SIST EN 300 392-10-12 V1.3.1:2006

• Abstract:

  The present document defines the stage 1 description of the call hold supplementary service (SS-HOLD) for the Terrestrial Trunked RAdio (TETRA) as provided by European operators. The stage 1 description is an overall service description from the user point of view but does not deal with the details of the human interface itself (see ITU-T Recommendation I.130 [1]). SS-HOLD enables a user to interrupt communication on an existing individual call and then subsequently, if desired, re-establish communication. The present document specifies the service description of the supplementary service and the procedures to be expected with successful and unsuccessful outcomes. In addition the present document specifies the interactions with other TETRA supplementary services and Interworking considerations. Charging principles are outside the scope of the present document.

• Status: Published
• Publication Date: 31-Mar-2006
• 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-Apr-2006
• Due Date: 01-Apr-2006
• Completion Date: 01-Apr-2006
• Ref Project: ETSI EN 300 392-10-12 V1.3.1 (2004-02) - Terrestrial Trunked Radio (TETRA); Voice plus Data (V+D); Part 10: Supplementary services stage 1; Sub-part 12: Call Hold (HOLD)

SIST EN 300 392-10-12 V1.3.1:2006 is the Slovenian adoption of the ETSI European Standard for Terrestrial Trunked Radio (TETRA) Voice plus Data (V+D) Call Hold. It gives the stage 1 service description of SS-HOLD from the user point of view, for European operators and users of TETRA individual calls. The standard specifies how a call can be put on hold and later retrieved, including success and failure cases, service interactions, and interworking behavior.

What does SIST EN 300 392-10-12 V1.3.1:2006 specify?

SIST EN 300 392-10-12 V1.3.1:2006 specifies the stage 1 description of the call hold supplementary service (SS-HOLD) for TETRA. It focuses on the service seen by the user, not on the detailed human interface, and it excludes charging principles.

The document is organized into four main clauses plus two informative annexes:

• Clause 1 - Scope
• Clause 2 - References
• Clause 3 - Definitions and abbreviations
• Clause 4 - SS-HOLD stage 1 specification, including description, procedures, interactions, interworking considerations, and overall SDL

Annex	What it covers
Annex A	Bibliography
Annex B	Change Requests

In practice, this structure means the document first sets the context, then defines the service behavior, then shows how SS-HOLD interacts with other TETRA supplementary services and with other networks.

What are the key requirements of SIST EN 300 392-10-12 V1.3.1:2006?

SIST EN 300 392-10-12 V1.3.1:2006 defines the service rules for putting an individual TETRA call on hold and later retrieving it. The most important requirements are in clause 4, where the standard describes provision, invocation, retrieval, failures, and interactions with other services.

Service provision and availability

Clause 4.2.1 says SS-HOLD may be provided to all individual subscribers or to each subscriber separately. A service provider may withdraw it for administrative reasons or at the served user’s request when it is individually provided. For a buyer or operator, this means SS-HOLD can be a network-wide feature or an individually subscribed feature.

Activation, interrogation, and user feedback

Clause 4.2.2.1 covers activation, deactivation, and interrogation. Interrogation can tell the served user how many calls are on hold and which calls are currently held. In practice, this supports user awareness and service management, especially for terminals that need to show held-call status.

Putting a call on hold

Clause 4.2.2.2.1 says the served user can invoke SS-HOLD after an individual call is established. If accepted by the network, the call is interrupted and both the served user and the affected user are notified. The standard also allows a user to hold more than one individual call, with the maximum number being a network option, so network configuration affects how many simultaneous held calls a subscriber can manage.

Retrieving a held call

Clause 4.2.2.2.2 states that after successful hold, the served user remains in the basic call state “call active.” The served user may then retrieve a held call, start a new call, or connect to another incoming call such as a waiting call. If resources are available, the network re-establishes the call and acknowledges success; if not, it rejects the request and indicates whether the call is still retrievable later. That matters because retrieval may depend on radio resources, location, and network congestion.

Failure cases and location change

Clause 4.2.3 describes exceptional procedures. A hold request fails if SS-HOLD is not subscribed or if the user has already reached the maximum number of held calls. Clause 4.2.3.3.4 adds a location-change case: if the network does not support the SS-HOLD location procedure, it informs the served user that restoration of the held call is not supported and clears the call with the corresponding cause. For field use, this is important when a user moves between cells or networks before retrieving the call.

Interactions with other supplementary services

Clause 4.3 states how SS-HOLD relates to other TETRA supplementary services. In many cases there is no interaction, but the standard makes several practical points: talking party identification stops while the call is on hold; call waiting and call forwarding may still apply because the users are treated as busy; include call removes the hold state; and pre-emptive priority may clear a held call. This helps implementers avoid conflicting service behavior.

