SIST EN 301 062-1 V1.2.2:2005

• Abstract:

  The definition of extensions to the NNI protocols (ISUP, TC) to enable the support of VPN applications.

• Status: Published
• Publication Date: 31-Mar-2005
• Withdrawal Date: 30-Sep-2003
• ICS: 33.080 - Integrated Services Digital Network (ISDN)
• Technical Committee: SPN - Services and Protocols for Networks
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 01-Apr-2005
• Due Date: 01-Apr-2005
• Completion Date: 01-Apr-2005
• Ref Project: ETSI EN 301 062-1 V1.2.2 (1998-07) - Integrated Services Digital Network (ISDN); Signalling System No.7; Support of Virtual Private Network (VPN) applications with Private network Q reference point Signalling System number 1 (PSS1) information flows; Part 1: Protocol specification [ITU-T Recommendations Q.765.1 and Q.699.1, modified]

SIST EN 301 062-1 V1.2.2:2005 is the Slovenian adoption of ETSI EN 301 062-1 V1.2.2, a European Telecommunications Standard from ETSI. It specifies protocol extensions for Integrated Services Digital Network (ISDN) Signalling System No.7 to support Virtual Private Network (VPN) applications over the public Network Node Interface (NNI), using Private network Q reference point Signalling System number 1 (PSS1) information flows. It is intended for engineers and operators who implement, test, or assess ISUP, Transaction Capability (TC), and related interworking for private-network signaling over public networks.

What does SIST EN 301 062-1 V1.2.2:2005 specify?

SIST EN 301 062-1 V1.2.2:2005 specifies the extensions needed to carry VPN applications across the public NNI while keeping private-network behavior transparent. The document ties together bearer-related signaling through the Application Transport Mechanism (APM) and non-bearer signaling through TC, so implementers can choose the right signaling path for each case.

The scope says the document also defines how PSS1 information flows are transferred transparently between Private Integrated Services Network Exchange (PINX) entities, and it introduces the concept of a relay node. It further covers interworking between Signalling System Number 7 (SS7) and extended DSS1 for VPN applications with PSS1 information flows.

The document is organized around a replaced scope and normative references section, reference substitutions throughout the text, and two normative annexes with protocol modifications.

Annex	What it covers
Annex A	Modifications to ITU-T Recommendation Q.765.1
Annex B	Modifications to ITU-T Recommendation Q.699.1

What are the key requirements of SIST EN 301 062-1 V1.2.2:2005?

• Public NNI transparency for VPNs - The document requires the public NNI to preserve private-network service behavior by transporting PSS1 information flows transparently between PINX entities. In practice, this is what allows a VPN service to cross the public network without losing its private-network call handling.

• APM and TC split by signaling type - The scope assigns bearer-related signaling to APM and signaling with no bearer to TC. Implementers need to route each VPN signaling case to the correct user, because the wrong choice affects call setup and service behavior.

• Network options in Table 1 - The document defines options for GFP functionality at transit and gateway PINX nodes, continuation of calls with no application association, and relocation of gateway function. These options matter because some combinations can change supplementary-service behavior, require special routing, or cause a call to be released.

• Sub-set interworking model - The interworking described for SS7 and extended DSS1 is only a sub-set of all possible scenarios. This means the document is a mapping guide for the supported paths, not a blanket description of every VPN interworking case.

• Reference substitutions throughout the text - The document replaces several ITU-T references with ETSI and ISO/IEC documents, including ISUP, TCAP, DSS1 VPN, APM, and ASN.1-related references. In practice, a conforming implementation must follow the modified ETSI mapping rather than the original unmodified ITU-T references where stated.

• State alignment in VPN call control - Annex A says the VPN Application Process is responsible for keeping the public basic call state and the PSS1 Call Control state aligned. That matters because mismatched states can break call progress handling and release behavior.

• Overlap sending and Sending Complete handling - Annex A adds handling for the Sending Complete parameter in primitives and in the Application Transport Parameter. This affects how setup information is acknowledged and how overlap sending is carried through the signaling path.

• ASN.1 and parameter details - Annex A adjusts the ASN.1 module and APP-related content, including the maxCauseLength value and the treatment of the Corporate Telecommunications Network Identifier (CNID) length. These details matter for protocol encoding, interoperability, and conformance testing.

What terms does SIST EN 301 062-1 V1.2.2:2005 define?

• Application Transport Mechanism (APM) - The bearer-related signaling mechanism used to carry application information in the VPN support procedures.
• Transaction Capability (TC) - The signaling capability used for VPN-related signaling that does not involve a bearer.
• Private network Q reference point Signalling System number 1 (PSS1) - The private-network signaling flow that the document preserves transparently across the public network.
• Private Integrated Services Network Exchange (PINX) - A private-network exchange used in the interworking model and in the transparent transfer of PSS1 information.
• Private Integrated Services Network (PISN) - The private network model defined by the ISO standards cited in the references.
• Network Node Interface (NNI) - The public network interface over which the VPN support procedures are applied.
• Corporate Telecommunications Network Identifier (CNID) - An identifier used in the NNI-specific information carried in the Application Transport Parameter.

