ETSI ETS 300 139 ed.1 (1992-03)

Integrated Services Digital Network (ISDN); Call Hold (HOLD) supplementary service; Service description

T/NA1(89)27

Digitalno omrežje z integriranimi storitvami (ISDN) – Dopolnilna storitev: zadržanje klica (HOLD) – Opis storitve

General Information

• Status: Published
• Publication Date: 30-Mar-1992
• Technical Committee: NA 1 - User Interfaces, Services and Charging
• Current Stage: 12 - Completion
• Due Date: 08-Nov-1991
• Completion Date: 31-Mar-1992
• Ref Project: SIST ETS 300 139 E1:2003 - Integrated Services Digital Network (ISDN); Call Hold (HOLD) supplementary service; Service description

Standards Content (Sample)

SLOVENSKI STANDARD
SIST ETS 300 139 E1:2003
01-december-2003
Digitalno omrežje z integriranimi storitvami (ISDN) – Dopolnilna storitev: zadržanje
klica (HOLD) – Opis storitve
Integrated Services Digital Network (ISDN); Call Hold (HOLD) supplementary service;
Service description
Ta slovenski standard je istoveten z: ETS 300 139 Edition 1
ICS:
33.080 Digitalno omrežje z Integrated Services Digital
integriranimi storitvami Network (ISDN)
(ISDN)
SIST ETS 300 139 E1:2003 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST ETS 300 139 E1:2003

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SIST ETS 300 139 E1:2003
EUROPEAN ETS 300 139
TELECOMMUNICATION March 1992
STANDARD
Source: ETSI TC-NA Reference: T/NA1(89)27
ICS: 33.080
ISDN, supplementary service
Key words:
Integrated Services Digital Network (ISDN);
Call Hold (HOLD) supplementary service
Service description
ETSI
European Telecommunications Standards Institute
ETSI Secretariat
F-06921 Sophia Antipolis CEDEX - FRANCE
Postal address:
650 Route des Lucioles - Sophia Antipolis - Valbonne - FRANCE
Office address:
c=fr, a=atlas, p=etsi, s=secretariat - [e-mail]
X.400: Internet:
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 1992. All rights reserved.
New presentation - see History box

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ETS 300 139: March 1992
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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Contents
Foreword .5
1 Scope .7
2 Normative references.7
3 Definitions.8
4 Symbols and abbreviations .8
5 Description .8
6 Procedures.9
6.1 Provision and withdrawal .9
6.2 Normal procedures .9
6.2.1 Activation, deactivation and registration.9
6.2.2 Erasure.9
6.2.3 Invocation and operation .9
6.2.3.1 Hold request .9
6.2.3.2 Retrieve request .10
6.2.3.3 Reservation processing .10
6.2.4 Interrogation .10
6.3 Exceptional procedures .10
6.3.1 Activation, deactivation and registration.10
6.3.2 Erasure.11
6.3.3 Invocation and operation .11
6.3.3.1 Hold request .11
6.3.3.2 Retrieve request .11
6.3.4 Interrogation .11
7 Intercommunication considerations.11
7.1 Interworking with non-ISDNs .11
7.2 Interworking with private ISDNs.11
8 Interaction with other supplementary services .11
8.1 Advice of charge services.11
8.1.1 Charging information at call set-up time.11
8.1.2 Charging information during the call.11
8.1.3 Charging information at the end of the call.11
8.2 Call waiting.12
8.3 Call hold .12
8.4 Call transfer services .12
8.4.1 Explicit call transfer .12
8.4.2 Single-step call transfer.12
8.5 Number identification services.12
8.5.1 Calling line identification presentation .12
8.5.2 Calling line identification restriction .12
8.5.3 Connected line identification presentation.12
8.5.4 Connected line identification restriction.12
8.6 Closed user group.13
8.7 Completion of calls to busy subscribers .13
8.8 Conference services .13
8.8.1 Conference call, add-on .13
8.8.2 Meet-me conference .13
8.9 Direct dialling in.13
8.10 Diversion services.13

