ETSI ETS 300 787 ed.1 (1997-07)

SLOVENSKI STANDARD
SIST ETS 300 787:2001
01-september-2001
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Digital Enhanced Cordless Telecommunications (DECT); Global System for Mobile
communications (GSM); Integrated Services Digital Network (ISDN); DECT access to
GSM via ISDN; General description of service requirements
Ta slovenski standard je istoveten z: ETS 300 787 Edition 1
ICS:
33.070.30 'LJLWDOQHL]EROMãDQH Digital Enhanced Cordless
EUH]YUYLþQHWHOHNRPXQLNDFLMH Telecommunications (DECT)
'(&7
33.070.50 Globalni sistem za mobilno Global System for Mobile
telekomunikacijo (GSM) Communication (GSM)
33.080 Digitalno omrežje z Integrated Services Digital
integriranimi storitvami Network (ISDN)
(ISDN)
SIST ETS 300 787:2001 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST ETS 300 787:2001

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SIST ETS 300 787:2001
EUROPEAN ETS 300 787
TELECOMMUNICATION July 1997
STANDARD
Source: EP DECT Reference: DE/DECT-010063
ICS: 33.020
Key words: CTM, DECT, GSM, ISDN, mobility, radio, service, stage 1
Digital Enhanced Cordless Telecommunications (DECT);
Global System for Mobile communications (GSM);
Integrated Services Digital Network (ISDN);
DECT access to GSM via ISDN;
General description of service requirements
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: secretariat@etsi.fr
Tel.: +33 4 92 94 42 00 - Fax: +33 4 93 65 47 16
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 300 787: July 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 300 787: July 1997
Contents
Foreword .5
1 Scope .7
2 Normative references.8
3 Definitions and abbreviations .9
3.1 Definitions .9
3.2 Abbreviations .10
4 Description .10
4.1 General .10
4.2 DECT access network attachment to GSM PLMN .11
4.3 Interworking model .12
5 Core features.13
5.1 Outgoing call.13
5.2 Emergency call .13
5.3 Incoming call.13
5.4 Location handling.13
5.5 Handover .14
5.6 Security features.14
5.7 Identity feature .14
6 Interworking requirements.14
6.1 Interworking between DECT access network and GSM service provider .14
6.2 Interworking between DECT access network and GSM PLMN.15
History.16

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Foreword
This European Telecommunication Standard (ETS) has been produced by the Digital Enhanced Cordless
Telecommunications (DECT) Project of the European Telecommunications Standards Institute (ETSI).
Transposition dates
Date of adoption: 20 June 1997
Date of latest announcement of this ETS (doa): 31 October 1997
Date of latest publication of new National Standard
or endorsement of this ETS (dop/e): 30 April 1998
Date of withdrawal of any conflicting National Standard (dow): 30 April 1998

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1 Scope
General
This European Telecommunication Standard (ETS) defines the general requirements needed for the
provisioning of Global System for Mobile communications (GSM) basic services via the Digital Enhanced
Cordless Telecommunications (DECT) air interface for the case that the DECT network elements are
interconnected with the GSM Public Land Mobile Networks (PLMNs) via Integrated Services Digital
Network (ISDN) interfaces.
To enable DECT terminals to interwork with DECT systems which are connected to the GSM
infrastructure via ISDN interfaces, this ETS specifies the requirements on the network that derive from the
fact that an ISDN interface is used rather than the standard A-interface. This ETS is based on the
DECT/GSM interworking profile specifications ETS 300 466 [1] and ETS 300 370 [2] and on the DECT
and ISDN interworking for end system configuration ETS 300 434 [3].
NOTE 1: Interconnection of GSM PLMN and DECT access network elements via interfaces
other than the ISDN interface (e.g. the A-interface) is outside the scope of this ETS.
This ETS and the corresponding stage 2 standard specify the requirements for:
- the protocols for mobility management functions across the ISDN interface; and
- the DECT access network interworking/mappings for mobility management functions across the
ISDN interface; and
- the additions to the ISDN protocols for the support of basic telephony services as specified in
ETS 300 403-1 [4].
The DECT access network interworking/mappings for DECT and ISDN interworking are specified in
ETS 300 434 [3].
The DECT access protocols and Portable Part (PP) interworking/mappings necessary for the support of
basic telephony services are specified in ETS 300 370 [2] and ETS 300 444 [5].
Interaction with services/supplementary services are outside the scope of this ETS.
Handover among DECT cells and GSM cells as well as handover among DECT cells connected to
different DECT access networks, which are individually linked to a Mobile Switching Centre (MSC), is
outside the scope of this ETS.
Definition and applicability
This ETS describes how users with DECT PPs are enabled to access to GSM services and to make calls
from and to receive calls at any location where:
a) DECT radio coverage is provided; and
b) access is allowed to the user.
The application of an ISDN interface between GSM PLMN and DECT access network elements as
opposed to the A-interface introduces the capability for GSM service providers to offer their services by
making use of the DECT radio equipment of existing DECT access networks having implemented ISDN
interfaces.
NOTE 2: The DECT access network can be owned by the GSM service provider but it could
also be a Private Automatic Branch Exchange (PABX) or private network providing
transparent access to GSM.
Provided this, the GSM user accesses his/her telecommunication services in any DECT radio covered
location where access is allowed. The DECT/GSM network keeps track of the terminals location
throughout the entire network.

