ISO/IEC 21992:2003
(Main)Information technology — Telecommunications and information exchange between systems — Private Integrated Services Network — Mapping functions for the tunnelling of QSIG through IP networks
Information technology — Telecommunications and information exchange between systems — Private Integrated Services Network — Mapping functions for the tunnelling of QSIG through IP networks
ISO/IEC 21992:2003(E) specifies functions for using a packet network that uses the Internet Protocol (IP) as its network layer protocol and UDP and TCP as its transport layer protocols, to interconnect two Private Integrated services Network eXchanges (PINXs) forming part of a Private Integrated Services Network (PISN). Interconnection is achieved by carrying the inter-PINX signalling protocol directly over the Transmission Control Protocol (TCP) and inter-PINX user information (e.g. voice) over the Real-time Transport Protocol (RTP), RTP being carried over the User Datagram Protocol (UDP). The inter-PINX signalling protocol is assumed to be QSIG, as specified in ISO/IEC 11572, ISO/IEC 11582 and other International Standards. ISO/IEC 21992:2003(E) provides for two types of interconnection: on-demand, where a separate TCP connection for QSIG is established at the start of each call and cleared down at the end of that call; and semi-permanent, where a single TCP connection with an indefinite lifetime carries QSIG on behalf of many single calls. ISO/IEC 21992:2003(E) is applicable to PINXs that can be interconnected to form a PISN using QSIG as the inter-PINX signalling protocol.
Technologies de l'information — Télécommunications et échange d'information entre systèmes — Réseau privé à intégration de services — Tracé de fonctions pour le "tunnelling" de QSIG par des réseaux IP
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INTERNATIONAL ISO/IEC
STANDARD 21992
First edition
2003-06-01
Information technology —
Telecommunications and information
exchange between systems — Private
Integrated Services Network — Mapping
functions for the tunnelling of QSIG
through IP networks
Technologies de l'information — Télécommunications et échange
d'information entre systèmes — Réseau privé à intégration de
services — Tracé de fonctions pour le «tunnelling» de QSIG par des
réseaux IP
Reference number
©
ISO/IEC 2003
PDF disclaimer
This PDF file may contain embedded typefaces. In accordance with Adobe's licensing policy, this file may be printed or viewed but
shall not be edited unless the typefaces which are embedded are licensed to and installed on the computer performing the editing. In
downloading this file, parties accept therein the responsibility of not infringing Adobe's licensing policy. The ISO Central Secretariat
accepts no liability in this area.
Adobe is a trademark of Adobe Systems Incorporated.
Details of the software products used to create this PDF file can be found in the General Info relative to the file; the PDF-creation
parameters were optimized for printing. Every care has been taken to ensure that the file is suitable for use by ISO member bodies. In
the unlikely event that a problem relating to it is found, please inform the Central Secretariat at the address given below.
© ISO/IEC 2003
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means,
electronic or mechanical, including photocopying and microfilm, without permission in writing from either ISO at the address below or
ISO's member body in the country of the requester.
