SIST EN 300 931 V7.0.1:2003

Digital cellular telecommunications system (Phase 2+) (GSM); Technical realization of facsimile group 3 transparent (GSM 03.45 version 7.0.1 Release 1998)

Upgrade from Phase 2+ to Release 1998

Digitalni celični telekomunikacijski sistem (faza 2+) – Tehnična realizacija faksimilne skupine 3 transparent (GSM 03.45, različica 7.0.1, izdaja 1998)

General Information

• Status: Published
• Publication Date: 30-Nov-2003
• ICS: 33.070.50 - Global System for Mobile Communication (GSM)
• 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
• Ref Project: ETSI EN 300 931 V7.0.1 (2000-01) - Digital cellular telecommunications system (Phase 2+) (GSM); Technical realization of facsimile group 3 transparent (GSM 03.45 version 7.0.1 Release 1998)

Standards Content (Sample)

SLOVENSKI STANDARD
SIST EN 300 931 V7.0.1:2003
01-december-2003
'LJLWDOQLFHOLþQLWHOHNRPXQLNDFLMVNLVLVWHPID]D±7HKQLþQDUHDOL]DFLMD
IDNVLPLOQHVNXSLQHWUDQVSDUHQW*60UD]OLþLFDL]GDMD
Digital cellular telecommunications system (Phase 2+) (GSM); Technical realization of
facsimile group 3 transparent (GSM 03.45 version 7.0.1 Release 1998)
Ta slovenski standard je istoveten z: EN 300 931 Version 7.0.1
ICS:
33.070.50 Globalni sistem za mobilno Global System for Mobile
telekomunikacijo (GSM) Communication (GSM)
SIST EN 300 931 V7.0.1:2003 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN 300 931 V7.0.1:2003

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SIST EN 300 931 V7.0.1:2003
ETSI EN 300 931 V7.0.1 (2000-01)
European Standard (Telecommunications series)
Digital cellular telecommunications system (Phase 2+);
Technical realization of facsimile group 3 transparent
(GSM 03.45 version 7.0.1 Release 1998)
R
GLOBAL SYSTEM FOR
MOBILE COMMUNICATIONS

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SIST EN 300 931 V7.0.1:2003
(GSM 03.45 version 7.0.1 Release 1998) 2 ETSI EN 300 931 V7.0.1 (2000-01)
Reference
REN/SMG-040345Q7
Keywords
Digital cellular telecommunications system,
Global System for Mobile communications (GSM)
ETSI
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[e-mail]
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If you find errors in the present document, send your
comment to: [e-mail]
Important notice
This ETSI deliverable may be made available in more than one electronic version or in print. In any case of existing or
perceived difference in contents between such versions, the reference version is the Portable Document Format (PDF).
In case of dispute, the reference shall be the printing on ETSI printers of the PDF version kept on a specific network
drive within ETSI Secretariat.
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 2000.
All rights reserved.
ETSI

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SIST EN 300 931 V7.0.1:2003
(GSM 03.45 version 7.0.1 Release 1998) 3 ETSI EN 300 931 V7.0.1 (2000-01)
Contents
Intellectual Property Rights.5
Foreword.5
0 Scope .6
0.1 References .6
0.2 Definitions and abbreviations.7
1 Service definition .8
2 Network architecture.8
3 Reference configuration at the mobile station .9
3.1 Fax Adaptor functionality.10
3.2 GSM Facsimile Machine functionality.10
4 Connection types.11
4.1 Information transfer protocol model.12
4.2 Interactions with T.30.13
4.2.1 Link control strategy.13
4.2.1.1 Message detection .14
4.2.2 Speed conversion for BCS phases .14
4.2.3 Compatibility checking .15
4.2.3.1 Group 1 and Group 2 support.15
4.2.3.2 2 400 bit/s handshaking.15
4.2.3.3 Non-standard facilities .15
4.2.3.4 12 000 and 7200 bit/s Facsimile Document Transfer.15
4.2.3.5 Procedure interrupts .15
4.2.4 Speed checking .15
4.3 Radio Channel Modification Procedures.16
4.3.1 In Call Modification (ICM) .16
4.3.2 Channel Mode Modify (CMM).17
5 Use of terminal adaptation functions .18
5.1 Standard TAFs for synchronous services .18
5.2 Specific TAFs for facsimile service.18
5.2.1 Working principle.18
5.2.2 Basic protocol structure .19
5.2.2.1 Frame formats .19
5.2.3 Protocol description.20
5.2.3.1 IDLE state .20
5.2.3.2 BCS-REC state.20
5.2.3.3 BCS-TRA state.20
5.2.3.4 MSG-REC state.21
5.2.3.5 MSG-TRA state .21
5.2.4 DCS and TCF processing.22
5.2.5 DCN (disconnect) frame .22
5.2.6 Clocking.22
5.2.7 Timeouts .23
5.3 Specific TAFs for facsimile service (T.30/A).23
5.3.1 Frame detection.23
5.3.2 Message phase .23
5.3.3 Additional CMM request .23
6 Signalling aspects.24
6.1 Handling of Tonal Signals.24
6.2 Call establishment.24
6.2.1 Mobile Terminated Call - Speech then Fax .24
6.2.2 Mobile Terminated Call - Auto answer.25
6.2.3 Mobile Originated Call - Speech then Fax.25
ETSI

