requesting User and the Co-operating User.
6.1.2 Qualifications on applicability to telecommunication services
This supplementary service is applicable to all basic telecommunication services.
6.2 Procedures
6.2.1 Provision / withdrawal
SS-MCR may be provided or withdrawn after pre-arrangement with the service provider or may be generally
available to all users.
© ISO/IEC 2004 – All rights reserved 3

6.2.2 Normal procedures
6.2.2.1 Activation, deactivation and interrogation
Not applicable.
6.2.2.2 Invocation and operation
A Requesting User may use SS-MCR to request the set up of a new Requested Call between
...