ISO/IEC 11582:1995
(Main)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
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
Defines the signalling protocol for the control of Supplementary services and Additional Network Features (ANFs) at the Q reference point. The protocol ist part of Private Signalling system No. 1 (PSS1).
Technologies de l'information — Télécommunications et échange d'information entre systèmes — Réseau privé à intégration de services — Protocole générique fonctionnel pour le support de compléments de service — Procédures et protocole de signalisation entre commutateurs
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INTERNATIONAL
ISO/IEC
STANDARD
11582
First edition
1995-07-01
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
Technologies de I’information - Tbkcommunications et khange
d ‘in forma tions en tre sys tkmes - Rbseau privk 5 integration de
Services - Protocole g&Grique fonctionnel pour Ie support de
compkmen ts de Service - Procedures et protocole de signalisation entre
commutateurs
Reference number
ISO/1 EC 11582: 1995(E)
---------------------- Page: 1 ----------------------
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---------------------- Page: 2 ----------------------
o ISO/IEC ISOAEC 11582 : 1995 (E)
Foreword
ISO (the International Organization for Standardization) and IEC (the Inter-
national 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 com-
mittees collaborate in fields of mutual interest. Other international organ-
izations, 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, lSO/IEC JTC 1. Draft International Standards adopted
by the joint technical committee are circulated to national bodies for vot-
ing. Publication as an International Standard requires approval by at least
75 % of the national bodies casting a vote.
International Standard lSO/IEC 11582 was prepared by Joint Technical
Committee lSO/IEC JTC 1, Information technology, Subcommittee SC 6,
Telecommunications and information exchange between Systems.
Annexes A and B form an integral pa rt of this International Standard. An-
nexes C to I are for information only.
. . .
Ill
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0 ISOAEC
ISOhEC 11582 : 1995 (E)
Introduction
This International Standard is one of a series of Standards defining Services and
signalling protocols applicable to Private Integrated Services Digital Networks
(PISNs). The series uses ISDN concepts as developed by CCITT and conforms
to the framework of Standards on Open Systems Interconnection as defined by
ISO.
This International Standard defines the signalling protocol for use at the Q refer-
ence Point between two PINXs for the transport of protocol information as patt of
Supplementary Services and/or Additional Network Features (ANFs) within a
PISN.
The generic functional procedures provide a flexible and open ended approach to
the Provision of Supplementary Service and ANF protocols. These procedures
provide:
- generic protocols which may be utilised in the Provision of Supplementary
Services and ANFs, both related to existing calls and separate from
existing calls where appropriate to the capability required;
- a dialogue identification protocol to enable Supplementary Service or ANF
information flows to be tied together to form a dialogue;
- Supplementary Service and ANF transparency across a PISN, whereby
transit PINXs need have no knowledge of the capability provided to the
PISN user or PISN itself unless involved in the Provision of that capability;
and
- the capab ility for standardised and manufacturer specific capabilities to
coexist in both Single and mult i-vendor PISNs.
The protocol defined in this International Standard is based upon that described
in CCITT Recommendation GI.932 [Blue Book, 19881 including subsequent revi-
sions during the 1989-1992 Plenary period.
---------------------- Page: 4 ----------------------
INTERNATIONAL STANDARD 0 ISO/IEC
ISO/IEC 11582 : 1995 (E)
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
3 Normative references
1 Scope
This International Standard defines the signalling protocol The following Standards contain provisions which, through
for the control of Supplementary Services and Additional reference in this text, constitute provisions of this Interna-
Network Features (ANFs) at the Q reference Point. The tional Standard. At the time of publication, the editions indi-
protocol is patt of Private Signalling System No. 1 (PSSI). cated were valid. All Standards are subject to revision, and
The Q reference Point exists between Private Integrated Parties to agreements based on this International Standard
Services Network Exchanges (PINX) connected together are encouraged to investigate the possibility of applying the
within a Private Integrated Services Network (PISN) and is most recent editions of the Standards indicated below.
defined in ISO/lEC 11579. Detailed procedures applicable Members of IEC and ISO maintain registers of currently
to individual Supplementary Services and ANFs are beyond valid International Standards.
the scope of this International Standard and will be speci-
ISO/1 EC 11572: 1994, Information technology - Telecom-
fied by other Standards for those Services which are stan-
munications and information exchange between Systems -
dardised and by individual manufacturers for proprietary
Private Integrated Services Network - Circuit mode bearer
Services using the capabilities defined in this International
- Inter-exchange signalling procedures and
Services
Standard.
protocol.
