SIST ETS 300 792:2001

SLOVENSKI STANDARD
01-september-2001
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Digital Enhanced Cordless Telecommunications (DECT); Global System for Mobile
communications (GSM); DECT/GSM Interworking Profile (IWP); Implementation of
facsimile group 3
Ta slovenski standard je istoveten z: ETS 300 792 Edition 1
ICS:
33.070.30 'LJLWDOQHL]EROMãDQH Digital Enhanced Cordless
EUH]YUYLþQHWHOHNRPXQLNDFLMH Telecommunications (DECT)
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33.070.50 Globalni sistem za mobilno Global System for Mobile
telekomunikacijo (GSM) Communication (GSM)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN ETS 300 792
TELECOMMUNICATION June 1997
STANDARD
Source: ETSI EP-DECT Reference: DE/DECT-010072
ICS: 33.020
Key words: DECT, FAX, GSM, profile
Digital Enhanced Cordless Telecommunications (DECT);
Global System for Mobile communications (GSM);
DECT/GSM Interworking Profile (IWP);
Implementation of facsimile group 3
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 300 792: June 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 300 792: June 1997
Contents
Foreword .5
Introduction.5
1 Scope .7
2 Normative references.7
3 Definitions, abbreviations and symbols.10
3.1 Definitions .10
3.2 Abbreviations .13
3.3 Symbols for status columns.14
4 General.14
5 Interworking requirements.15
5.1 General .15
5.2 Supported ITU-T Recommendation T.30 features .16
5.3 Reference configurations.16
5.4 General interworking model for FP GSM PLMN attachment.16
5.5 Service requirements.17
5.6 Interworking context.18
5.6.1 General.18
5.6.2 Basic interworking rules .18
5.6.3 Interpretation of broadcast attributes.18
5.6.4 Interpretation of terminal capability .19
6 Interworking mappings, FP attached to the GSM PLMN .19
6.1 General .19
6.2 FP C-Plane IWU procedures .19
6.2.1 Call handling IWU procedures .19
6.2.1.1 General.19
6.2.1.2 Outgoing automatic facsimile group 3 call (PP to FP).19
6.2.1.2.1 Call setup procedure (including T.30
phase A).19
6.2.1.2.2 Call release (including ITU-T
Recommendation T.30, phase E).20
6.2.1.2.3 Other call handling procedures.20
6.2.1.3 Incoming automatic facsimile group 3 call (FP to PP).20
6.2.1.3.1 Call setup procedure (including ITU-T
Recommendation T.30, phase A).20
6.2.1.3.2 Call release (including ITU-T
Recommendation T.30, phase E).20
6.2.1.3.3 Other call handling procedures.20
6.2.2 Mobility management IWU procedures.20
6.2.3 Channel mode modify procedures .21
6.2.4 CC and mobility management message mappings.21
6.2.4.1 GSM to DECT.21
6.2.4.2 DECT to GSM.21
6.3 FP U-Plane ITU-T Recommendation T.30 and MMSP IWU procedures .21
6.3.1 General.21
6.3.2 GSM automatic facsimile group 3 transparent and MMSP interworking.21
6.3.2.1 FP interworking function requirements.21
6.3.2.2 The fax adaptor and ITU-T Recommendation T.30/MMSP
mapping entity functionality.21
6.3.2.3 Flow control .22
6.3.2.4 Interchange circuit mappings.22

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ETS 300 792: June 1997
6.3.3 GSM automatic facsimile group 3 non-transparent and MMSP
interworking . 23
6.3.3.1 FP interworking function requirements . 23
6.3.3.2 The FA and ITU-T Recommendation T.30/MMSP
mapping entity functionality. 23
6.3.3.3 Flow control. 23
6.3.3.4 Interchange circuit mappings. 23
6.3.4 Supported ITU-T Recommendation T.30 procedures . 23
6.3.5 Outgoing call ITU-T Recommendation T.30 procedures (PP to FP). 24
6.3.5.1 Phase A. 24
6.3.5.2 Phase B. 24
6.3.5.3 Phase C . 24
6.3.5.4 Phase D . 24
6.3.5.5 Phase E. 24
6.3.6 Incoming call ITU-T Recommendation T.30 procedures (FP to PP). 24
6.3.6.1 Phase A. 24
6.3.6.2 Phase B. 24
6.3.6.3 Phase C . 24
6.3.6.4 Phase D . 24
6.3.6.5 Phase E. 24
6.4 PP C-Plane IWU procedures . 24
6.5 PP U-Plane IWU procedures . 25
7 Interworking connection types . 25
7.1 Connection type definitions . 25
7.1.1 General . 25
7.2 Connection type definitions . 25
7.2.1 <> coding. 25
7.2.2 <> default coding . 26
7.2.3 <> default coding . 26
