SIST ETS 300 649 E1:2004

• Abstract:

  Definition of the supplementary service calling line identification restriction for the PSTN

• Status: Published
• Publication Date: 30-Sep-2004
• ICS: 33.040.35 - Telephone networks
• Technical Committee: SPS - Signalling protocols and switching
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 01-Oct-2004
• Due Date: 01-Oct-2004
• Completion Date: 01-Oct-2004
• Mandate: T-036-SI
• Ref Project: ETSI ETS 300 649 ed.1 (1997-03) - Public Switched Telephone Network (PSTN); Calling Line Identification Restriction (CLIR) supplementary service; Service description

Overview

SIST ETS 300 649 E1:2004 defines the supplementary service of Calling Line Identification Restriction (CLIR) for Public Switched Telephone Networks (PSTN). Developed by the Slovenski inštitut za standardizacijo (SIST) in alignment with the European Telecommunications Standards Institute (ETSI), this standard outlines the overall service description (stage 1) for CLIR as experienced by end users in public telephone networks. The document is vital for network operators, service providers, and telecom equipment manufacturers who need to ensure privacy for calling parties by restricting their line identity display to called parties.

Keywords: CLIR, PSTN, call privacy, line identification restriction, telecommunication standards

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Key Topics

• CLIR Functionality:
  The CLIR supplementary service allows the calling party to restrict the display of their phone number or identity to the recipient. This supports the privacy preferences of end users.

• Service Operation Modes:

  • Permanent mode - CLIR is invoked for every outgoing call by default.
  • Temporary mode - Users can enable or disable CLIR on a per-call basis.
  • Service options and default settings are controlled through prior arrangements or general availability.

• Interworking and Compatibility:
  CLIR interworks between PSTN and other networks, including ISDN (Integrated Services Digital Network), PLMN (Public Land Mobile Network), and private networks, with appropriate interworking procedures to maintain privacy.

• User Experience:

  • Calling users can control number display based on subscription.
  • Called users with Calling Line Identification Presentation (CLIP) active will see an indication that the calling number is restricted if CLIR is enabled.
  • Some users (e.g., emergency services) may have override privileges, depending on national regulations.

• Interactions with Other Services:
  CLIR typically overrides the CLIP service unless an override category is invoked for the called party.

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Applications

Practical value and key applications of SIST ETS 300 649 E1:2004:

• Subscriber Privacy Protection:
  Telecom providers use CLIR to guarantee calling party anonymity, crucial for individuals and organizations wishing to keep their identity confidential.

• Regulatory Compliance:
  The standard ensures that network operators meet European privacy and data protection regulations regarding caller identification.

• Inter-network Call Handling:
  By defining interworking with ISDNs, PLMNs, and private networks, the standard enables seamless privacy enforcement across network boundaries, maintaining the calling party’s preferences.

• Telecom Service Provisioning:
  Operators and service providers reference this standard when enabling or customizing supplementary services related to calling line identification, ensuring consistent operation and user experience.

• Equipment Development:
  The standard provides technical requirements for manufacturers developing telephony equipment or systems supporting CLIR functionality over PSTN analog access.

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Related Standards

Network operators and telecom professionals may need to reference these standards alongside SIST ETS 300 649 E1:2004 for comprehensive service implementation:

• ETSI ETS 300 648:
  Service description for Calling Line Identification Presentation (CLIP) in PSTN.

• ETSI ETS 300 659-1:
  Subscriber line protocol over the local loop for display and related services, underpinning CLIR implementation.

• ETSI ETS 300 089 & ETS 300 090:
  ISDN supplementary services for CLIP and CLIR, respectively.

• CCITT Recommendation I.130:
  Methods for characterizing and structuring telecommunication services in ISDN environments.

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In summary:
SIST ETS 300 649 E1:2004 is the authoritative guide for service providers and manufacturers implementing Calling Line Identification Restriction on PSTN. By ensuring privacy, enforcing inter-network compatibility, and defining essential user service controls, the standard plays a central role in modern telephone network operations.