Interworking and signaling

Clause 4.4 covers interworking between TETRA networks and with external networks. Notifications about hold and retrieval must pass to the affected user in another TETRA network, and gateways relay hold/retrieval notifications for individual calls when the external network supports call hold. Clause 4.5 then gives the overall behavior in Specification and Description Language (SDL), including one process for invocation and operation and one for interrogation.

What terms does SIST EN 300 392-10-12 V1.3.1:2006 define?

The standard uses a small set of key terms that matter for understanding who controls the call and who is notified.

• SS-HOLD - The call hold supplementary service that lets a user interrupt an individual call and later retrieve it.
• Served user - The user who may invoke SS-HOLD and request that a call be put on hold.
• Affected user - The other party in the individual call after SS-HOLD has been invoked by one party.
• MS - Mobile Station, used in the location-change and call-control behavior.
• SDL - Functional Specification and Description Language, used for the overall dynamic behavior diagrams.
• SS - Supplementary Service, used when referring to a specific supplementary service.
• ISDN - Integrated Services Digital Network, used in a referenced service-characterization recommendation.

Who uses SIST EN 300 392-10-12 V1.3.1:2006?

SIST EN 300 392-10-12 V1.3.1:2006 is used by TETRA network operators, service providers, terminal designers, and testers who need a common definition of call hold behavior. It is also relevant to quality managers and buyers who need to check whether a TETRA system supports call hold, hold retrieval, interrogation, and the stated interworking cases.

Because the standard is stage 1, it is especially useful for service definition, user-feature analysis, terminal behavior review, and acceptance planning before lower-level protocol and conformance work.

What changed in SIST EN 300 392-10-12 V1.3.1:2006 from the previous edition?

The document history shows earlier publications as ETS 300 392-10-12 Edition 1 and Edition 2, followed by V1.3.0 and then V1.3.1. Annex B records Change Request 001 for Edition 2, covering the foreword and clauses 4.2.2.1, 4.2.3.1, 4.3.8, 4.3.9, 4.3.13, 4.3.19, 4.3.22, and 4.3.27, with clarified interactions and editorial changes.

Which standards are used with SIST EN 300 392-10-12 V1.3.1:2006?

The standard cites four referenced documents:

• ITU-T Recommendation I.130 - service characterization for telecommunications supported by an ISDN; it frames the stage 1 service description approach.
• ITU-T Recommendation Z.100 - Specification and Description Language (SDL); it supports the SDL behavior models in clause 4.5.
• ETSI EN 300 392-2 - TETRA Voice plus Data Air Interface; it is referenced for call-control primitives such as TNCC-RELEASE.
• ETSI EN 300 392-9 - General requirements for supplementary services; it supplies the common definitions used throughout the SS-HOLD specification.

The foreword also places this document within the TETRA V+D family alongside stage 1, stage 2, and stage 3 supplementary-service parts.

What does the SIST EN 300 392-10-12 V1.3.1:2006 document contain?

The document contains the stage 1 service description, not a protocol specification. It describes the general user-facing behavior of SS-HOLD, including when a call can be held, how a held call can be retrieved, and how the network reports success or failure.

It also contains:

• procedures for provision, withdrawal, activation, deactivation, interrogation, invocation, and retrieval
• exceptional cases such as unsupported interrogation, subscription failure, maximum-held-call limits, and location change
• interactions with a long list of TETRA supplementary services
• interworking rules for other TETRA networks and external networks
• two SDL figures that show invocation/operation and interrogation behavior
• an informative bibliography and an informative table of change requests

SLOVENSKI STANDARD
01-april-2006
Prizemni snopovni radio (TETRA) – Govor in podatki (V+D) – 10. del: Dopolnilne
storitve stopnje 1 – 12. poddel: Zadržanje klica (HOLD)
Terrestrial Trunked Radio (TETRA); Voice plus Data (V+D); Part 10: Supplementary
services stage 1; Sub-part 12: Call Hold (HOLD)
Ta slovenski standard je istoveten z: EN 300 392-10-12 Version 1.3.1
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 Standard (Telecommunications series)

Terrestrial Trunked Radio (TETRA);
Voice plus Data (V+D);
Part 10: Supplementary services stage 1;
Sub-part 12: Call Hold (HOLD)
2 ETSI EN 300 392-10-12 V1.3.1 (2004-02)