ISO/IEC 11572 defines the Layer 3 protocol for circuit-
ISO/1 EC 11574: 1994, Information technology - Telecom-
switched call control at the Q reference Point. This Interna-
munications and information exchange between Systems -
tional Standard defines additional protocol procedures, to
In tegra ted Services Network - Circuit-mode
Private
be used in conjunction with those defined in ISO/IEC 11572
64 kbiVs bearer Services - Service descriptions, functional
for the control of Supplementary Services and ANFs.
model and information flows.
NOTE 1 - Typical examples of the application of these
generic functional procedures to some Supplementary ser- ISO/IEC 11579-1: 1994, Information technology - Telecom-
vices are provided in Annex A, for explanatory and illustrative
munications and information exchange between Systems -
pu rposes only.
Private integrated Services network - Part 1: Reference
configura tion for PISN Exchanges (PINX).
NOTE 2 - Specific Supplementary Services and Additional
Network Features may require additional information transfer
CCITT Rec. 1.112:1988, Vocabulary of terms for ISDNs
mechanisms which are Service or feature specific and are
[Blue Book, Volume Ill, Fascicle 111.7].
beyond the scope of this International Standard.
CCITT Rec. 1.210: 1988, CCITT Recommendation: Princi-
ples of Telecommunication Services Supporfed by an ISDN
2 Conformance
and the Means to Describe Them [Blue Book].
In Order to conform to this International Standard, a PINX
CCITT Rec. X.208:1988, Specification of Abstract Syntax
shall satisfy the requirements identified in the Protocol
Notation One (ASN. 1) [Blue Book].
Implementation Conformance Statement (PICS) proforma
in Annex A.
CCITT Rec. X.209:1988, Encoding Rules for Abstract Syn-
tax Notation One (ASN. 1) [Blue Book].
---------------------- Page: 5 ----------------------
0 ISOAEC
ISO/IEC 11582 : 1995 (E)
associated user-information connection.
CCITT Rec. X.217: 1988, Association control Service defini-
tion for Open Systems Interconnection for CCITT Applica-
4.8 Cal1 independent
Gons [Blue Book].
A property of information which is conveyed across the Q
CCITT Rec. X.219:1988, ßemote Operations Model, Nota-
reference Point in a message which does not use a call ref-
tion and Service [Blue Book].
erence which has an associated user-information connec-
tion (that is, using a Connectionless or Connection oriented
CCITT Rec. X.227:1988, Association controlprotocol spec-
transport mechanism as defined in 7.2 or 7.3).
ification for Open Systems Interconnection for CCITT
Applica tions [Blue Book].
4.9 Cal1 related
CCITT Ret, X.229:1988, ßemote Operations Protocol
A property of information which is conveyed across the Q
Specifica tion [Blue BookJ.
reference Point in a message which uses a cal1 reference
which has an associated user-information connection.
4 Definitions
4.10 Connection oriented
For the purposes of this International Standard, the follow-
ing defi nitions apply.
Communication between peer protocol entities by means
of a connection or association established by an underlying
4.1 External definitions
layer.
This International Standard uses the following terms
4.11 Connectionless
defined in other documents:
Communication between peer protocol entities by means
- Object Identifier (CCITT Rec.
of an unacknowledged, unidirectional transport mechanism
X.208)
provided by an underlying layer.
- Private Integrated Services Network Exchange (PINX)
(lSO/lEC 11579)
4.12 Coordination Function
- Private Integrated Services Network (ISO/IEC 11579)
An entity which provides Coordination between various SS-
- Service (CCITT Rec.
Control entities, ROSE, ACSE, DSE, GFT-Control and Cal1
1.112)
Control for different Supplementary Services (see clause
- Signalling (CCITT Rec.
6).
1.112)
(ISO/IEC 11574)
- User 4.13 Destination PINX
4.2 ACSE APDU In the context of a Single one-way exchange of information
between two SS-Control entities, the PINX where the
An APDU defined by the Association Control Service Ele-
receiving SS-Control entity is Iocated.
ment (ACSE).
4.14 DSE APDU
4.3 Additional Network Feature (ANF)
An APDU defined by the Dialogue Service Element.
A capability provided by a PISN,
not generally directly to a
User, over and above that of the Basic call.
4.15 Dialogue Service Element (DSE)
4.4 Adjacent PINX
A Service element which provides Services to SS-Control
via the Coordination Function that associate ROSE or
A PINX as considered from another PINX to which it is
ACSE APDUs which are not implicitly associated by an
directly connected via one or more inter-PINX links.
underlying network layer connection.
4.5 Application Protocol Data Unit (APDU)
4.16 End PINX
A sequence of data elements exchanged between peer
In the context of a particular call, an Originating or Termi-
application layer entities, e.g. ACSE APDUs, DSE APDUs
nating PINX. lt tan also be a Gateway PINX, dependent on
and ROSE APDUs
the capabilities of the signalling System being interworked
(i.e. unless it transports APDUs unchanged to or from the
4.6 Call, Basic call
other signalling System).
