ISO/IEC 17310:2000

INTERNATIONAL ISO/IEC
STANDARD 17310
First edition
2000-09-15
Information technology —
Telecommunications and information
exchange between systems — Private
Integrated Services Network — Mapping
functions for the employment of 64 kbit/s
circuit mode connections with 16 kbit/s
sub-multiplexing
Technologies de l'information — Télécommunications et échange
d'information entre systèmes — Réseau privé avec intégration de
services — Fonctions d'application pour l'emploi de connexions en
mode circuit de 64 kbits/s avec sous-multiplexage de 16 kbits/s
Reference number
ISO/IEC 17310:2000(E)
©
ISO/IEC 2000

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ISO/IEC 17310:2000(E)
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ISO/IEC 17310:2000(E)
Contents
Foreword.iv
Introduction .v
1 Scope.1
2 Conformance .1
3 Normative references .1
4 Definitions.2
4.1 External definitions .2
4.2 Special definitions .2
4.2.1 Channel. .2
4.2.2 End PINX.2
4.2.3 Inter-PINX Connection. .2
4.2.4 Inter-PINX Link .2
4.2.5 Transit PINX .2
5 Abbreviations .2
6 Introduction .2
7 Capabilities at the Q reference point .3
8 Mapping functions.3
8.1 Physical adaptation.3
8.1.1 64 kbit/s Unrestricted Digital Leased Line (D64U) .3
8.2 Mapping Matrix.4
8.2.1 Channel allocation.4
8.2.2 Bearer Conditioning for the D -channel .4
Q
8.2.3 Bearer Conditioning for the U -channels.4
Q
Annexes
A Implementation Conformance Statement (ICS) Proforma.5
B Bibliography .8
C QSIG Protocol Codepoints .9
D Example figure for Bearer Conditioning of U -channels .10
Q
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ISO/IEC 17310:2000(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 17310 was prepared by ECMA (as ECMA-253) 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.
Annex A forms a normative part of this International Standard. Annexes B, C and D are for information only.
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ISO/IEC 17310:2000(E)
Introduction
This International Standard is one of a series of standards defining mapping functions in exchanges of Private Integrated
Services Networks. The series uses the ISDN concepts as developed by ITU-T (formerly CCITT) and is also within the
framework of standards for open systems interconnection as defined by ISO/IEC.
This International Standard specifies mapping functions for the type of scenario where two PINXs are interconnected via a
64 kbit/s circuit mode connection with 16 kbit/s sub-multiplexing.
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.
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INTERNATIONAL STANDARD ISO/IEC 17310:2000(E)
Information technology - Telecommunications and information exchange between
systems - Private Integrated Services Network - Mapping functions for the
employment of 64 kbit/s circuit mode connections with 16 kbit/s sub-multiplexing
1Scope
This International Standard defines the mapping functions in exchanges of Private Integrated Services Networks (PISNs)
required for the utilization of scenarios in which 64 kbit/s circuit mode connections are sub-multiplexed into 4 x 16 kbit/s
channels for carrying inter-PINX signalling and user information.
NOTE 1 - This International Standard has been prepared to meet the specific needs of an application for a particular user organisation.
However, it may also be applicable elsewhere. The requirements contained in this International Standard will be incorporated in any future
standard specifying a more generic approach to bearer conditioning.
In order to connect a Private Integrated Services Network Exchange (PINX) to another PINX, mapping functions are required
to adapt the specific interfaces at the C reference point to the application at the Q reference point. As such, mapping functions
provide for physical adaptation to the interface at the C reference point. Mapping functions also provide for the mapping of
user channels and signalling information at the Q reference point to the appropriate channels or timeslots at the C reference
point.
The C and Q reference points are defined in ISO/IEC 11579-1.
The type of interface at the C reference point covered by this International Standard is the 64 kbit/s Unrestricted Digital Leased
Line (D64U) Terminal Equipment Interface, in accordance with ITU-T Rec. G.703.
At the Q reference point the mapping provides a 16 kbit/s service for user channels to support the transfer of unrestricted
digital information and to support the transfer of speech, and a packet mode service for the signalling channel. The applied
mapping is a static mapping, i.e. there is a fixed relationship between user and signalling channels at the Q reference point and
the interface at the C reference point.
Management functions relating to failure management are outside the scope of this International Standard.
This International Standard is applicable to PINXs that can be interconnected to form a Private Integrated Services Network
(PISN) and that support signalling protocols at the Q reference point.
2 Conformance
In order to conform to this International Standard, a PINX shall satisfy the requirements identified in the Implementation
Conformance Statement (ICS) proforma in annex A.
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 11579-1:1994, Information technology — Telecommunications and information exchange between systems — Private
Integrated Services Network — Part 1: Reference configuration for PISN exchanges (PINX).
ITU-T Rec. G.703:1998, Physical / electrical characteristics of hierarchical digital interfaces.
ITU-T Rec. Q.920:1993, Digital Subscriber Signalling System No. 1 (DSS1) — ISDN user-network interface data link layer —
General aspects.
ITU-T Rec. Q.920 Am. 1:2000, Amendment 1 to ITU-T Recommendation Q.920.
ITU-T Rec. Q.921:1997, ISDN user-network interface — Data link layer specification.
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ISO/IEC 17310:2000(E)
ITU-T Rec. Q.921 Am. 1:2000, Amendment 1 to ITU-T Recommendation Q.921.
ITU-T Rec. I.112:1993, Vocabulary of terms for ISDNs.
ITU-T Rec. I.460:1999, Multiplexing, rate adaption and support of existing interfaces.
NOTE 2 - This International Standard also contains informative references. Details of these publications are given in annex B.
4 Definitions
4.1 External definitions
For the purposes of this International Standard, the following external definitions apply.
– Integrated Services Digital Network (CCITT Rec. I.112)
– Private Integrated Services Network (ISO/IEC 11579-1)
– Private Integrated Services Network Exchange (ISO/IEC 11579-1)
4.2 Special definitions
4.2.1 Channel : A means of bi-directional transmission of user or signalling information between two points.
4.2.1.1 D -Channel : A channel used to convey call control information between the Q reference points of two peer PINXs.
Q
4.2.1.2 U -Channel : A channel used to convey user information between the Q reference points of two PINXs.
Q
4.2.2 End PINX : In the context of a particular call, a PINX to which one of the users is attached (Originating PINX or
Terminating PINX) or a PINX at which signalling interworking occurs (Gateway PINX).
4.2.3 Inter-PINX Connection : A connection provided by an IVN between two C reference points used to transport inter-
PINX information from the PISN control plane and/or the PISN user plane.
4.2.4 Inter-PINX Link : A link between the Q reference points of two PINXs, comprising the totality of signalling transfer
and
...