7.2.4 <> default coding . 26
7.2.5 <> coding. 26
7.2.6 <> coding . 26
Annex A (informative): Procedure examples of transparent A-interface solutions. 27
Annex B (informative): Alternate speech and facsimile group 3 teleservice . 29
History. 30

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ETS 300 792: June 1997
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: 6 June 1997
Date of latest announcement of this ETS (doa): 30 September 1997
Date of latest publication of new National Standard
or endorsement of this ETS (dop/e): 31 March 1998
Date of withdrawal of any conflicting National Standard (dow): 31 March 1998
Introduction
This ETS is a part of a set of standards for the DECT/GSM Interworking Profile (IWP) concept that
includes:
- general description of service requirements, functional capabilities and information flows,
(ETS 300 466 [13]);
- access and mapping (protocol/procedure description for 3,1 kHz speech service),
(ETS 300 370 [10]);
- GSM-MSC/DECT-FP fixed interconnection (ETS 300 499 [14]);
- GSM Phase 2 supplementary services implementation (ETS 300 703 [23]);
- short message services, point to point and cell broadcast (ETS 300 764 [26]);
- implementation of bearer services (ETS 300 756 [25]);
- implementation of facsimile group 3 (this ETS).
This ETS is based on Digital Enhanced Cordless Telecommunications (DECT) Common Interface (CI)
specification ETS 300 175, parts 1 to 8 [1] to [8] to enable DECT terminals to interwork in the public and
private environment with DECT systems which are connected to a Global System for Mobile
communications (GSM) core infrastructure.
In addition, this ETS is based on the DECT Generic Access Profile (GAP), ETS 300 444 [12] to enable the
same DECT/GSM terminal to interwork with a DECT Fixed Part (FP) complying to the GAP requirements,
irrespective of whether this FP provides residential, business or public access services. General
attachment requirements and speech attachment requirements are based on TBR 6 [28] and TBR 10 [29].
Further details on the DECT system may be found in ETR 015 [30], ETR 043 [31], ETR 056 [32], and in
ETS 300 176 [9].
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1 Scope
This European Telecommunication Standard (ETS) is a part of the Digital Enhanced Cordless
Telecommunications / Global System for Mobile communications (DECT/GSM) Interworking Profile (IWP)
and specifies the Portable Part (PP) interworking requirements and Fixed Part (FP) interworking
requirements/mappings necessary to ensure that the GSM facsimile group 3 service can be provided over
DECT, as specified in ETS 300 466 [13]. To enable DECT terminals to interwork with DECT systems
which are connected to the GSM infrastructure, from the DECT side this ETS is based on
ETS 300 755 [24].
NOTE: The DECT data service profile is based upon the Generic Access Profile (GAP)
ETS 300 444 [12] and on the DECT Common Interface specification ETS 300 175,
parts 1 to 8 [1] to [8].
Interworking functions/mappings are specified for Mobile Switching Centre (MSC) attachment for the
DECT FP as the FP is using the A-interface towards the GSM MSC in the respect that the FP emulates a
GSM Base Station Controller (BSC) with regards to the GSM messages which are relevant to this ETS.
The complete interface used between the DECT Fixed Part (FP) and the GSM Mobile Switching Centre
(MSC) is specified in ETS 300 499 [14]. Attachment via other interfaces to GSM-networks is outside the
scope of this ETS.
The DECT access protocols and FP and PP interworking/mappings necessary for the support of basic
voice telephony service are specified in ETS 300 370 [10]. Support of bearer services is specified in
ETS 300 756 [25].
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] ETS 300 175-1: "Digital Enhanced Cordless Telecommunications (DECT);
Common Interface (CI); Part 1: Overview".
[2] ETS 300 175-2: "Digital Enhanced Cordless Telecommunications (DECT);
Common Interface (CI); Part 2: Physical layer (PHL)".
