SIST EN 301 062-1 V1.2.3:2005

• Abstract:

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

• Status: Published
• Publication Date: 31-Dec-2004
• 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-Jan-2005
• Due Date: 01-Jan-2005
• Completion Date: 01-Jan-2005
• Ref Project: ETSI EN 301 062-1 V1.2.3 (1999-10) - 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 V1.2.3:2005 is the Slovenian adoption of ETSI EN 301 062-1 V1.2.3, a telecommunications standard for Integrated Services Digital Network (ISDN) signalling. It specifies protocol extensions that let Virtual Private Network (VPN) applications work over the public Network Node Interface (NNI) using Signalling System No.7, especially ISUP and Transaction Capability (TC). The standard is written for people designing, implementing, testing, or procuring ISDN and private-network signalling functions.

What does SIST EN 301 062-1 V1.2.3:2005 specify?

SIST EN 301 062-1 V1.2.3:2005 specifies the extensions needed for VPN support over the public NNI and explains how PSS1 information flows are carried transparently between PINX entities. The document is organized as Part 1 of a four-part EN, with companion parts for conformance and testing.

Part	What it covers
Part 1	Protocol specification
Part 2	Protocol Implementation Conformance Statement (PICS) proforma specification
Part 3	Test Suite Structure and Test Purposes (TSS&TP) specification
Part 4	Abstract Test Suite (ATS) and partial Protocol Implementation eXtra Information for Testing (PIXIT) specification

The scope centers on public-network support for private-network VPN services. It also introduces the concept of a Relay node and frames the document as a subset of the broader interworking space between ISDN signalling and extended DSS1.

What are the key requirements of SIST EN 301 062-1 V1.2.3:2005?

SIST EN 301 062-1 V1.2.3:2005 defines how VPN signalling is split between bearer-related and no-bearer cases. It uses the Application Transport Mechanism (APM) for bearer-related signalling and Transaction Capability (TC) for signalling with no bearer, so implementers must select the right user path for the call type.

VPN signalling over the public NNI

The standard states that the public NNI must provide transparency to private-network services. In practice, this means VPN-related information has to pass through the public network without breaking the private-network behavior seen by the PINX entities.

Continuity of PSS1 information flows

The document specifies the respective users, APM-user and TC-user, to keep PSS1 information flows continuous in VPN applications. That matters because the private-network information must survive across the public network boundary.

Network options at PINX nodes

The standard summarizes network options for transit PINX nodes and gateway PINX nodes, including full support, partial support, no support, continuation of calls with no application association, and relocation of gateway function. These options matter because they affect routing behavior and can change whether supplementary services behave as expected.

Interworking rules

For ISUP-related interworking, the document replaces the behavior specified in ETS 300 899. For the rest of the PSS1 interworking, it follows ETS 300 899. The text also says the interworking it describes is only a subset of all possible scenarios, focused on the relevant mapping between the interfaces being described.

Reference updates and terminology changes

Throughout the modified ITU-T recommendations, the standard replaces several references with ETSI or ETS documents and updates wording from ISUP '92 to ISUP v2 and from ISUP '97 to ISUP v3. In practice, this tells an implementer exactly which edition family the protocol text aligns with.

What terms does SIST EN 301 062-1 V1.2.3:2005 define?

• Integrated Services Digital Network (ISDN) - the digital telecommunication network environment for which the signalling applies.
• Virtual Private Network (VPN) - the private-network application supported across the public NNI.
• Network Node Interface (NNI) - the public-network interface where the VPN support is specified.
• Application Transport Mechanism (APM) - the signalling path used for bearer-related information.
• Transaction Capability (TC) - the signalling path used when no bearer is involved.
• Private network Q reference point Signalling System number 1 (PSS1) - the information flows that the standard keeps continuous between PINX entities.
• Private Integrated Services Network Exchange (PINX) - the private-network exchange entity used in the interworking model.

Who uses SIST EN 301 062-1 V1.2.3:2005?

Telecom equipment vendors use this standard to implement VPN signalling in ISDN/SS7 systems. Network architects and service engineers use it when designing public-network interworking with private-network behavior. Test laboratories and conformance teams use it together with Parts 2 to 4 to prepare declarations, test purposes, and abstract test suites. Buyers and operators use it to check whether a solution supports the VPN signaling model they need.

What changed in SIST EN 301 062-1 V1.2.3:2005 from the previous edition?

The document history records V1.2.3 as the October 1999 publication and V1.2.2 as the July 1998 publication. This edition is the later publication in the series.

Which standards are used with SIST EN 301 062-1 V1.2.3:2005?

Reference	What it contributes
ISO/IEC 11574	Circuit-mode 64 kbit/s bearer services
ISO/IEC 11572	Circuit mode bearer services signalling procedures
ISO/IEC 11582	Generic functional protocol for supplementary services
ISO/IEC 11579-1	Reference configuration for PISN exchanges (PINX)
ISO/IEC 15055	Transit counter additional network feature, specification and flows
ISO/IEC 15056	Transit counter additional network feature protocol
ETS 300 009	SCCP connectionless service support
EN 300 356-1	ISUP version 3 for the international interface
ETS 300 121	ISUP version 1 for international ISDN interconnections
ETS 300 134	TCAP
EN 301 060-1	DSS1 basic call applications for VPN
EN 301 061-1	DSS1 supplementary-services protocol for VPN
EN 301 069-1	APM protocol specification
ITU-T Q.1400	Signalling and OA&M protocol architecture framework
ITU-T X.680 to X.683	ASN.1 notation, objects, constraints, and parameterization
ETS 300 899	ISUP/DSS1 interworking baseline used for non-ISUP parts

What does the SIST EN 301 062-1 V1.2.3:2005 document contain?

The document contains the protocol specification for VPN support over the public NNI, including the text that modifies the referenced ITU-T recommendations. It also contains the table of network options, the reference-substitution table applied throughout the protocol text, and the wording that aligns ISUP and DSS1 interworking with the VPN use case. For implementation work, these sections are the basis for protocol design and interoperability checks, while the companion parts support conformance and testing.

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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 1.2.3
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.

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 ETSI EN 301 062-1 V1.2.3 (1999-10)
Reference
REN/SPAN-01032-1c1 (9u090iq0.PDF)
Keywords
ISDN, SS7, ISUP, VPN, PINX, PSS1, DSS1, TC
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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 1999.
All rights reserved.
ETSI
3 ETSI EN 301 062-1 V1.2.3 (1999-10)
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Foreword
This European Standard (Telecommunications series) has been produced by ETSI Technical Committee Services and
Protocols for Advanced Networks (SPAN).
The present document is part 1 of a multi-part EN covering 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, as identified below:
Part 1: Protocol specification;
Part 2: Protocol Implementation Conformance Statement (PICS) proforma specification;
Part 3: Test Suite Structure and Test Purposes (TSS&TP) specification;
Part 4: Abstract Test Suite (ATS) and partial Protocol Implementation eXtra Information for Testing (PIXIT)
specification.
National transposition dates
Date of latest announcement of this EN (doa): 31 January 2000
Date of latest publication of new National Standard
or endorsement of this EN (dop/e): 31 July 2000
Date of withdrawal of any conflicting National Standard (dow): 31 July 2000
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.
ETSI
4 ETSI EN 301 062-1 V1.2.3 (1999-10)
Scope and References clauses
Delete the clauses "Scope", "References" from ITU-T Recommendations Q.765.1 (1998-05) and Q.699.1 (1990-05) 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 requ
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