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SIST EN 300 931 V7.0.1:2003
(GSM 03.45 version 7.0.1 Release 1998) 4 ETSI EN 300 931 V7.0.1 (2000-01)
6.2.4 Mobile Originated Call - Auto calling .25
6.2.5 Mobile Originated Call - Manual calling .26
6.3 Call release .26
7 Interworking to fixed networks.26
7.1 Interworking to PSTN .26
7.2 Interworking to ISDN.27
Annex I (informative): Protocol entities from CCITT T.30 and T.4.28
Annex II (informative): Procedure examples.29
Annex III (informative): Change Request History .42
History .43
ETSI

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SIST EN 300 931 V7.0.1:2003
(GSM 03.45 version 7.0.1 Release 1998) 5 ETSI EN 300 931 V7.0.1 (2000-01)
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 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://www.etsi.org/ipr).
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 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 the Special Mobile Group (SMG).
The present document defines the technical realization of facsimile group 3 using transparent network support within the
digital cellular telecommunications system.
The contents of the present document is subject to continuing work within SMG and may change following formal SMG
approval. Should SMG modify the contents of the present document it will be re-released with an identifying change of
release date and an increase in version number as follows:
Version 7.x.y
where:
7 indicates Release 1998 of GSM Phase 2+;
x the second digit is incremented for all changes of substance, i.e. technical enhancements, corrections, updates,
etc.;
y the third digit is incremented when editorial only changes have been incorporated in the specification.
The specification from which the present document has been derived was originally based on CEPT documentation,
hence the presentation of the present document may not be entirely in accordance with the ETSI/PNE Rules.
National transposition dates
Date of adoption of this EN: 31 December 1999
Date of latest announcement of this EN (doa): 31 March 2000
Date of latest publication of new National Standard
or endorsement of this EN (dop/e): 30 September 2000
Date of withdrawal of any conflicting National Standard (dow): 30 September 2000
ETSI

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SIST EN 300 931 V7.0.1:2003
(GSM 03.45 version 7.0.1 Release 1998) 6 ETSI EN 300 931 V7.0.1 (2000-01)
0 Scope
The present document deals with the procedures allowing the technical realization of the Group 3 facsimile Service
within the GSM PLMN using transparent Network support, according to the definition of Teleservice 61 and 62
specified in the GSM 02.03 [2].
0.1 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, edition number, version number, etc.) or
non-specific.
• For a specific reference, subsequent revisions do not apply.
• For a non-specific reference, the latest version applies.
• A non-specific reference to an ETS shall also be taken to refer to later versions published as an EN with the same
number.
• For this Release 1998 document, references to GSM documents are for Release 1998 versions (version 7.x.y).
[1] GSM 01.04: "Digital cellular telecommunication system (Phase 2+): "Abbreviations and
acronyms".
[2] GSM 02.03: "Digital cellular telecommunication system (Phase 2+); Teleservices supported by a
GSM Public Land Mobile Network (PLMN)".
[3] GSM 02.34: “Digital cellular telecommunications system (Phase2+): High Speed Circuit Switched
Data (HSCSD) - Stage1”.
[4] GSM 03.10: "Digital cellular telecommunication system (Phase 2+); GSM Public Land Mobile
Network (PLMN) connection types".
[5] GSM 03.34: "Digital cellular telecommunications system (Phase2+): High Speed Circuit Switched
Data (HSCSD) - Stage2.
[6] GSM 04.02: "Digital cellular telecommunication system (Phase 2+); GSM Public Land Mobile
Network (PLMN) access reference configuration".
[7] GSM 04.08: "Digital cellular telecommunication system (Phase 2+); Mobile radio interface layer 3
specification".
[8] GSM 04.21: "Digital cellular telecommunication system (Phase 2+); Rate adaption on the Mobile
Station - Base Station System (MS - BSS) interface".
[9] GSM 07.01: "Digital cellular telecommunication system (Phase 2+); General on Terminal
Adaptation Functions (TAF) for Mobile Stations (MS)".
[10] GSM 07.03: "Digital cellular telecommunication system (Phase 2+); Terminal Adaptation
Functions (TAF) for services using synchronous bearer capabilities".
[11] GSM 09.07: "Digital cellular telecommunication system (Phase 2+); General requirements on
interworking between the Public Land Mobile Network (PLMN) and the Integrated Services
Digital Network (ISDN) or Public Switched Telephone Network (PSTN)".
[12] CCITT Recommendation T.35: "Procedure for the allocation of CCITT members' codes".
[13] CCITT Recommendation F.160 Fascicle II.5: "General operational provision for the international
public facsimile".
ETSI