Reference
REN/TETRA-03125
Keywords
data, hold, radio, speech, stage 1, supplementary
service, TETRA, V+D
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3 ETSI EN 300 392-10-12 V1.3.1 (2004-02)
Contents
Intellectual Property Rights.5
Foreword.5
1 Scope.7
2 References.7
3 Definitions and abbreviations.7
3.1 Definitions.7
3.2 Abbreviations.8
4 SS-HOLD stage 1 specification .8
4.1 Description.8
4.1.1 General description.8
4.1.2 Qualifications on applicability to telecommunication services.8
4.2 Procedures.8
4.2.1 Provision/withdrawal.8
4.2.2 Normal procedures.8
4.2.2.1 Activation/deactivation, interrogation.8
4.2.2.1.1 Activation/deactivation.8
4.2.2.1.2 Interrogation.9
4.2.2.2 Invocation and operation.9
4.2.2.2.1 Hold request.9
4.2.2.2.2 Follow-up.9
4.2.3 Exceptional procedures.10
4.2.3.1 Activation/deactivation, interrogation.10
4.2.3.1.1 Activation/deactivation.10
4.2.3.1.2 Interrogation.10
4.2.3.2 Invocation.10
4.2.3.3 Operation.10
4.2.3.3.1 Call on hold cleared by the served user .10
4.2.3.3.2 Call cleared by the network .10
4.2.3.3.3 Call on hold cleared by the affected user.10
4.2.3.3.4 Location change.11
4.3 Interactions with other supplementary services.11
4.3.1 Calling line identification presentation .11
4.3.2 Connected line identification presentation.11
4.3.3 Calling/connected line identification restriction .11
4.3.4 Call report.11
4.3.5 Talking party identification.11
4.3.6 Call forwarding unconditional .11
4.3.7 Call forwarding on busy .11
4.3.8 Call forwarding on no reply.11
4.3.9 Call forwarding on not reachable.12
4.3.10 List search call .12
4.3.11 Call authorized by dispatcher.12
4.3.12 Short number addressing .12
4.3.13 Area selection.12
4.3.14 Access priority call .12
4.3.15 Priority call.12
4.3.16 Call waiting.12
4.3.17 Call completion to busy subscriber.13
4.3.18 Late entry.13
4.3.19 Void.13
4.3.20 Pre-emptive priority call .13
4.3.21 Include call.13
4.3.22 Void.13
4.3.23 Barring of outgoing calls .13
ETSI
4 ETSI EN 300 392-10-12 V1.3.1 (2004-02)
4.3.24 Barring of incoming calls .13
4.3.25 Discreet listening.14
4.3.26 Ambience listening.14
4.3.27 Dynamic group number assignment .14
4.3.28 Call completion on no reply.14
4.3.29 Call retention.14
4.4 Interworking considerations.15
4.4.1 Interworking between different TETRA networks .15
4.4.2 Interworking with external networks .15
4.5 Overall SDL.15
Annex A (informative): Bibliography.19
Annex B (informative): Change Requests .20
History .21

ETSI
5 ETSI EN 300 392-10-12 V1.3.1 (2004-02)
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 ETSI SR 000 314: "Intellectual Property Rights (IPRs); Essential, or potentially Essential, IPRs notified to ETSI in
respect of ETSI standards", which is available from the ETSI Secretariat. Latest updates are available on the ETSI Web
server (http://webapp.etsi.org/IPR/home.asp).
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 ETSI 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 Project Terrestrial Trunked Radio
(TETRA).
The present document is part 10, sub-part 12 of a multi-part deliverable covering Voice plus Data (V+D), as identified
below:
EN 300 392-1: "General network design";
EN 300 392-2: "Air Interface (AI)";
EN 300 392-3: "Interworking at the Inter-System Interface (ISI)";
ETS 300 392-4: "Gateways basic operation";
EN 300 392-5: "Peripheral Equipment Interface (PEI)";
EN 300 392-7: "Security";
EN 300 392-9: "General requirements for supplementary services";
EN 300 392-10: "Supplementary services stage 1";
EN 300 392-10-1: "Call Identification (CI)";
ETS 300 392-10-2: "Call report";
ETS 300 392-10-3: "Talking Party Identification (TPI)";
EN 300 392-10-4: "Call Forwarding (CF)";
ETS 300 392-10-5: "List Search Call (LSC)";
EN 300 392-10-6: "Call Authorized by Dispatcher (CAD)";
ETS 300 392-10-7: "Short number addressing";
EN 300 392-10-8: "Area Selection (AS)";
ETS 300 392-10-9: "Access priority";
EN 300 392-10-10: "Priority Call (PC)";
EN 300 392-10-11: "Call Waiting (CW)";
EN 300 392-10-12: "Call Hold (HOLD)";
ETS 300 392-10-13: "Call completion to busy subscriber";
EN 300 392-10-14: "Late Entry (LE)";
ETSI
6 ETSI EN 300 392-10-12 V1.3.1 (2004-02)
ETS 300 392-10-15: "Transfer of control";
ETS 300 392-10-16: "Pre-emptive priority call";
EN 300 392-10-17: "Include Call (IC)";
EN 300 392-10-18: "Barring of Outgoing Calls (BOC)";
EN 300 392-10-19: "Barring of Incoming Calls (BIC)";
ETS 300 392-10-20: "Discreet Listening (DL)";
EN 300 392-10-21: "Ambience Listening (AL)";
EN 300 392-10-22: "Dynamic Group Number Assignment (DGNA)";
ETS 300 392-10-23: "Call completion on no reply";
ETS 300 392-10-24: "Call Retention (CRT)";
EN 300 392-11: "Supplementary services stage 2";
EN 300 392-12: "Supplementary services stage 3";
ETS 300 392-13: "SDL model of the Air Interface (AI)";
ETS 300 392-14: "Protocol Implementation Conformance Statement (PICS) proforma specification";
TS 100 392-15: "TETRA frequency bands, duplex spacings and channel numbering";
TS 100 392-16: "Network Performance Metrics";
TS 100 392-17: "TETRA V+D and DMO Release 1.1 specifications".