ISO copyright office
Case postale 56 • CH-1211 Geneva 20
Tel. + 41 22 749 01 11
Fax + 41 22 749 09 47
E-mail copyright@iso.org
Web www.iso.org
Published in Switzerland
ii © ISO/IEC 2003 — 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 List of acronyms . 3
6 Introduction. 3
6.1 Reference configuration. 3
6.2 Specific scenarios. 4
7 Capabilities at the Q reference point . 4
8 Capabilities at the C reference point. 5
8.1 TCP connection. 5
8.2 UDP streams. 6
9 Mapping functions. 6
9.1 Mapping the D -channel. 6
Q
9.2 Mapping a U -channel . 6
Q
10 IPC control functions. 6
10.1 Procedure for U -channel establishment. 6
Q
10.2 Procedure for U -channel clearing . 7
Q
Annex A (informative) Implementation Conformance Statement (ICS) Proforma . 8
A.1 Introduction. 8
A.2 Instructions for completing the ICS proforma . 8
A.2.1 General structure of the ICS proforma . 8
A.2.2 Additional information. 9
A.2.3 Exception information. 9
A.3 ICS proforma for ISO/IEC 21992 . 10
A.3.1 Implementation identification. 10
A.3.2 Implementation summary. 10
A.4 General requirements. 10
A.5 U -channel bearer capabilities at the Q reference point. 11
Q
A.6 D -channel capability at the Q reference point. 11
Q
A.7 Capabilities at the C reference point. 11
A.8 Mapping functions. 11
A.9 IPC control functions. 12
A.10 Support of resource control information. 12
A.10.1 Support of bearer capabilities information . 12
A.10.2 Support of IP address type . 12
Annex B (normative) Message syntax for Resource Control Information . 13
B.1 Introduction. 13
B.2 Message syntax. 13
B.2.1 Resource control header. 13
B.2.2 Protocol indicator. 13
B.2.3 Resource control information. 13
© ISO/IEC 2003 — 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 21992 was prepared by ECMA (as ECMA-336) 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 2003 — All rights reserved
Introduction
This International Standard is one of a series of standards defining mapping functions in exchanges of Private
Integrated Services Networks required for the utilization of intervening network scenarios. 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 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.
© ISO/IEC 2003 — All rights reserved v
INTERNATIONAL STANDARD ISO/IEC 21992:2003(E)
Information technology — Telecommunications and information
exchange between systems — Private Integrated Services
Network — Mapping functions for the tunnelling of QSIG
through IP networks
1 Scope
This International Standard specifies functions for using a packet network that uses the Internet Protocol (IP)
as its network layer protocol and UDP and TCP as its transport layer protocols, to interconnect two Private
Integrated services Network eXchanges (PINXs) forming part of a Private Integrated Services Network (PISN).
Interconnection is achieved by carrying the inter-PINX signalling protocol directly over the Transmission
Control Protocol (TCP) and inter-PINX user information (e.g., voice) over the Real-time Transport Protocol
(RTP), RTP being carried over the User Datagram Protocol (UDP). The inter-PINX signalling protocol is
assumed to be QSIG, as specified in ISO/IEC 11572, ISO/IEC 11582 and other International Standards.
This International Standard provides for two types of interconnection:
on-demand, where a separate TCP connection for QSIG is established at the start of each call and
cleared down at the end of that call; and
semi-permanent, where a single TCP connection with an indefinite lifetime carries QSIG on behalf of
many single calls.
This International Standard is applicable to PINXs that can be interconnected to form a PISN using QSIG as
the inter-PINX signalling protocol.
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 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 11572:2000, Information technology — Telecommunications and information exchange between
systems — Private Integrated Services Network — Circuit mode bearer services — Inter-exchange signalling
procedures and protocol
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 2003 — All rights reserved 1
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
IETF RFC 760, Internet Protocol
IETF RFC 761, Transmission Control Protocol
IETF RFC 768, U
...
INTERNATIONAL ISO/IEC
STANDARD 21992
First edition
2003-06-01
Information technology —
Telecommunications and information
exchange between systems — Private
Integrated Services Network — Mapping
functions for the tunnelling of QSIG
through IP networks
Technologies de l'information — Télécommunications et échange
d'information entre systèmes — Réseau privé à intégration de
services — Tracé de fonctions pour le «tunnelling» de QSIG par des
réseaux IP
Reference number
©
ISO/IEC 2003
PDF disclaimer
This PDF file may contain embedded typefaces. In accordance with Adobe's licensing policy, this file may be printed or viewed but
shall not be edited unless the typefaces which are embedded are licensed to and installed on the computer performing the editing. In
downloading this file, parties accept therein the responsibility of not infringing Adobe's licensing policy. The ISO Central Secretariat
accepts no liability in this area.
Adobe is a trademark of Adobe Systems Incorporated.
Details of the software products used to create this PDF file can be found in the General Info relative to the file; the PDF-creation
parameters were optimized for printing. Every care has been taken to ensure that the file is suitable for use by ISO member bodies. In
the unlikely event that a problem relating to it is found, please inform the Central Secretariat at the address given below.