SLOVENSKI STANDARD
01-oktober-2004
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LGHQWLWLILNDFLMHNOLþRþHJD&/,52SLVVWRULWYH
Public Switched Telephone Network (PSTN); Calling Line Identification Restriction
(CLIR) supplementary service; Service description
Ta slovenski standard je istoveten z: ETS 300 649 Edition 1
ICS:
33.040.35 Telefonska omrežja Telephone networks
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN ETS 300 649
TELECOMMUNICATION March 1997
STANDARD
Source: ETSI TC-NA Reference: DE/NA-010024
ICS: 33.020
Key words: CLIR, PSTN, supplementary service, stage 1
Public Switched Telephone Network (PSTN);
Calling Line Identification Restriction (CLIR)
supplementary service;
Service description
ETSI
European Telecommunications Standards Institute
ETSI Secretariat
Postal address: F-06921 Sophia Antipolis CEDEX - FRANCE
Office address: 650 Route des Lucioles - Sophia Antipolis - Valbonne - FRANCE
X.400: c=fr, a=atlas, p=etsi, s=secretariat - Internet: [e-mail]
Tel.: [phone] - Fax: [phone]
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 1997. All rights reserved.

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ETS 300 649: March 1997
Whilst every care has been taken in the preparation and publication of this document, errors in content,
typographical or otherwise, may occur. If you have comments concerning its accuracy, please write to
"ETSI Editing and Committee Support Dept." at the address shown on the title page.

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ETS 300 649: March 1997
Contents
Foreword .5
1 Scope .7
2 Normative references.7
3 Definitions.8
4 Abbreviations.8
5 Description .8
6 Procedures.8
6.1 Provision and withdrawal .8
6.2 Normal procedures .9
6.2.1 Registration and erasure.9
6.2.2 Activation and deactivation.9
6.2.3 Invocation and operation .9
6.2.3.1 Calling user side .9
6.2.3.2 Called user side.9
6.2.4 Interrogation .10
6.3 Exceptional procedures .10
6.3.1 Registration and erasure.10
6.3.2 Activation and deactivation.10
6.3.3 Invocation and operation .10
6.3.4 Interrogation .10
7 Intercommunication considerations.10
7.1 Interworking with public ISDNs .10
7.2 Interworking with private networks.10
7.3 Interworking with PLMNs .10
8 Interactions with other supplementary services .11
8.1 Calling line identification presentation.11
8.2 Calling line identification restriction.11
History.12

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ETS 300 649: March 1997
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ETS 300 649: March 1997
Foreword
This European Telecommunication Standard (ETS) has been produced by the Network Aspects (NA)
Technical Committee of the European Telecommunications Standards Institute (ETSI).
In accordance with CCITT Recommendation I.130 [3], the following three level structure is used to
describe supplementary telecommunications services for the Integrated Services Digital Network (ISDN):
- Stage 1: is an overall service description, from the user's standpoint;
- Stage 2: identifies the functional capabilities and information flows needed to support the service
described in stage 1; and
- Stage 3: defines the signalling system protocols and switching functions needed to implement the
service described in stage 1.
The principle of this three level structure has been used to develop the service description for the Calling
Line Identification Restriction (CLIR) supplementary service as provided by European public
telecommunication operators for the Public Switched Telephone Network (PSTN).
This ETS details the stage 1 aspects (overall service description) for the Calling Line Identification
Restriction (CLIR) supplementary service for the PSTN.
ETS 300 659-1 [5] specifies the subscriber line protocol for the CLIR supplementary service.
Transposition dates
Date of adoption 21 February 1997
Date of latest announcement of this ETS (doa): 30 June 1997
Date of latest publication of new National Standard
or endorsement of this ETS (dop/e): 31 December 1997
Date of withdrawal of any conflicting National Standard (dow): 31 December 1997

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ETS 300 649: March 1997
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ETS 300 649: March 1997
1 Scope
This European Telecommunication Standard (ETS) defines the stage one of the Calling Line Identification
Restriction (CLIR) supplementary service for the Public Switched Telephone Network (PSTN) as provided
by European public network operators. Stage one is an overall service description from the user's point of
view (see CCITT Recommendation I.130 [3]), but does not deal with the details of the human interface
itself.
This ETS defines the interworking requirements between PSTNs and private networks, PSTNs and
Integrated Services Digital Networks (ISDNs), and Public Land Mobile Networks (PLMNs).
Interactions with supplementary services not listed in clause 8 are outside the scope of this ETS.
Charging principles are outside the scope of this ETS.
The CLIR supplementary service enables the calling party to prevent presentation of its calling line identity
to the called party.
This ETS is applicable to the ETS containing the subscriber line protocol to support the CLIR
supplementary service. Where the text indicates the status of a requirement (i.e. as strict command or
prohibition, as authorization leaving freedom, or as a capability or possibility), this shall be reflected in the
text of that standard.
Furthermore, conformance to this ETS is met by conforming to the standards containing the subscriber
line protocol to support the CLIR supplementary service with the field of application appropriate to the
equipment being implemented. Therefore no method of testing is provided for this ETS.
2 Normative references
This ETS incorporates by dated or undated reference provisions
...