National transposition dates
Date of adoption of this EN: 6 February 2004
Date of latest announcement of this EN (doa): 31 May 2004
Date of latest publication of new National Standard
or endorsement of this EN (dop/e): 30 November 2004
Date of withdrawal of any conflicting National Standard (dow): 30 November 2004

ETSI
7 ETSI EN 300 392-10-12 V1.3.1 (2004-02)
1 Scope
The present document defines the stage 1 description of the call hold supplementary service (SS-HOLD) for the
Terrestrial Trunked RAdio (TETRA) as provided by European operators. The stage 1 description is an overall service
description from the user point of view but does not deal with the details of the human interface itself (see ITU-T
Recommendation I.130 [1]).
SS-HOLD enables a user to interrupt communication on an existing individual call and then subsequently, if desired,
re-establish communication.
The present document specifies the service description of the supplementary service and the procedures to be expected
with successful and unsuccessful outcomes. In addition the present document specifies the interactions with other
TETRA supplementary services and Interworking considerations.
Charging principles are outside the scope of the present document.
2 References
The following documents contain provisions which, through reference in this text, constitute provisions of the present
document.
• References are either specific (identified by date of publication and/or edition number or version number) or
non-specific.
• For a specific reference, subsequent revisions do not apply.
• For a non-specific reference, the latest version applies.
Referenced documents which are not found to be publicly available in the expected location might be found at
http://docbox.etsi.org/Reference.
[1] ITU-T Recommendation I.130: "Method for the characterization of telecommunication services
supported by an ISDN and network capabilities of an ISDN".
[2] ITU-T Recommendation Z.100: "Specification and Description Language (SDL)".
[3] ETSI EN 300 392-2: "Terrestrial Trunked Radio (TETRA); Voice plus Data (V+D); Part 2: Air
Interface (AI)".
[4] ETSI EN 300 392-9: "Terrestrial Trunked Radio (TETRA); Voice plus Data (V+D);
Part 9: General requirements for supplementary services".
3 Definitions and abbreviations
3.1 Definitions
For the purposes of the present document, the terms and definitions given in EN 300 392-9 [4], except for those of
affected user and served user, which are given below:
affected user: after SS-HOLD has been invoked by one of the two parties in an individual call, the other party in that
call
NOTE: If both parties in an individual call invoke SS-HOLD, both will be affected user for SS-HOLD invocation
by the other party.
served user: user who may invoke the supplementary service (i.e. request that a call be put on hold)
ETSI
8 ETSI EN 300 392-10-12 V1.3.1 (2004-02)
3.2 Abbreviations
For the purposes of the present document, the following abbreviations apply:
HOLD Call Hold
ISDN Integrated Services Digital Network
MS Mobile Station
SDL (Functional) Specification and Description Language
SS Supplementary Service
NOTE: The abbreviation SS is only used when referring to a specific supplementary service.
4 SS-HOLD stage 1 specification
4.1 Description
4.1.1 General description
The call hold supplementary service (SS-HOLD) enables a user to interrupt an existing individual call and then
subsequently retrieve that call (in re-establishing communication), unless it has been cleared.
4.1.2 Qualifications on applicability to telecommunication services
This supplementary service shall be applicable to all TETRA circuit mode individual teleservices and bearer services.
4.2 Procedures
4.2.1 Provision/withdrawal
The provision of SS-HOLD shall be either general for all (TETRA) individual subscribers or on a per individual
subscriber basis.
The supplementary service shall be withdrawn by the service provider:
• for administrative purposes; or
• at the request of the served user, if individually provided.
No specific information shall then be given to the subscribers by the network.
4.2.2 Normal procedures
4.2.2.1 Activation/deactivation, interrogation
4.2.2.1.1 Activation/deactivation
The service shall be activated upon provision and deactivated upon withdrawal.
ETSI
9 ETSI EN 300 392-10-12 V1.3.1 (2004-02)
4.2.2.1.2 Interrogation
The network and the served user may support the interrogation procedure, initiated by the served user to inform him
about:
• the number
...