SIST ETS 300 392-10-20 E1:2003

• Abstract:

  Analysis of predicted needs for digital trunked systems in Europe; definition of services to be provided; analysis of spectrum req ments; characteristics of relevant interfaces Contains: TETRA 03.60 to 03.85

• Status: Published
• Publication Date: 30-Nov-2003
• ICS: 33.070.10 - Terrestrial Trunked Radio (TETRA)
• Technical Committee: SS EIT - Technical Board for the electrotechnical, information technology and telecommunications fields
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 01-Dec-2003
• Due Date: 01-Dec-2003
• Completion Date: 01-Dec-2003
• Mandate: T-172-1A
• Ref Project: ETSI ETS 300 392-10-20 ed.1 (1996-04) - Terrestrial Trunked Radio (TETRA); Voice plus Data (V+D); Part 10: Supplementary services stage 1; Sub-part 20: Discreet listening

Overview

SIST ETS 300 392-10-20 E1:2003 defines the stage 1 specifications for the Discreet Listening (DL) supplementary service within Terrestrial Trunked Radio (TETRA) systems. Developed by the Slovenian Institute for Standardization (SIST), this standard aligns with European requirements for digital trunked radio, particularly focusing on the Voice plus Data (V+D) mode. The document describes how authorized users can monitor TETRA communications discreetly, the relevant procedures, and the service’s interaction with other supplementary features.

TETRA discreet listening is a critical functionality for organizations such as public safety agencies, transportation, and utility companies using digital trunked radio. It enables monitoring of group or one-to-one calls without alerting the parties involved, which is vital for supervisory, security, or legal monitoring scenarios.

Key Topics

• Definition and Scope: The standard specifies discreet listening as a supplementary service allowing an authorized user to silently monitor ongoing communications (voice or data) between TETRA subscribers. Only users with proper authorization can access this functionality.
• Service Description and Activation:
  • DL can be enabled for specific talk groups and services by prearrangement with the network operator.
  • Service activation and deactivation are controlled by the monitoring party or network, either per call or as a permanent setting.
  • The monitoring party receives notifications on the activation outcome, including relevant talk group and service details.
• Operational Procedures:
  • Procedures include activation, deactivation, registration of permissible talk groups, interrogation (to check status), and network-based invocation.
  • Optional features may allow the monitoring party to join or terminate (force release) the call if necessary.
• Exceptional Cases: The standard outlines responses for unsuccessful activation, registration, or interrogation attempts, including notification to the user and possible causes for rejection (such as unauthorized groups or invalid requests).
• Interaction with Other Services:
  • DL operates independently of most other TETRA supplementary services, such as call forwarding, call hold, and priority call.
  • Some service conflicts (e.g., with dispatcher authorization) are resolved by the service provider.
  • DL is not available across intersystem interfaces, ensuring operational integrity within a single network.

Applications

The discreet listening service defined in this standard is essential for:

• Public safety organizations (police, fire, emergency medical): Enables supervisory staff to monitor live operations and intervene or collaborate as necessary, enhancing situational awareness and operational security.
• Transport and utilities sectors: Allows authorized control-room operators to oversee staff communications for efficiency, troubleshooting, or compliance monitoring.
• Critical communications networks: Used for training, incident investigation, or legal compliance by ensuring select users can monitor communications non-intrusively.
• Network management and auditing: Provides operators with tools to oversee network usage and call quality without disrupting end-user experience.

Related Standards

For a comprehensive understanding and deployment of TETRA systems and supplementary services, consider these closely related standards:

• ETSI EN 300 392-1 to EN 300 392-16: Covers various aspects of TETRA systems, including network design, air interface, gateways, security, management services, and supplementary services at various implementation stages.
• ETSI EN 300 392-10: Specifies general requirements for TETRA supplementary services, forming the basis for Sub-part 20 (Discreet Listening).
• ITU-T Recommendations (e.g., I.130, Z.100): Provide methodology for service characterization and the Specification and Description Language (SDL) used in TETRA service modeling.
• Other TETRA supplementary services standards: For features such as call forwarding, call waiting, talking party identification, and dynamic group number assignment.

By adhering to SIST ETS 300 392-10-20 E1:2003, organizations ensure standardized implementation of discreet listening in TETRA networks, enhancing security and operational control while maintaining interoperability and compliance with European regulations.