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SIST EN 300 931 V7.0.1:2003
(GSM 03.45 version 7.0.1 Release 1998) 7 ETSI EN 300 931 V7.0.1 (2000-01)
[14] CCITT Recommendation T.4 Fascicle VII.3: "Standardization of group 3 facsimile apparatus for
document transmission".
[15] CCITT Recommendation T.30 Fascicle VII.3: "Procedures for document facsimile transmission in
the general switched telephone network".
[16] CCITT Recommendation V.21 Fascicle VIII.l: "300 bits per second duplex modem standardized
for use in the general switched telephone network".
[17] CCITT Recommendation V.24 Fascicle VIII.l: "List of definitions for interchange circuits between
data terminal equipment (DTE) and data circuit-terminating equipment (DCE)".
[18] CCITT Recommendation V.25bis Fascicle VIII.l: "Automatic calling and/or answering equipment
on the general switched telephone network (GSTN) using the 100-series interchange circuits".
[19] CCITT Recommendation V.27ter Fascicle VIII.l: "4 800/2 400 bits per second modem
standardized for use in the general switched telephone network".
[20] CCITT Recommendation V.29 Fascicle VIII.l: "9 600 bits per second modem standardized for use
on point-to-point 4-wire leased telephone-type circuits".
[21] CCITT Recommendation V.33 Fascicle VIII.l: "14 400 bits per second modem standardized for
use on point-to-point 4-wire leased telephone-type circuits".
[22] CCITT Recommendation X.300 Fascicle VIII.6: "General principles for interworking between
public networks, and between public networks and other networks for the provision of data
transmission services".
[23] CCITT Recommendation V.17: "A 2-wire modem for facsimile applications with rates up to 14
400 bit/s".
0.2 Definitions and abbreviations
In addition to those below, abbreviations used in the present document are listed in GSM 01.04 [1].
BCS Binary Coded Signalling phase of Facsimile transmission as per CCITT T.30
CT105 Interchange Circuit 105 as per CCITT V.24
CT106 Interchange Circuit 106 as per CCITT V.24
CT107 Interchange Circuit 107 as per CCITT V.24
CT108.2 Interchange Circuit 108/2 as per CCITT V.24
CT109 Interchange Circuit 109 as per CCITT V.24
CT114 Interchange Circuit 114 as per CCITT V.24
CT115 Interchange Circuit 115 as per CCITT V.24
FA/MT The Fax Adaptor specifically located at MT side
FA/IWF The Fax Adaptor specifically located at IWF side
MSG Message phase of Facsimile transmission as per CCITT T.30
All protocol entities from CCITT Facsimile Recommendations (T.4 and T.30) apply; in the present document they are
referenced to in the same way as in the above CCITT Recommendations (see also annex I to the present document).
ETSI

