ISO/IEC 15505:1997

INTERNATIONAL
ISOAEC
STANDARD
15505
First edition
1997-12-01
Information technology -
Telecommunications and information
exchange between Systems - Private
Integrated Services Network -
Specification, functional model and
information flows
- Message waiting
indication supplementary Service
Technologies de I’informa tion - T&communications et khange
d ’information entre systemes - Rkseau priv6 2 intkgration de Services -
Spkcifica tions, modele fonctionnel et flux d ’informa tions - Service
suppkmentaire d ’indica tion d ’a tten te de message

---------------------- Page: 1 ----------------------
ISO/IEC 15505: 1997 (E)
Contents
iv
Foreword
Introduction V
1
1 Scope
1
2 Conformance
1
3 Normative references
1
4 Defmitions
1
4.1 Extemal definitions
2
4.2 Other definitions
2
5 List of acronyms
2
6 SS-MWI Stage 1 specification
2
6.1 Description
2
6.1.1 General description
2
6.1.2 Qualifications on applicability to telecommunication Services
2
6.2 Procedures
2
6.2.1 Provision / withdrawal
2
6.2.2 Normal procedures
3
6.2.3 Exceptional procedures
3
6.3 Interactions with other Supplementary Services / Additional Network Features
3
6.3.1 Advice of Charge (AOC)
3
6.3.2 Cal1 Deflection (CD)
3
6.3.3 Cal1 Forwarding Unconditional (CFU)
3
6.3.4 Cal1 Forwarding Busy (CFB)
3
6.3.5 Cal1 Forwarding No Reply (CFNR)
3
6.3.6 Cal1 Interception (CINT)
3
6.3.7 Cal1 Intrusion (CI)
4
6.3.8 Cal1 Offer (CO)
4
6.3.9 Cal1 Transfer (CT)
4
6.3.10 CallingKonnected Line Identification Restriction (CLIR)
4
6.3.11 CallingKonnected Name Identification Restriction (CNIR)
4
6.3.12 Calling Line Identification Presentation (CLIP)
4
6.3.13 Calling Name Identification Presentation (CNIP)
4
6.3.14 Connected Line Identification Presentation (COLP)
4
6.3.15 Connected Name Identification Presentation (CONP)
4
6.3.16 Completion of Calls to Busy Subscribers (CCBS)
4
6.3.17 Completion of Calls on No Reply (CCNR)
4
6.3.18 DO Not Disturb (DND)
4
6.3.19 DO Not Disturb Override (DNDO)
0 ISOAEC 1997
utilized in any form or by any means, electronie
All rights resetved. Unless otherwise specified, no part of this pu blication may be reproduced or
isher.
0r mechanical, including photocopying and microfil m, without Permission in writing from the publ
ISOAEC Copyright Office * Case Postale 56 * CH-121 1 Geneve 20 * Switzerland
Printed in Switzerland
11

---------------------- Page: 2 ----------------------
ISO/IEC 15505: 1997 (E)
OISO/IEC
4
6.3.20 Path Replacement (PR)
4
6.3.21 Recall (RE)
4
6.3.22 Route Restriction Class (RRC)
4
6.4 Interworking considerations
4
6.5 Overall SDL
8
7 SS-MWI Stage 2 specification
8
7.1 Functional model
8
7.1.1 Functional model description
8
7.1.2 Description of Functional Entities
8
7.1.3 Relationship of functional model to Basic Cal1 functional model
8
7.2 Information flows
8
7.2.1 Definition of information flows
11
7.2.2 Relationship of information flows to Basic Cal1 information flows
11
7.2.3 Information flow sequences
13
7.3 Functional Entity actions
13
7.3.1 Functional Entity actions of FE1
13
7.3.2 Functional Entity actions of FE2
14
7.4 Functional Entity behaviour
14
7.4.1 Behaviour of FE1
15
7.4.2 Behaviour of FE2
16
7.5 Allocation of Functional Entities to physical equipment
16
7.6 Interworking considerations
. . .
111

---------------------- Page: 3 ----------------------
ISO/IEC 15505: 1997 (E) OISO/IEC
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, govemmental 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. 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.
International Standard ISO/IEC 15505 was prepared by ECMA (as ECMA-241) and was adopted, under a special “fast-track
procedure’ ’ , by Joint Technical Committee ISOLIEC JTC 1, Infownation technology, in parallel with its approval by national
bodies of ISO and IEC.
iv

---------------------- Page: 4 ----------------------
OISO/IEC
ISO/IEC 15505: 1997 (E)
Introduction
This International Standard is one of a series of Standards defining Services and signalling protocols applicable to Private
Integrated Services Networks. The series uses the ISDN concepts as developed by ITU-T and is also within the framework of
Standards for open Systems interconnection as defined by ISO.
This International Standard specifies the Message Waiting Indication 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 JTC 1, 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 ISDNs.

---------------------- Page: 5 ----------------------
This page intentionally left blank