SLOVENSKI STANDARD
01-december-2003
Radijska oprema in sistemi (RES) - Vseevropski prizemni snopovni radio (TETRA) -
Govor in podatki (V+D) - 10. del: Dopolnilne storitve stopnje 1 - 10-20. del:
Nezaznavno poslušanje
Terrestrial Trunked Radio (TETRA); Voice plus Data (V+D); Part 10: Supplementary
services stage 1; Sub-part 20: Discreet listening
Ta slovenski standard je istoveten z: ETS 300 392-10-20 Edition 1
ICS:
33.070.10 Prizemni snopovni radio Terrestrial Trunked Radio
(TETRA) (TETRA)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN ETS 300 392-10-20
TELECOMMUNICATION April 1996
STANDARD
Source: ETSI TC-RES Reference: DE/RES-06001-10-20
ICS: 33.020, 33.060.50
Key words: TETRA, V+D
Radio Equipment and Systems (RES);
Trans-European Trunked Radio (TETRA);
Voice plus Data (V+D);
Part 10: Supplementary services stage 1;
Part 10-20: Discreet listening
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 1996. All rights reserved.

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ETS 300 392-10-20: April 1996
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 300 392-10-20: April 1996
Contents
Foreword .5
1 Scope .7
2 Normative references.7
3 Definitions and abbreviations .7
3.1 Definitions .7
3.2 Abbreviations .8
3.2.1 General abbreviations .8
3.2.2 Supplementary service abbreviations .8
4 SS-DL stage 1 specification .9
4.1 Description.9
4.1.1 General description .9
4.1.2 Qualifications on applicability to telecommunication services.9
4.2 Procedures.9
4.2.1 Provision/Withdrawal.9
4.2.2 Normal procedures.9
4.2.2.1 Activation, Deactivation, Definition, Registration,
Interrogation, Cancellation.9
4.2.2.1.1 Activation .9
4.2.2.1.2 Deactivation .10
4.2.2.1.3 Definition.10
4.2.2.1.4 Registration.10
4.2.2.1.5 Interrogation.10
4.2.2.1.6 Cancellation .10
4.2.2.2 Invocation and operation .10
4.2.2.2.1 Basic operation .10
4.2.2.2.2 Forced release.11
4.2.2.2.3 Intrusion .11
4.2.3 Exceptional procedures.11
4.2.3.1 Activation, Deactivation, Definition, Registration,
Interrogation, Cancellation.11
4.2.3.1.1 Activation .11
4.2.3.1.2 Deactivation .11
4.2.3.1.3 Definition.11
4.2.3.1.4 Registration.11
4.2.3.1.5 Interrogation.12
4.2.3.1.6 Cancellation .12
4.2.3.2 Invocation and operation .12
4.3 Interactions with other supplementary services.12
4.3.1 Calling Line Identification Presentation (CLIP).12
4.3.2 Connected Line Identification Presentation (COLP).12
4.3.3 Calling/Connected Line Identification Restriction (CLIR) .12
4.3.4 Call Report (CR).12
4.3.5 Talking Party Identification (TIP) .12
4.3.6 Call Forwarding Unconditional (CFU).12
4.3.7 Call Forwarding on Busy (CFB).12
4.3.8 Call Forwarding on No Reply (CFNRy) .12
4.3.9 Call Forwarding on Not Reachable (CFNR).12
4.3.10 List Search Call (LSC).13
4.3.11 Call Authorized by Dispatcher (CAD) .13
4.3.12 Short Number Addressing (SNA) .13
4.3.13 Area Selection (AS).13
4.3.14 Access Priority (AP) .13
4.3.15 Priority Call (PC).13

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ETS 300 392-10-20: April 1996
4.3.16 Call Waiting (CW). 13
4.3.17 Call Hold (HOLD). 13
4.3.18 Automatic call completion. 13
4.3.19 Late Entry (LE). 13
4.3.20 Transfer of Control (TC) . 13
4.3.21 Pre-emptive Priority Call (PPC) . 13
4.3.22 Include Call (IC) . 13
4.3.23 Advice of Charge (AC). 13
4.3.24 Barring of Outgoing Calls (BOC) . 14
4.3.25 Barring of Incoming Calls (BIC) . 14
4.3.26 Discreet Listening (DL) . 14
4.3.27 Ambience Listening (AL). 14
4.3.28 Dynamic Group Number Assignment (DGNA) . 14
4.4 Inter-working considerations . 14
4.5 Overall SDL. 15
History. 19