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SIST EN 300 931 V7.0.1:2003
(GSM 03.45 version 7.0.1 Release 1998) 8 ETSI EN 300 931 V7.0.1 (2000-01)
1 Service definition
The fixed network Group 3 Facsimile service, as basically defined in CCITT Recommendation F.160, is an international
telematic service for ISO A4 document transmission between two facsimile stations.
The service specification is comprised of two parts: the control protocol described in CCITT Recommendation T.30,
and the document transmission coding described in CCITT Recommendation T.4.
The GSM facsimile Teleservice is intended to allow facsimile connections between group 3 apparatus using:
- a GSM PLMN as a stand alone facility, for mobile to mobile communication;
- a GSM PLMN to gain access to fixed networks PSTN and ISDN, for mobile to/from land communication.
For this Teleservice, the document coding is as CCITT Recommendation T.4 with no modifications. The protocol used
is CCITT Recommendation T.30 modified within the PLMN as detailed in the present document.
The interworking between different networks is based on CCITT Recommendation X.300.
The particular features of this Teleservice are:
- it uses point-point communication;
- the information transfer capability is dual "Speech"/"Group 3 Facsimile" for Teleservice 61 and "Group 3
Facsimile" only for Teleservice 62;
- both mobile originated and terminated calls are supported;
- the information transfer mode is circuit, duplex, synchronous and symmetric;
- different end-to-end transfer rates are used within the same call to take advantage of the better radio path error
rate;
- use of a standard synchronous terminal adaptation function (as per GSM 07.03) within the MS.
2 Network architecture
The network architecture applicable to this Teleservice is shown in figure 1/03.45, below.
PLMN
v v
PSTN FAX
FAX BSS MSC/IWF
MT
ISDN
Figure 1/03.45: Network architecture
This shows the case of mobile to fixed network interworking. For mobile to mobile calls, there would effectively be a
loop back within the PLMN, using two IWFs.
ETSI

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SIST EN 300 931 V7.0.1:2003
(GSM 03.45 version 7.0.1 Release 1998) 9 ETSI EN 300 931 V7.0.1 (2000-01)
3 Reference configuration at the mobile station
The mobile reference configurations described in this clause are defined as per GSM 04.02.
Mobile Station
R U
2w
m
FAX
a)
FAX /
MT2
Adapt.
S
2w
FAX
b)
FAX /
MT1
TA
Adapt.
2w
FAX
/
c) FAX TA MT1
Adapt.
R
d) FAX
FAX
MT2
Adapt.
FAX
e)
FAX TA
MT1
Adapt.
f)
MT0
Figure 2/03.45: Reference configurations
The Teleservice definition in GSM 02.03 regards the group 3 facsimile terminal as a 2-wire analogue terminated
equipment. In order to connect this to the MT2 a separate "Fax Adaptor" device is necessary.
This configuration, shown in figure 2a/03.45, has to be considered as the standard configuration, so that all the existing
Group 3 facsimile apparatus can be connected to the PLMN.
An alternative realization would be to combine a standard group 3 facsimile machine and the Fax Adaptor into a
specially developed "GSM facsimile machine", directly providing a digital output. Although such a device must appear
to the MT2 as identical to the Fax Adaptor (i.e. with an identical interface and protocol), it would allow for a
significantly smaller and simpler facsimile machine. This configuration is shown in figure 2d/03.45 and is regarded as a
desirable alternative.
In addition of course, it is always possible to realize an MT0, as per figure 2f/03.45, where both the facsimile and
mobile termination functions are considered to be part of one integrated unit.
The remaining configurations concern the use of an S interface and are considered as optional configurations. Their use
is for further study.
The particular terminal adaptation functions used are those detailed in GSM 07.03 and the interface to the MT2 used is
synchronous V.24 with an option for support of V.25bis procedures for autocalling and autoanswering.
ETSI

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SIST EN 300 931 V7.0.1:2003
(GSM 03.45 version 7.0.1 Release 1998) 10 ETSI EN 300 931 V7.0.1 (2000-01)
3.1 Fax Adaptor functionality
The Fax Adaptor block, figure 3/03.45, is intended to specifically complement the Group 3 facsimile apparatus in order
to be able to communicate over a GSM PLMN.
COMPOSITE
MODEM
R
2W
PROTOCOL
MONITORING
&
CONTROL
TONE
HANDLING
Figure 3/03.45: Fax Adaptor scheme
Whether it has to be a function internal to the GSM PLMN, or an external accessory associated with the Group 3
apparatus, is beyond the scope of the present document, and in any case, does not affect at all the working of the
procedure as here described.
It can be functionally partitioned in two sections:
- an analogue section, dealing with:
- the modulation and demodulation processes according to CCITT Recommendation V.21, V.27ter, V.29 and
V.17 as explained in T.4 and T.30;
- handling of the signalling on the 2-wire path to the facsimile machine, including autocalling and autoanswer
functions where necessary (see clause 6).
- a digital section, dealing with:
- monitoring and where necessary, manipulation of the T.30 protocol as detailed in the rest of the present
document;
- overall control of the adaptor;
- connection over the synchronous V.24 interface to the MT as described in GSM 07.03;
- where necessary, autocalling and autoanswering functions according to V.25bis.
In the following this specification will reference the Fax Adaptor functionality, considering the most general case where
it operates as a full-featured (see figure 3/03.45) separate block (see figure 2a/03.45), as this reference configuration is
implicitly or explicitly exhaustive of all service related technical aspects.
3.2 GSM Facsimile Machine functionality
The special GSM facsimile machine shown in the MS configuration of figure 2d/03.45 has a similar functionality to the
digital part of the Fax Adaptor, but without any of the analogue portions.
It appears over the V.24 interface as identical to the Fax Adaptor, i.e. the MT2 needs to have no knowledge of the
particular configuration used.
When necessary this reference configuration, will be explicitly referenced to in the following; otherwise all technical
aspects relevant to the configuration implicitly apply.
ETSI