---------------------- Page: 6 ----------------------
._
ISO/IEC 15505: 1997 (E)
INTERNATIONAL STANDARD 0 ISO/IEC
Telecommunications and information exchange between
Information technology -
Specification, functional model
Systems - Private Integrated Services Network -
and information flows - Message waiting indication supplementary Service
P Scope
This International Standard specifies supplementary Service Message Waiting Indication (SS-MWI), which is related to
various basic Services supported by Private Integrated Services Networks (PISNs). Basic Services are specified in ISO/IEC
11574.
This supplementary Service MWI enables a Served User to be sent a Message Waiting Indication and also enables this
Message Waiting Indication to be cancelled.
0
Service specifications are produced in three stages, according to the method described in CCITT Rec. 1.130. This International
Standard contains the Stage 1 and Stage 2 specifications of SS-MWI. 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.
Conformance
2
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 Standards contain provisions which, through reference in this text, constitute provisions of this International
Standard. At the time of publication, the editions indicated were valid. All Standards are subject to revision, and Parties to ag-
reements based on this International Standard are encouraged to investigate the possibility of applying the most recent editions
of the Standards indicated below. Members of IEC and ISO maintain registers of currently valid International Standards.
Information technology - Telecommunications and information exchange between Systems -
ISO/IEC 11574: 1994,
Private Integrated Services Network - Circuit-mode 64 kbit/s bearer Services - Service
description, functional capabilities and information flows,
Telecommunications and Information exchange between Systems -
ISOIIEC 11579- P : 1994, Information technology -
Private Integrated Services Network - Part I: Reference configuration for PISN Exchanges
(PINX).
ITU-T Rec. 1.112: 1993, Vocabuiary of terms for ISDNs.
CCITT Rec. 1.130: 1988, Method for the characterization of telecommunication Services supported by an ISDN and network
capabilities of an ISDN.
Principles of telecommunication Services supported by an ISDN and the means to describe them.
ITU-T Rec. 1.2 10: 1993,
ITU-T Rec. 2.100: 1993, Specification and description language.
4 Definitions
For the purposes of this International Standard, the following definitions apply.
4.1 External definitions
This International Standard uses the following terms defined in other documents:
- Basic Service (ITU-T Rec. 1.210)
- Private Integrated Services Network Exchange (PINX) (ISOIIEC 11579-1)
- Private Integrated Services Network (PISN) (ISO/IEC 11579- 1)
- Service (ITU-T Rec. I. 112)
- Signalling QITU-T Rec. I. 112)

---------------------- Page: 7 ----------------------
OISO/IEC
ISO/IEC 155051997 (E)
(ITU-T Rec. 1.210)
- Supplementary Service
(ISO/IEC 11574)
- User
4.2
Other definitions
4.2.1 Served User : The User to whom the Message Waiting Indication is sent on initiative of the Message Centre.
4.2.2 Message Centre : The entity which activates or deactivates the Message Waiting Indication as a result of the storage or
retrieval of messages.
4.2.3 Message Waiting Indication : An indication to the Served User when messages are waiting for the Served User.
Note - The indication may be a lamp, special tone, display etc. This is outside the scope of this International Standard.
5
List of acronyms
ANF Additional Network Feature
FE Functional Entity
ISDN Integrated Services Digital Network
MWI Message Waiting Indication
PISN Private Integrated Services Network
PINX Private Integrated Services Network Exchange
SDL Specification and Description Language
SS Supplementary Service
6 SS-MWI Stage 1 specification
6.1 Description
6.1.1 General description
The supplementary Service MWI enables a Served User to be sent a Message Waiting Indication and also enables this Message
Waiting Indication to be cancelled.
Waiting Indication is
Note - The sent on activation by the Message Centre.
Note - The Message Waiting Indication is cancelled on deactivation by the Message Centre.
A Served User tan receive separate MWIs for each of the basic Services for which there is a message waiting.
Note - A basic Service for which there is a message waiting would usually be the basic Service used to retrieve that message.
6.1.2 Qualifications on applicability to teiecommunication Services
This supplementary Service does not apply directly to any basic telecommunication Service. However, a MWI relates to a basic
Service for which there are messages waiting. It tan relate to any of the basic Services defined in ISO/IEC 11574.
Procedures
6.2
6.2.1 Provision / withdrawal
SS-MWI may be provided or withdrawn after pre-arrangement with the Service provider or may be generally available to all
users.
6.2.2 Normal procedures
6.2.2.1 Activation, deactivation and interrogation
The PISN shall provide activation / deactivation by the Message Centre. In addition, the PISN may provide interrogation by the
Served User.
To activate SS-MWI, the Message Centre shall supply the PISN number and the basic Service for which there is a message
waiting and may, as an implementation Option, add any combination of the following pieces of information: the identity of the
Message Centre; the number of messages waiting for the Served User for that basic Service; the address of the user that left a
message; the time when a message was left; the priority of the highest priority message waiting for that basic Service. After
activation, SS-MWI may be activated again whenever the number of waiting messages changes.
2

---------------------- Page: 8 ----------------------
OISO/IEC ISO/IEX 155051997 (E)
To deactivate SS-MWI, the Message Centre shall supply the PISN number and the basic Service for which there is no longer a
message waiting.
As a result of activation, a MWI shall be sent to the Served User. The MWI may include information on messages waiting, if
provided by the Message Centre. As a result of deactivation, the MWI at the Served User, for the basic Service concemed, shall
be cancelled.
When the Message Centre activates or deactivates SS-MWI at the Served User, it shall be provided with an indication of
acceptance.
When the Served User interrogates SS-MWI for a particular basic Service, the Message Centre shall provide the Served User
with an indication of whether SS-MWI is activated for that basic Service and may add, as an implementation Option, any of the
following information:
0
the identity of the Message Centre;
0
the number of messages waiting;
0
the address of the user that left a message;
l the time when a message was left;
0 waiting.
the priority of the highest priority message
When the Served User interrogates SS-MWI for all basic Services, the Message Centre shall provide the Served User with a list
of basic Services for which SS-MWI is active and, as an implementation Option, for each basic Service, any of the additional
information listed above.
6.2.2.2 Invocation and Operation
Not applicable.
6.2.3 Exceptional procedures
6.2.3.1 Activation, deactivation and interrogation
If the Served User cannot accept activation or deactivation, then the Message Centre shall be informed and may also be given
the reason. If the PISN cannot accept interrogation, then the Served User shall be informed and may also be given a reason.
6.2.3.2 Invocation and Operation
None.
6.3 Interactions with o
...