[3] ETS 300 175-3: "Digital Enhanced Cordless Telecommunications (DECT);
Common Interface (CI); Part 3: Medium Access Control (MAC) layer".
[4] ETS 300 175-4: "Digital Enhanced Cordless Telecommunications (DECT);
Common Interface (CI); Part 4: Data Link Control (DLC) layer".
[5] ETS 300 175-5: "Digital Enhanced Cordless Telecommunications (DECT);
Common Interface (CI); Part 5: Network (NWK) layer".
[6] ETS 300 175-6: "Digital Enhanced Cordless Telecommunications (DECT);
Common Interface (CI); Part 6: Identities and addressing".
[7] ETS 300 175-7: "Digital Enhanced Cordless Telecommunications (DECT);
Common Interface (CI); Part 7: Security features".
[8] ETS 300 175-8: "Digital Enhanced Cordless Telecommunications (DECT);
Common Interface (CI); Part 8: Speech coding and transmission".
[9] ETS 300 176: "Digital Enhanced Cordless Telecommunications (DECT);
Approval test specification".
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ETS 300 792: June 1997
[10] 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)".
[11] ETS 300 435: "Digital European Cordless Telecommunications (DECT); Data
Services Profile (DSP); Base standard including interworking to connectionless
networks (service types A and B, Class 1)".
[12] ETS 300 444: "Digital European Cordless Telecommunications (DECT); Generic
Access Profile (GAP)".
[13] 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".
[14] ETS 300 499: "Digital Enhanced Cordless Telecommunications / Global System
for Mobile Communications (DECT/GSM) interworking profile; Mobile services
Switching Centre (MSC) - Fixed Part (FP) interconnection".
[15] ETS 300 538: "European digital cellular telecommunications system (Phase 2);
Technical realization of facsimile group 3 transparent (GSM 03.45)".
[16] ETS 300 539: "European digital cellular communications system (Phase 2);
Technical realization of facsimilé group 3 non-transparent (GSM 03.46)".
[17] ETS 300 557: "Digital cellular telecommunications system (Phase 2); Mobile radio
interface layer 3 specification (GSM 04.08)".
[18] ETS 300 562: "European digital cellular telecommunications system (Phase 2);
Rate adaption on the Mobile Station - Base Station System (MS - BSS) Interface
(GSM 04.21)".
[19] ETS 300 563: "European digital cellular telecommunications system (Phase 2);
Radio Link Protocol (RLP) for data and telematic services on the Mobile Station
- Base Station System (MS - BSS) interface and the Base Station System -
Mobile-services Switching Centre (BSS - MSC) interface (GSM 04.22)".
[20] ETS 300 584: "European digital cellular telecommunications system (Phase 2);
Terminal Adaptation Functions (TAF) for services using synchronous bearer
capabilities (GSM 07.03)".
[21] ETS 300 590: "Digital cellular telecommunications system (Phase 2); Mobile-
services Switching Centre - Base Station System (MSC - BSS) interface; Layer
3 specification (GSM 08.08)".
[22] ETS 300 651: "Digital Enhanced Cordless Telecommunications (DECT); Data
Services Profile (DSP); Generic data link service; Service type C, class 2".
[23] ETS 300 703: "Digital Enhanced Cordless Telecommunications / Global System
for Mobile communications (DECT/GSM) Inter-Working Profile (IWP); GSM
phase 2 supplementary services implementation".
[24] ETS 300 755: "Digital Enhanced Cordless Telecommunications (DECT); Data
services profile; Multimedia Messaging Service (MMS) with specific provision for
facsimile services; (Service type F, class 2)".
[25] ETS 300 756: "Digital Enhanced Cordless Telecommunications / Global System
for Mobile communications (DECT/GSM) interworking profile; Implementation of
bearer services".
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ETS 300 792: June 1997
[26] ETS 300 764: "Digital Enhanced Cordless Telecommunications / Global System
for Mobile communications (DECT/GSM) Interworking Profile (IWP);
Implementation of short message service, point-to-point and cell broadcast".
[27] EN 301 238: "Digital Enhanced Cordless telecommunications (DECT); Data
Service Profile (DSP); Isochronous data bearer services with mobility (service
type D, mobility class 2)".
[28] TBR 6: "Digital Enhanced Cordless Telecommunications (DECT); General
terminal attachment requirements".