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SIST EN 300 931 V7.0.1:2003
(GSM 03.45 version 7.0.1 Release 1998) 11 ETSI EN 300 931 V7.0.1 (2000-01)
4 Connection types
Table 1/03.45 shows the connection elements attributes applicable to this Teleservice (note), adapted from GSM 03.10.
NOTE: Teleservice 61 includes both speech and data connection types, but Teleservice 62 only the data
connection type.
Table 1/03.45: Elements of connection types
Protocol type Access to TAF Radio interface Intermediate BS-MSC/IWF
of Figure 6 of TS of the Mobile connection element rate connection
GSM 03.10 Station RA1 to RA2 element
Model 6: Speech - Speech/GSM - CCITT
A-law
Model 5: C/D/S UDI C/D/S UDI C/D/S UDI C/D/S UDI
Facsimile - 14.4 kbit/s - 14.5 kbit/s - 16 kbit/s - 64 kbit/s
Group 3 - 9.6 kbit/s - 12.0 kbit/s - 16 kbit/s - 64 kbit/s
- 4.8 kbit/s - 6.0 kbit/s - 8 kbit/s - 64 kbit/s
- 2.4 kbit/s - 3.6 kbit/s - 8 kbit/s - 64 kbit/s
(note)
Model 5b C/D/S UDI C/D/S UDI C/D/S UDI C/D/S UDI
Facsimile - 14.4 kbit/s 14,5 or 2X12 kbit/s 16 or 2X16 kbit/s - 64 kbit/s
Group 3 - 9.6 kbit/s 12 or 2X6 kbit/s 16 or 2X8 kbits - 64 kbit/s
- 4.8 kbit/s 6 kbit/s 8 kbit/s - 64 kbit/s
- 2.4 kbit/s 6kbits 8 kbit/s - 64 kbit/s
NOTE: The highest Access Rate actually supported in this teleservice will be consistent with the highest Access Rate
of the Transparent Bearer Service provided by the Network Operator.
C = Circuit switched S = Synchronous
D = Full-duplex UDI = Unrestricted Digital Information
Table 1a/03.45
Fax modem rates No. of substreams Radio i/f rate Intermediate Rate Padding Scheme
14.4 kbit/s 1 14,5 kbit/s 16 kbit/s
2 12 kbit/s 16 kbit/s
12.0 kbit/s 1 14,5 kbit/s 16 kbit/s FA(5D + S)
2 12 kbit/s 16 kbit/s FA(5D + S)
9.6 kbit/s 1 12 kbit/s 16 kbit/s
2 6 kbit/s 8 kbit/s
7.2 kbit/s 1 12 kbit/s 16 kbit/s FA(3D + S)
2 6 kbit/s 8 kbit/s FA(3D + S)
4.8 kbit/s 1 6 kbit/s 8 kbit/s
2.4 kbit/s 1 6 kbit/s 8 kbit/s
FA = Padding is performed in the FA
(nD + mS) means that m SYNC frames will be added every n’th DATA frame
The MS must support the combinations in table 1a/03.45, restricted to what has been negotiated between the MS and the
network.
All transitions from one combination in table 1a/03.45 to another combination in the same table, must be supported by
the MS, as long as the fax modem rate is kept constant or the transition of fax modem rate is performed in steps of 2,4
kbit/s.
The figure 4/03.45 shows the scheme of a typical GSM PLMN connection for this Teleservice, considering respectively
R and S access at Network Termination.
ETSI

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SIST EN 300 931 V7.0.1:2003
(GSM 03.45 version 7.0.1 Release 1998) 12 ETSI EN 300 931 V7.0.1 (2000-01)
To grant full support to the CCITT Recommendation T.30, requiring different transmission speeds, the following
strategy shall be implemented:
- PLMN provides for four Access Rates only, that is 14 400 bits/s, 9600 bit/s, 4800 bit/s, 2400 bit/s;
- radio channel modification procedures are used for switching between Speech phase and facsimile phase, as well
as to select the suitable Access Rate (14 400,9600/4800/2400 bit/s) within the facsimile phase, as resulti
...