An instance of the use of a basic Service.
4.17 Gateway PINX
4.7 Call independent signalling connection
Sub-clause 4.6 of ISO/IEC 11572 shall apply. Dependent
on the capabilities of the signalling System being inter-
A signalling connection established between SS-Control
worked by the Gateway PINX, it tan act as a Transit or an
entities located in different PINXs that does not have an
End PINX in the context of the Supplementary Services
---------------------- Page: 6 ----------------------
ISOAEC 11582 : 1995 (E)
0 ISO/IEC
APDUs. That is, it tan either transport the APDUs - it is intended to be delivered only to terminals and is
unchanged to or from the other signalling System, perhaps therefore passed on transparently by PINXs;
embedded in some other protocol unit, or process the
- it does not Cause a Change of state on either side of
APDUs and perform an interworking function of the infor-
the Q reference Point;
mation flows and encoding of the Supplementary Service
- it represents a one-way flow of information that
concerned.
requires no response; and
- it provides additional information that tan be
4.18 Generic Functional Transport Control
discarded without the need for significant error
(GFT-Control) entity
recovety if it is unrecognised by the terminal.
The entity that exists within a PINX and provides a range of
4.28 Originating PINX
Services (defined in clause 6) to SS-Control, ROSE, ACSE
and DSE via the Coordination Function.
Sub-clause 4.5 of ISO/IEC 11572 shall apply. In addition,
the term is also applied to a PINX which originates a Call
4.19 Incoming side
independent signalling connection.
In the context of a Call independent signalling connection,
4.29 Outgoing side
the Side which receives the request for connection estab-
Iishment from the Preceding PINX.
In the context of a Call independent signalling connection,
the Side which sends the request for connection establish-
4.20 Interpretation APDU
ment to the Next PINX.
An APDU defined by the Coordination Function.
receding PINX
Sub-clause 4.7 of lSO/IEC 11572 shall apply. In addition,
The totality of a signalling channel and a number (2 0) of the term is also applied in a similar way to a PINX partici-
user information channels (which may have different char- patinq in a Call independent signalling connection.
.
acteristics) at the Q reference Point.
.31 Private Signalling System No.1
4.22 lnvocation
The generic name given to the signalling protocol that
A request by a SS-Control entity to perform an Operation in exists conceptually at the ‘Q’ reference Point and is defined
a remote SS-Control entity. in this and other Standards. This protocol is visibie and
indirectly testable at the ‘C’ reference Point (see ISO/IEC
4.23 Link significance
11579).
A proper-ty of a Facility information element which does not
4.32 Protocol Control
contain a Network Facility Extension octet group. lt indi-
cates that the element has only significance on a Single An entity which exists within a PINX and provides a range
inter-PINX link - i.e. only between two Adjacent PINXs. of Services (defined in clause 6) to the Generic Functional
Transport Control entity.
4.24 Mistyped
4.33 ROSE APDU
A property of an APDU whose structure does not conform
to the structure defined in clause 11 of this International An APDU defined by the Remote Operations Service Ele-
Standard or the structure defined for a particular Supple- ment (ROSE).
mentary Service.
4.34 Side
4.25 Network significance
The Protocol Control entity within a PINX at one end of an
A property of a Facility information element which includes
inter-PINX link.
a Network Facility Extension octet group. lt indicates that
4.35 Signalling Carriage Mechanism (SCM)
the element has significance between two PINXs which are
not necessarily Adjacent.
that transports messages betwee
The i nfrastructure n Pro-
tocol Control entiti two interconnected P INXs.
4.26 Next PINX
4.36 Source PINX
An Adjacent PINX to which an APDU is to be sent in the
context of an existing signalling connection (related to a
In the context of a Single one-way exchange of information
call or independent of a call).
between two SS-Control entities, the PINX where the send-
ing SS-Control entity is located.
4.27 Notification
A piece of protocol information which has the following
properties:
---------------------- Page: 7 ----------------------
0 ISO/IEC
ISOhEC 11582 : 1995 (E)
PICS Protocol Implementation Conformance State-
4.37 Subsequent PINX
ment
Sub-clause 4.7 of ISO/IEC 11572 shall apply. In addition,
PISN Private Integrated Services Network
the term is also applied in a similar way to a PINX partici-
PINX Private Integrated Services Network
pating in a Call independent signalling connection.
Exchange
4.38 Supplementary Service PSSI Private Signalling System no. 1
Remote Operations
RO
Section 2.4 of CCITT Recommendation 1.210 shall apply.
Remote Operations Service Element
ROSE
For the purpose of this International Standard, ANFs shall
RTSE Reliable Transfer Service Element
be regarded as Supplementary Services.