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8.10.1 Call forwarding unconditional. 13
8.10.2 Call forwarding busy . 13
8.10.3 Call forwarding no reply . 13
8.10.4 Call deflection . 13
8.11 Freephone. 13
8.12 Malicious call identification. 14
8.13 Multiple subscriber number . 14
8.14 Sub-addressing . 14
8.15 Terminal portability. 14
8.16 Three party service. 14
8.17 User-to-user signalling . 14
Annex A (Informative): Management of active and held calls . 15
A.1 Introduction. 15
A.2 Functionality available to the served user controlling more than one call. 15
History. 16

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ETS 300 139: March 1992
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 [1], the following three level structure is used to
describe the supplementary telecommunications services as provided by European public
telecommunications operators under the pan-European Integrated Services Digital Network (ISDN):
- Stage 1: is an overall service description, from the user's stand-point;
- 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.
This standard details the stage 1 aspects (overall service description) for the Call Hold (HOLD)
supplementary service. The stage 2 and stage 3 aspects are detailed in ETS 300 140 (1992) and
ETS 300 141 (1992), respectively.

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1 Scope
This standard defines the stage one of the Call Hold (HOLD) supplementary service for the pan-European
Integrated Services Digital Network (ISDN) as provided by European public telecommunications
operators. Stage one is an overall service description from the user's point of view (see CCITT
Recommendation I.130 [1]), but does not deal with the details of the human interface itself.
This standard defines the interworking requirements of private ISDNs with the public ISDN.
In addition this standard specifies the base functionality where the service is provided to the user via a
private ISDN.
This standard does not specify the additional requirements where the service is provided to the user via a
telecommunications network that is not an ISDN but does include interworking requirements of other
networks with the public ISDN.
Interactions with supplementary services not listed in Clause 8 are outside the scope of this standard.
Charging principles are outside the scope of this standard.
The HOLD supplementary service allows a user to interrupt communications on an existing call and then
subsequently, if desired, re-establish communications.
Use of the HOLD supplementary service to hold calls by terminals simultaneously using more than one B-
channel is outside the scope of this standard.
The HOLD supplementary service is applicable to all circuit mode basic telecommunications services.
Although it may not be meaningful for some services, the network will not restrict its applicability.
This standard is applicable to the stage two and stage three standards for the ISDN HOLD supplementary
service. The terms "stage two" and "stage three" are also defined in CCITT Recommendation I.130 [1].
Where the text indicates the status of a requirement, (i.e. as strict command or prohibition, as
authorisation leaving freedom, as a capability or possibility), this shall be reflected in the text of the
relevant stage two and stage three standards.
Furthermore, conformance to this standard is met by conforming to the stage three standards with the
field of application appropriate to the equipment being implemented. Therefore no method of testing is
provided for this standard.
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 characterisation of
telecommunication services supported by an ISDN and network capabilities of
an ISDN".
[2] CCITT Recommendation I.112 (1988): "Vocabulary of terms for ISDNs".
[3] CCITT Recommendation I.210 (1988): Principles of telecommunication services
supported by an ISDN and the means used to describe them".
[4] CCITT Recommendation Q.9 (1988): "Vocabulary of switching and signalling
terms".

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3 Definitions
For the purposes of this standard, the following definitions apply:
Integrated Services Digital Network (ISDN): see CCITT Recommendation I.112 [2], § 2.3, definition
308.
(Basic) service; telecommunications service: see CCITT Recommendation I.112 [2], § 2.2, definition
201.
Supplementary service: see CCITT Recommendation I.210 [3], § 2.4.
Served user: the user who places a call on hold.
Basic access: see CCITT Recommendation Q.9 [4], § 1, definition 1551.
Primary rate access: see CCITT Recommendation Q.9 [4], § 1, definition 1552.
4 Symbols and abbreviations
HOLD Call Hold
ISDN Integrated Services Digital Network
PSTN Public Switc
...