Who uses SIST EN 301 062-1 V1.2.2:2005?

This standard is used by telecommunications equipment vendors, network architects, protocol implementers, and operators working with ISDN, SS7, ISUP, TC, DSS1, and VPN services. It is also relevant for test and conformance teams that need to verify signaling behavior across public-private network boundaries. Buyers and quality managers use it to check whether a product supports the VPN signaling features and interworking paths they need.

Which standards are used with SIST EN 301 062-1 V1.2.2:2005?

Reference	What it contributes
ISO/IEC 11574, 11572, 11582, 11579-1	PISN service description, bearer services, supplementary services, and PINX reference configuration
ISO/IEC 15055, 15056	Transit counter additional network feature, including its signaling protocol
ETS 300 009, EN 300 356-1, ETS 300 121, ETS 300 134	SCCP, ISUP, and TCAP references for the SS7 environment
EN 301 060-1, EN 301 061-1, EN 301 069-1	DSS1 VPN support, supplementary services, and APM protocol specification
ETS 300 899	Baseline interworking between ISUP and DSS1 for VPN mapping
ITU-T Q.1400, X.680, X.681, X.682, X.683	Architecture framework and ASN.1 notation, constraints, and parameterization

What does the SIST EN 301 062-1 V1.2.2:2005 document contain?

The document contains a replaced scope and normative references section, a table of network options, and reference substitutions throughout the text of the adopted ITU-T recommendations. Annex A and Annex B give detailed modification lists for Q.765.1 and Q.699.1, including abbreviation updates, call-state and overlap-sending changes, ASN.1 notes, and APP-related parameter handling.

It also includes tables for private-network information carried in the Application Transport Parameter and for NNI-specific information, plus edits to named tables in the referenced recommendations. These parts are mainly used for protocol design, implementation, and interoperability testing.

SLOVENSKI STANDARD
01-april-2005
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Integrated Services Digital Network (ISDN); Signalling System No.7; Support of Virtual
Private Network (VPN) applications with Private network Q reference point Signalling
System number 1 (PSS1) information flows; Part 1: Protocol specification [ITU-T
Recommendations Q.765.1 and Q.699.1, modified]
Ta slovenski standard je istoveten z: EN 301 062-1 Version 1.2.2
ICS:
33.080 Digitalno omrežje z Integrated Services Digital
integriranimi storitvami Network (ISDN)
(ISDN)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN 301 062-1 V1.2.2 (1998-07)
European Standard (Telecommunications series)
Integrated Services Digital Network (ISDN);
Signalling System No.7;
Support of Virtual Private Network (VPN) applications
with Private network Q reference point
Signalling System number 1 (PSS1) information flows;
Part 1: Protocol specification
[ITU-T Recommendations Q.765.1 and Q.699.1, modified]