[29] TBR 10: "Digital Enhanced Cordless Telecommunications (DECT); General
terminal attachment requirements; Telephony applications".
[30] ETR 015: "Radio Equipment and Systems; Digital European Cordless
Telecommunications (DECT); Reference document".
[31] ETR 043: "Digital European Cordless Telecommunications (DECT); Common
interface; Services and facilities requirements specification".
[32] ETR 056: "Digital European Cordless Telecommunications (DECT); System
description document".
[33] ETR 100: "European digital cellular telecommunications system (Phase 2);
Abbreviations and acronyms (GSM 01.04)".
[34] DEN/DECT-020087: "Digital Enhanced Cordless Telecommunications (DECT);
Dynamic Multimedia Service Change on the DECT access interface".
[35] ISO/IEC 9646-6: "Information technology - Open Systems Interconnection -
Conformance testing methodology and framework - Part 6: Protocol profile test
specification".
[36] ITU-T Recommendation Q.6xx series: "Interworking of signalling systems".
[37] ITU-T Recommendation T.4: "Standardization of Group 3 facsimile apparatus
for document transmission".
[38] ITU-T Recommendation T.30: "Procedures for document facsimile transmission
in the general switched telephone network".
[39] ITU-T Recommendation T.31 (1995): "Asynchronous facsimile DCE control -
Service Class 1".
[40] ITU-T Recommendation T.32 (1995): "Asynchronous facsimile DCE control -
Service Class 2".
[41] CCITT Recommendation V.24 (1988): "List of definitions for interchange circuits
between data terminal equipment (DTE) and data circuit-terminating equipment
(DCE)".
[42] CCITT Recommendation V.25bis (1988): "Automatic calling and/or answering
equipment on the general switched telephone network (GSTN) using the
100-series interchange circuits".
[43] CCITT Recommendation V.110: "Support of data terminal equipments with
V-Series type interfaces by an integrated services digital network".

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3 Definitions, abbreviations and symbols
3.1 Definitions
GSM-specific definitions may be found in ETR 100 [33]. In addition, for the purposes of this ETS, the
following definitions apply:
attach: The process whereby a PP within the coverage area of a FP to which it has access rights, notifies
this FP that it is operative. The reverse process is detach, which reports the PP as inoperative.
NOTE 1: An operative PP is assumed to be ready to receive calls.
authentication: The process whereby a DECT subscriber is positively verified to be a legitimate user of a
particular FP.
NOTE 2: Authentication is generally performed at call set-up, but may also be done at any other
time (e.g. during a call).
bearer service: A type of telecommunication service that provides a defined capability for the
transmission of signals between user-network interfaces.
NOTE 3: The DECT user-network interface corresponds to the top of the network layer (layer 3).
C-Plane: The control plane of the DECT protocol stacks, which contains all of the internal DECT protocol
control, but may also include some external user information.
NOTE 4: The C-Plane stack always contains protocol entities up to and including the network
layer.
call: All of the Network (NWK) layer processes involved in one network layer peer-to-peer association.
NOTE 5: Call may sometimes be used to refer to processes of all layers, since lower layer
processes are implicitly required.
DECT Network (DNW): A network that uses the DECT air interface to interconnect a local network to one
or more portable applications. The logical boundaries of the DECT network are defined to be at the top of
the DECT network layer.
NOTE 6: A DECT Network (DNW) is a logical grouping that contains one or more fixed radio
termination plus their associated portable radio termination. The boundaries of the
DECT network are not physical boundaries.
Fixed Part (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 7: A DECT FP contains the logical elements of at least one fixed radio termination, plus
additional implementation specific elements.
fixed part GSM PLMN attachment (DECT fixed part attached to a GSM MSC): A definition of a
functional environment where a DECT system (FP) is attached to an GSM MSC. The MSC in this case
refers to a functional entity providing the required MM and CC functionality defined in this ETS in order to
communicate with the FP.
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Fixed radio Termination (FT): A logical group of functions that contains all of the DECT processes and
procedures on the fixed side of the DECT air interface.
NOTE 8: A fixed radio termination only includes elements that are defined in the DECT CI
standard. This includes radio transmission elements together with a selection of layer
2 and layer 3 elements.