Signalling Carriage Mechanism
SCM
Supplementary Service
SS
4.39 Supplementary Services Control (SS-Con-
trol) entity
6 General principles
An entity that exists within a PINX and provides the proce-
dures associated with the support of a particular Supple-
The generic functional protocol defined in this International
mentary Service.
Standard provides the means to exchange signalling infor-
mation for the control of Supplementary Services over a
4.40 Terminating PINX
PISN. lt does not by itself control any Supplementary ser-
vice but rather provides generic Services to specific SS-
Sub-clause 4.5 of ISO/IEC 11572 shall apply. In addition,
Control entities. Procedures for individual Supplementary
the term is also applied to a PINX which terminates a Call
Services based on these generic procedures are defined in
independent signalling connection.
other Standards or may be manufacturer-specific.
4.41 Terminal, Terminal Equipment
The generic functional protocol operates at the Q reference
Point between two PINXs in conjunction with a Layer 3 pro-
a telec ommunication net-
An item of equipment attac hed to
tocol for Basic call control (ISO/IEC 11572). Together these
or more Services.
wo rk to provide access for a user to one
use the Services of the Signalling Carriage Mechanism
4.42 Transit PINX (SCM).
The generic functional protocol provides mechanisms for
Sub-clause 4.5 of ISO/IEC 11572 shall apply. In addition,
the support of Supplementary Services which relate to
the term is also applied to a PINX which participates in the
existing basic calls or are entirely independent of any exist-
Provision of a Call independent signalling connection, but
ing basic calls. In performing a Supplementary Service,
does not originate or terminate that connection.
whether Call independent or Call related, use may be
4.43 Unrecognised made of both the Cal1 related (7.1) and Cal1 independent
(7.2 and 7.3) information transfer procedures.
A property of a message, information element, APDU or
Operation value whose type identifier is not one supported If a particular Supplementary Service comprises Call
by the Destination PINX.
related and Call independent information transfer proce-
dures or relates to several basic calls at the same time it is
- for the purpose of this International Standard - deemed to
5 List of acronyms
consist of separate instances of Call related (one for each
call) and Call independent Services respectively. The com-
ACSE Association Control Service Element
bined use of two or more instances of Cal1 related and/or
AE Application Entity
Call independent procedures in support of a particular Sup-
plementary Service is outside the scope of this International
Additional Network Feature
ANF
Standard.
APDU Application Protocol Data Unit
ASN.l Abstract Syntax Notation One
6.1 Application Association
BER Basic Encoding Rules
Supplementary Service operations require an association
DSE Dialogue Service Element
between the respective peer SS-Control entities. This Inter-
DSSI Digital Subscriber Signalling no. 1
national Standard provides three means by which this
association tan be achieved:
FIE Facility information element
implicitly by the network layer connection in the case
GFT Generic Functional Transport
4
of Call related connections and for call-independent
ICD International Code Designator
signalling connections;
MSI Manufacturer Specific Information
b) implicitly by the application layer dialogue Service, in
NFE Network Facility Extension
which case the association is independent of the
Protocol Control
PC
underlying network layer connections and tan use a
combination of different mechanisms, including Call
---------------------- Page: 8 ----------------------
C
01 SOIIEC ISO/IEC 11582 : 1995 (E)
independent Connectionless information transfer or, tional Transport Control (GFT-Control) at the network layer
via the Coordination Function. GFT-Control uses the ser-
explicitly by use of the Association Control Service
4
vices of Protocol Control at the network Iayer.
Element (ACSE, X.217/227) in conjunction with the
underlying mechanisms provided in (a) and (b).
The Remote Operations Service Element (ROSE) is
defined in CCITT Rec. X.219.
6.2 Protocol Model
The Association Control Service Element (ACSE) is
Figure 1 Shows the conceptual model for the generic func-
defined in CCITT Rec. X.217.
tional protocol and its relation to the Basic call model
defined in ISO/IEC 11572.
NOTE - In the application of ROSE for the support of
Supplementary Services in PS!31 the underlying Services used
At the top layer (the application layer) the actual Supple-
by ROSE are those provided by GFT-Control or those pro-
mentary Service protocol operates between peer Supple-
vided by the Association Control Service Entity (ACSE). No
mentary Services Control (SS-Control) entities which are
use is made of the Services of the Reliable Transport Service
service-specific. The Operation of specific SS-Control enti-
Element(RTSE).
ties is beyond the scope of this International Standard.
The Dialogue Service Element (DSE) provides a means of
SS-Control entities use the Services of the Remote Opera-
associating ACSE or ROSE APDUs which are not implicitly
tions Service Element (ROSE), the Association Control
associated by an underlying network layer connection.
Service Element (ACSE) and the Dialogue Service Ele-
The Coordination Function provides Coordination between
ment (DSE) at the application layer via the Coordination
Function. These entities use the Services of Generic Func-
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