2 EN 301 062-1 V1.2.2 (1998-07)
Reference
DEN/SPS-01032-1 (9u090ipc.PDF)
Keywords
ISDN, SS7, ISUP, VPN, PINX, PSS1, DSS1
ETSI
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Copyright Notification
No part may be reproduced except as authorized by written permission.
The copyright and the foregoing restriction extend to reproduction in all media.
© European Telecommunications Standards Institute 1998.
All rights reserved.
ETSI
3 EN 301 062-1 V1.2.2 (1998-07)
Intellectual Property Rights
IPRs essential or potentially essential to the present document may have been declared to ETSI. The information
pertaining to these essential IPRs, if any, is publicly available for ETSI members and non-members, and can be found
in SR 000 314: "Intellectual Property Rights (IPRs); Essential, or potentially Essential, IPRs notified to ETSI in respect
of ETSI standards", which is available free of charge from the ETSI Secretariat. Latest updates are available on the
ETSI Web server (http://www.etsi.fr/ipr or http://www.etsi.org/ipr).
Pursuant to the ETSI IPR Policy, no investigation, including IPR searches, has been carried out by ETSI. No guarantee
can be given as to the existence of other IPRs not referenced in SR 000 314 (or the updates on the ETSI Web server)
which are, or may be, or may become, essential to the present document.
Foreword
This European Standard (Telecommunications series) has been produced by ETSI Technical Committee Signalling
Protocols and Switching (SPS).
National transposition dates
Date of adoption of this EN: 17 April 1998
Date of latest announcement of this EN (doa): 31 July 1998
Date of latest publication of new National Standard 31 January 1999
or endorsement of this EN (dop/e):
Date of withdrawal of any conflicting National Standard (dow): 31 January 1999
Endorsement notice
The text of draft ITU-T Recommendations Q.765.1 and Q.699.1 was approved by ETSI as an EN with agreed
modifications as given below.
Intellectual Property Rights.3
Foreword .3
Endorsement notice .3
Scope and References clauses . 5
Scope5
Normative references .5
Throughout . the text of ITU-T Recommendations Q.765.1 and Q.699.1 7
Modifications. to ITU-T Recommendation Q.765.1 7
Modifications. to ITU-T Recommendation Q.699.1 7
Annex A (normative): Modifications to ITU-T Recommendation Q.765.1.8
A.1 Modifications to be included in this EN if not adopted by ITU-T.8
Clause 4, Abbreviations:. 8
Clause 5, Recommendation structure. 8
Subclause 6.2.2, General model. 8
Subclause 7.2.1, Introduction. 9
A.2 Modifications to be removed from this EN on publication .9
Subclause 7.2.3.2.4, Acknowledgement from peer application (overlap sending). 9
ETSI
4 EN 301 062-1 V1.2.2 (1998-07)
Subclause 7.2.6, Primitive contents . 9
Subclause 11.8, ASN.1 module . 9
Subclause 14.1, Private network specific information to be carried within the Application Transport Parameter . 9
Subclause 14.2, NNI specific Information to be transported in the Application Transport Parameter . 10
Annex B (normative): Modifications to ITU-T Recommendation Q.699.1.11
B.1 Modifications to be included in this EN if not adopted by ITU-T.11
Clause 4, Abbreviations. 11
Subclause 5.3.1, Sending of the Initial address message (IAM) . 11
Subclause 5.3.1, Table 2/Q.699.1 . 12
Subclause 6.1.1, Table 25/Q.699.1 . 12
Subclause 6.1.2, Table 26/Q.699.1 . 12
B.2 Modifications to be removed from this EN on publication .12
History.13
not yet been adopted by ITU-T prior to the submission for Vote of the present document. This endorsement is based
upon the drafts of those Recommendations which accompany the present document, located in an archive
file named 9u090ipc.lzh.
ETSI
5 EN 301 062-1 V1.2.2 (1998-07)
Scope and References clauses
Delete the clauses "Scope", "References" from ITU-T Recommendations Q.765.1 and Q.699.1 and replace with the
following two clauses (Scope and Normative references):
Scope
The present document describes the extensions required for the support of Virtual Private Network (VPN) applications
over the public Network Node Interface (NNI). This application makes use of the Application Transport Mechanism
(APM) described in EN 301 069-1 for bearer related signalling, and the Transaction Capability (TC) for signalling
involving no bearer. The present document specifies the respective users (i.e. APM-user, TC-user) to support the PSS1
information flows continuity in VPN applications (Transparent transfer of PSS1 information flows between PINX
entities). The public NNI provides transparency to the services of the private network.
The private network functionality is defined by ISO in its series of standards for Private Integrated Services Network
(PISN). In addition, the concept of a "Relay node" is introduced by the present document.
The present document provides for a number of network options. These are summarized in table 1.
Table 1: Network options
Option Values Remarks
Support of GFP functionality at transit Full support
PINX nodes
(subclause 6.2.5) Partial support Not applicable in the international
network (note 1)
Support of GFP functionality at gateway Full support
PINX nodes
(subclause 6.2.6) No support (note 1)
Continuation of calls with no application Supported (note 2)
association
(subclause 6.2.6) Not supported (note 3)
Relocation of gateway function Supported
(subclause 6.2.6) Not supported
NOTE 1:  Use of these options might result in certain private network supplementary services behaving
in an unexpected manner or not working at all.
NOTE 2:  In this case VPN calls has to be routed using a mechanism which can correctly route the call to
the terminating access without use of the VPN procedures specified in the present document.
NOTE 3:  In this case, it is required that the VPN procedures are only used on calls which are routed to
addresses which are known to support the VPN application via signalling which supports the
APM, otherwise the call will be released.
In addition, this EN describes the interworking between Signalling System Number 7 (ISDN) and extended DSS1 for
the support of VPN applications with PSS1 information flows. For the interworking in this EN related to ISUP, these
replace that specified in ETS 300 899 whereas all other interworking of PSS1 information flows is according to that
specified in ETS 300 899.
The interworking described here provides a sub-set of all possible interworking scenarios and is therefore intended to
describe only the relevant mapping of information flows between the two interfaces being described.
Normative references
References may be made to:
a)  specific versions of publications (identified by date of publication, edition number, version number, etc.), in
which case, subsequent revisions to the referenced document do not apply; or
ETSI
6 EN 301 062-1 V1.2.2 (1998-07)
b)  all versions up to and including the identified version (identified by "up to and including" before the version
identity); or
c)  all versions subsequent to and including the identified version (identified by "onwards" following the version
identity); or
d)  publications without mention of a specific version, in which case the latest version applies.
A non-specific reference to an ETS shall also be taken to refer to later versions published as an EN with the same
number.
[1]            ISO/IEC 11574: " 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".
[2]            ISO/IEC 11572 Second edition and Amendments 1 and 2: "Information technology --
Telecommunications and information exchange between systems -- Private Integrated Services
Network -- Circuit mode bearer services -- Inter-exchange signalling procedures and protocol".
[3]            ISO/IEC 11582: " Information technology -- Telecommunications and information exchange
between systems -- Private Integrated
...