Generic Access Profile (GAP): A defined part of the DECT Common Interface standard (DECT CI) that
ensures inter-operability between FPs and PPs for public business and residential access services.
geographically unique identity: This term relates to FP identities, Primary Access Rights Identities
(PARIs) and Radio Fixed Part Identities (RFPIs). It indicates that two systems with the same PARI, or
respectively two Radio Fixed Parts (RFPs) with the same RFPI, can not be reached or listened to at the
same geographical position.
Global Network (GNW): A telecommunication network capable of offering a long distance
telecommunication service.
NOTE 9: The term does not include legal or regulatory aspects, nor does it indicate if the
network is a public or a private network.
globally unique identity: The identity is unique within DECT (without geographical or other restrictions).
handover: The process of switching a call in progress from one physical channel to another physical
channel. These processes can be internal (see internal handover) or external (see external handover).
NOTE 10: There are two physical forms of handover, intra-cell handover and inter-cell handover.
Intra-cell handover is always internal. Inter-cell handover can be internal or external.
incoming call: A call received at a PP.
inter-cell handover: The switching of a call in progress from one cell to another cell.
internal handover: Handover processes that are completely internal to one Fixed radio Termination (FT).
Internal handover re-connects the call at the lower layers, while maintaining the call at the NWK layer.
NOTE 11: The lower layer reconnection can either be at the Data Link Control (DLC) layer
(connection handover) or at the MAC layer (bearer handover).
inter-operability: The capability of FPs and PPs, that enable a PP to obtain access to teleservices in
more than one location area and/or from more than one operator (more than one service provider).
inter-operator roaming: Roaming between FP coverage areas of different operators (different service
providers).
Interworking Unit (IWU): A unit that is used to interconnect sub-networks.
NOTE 12: The IWU will contain the interworking functions necessary to support the required
sub-network interworking.
intra-cell handover: The switching of a call in progress from one physical channel of one cell to another
physical channel of the same cell.
intra-operator roaming: Roaming between different FP coverage areas of the same operator (same
service provider).
Local Network (LNW): A telecommunication network capable of offering local telecommunication
services.
NOTE 13: The term does not include legal or regulatory aspects, nor does it indicate if the
network is a public network or a private network.

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ETS 300 792: June 1997
locally unique identity: The identity is unique within one FP or location area, depending on application.
location area: The domain in which a PP may receive (and/or make) calls as a result of a single location
registration.
location registration: The process whereby the position of a DECT portable termination is determined to
the level of one location area, and this position is updated in one or more databases.
NOTE 14: These databases are not included within the DECT FT.
Medium Access Control (MAC) connection: An association between one source MAC Multi-Bearer
Control (MBC) entity and one destination MAC MBC entity. This provides a set of related MAC services (a
set of logical channels), and it can involve one or more underlying MAC bearers.
Multimedia Messaging Service (MMS): The MMS is a generic set of commands, information elements
and functionality for file/messaging service. MMS can be regarded as a DECT internal teleservice that can
be interworked to the similar services in external networks.
Multimedia Messaging Service Protocol (MMSP): A protocol that is used for the provision of MMS
services and functionality that is a stateless protocol which defines a set of messages, framing rules and
information elements each containing optional and mandatory information fields.
outgoing call: A call originating from a PP.
Portable Application (PA): A logical grouping that contains all the elements that lie beyond the DECT
network boundary on the portable side.
NOTE 15: The functions contained in the portable application may be physically distributed, but
any such distribution is invisible to the DECT network.
Portable Part (DECT Portable Part) (PP): A physical grouping that contains all elements between the
user and the DECT air interface. PP is a generic term that may describe one or several physical pieces.
NOTE 16: A DECT PP is logically divided into one portable termination plus one or more portable
applications.
Portable radio Termination (PT): A logical group of functions that contains all of the DECT processes
and procedures on the portable side of the DECT air interface.
NOTE 17: A PT only includes elements that are defined in the DECT CI standard. This includes
radio transmission elements (layer 1) together with a selection of layer 2 and layer 3
elements.
Radio Fixed Part (RFP): One physical sub-group of an FP that contains all the radio end points (one or
more) that are connected to a single system of antennas.
registration: An ambiguous term, that should always be qualified. See either location registration or
subscription registration.
roaming: The movement of a PP from one FP coverage area to another FP coverage area, where the
capabilities of the FPs enable the PP to make or receive calls in both areas.