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ETS 300 392-10-20: April 1996
Foreword
This European Telecommunication Standard (ETS) has been produced by the Radio Equipment and
Systems (RES) Technical Committee of the European Telecommunications Standards Institute (ETSI).
This ETS is a multi-part standard and will consist of the following parts:
Part 1: "General network design".
Part 2: "Air Interface (AI)".
Part 3: "Inter-working", (DE/RES-06001-3).
Part 4: "Gateways", (DE/RES-06001-4).
Part 5: "Terminal equipment interface", (DE/RES-06001-5).
Part 6: "Line connected stations", (DE/RES-06001-6).
Part 7: "Security".
Part 8: "Management services", (DE/RES-06001-8).
Part 9: "Performance objectives", (DE/RES-06001-9).
Part 10: "Supplementary services stage 1".
Part 11: "Supplementary services stage 2", (DE/RES-06001-11).
Part 12: "Supplementary services stage 3", (DE/RES-06001-12).
Part 13: "SDL Model of the Air Interface", (DE/RES-06001-13).
Part 14: "PICS Proforma", (DE/RES-06001-14).
Part 15: "Inter-working - Extended Operations", (DE/RES-06001-15).
Part 16: "Gateways for Supplementary Services", (DE/RES-06001-16).
Transposition dates
Date of adoption of this ETS: 1 March 1996
Date of latest announcement of this ETS (doa): 31 July 1996
Date of latest publication of new National Standard
or endorsement of this ETS (dop/e): 31 January 1997
Date of withdrawal of any conflicting National Standard (dow): 31 January 1997

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ETS 300 392-10-20: April 1996
1 Scope
This European Telecommunication Standard (ETS) defines the stage 1 specifications of the Discreet
Listening (DL) supplementary service for the Trans-European Trunked RAdio (TETRA) as provided by
European operators. Stage 1 is an overall service description from the users point of view but does not
deal with the details of the human interface itself.
This ETS specifies the service description of the supplementary service and the procedures to be
expected with successful and unsuccessful outcomes. In addition this ETS specifies the interactions with
other TETRA supplementary services and inter-working considerations.
Charging principles are outside the scope of this ETS.
The DL supplementary service shall enable an authorized user to listen to one or more communications
between TETRA subscribers (Mobile Station (MS) or Line Station (LS)) without any indication to any user
that the communication is being monitored.
2 Normative references
This ETS incorporates, by dated or undated reference, provisions from other publications. These
normative references are cited at the appropriate places in the text and the publications are listed
hereafter. For dated references, subsequent amendments to or revisions of any of these publications
apply to this ETS only when incorporated in it by amendment or revision. For undated references the latest
edition of the publication referred to applies.
[1] CCITT Recommendation I.130 (1988): "Method for the characterization of
telecommunication services supported by an ISDN and network capabilities of
an ISDN".
[2] ITU-T Recommendation Z.100 (1993): "Specification and Description Language
(SDL)".
3 Definitions and abbreviations
3.1 Definitions
For the purposes of this ETS, the following definitions apply:
bearer service: A type of telecommunication service that provides the capability for the transmission of
signals between user-network interfaces.
Mobile Station (MS): A physical grouping that contains all of the mobile equipment that is used to obtain
TETRA services. By definition, a mobile station contains at least one Mobile Radio Stack (MRS).
monitoring party: The authorised user who requests the discreet listening.
Supplementary Service (SS): A supplementary service modifies or supplements a bearer service or a
teleservice. A supplementary service cannot be offered to a customer as a stand alone service. It should
be offered in combination with a bearer service or a teleservice.
Switching And Management Infrastructure (SwMI): All of the TETRA equipment for a Voice plus Data
(V+D) network except for subscriber terminals. The SwMI enables subscriber terminals to communicate
with each other via the SwMI.
talk group: Those TETRA users, terminals or gateways between which any communication shall be
monitored.
teleservice: A type of telecommunications service that provides the complete capability, including
terminal equipment functions, for communication between users according to agreed protocols.

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ETS 300 392-10-20: April 1996
3.2 Abbreviations
3.2.1 General abbreviations
For the purposes of this ETS, the following general abbreviations apply:
GTSI Group TETRA Subscriber Identity
ISDN Integrated Services Digital Network
ITSI Individual TETRA Subscriber Identity
LS Line Station
MS Mobile Station
MRS Mobile radio Stack
DL (Functional) Specification and Description Language
SS Supplementary Service
NOTE: The abbreviation SS is only used when referring to a specific supplementary service.
SwMI Switching and Management Infrastructure
TETRA Trans-European Trunked RAdio
3.2.2 Supplementary service abbreviations
For the purposes of this ETS, the following supplementary service abbreviations apply:
...