© ISO/IEC 2003
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means,
electronic or mechanical, including photocopying and microfilm, without permission in writing from either ISO at the address below or
ISO's member body in the country of the requester.
ISO copyright office
Case postale 56 • CH-1211 Geneva 20
Tel. + 41 22 749 01 11
Fax + 41 22 749 09 47
E-mail copyright@iso.org
Web www.iso.org
Published in Switzerland
ii © ISO/IEC 2003 — 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 List of acronyms . 3
6 Introduction. 3
6.1 Reference configuration. 3
6.2 Specific scenarios. 4
7 Capabilities at the Q reference point . 4
8 Capabilities at the C reference point. 5
8.1 TCP connection. 5
8.2 UDP streams. 6
9 Mapping functions. 6
9.1 Mapping the D -channel. 6
Q
9.2 Mapping a U -channel . 6
Q
10 IPC control functions. 6
10.1 Procedure for U -channel establishment. 6
Q
10.2 Procedure for U -channel clearing . 7
Q
Annex A (informative) Implementation Conformance Statement (ICS) Proforma . 8
A.1 Introduction. 8
A.2 Instructions for completing the ICS proforma . 8
A.2.1 General structure of the ICS proforma . 8
A.2.2 Additional information. 9
A.2.3 Exception information. 9
A.3 ICS proforma for ISO/IEC 21992 . 10
A.3.1 Implementation identification. 10
A.3.2 Implementation summary. 10
A.4 General requirements. 10
A.5 U -channel bearer capabilities at the Q reference point. 11
Q
A.6 D -channel capability at the Q reference point. 11
Q
A.7 Capabilities at the C reference point. 11
A.8 Mapping functions. 11
A.9 IPC control functions. 12
A.10 Support of resource control information. 12
A.10.1 Support of bearer capabilities information . 12
A.10.2 Support of IP address type . 12
Annex B (normative) Message syntax for Resource Control Information . 13
B.1 Introduction. 13
B.2 Message syntax. 13
B.2.1 Resource control header. 13
B.2.2 Protocol indicator. 13
B.2.3 Resource control information. 13
© ISO/IEC 2003 — 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 21992 was prepared by ECMA (as ECMA-336) 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 2003 — All rights reserved
Introduction
This International Standard is one of a series of standards defining mapping functions in exchanges of Private
Integrated Services Networks required for the utilization of intervening network scenarios. 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 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.
© ISO/IEC 2003 — All rights reserved v
INTERNATIONAL STANDARD ISO/IEC 21992:2003(E)
Information technology — Telecommunications and information
exchange between systems — Private Integrated Services
Network — Mapping functions for the tunnelling of QSIG
through IP networks
1 Scope
This International Standard specifies functions for using a packet network that uses the Internet Protocol (IP)
as its network layer protocol and UDP and TCP as its transport layer protocols, to interconnect two Private
Integrated services Network eXchanges (PINXs) forming part of a Private Integrated Services Network (PISN).
Interconnection is achieved by carrying the inter-PINX signalling protocol directly over the Transmission
Control Protocol (TCP) and inter-PINX user information (e.g., voice) over the Real-time Transport Protocol
(RTP), RTP being carried over the User Datagram Protocol (UDP). The inter-PINX signalling protocol is
assumed to be QSIG, as specified in ISO/IEC 11572, ISO/IEC 11582 and other International Standards.
This International Standard provides for two types of interconnection:
on-demand, where a separate TCP connection for QSIG is established at the start of each call and
cleared down at the end of that call; and
semi-permanent, where a single TCP connection with an indefinite lifetime carries QSIG on behalf of
many single calls.
This International Standard is applicable to PINXs that can be interconnected to form a PISN using QSIG as
the inter-PINX signalling protocol.
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 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 11572:2000, Information technology — Telecommunications and information exchange between
systems — Private Integrated Services Network — Circuit mode bearer services — Inter-exchange signalling
procedures and protocol
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 2003 — All rights reserved 1
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
IETF RFC 760, Internet Protocol
IETF RFC 761, Transmission Control Protocol
IETF RFC 768, U
...
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