NOTE 18: Roaming requires the relevant FPs and PP to be inter-operable.
service type F: An application profile specifically supporting teleservices such as fax, building upon the
services offered by the type A/B and C profiles, optimized for terminal simplicity, spectrum efficiency and
network flexibility.
subscription registration: The infrequent process whereby a subscriber obtains access rights to one or
more FPs.
NOTE 19: Subscription registration is usually required before a user can make or receive calls.

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3.2 Abbreviations
For the purposes of this ETS, the following abbreviations apply:
ARI Access Rights Identity
BCD Binary Coded Decimal
BCS Binary Coded Signalling
BSC GSM Base Station Controller
CC Call Control
CI Common Interface
CISS Call Independent Supplementary Services
CK Cipher Key.
CLMS Connectionless Message Service
CNG Calling tone
COMS Connection Oriented Message Service
C-Plane Control Plane
CRSS Call Related Supplementary Services
DAM DECT Authentication Module
DECT Digital Enhanced Cordless Telecommunications
DLC Data Link Control, Layer 2b of the DECT protocol stack
DSAA DECT Standard Authentication Algorithm
DTMF Dual Tone Multi-Frequency
FA Fax Adaptor
FP Fixed Part
FT Fixed radio Termination
GAP Generic Access Profile
GIP DECT/GSM Interworking Profile
IMEI International Mobile Equipment Identity
IMSI International Mobile Subscriber Identity
IPEI International Portable Equipment Identity
IPUI International Portable User Identity
ISDN Integrated Services Digital Network
ISUP ISDN User Part
IWU Interworking Unit
K authentication Key
LAP-U Link Access Procedure (U-Plane)
LCE Link Control Entity
LLME Lower Layer Management Entity
MAC Medium Access Control
MAP GSM Mobile Application Part
MM Mobility Management, a NWK layer functional grouping
MMS Multimedia Messaging Service
MMSP Multimedia Messaging Service Protocol
MSB Most Significant Bit
MS Mobile Station
MSC Mobile Switching Centre
NWK Network
OSI Open Systems Interconnection
PA Portable Application
PARI Primary Access Rights Identity
PARK Portable Access Rights Key
PCM Pulse Coded Modulation
PE Portable Equipment
PLMN Public Land Mobile Network
PP Portable Part
PSTN Public Switched Telephone Network
PT Portable radio Termination
PTNX Private Telecommunications Network Exchange
PUN Portable User Number
PUT Portable User Type
RAND a Random challenge issued by a FP
RES a Response calculated by a PP
RFP Radio Fixed Part
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ETS 300 792: June 1997
RFPI Radio Fixed Part Identity
RS a value used to establish authentication session keys
SARI Secondary Access Rights Identity
SS Supplementary Services
SRES a GSM specific authentication response calculated by the GSM SIM or the DAM
TAF Terminal Adaptation Function
TARI Tertiary Access Rights Identity
TMSI Temporary Mobile Subscriber Identity
TPUI Temporary Portable User Identity
TUP Telephony User Part
UPI User Personal Identification
U-Plane User Plane
3.3 Symbols for status columns
The symbols defined in this subclause are applied for procedures, features, messages, information
elements, fields and field codings in this ETS if not explicitly otherwise stated. The interpretation of status
columns in all tables is as follows:
M Mandatory to map/support/use;
O Optional to map/support/use;
I out-of-scope (not subject for testing);
X prohibited or excluded to map/support/use (the message, information element
may be allowed to be used in the standard/standards but it is not allowed to be
mapped/used depending on the environment/dynamic conditions etc.);
N/A or -(dash) Not Applicable to map/support/use;
C Conditional to map/support/use (the message, information element mapping
depends on the selection of other optional or/and conditional items).
NOTE: The symbol "-" in the mapping section of this ETS means that there is no message,
information element or coding specified in this column.
4 General
This ETS specifies how GSM facsimile services are provided over the DECT air interface.
One of the main objectives is to describe how the GSM teleservice 62, automatic facsimile group 3, is
mapped across the DECT air interface in a formal way, so that inter-operability of different manufacturer's
equipment can be achieved. This is done by describing the interworking unit procedures and mappings
loosely following CCITT Recommendations Q.601 - Q.699 [36] and by describing an air interface profile
following ISO/IEC 9646-6 [35]. The later document enables the subsequent generation of tests cases, if
required.
This ETS is made up of 3 main clauses:
Clause 5: Interworking requirements - includes reference configurations and the protocol architecture
models. Also describes the main service requirements. The context of the interworking profile is also
required.