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Furthermore, conformance to this ETS is met by conforming to the stage 3 standards 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 and 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] ETS 300 466: "Digital European Cordless Telecommunications/Global System
for Mobile Communications (DECT/GSM) interworking profile; General
description of service requirements; Functional capabilities and information
flows".
[2] ETS 300 370: "Digital Enhanced Cordless Telecommunications / Global System
for Mobile communications (DECT/GSM) inter-working profile; Access and
mapping (Protocol/procedure description for 3,1 kHz speech service)".
[3] ETS 300 434: "Digital Enhanced Cordless Telecommunications (DECT) and
Integrated Services Digital Network (ISDN) interworking for end system
configuration".
[4] ETS 300 403-1: "Integrated Services Digital Network (ISDN); Digital Subscriber
Signalling System No. one (DSS1) protocol; Signalling network layer for circuit-
mode basic call control; Part 1: Protocol specification [ITU-T Recommendation
Q.931 (1993), modified]".
[5] ETS 300 444: "Digital European Cordless Telecommunications (DECT); Generic
Access Profile (GAP)".
[6] ETS 300 175-6: "Digital Enhanced Cordless Telecommunications (DECT);
Common Interface (CI); Part 6: Identities and addressing".
[7] ETS 300 511: "European digital cellular telecommunications system (Phase 2);
Man-Machine Interface (MMI) of the Mobile Station (MS) (GSM 02.30)".
[8] ETS 300 530: "European digital cellular telecommunications system (Phase 2);
Location registration procedures (GSM 03.12)".
[9] ETS 300 506: "European digital cellular telecommunications system (Phase 2);
Security aspects (GSM 02.09)".
[10] ETS 300 534: "Digital cellular telecommunications system (Phase 2); Security
related network functions (GSM 03.20)".

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3 Definitions and abbreviations
3.1 Definitions
For the purposes of this ETS, the following definitions apply:
DECT access network: Physical entity that contains all of the elements of a DECT Fixed Part (FP) and
that is attached to a GSM MSC.
NOTE 1: A DECT access network provides a transparent access to the services of the GSM
PLMN. This does however not exclude that it may in addition provide services and
switching capabilities to its own users.
DECT Fixed Part (FP): A physical grouping that contains all of the elements in the DECT network
between the local network and the DECT air interface.
NOTE 2: A DECT FP contains the logical elements of at least one fixed radio termination, plus
additional implementation specific elements.
DECT location area: The domain in which a DECT PP may receive and/or make calls as a result of a
single location registration in the DECT access network.
GSM location area: The domain in which a DECT PP may receive and/or make calls as a result of a
single location updating in the GSM network.
NOTE 3: A GSM location area may cover more than one DECT location area.
GSM service provider: An administration which offers global mobile telecommunication services to its
subscribers.
GSM services: Services which are offered to the subscriber/user by a GSM Service Provider and which
are defined by the appropriate GSM specifications.
location area: The domain in which a DECT PP may receive and/or make calls as a result of a single
location registration/upda
...