Clause 6: Interworking mappings, FP attached to the GSM PLMN - Interworking Unit (IWU) mappings for
the facsimile services shows the C-Plane and U-Plane mappings for the FP GSM PLMN attachment in
respective order. Two IWUs are considered; the FP IWU and the PP IWU, although the FP IWU is
expected to be the largest. The signalling mappings are described in terms of IWU procedures with
informative data flow diagrams. Detailed descriptions follow using tables of what is mapped, what is
ignored, and what is transferred transparently. This clause also include other profile specific information.
Clause 7: Interworking connection types - this clause identifies the main DECT connection types (U-Plane
+ C-Plane) at the air interface supporting optimized groups of services, from the IWU mappings for
different configurations/models.

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ETS 300 792: June 1997
5 Interworking requirements
5.1 General
This ETS defines the mandatory requirements for the FP in terms of interworking functions between the
air interface and the external network as well as minimum requirements at the DECT air interface. It also
defines the mandatory requirements for the PP in terms of interworking functions between the air interface
and the PA as well as the minimum requirements for the PP at the DECT air interface.
If not stated otherwise the ETS 300 756 [25] requirements are the basis of this ETS.
NOTE 1: ETS 300 756 [25] is based on ETS 300 370 [10] and ETS 300 651 [22].
The interworking mappings shall be based on the Phase 2 GSM standards.
The basis for interworking shall be the protocols defined in ETS 300 557 [17] (GSM 04.08), in
ETS 300 590 [21] (GSM 08.08), in ETS 300 538 [15] (GSM 03.45) and in ETS 300 539 [16] (GSM 03.46).
The requirements of ETS 300 755 [24], annex C shall be fulfilled in the PT and FT in respect to the
features listed in subclause 5.2 of this ETS.
The procedures which are used depend on which Access Rights Identity (ARI) type is chosen by the PP;
either according to the minimum requirements of ETS 300 755 [24], annex C, or the procedures as
described in this ETS i.e. the PPs, which are based on this ETS shall always be capable of interworking
with FP which fulfil the minimum requirements of the Data Services Profile (DSP) F, class 2,
ETS 300 755 [24], annex C. The FPs, which fulfil the requirements of this ETS, and which support also
non-GSM ARIs (classes A, B or C) shall also support the minimum requirements of ETS 300 755 [24],
annex C.
NOTE 2: The DSP F, class 2 annex C (Interworking conventions to real time facsimile group 3)
describes how interworking to ITU-T Recommendation T.30 [38] real time facsimile
services by using the data service profile F MMSP protocol can be achieved (see
ETS 300 755 [24]). The C-Plane procedures required by this profile are based on
those of a GAP telephone (ETS 300 444 [12]) with additional mandatory elements to
cover data specific aspects of the call set-up and to cover the MMSP requirements.
This ETS defines interworking environments for the FP and the PP in the case when DECT FPs are
functionally attached to the GSM MSC i.e. broadcast attribute a39 "SIM services available" set to '1'B in all
environments (public, business and residential). The PP shall be in alignment with the requirements as
defined in this ETS.
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ETS 300 792: June 1997
5.2 Supported ITU-T Recommendation T.30 features
The facsimile group 3 ITU-T Recommendation T.30 [38] protocol requirements of the data service
profile F, ETS 300 755 [24], annex C shall apply. In addition the requirements specified in subclause 4.2.3
of ETS 300 538 [15] (GSM 03.45) shall apply if the A-interface implementation is based on the transparent
service. The requirements specified in subclause 7.2.1.2 of ETS 300 539 [16] (GSM 03.46) shall apply if
the A-interface implementation is based on non-transparent service. The support of a feature shall be
required if both the GSM (ETS 300 538 [15] (GSM 03.45) or ETS 300 539 [16] (GSM 03.46)) and DECT
parts (ETS 300 755 [24], annex C) support that feature as a mandatory requirement. If a feature is
supported as optional in both DECT and GSM parts the feature may be supported optionally as specified
in the respective standards.
NOTE: This implies that only basic ITU-T Recommendation T.30 [38] telefax based on ITU-T
Recommendation T.4 [37] with automatic calling (ITU-T Recommendation T.30 [38]
operating method 4) is supported and no group 1 and 2 facsimile interworking is
provided. In addition only the standard 300 bit/s Binary Coded Signalling (BCS) and fax
transmission rates up to 9 600 bit/s are provided. Some features, such as error
correcting mode, can be optionally supported.
5.3 Reference configurations
For the reference configuration the requirements of subclause 5.2 of ETS 300 370 [10] shall apply.
5.4 General interworking model for FP GSM PLMN attachment
The general interworking model shown in figure 1 describes the general profile reference configuration of
the FP and PP containing both Control (C) and User (U) planes. The model also shows the location of the
IWUs and the requirements of the air interface.
FP IW U functions/m appings defined in this E TS ,
P P T A F functionality defined in D ata S ervices
in E TS 300 756 and in D ata S ervice P rofile F,
P rofile C , class 2 (E T S 300 651), D ata S ervice
class 2 annex C (E T S 300 755)
P rofileF, class 2 (E T S 300 755) and in E T S 300 370
PP FP
MSC
IW F
GSM
Data Data
GSM
fa csim ile
profile pro file
fa cs im ile
Data
group 3
type F , typ e F ,
group 3
application
sig n a llin g/
m obility m ob ility
sign alling /
SIM
CI
data
class 2
cla ss 2 data
A ir interface functions/requirem ents defined in
D ata S ervice P rofile F , class 2 (E TS 300 755)
and in E TS 300 756
Figure 1: Interworking model of facsimile group 3 for FP GSM PLMN attachment
The C-Plane part of the IWU (figure 1) in the FP provides the mapping between a subset of the GSM
Layer 3 protocols and the corresponding DECT NWK protocols (MM and CC).
The communication model of the U-Plane has been illustrated in figure 2. The U-Plane part of the IWU in
the FP provides the mapping of the GSM facsimile service ITU-T Recommendation T.30 [38] protocol to
the DECT F data profile, class 2 MMSP layer and vice versa. The A-interface regarding the facsimile
service functionality shall be according to ETS 300 538 [15] (GSM 03.45) or ETS 300 539 [16]
(GSM 03.46).
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ETS 300 792: June 1997
The interworking in FP IWU shall be according to ETS 300 755 [24] annex C and to this ETS.
The IWU in the PP provides the mapping of a subset of the DECT layer 3 protocols to the SIM. The
Terminal Adaptation Function (TAF) is part of the IWU in the PP and it provides mapping and control of
the DECT U-Plane and C-Plane data related to the end-to-end service to the GSM application or the data
application/interface. A Fax Adaptor (FA) may be used to provide a standard facsimile group 3 interface
on the PP side. However, the interworking between the DECT PP and a Fax Adaptor (FA) as well as the
functionality of the FA is outside of the scope of this standard. The PP TAF procedures defined in
ETS 300 651 [22], clause C.4 and used in ETS 300 756 [25] shall apply if a CCITT Recommendation
V.24 [41] connection is provided in the PP TAF. These optional procedures have been defined in
subclause 6.3. The MMSP conversion back to the ITU-T Recommendation T.30 [38] protocol in the
PP/TAF is outside of the scope of this ETS.
NOTE: This implies that, e.g. the tonal signal generation for the ITU-T Recommendation
T.30 [38] facsimile equipment is outside of the scope of this ETS.
PLMN
G3 G3
FP IWU MSC/IWF PSTN
FA IWU PP
fax fax
DECT air
2 wire V.24 A-interface
interface
ISDN
ITU-T R ecom m enda tion T.30 procedures
T.30 (outside of scope) MMSP T.30' T.30
Figure 2: Communication model
5.5 Service requirements
General description of service requirements, functional capabilities and information flows are specified in
ETS 300 466 [13]. The detailed information regarding the supported service and service types required by
this ETS are defined in table 1. The service provided by the data profile F, ETS 300 755 [24] is transparent
on the service level i.e. the data profile F profile MMSP protocol is interworking with ITU-T
Recommendation T.30 [38] protocol in the FP IWU. Therefore, it is irrelevant to the DECT air interface
whether the A-interface solution is based on the GSM non-transparent or transparent facsimile group 3
implementation.
Table 1: The GSM teleservices supported by this ETS
GSM teleservice Teleservice name Connection type Rates (note 2)
number
62 Automatic facsimile group 3 non-transparent or 9,6 kbit/s
transparent (note 1) 4
...