ETSI ETS 300 539 ed.1 (1995-02)

European digital cellular telecommunications system (Phase 2); Technical realization of facsimile group 3 non-transparent (GSM 03.46)

DE/SMG-040346P

Evropski digitalni celični telekomunikacijski sistem (faza 2) – Tehnična realizacija faksimilne skupine 3 netransparent (GSM 03.46)

General Information

• Status: Published
• Publication Date: 15-Feb-1995
• Technical Committee: SMG 4 - Data Services
• Current Stage: 12 - Completion
• Due Date: 09-Feb-1995
• Completion Date: 16-Feb-1995
• Ref Project: SIST ETS 300 539 E1:2003 - European digital cellular telecommunications system (Phase 2); Technical realization of facsimile group 3 non-transparent (GSM 03.46)

Standards Content (Sample)

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.European digital cellular telecommunications system (Phase 2); Technical realization of facsimile group 3 non-transparent (GSM 03.46)33.070.50Globalni sistem za mobilno telekomunikacijo (GSM)Global System for Mobile Communication (GSM)ICS:Ta slovenski standard je istoveten z:ETS 300 539 Edition 1SIST ETS 300 539 E1:2003en01-december-2003SIST ETS 300 539 E1:2003SLOVENSKI
STANDARD



SIST ETS 300 539 E1:2003



EUROPEANETS 300 539TELECOMMUNICATIONFebruary 1995STANDARDSource: ETSI TC-SMGReference: DE/SMG-040346PICS:33.060.20Key words:European digital cellular communications system, Global System for Mobile communications(GSM)European digital cellular communications system (Phase 2);Technical realization of facsimilé group 3 non-transparent(GSM 03.46)ETSIEuropean Telecommunications Standards InstituteETSI SecretariatPostal address: F-06921 Sophia Antipolis CEDEX - FRANCEOffice address: 650 Route des Lucioles - Sophia Antipolis - Valbonne - FRANCEX.400: c=fr, a=atlas, p=etsi, s=secretariat - Internet: [e-mail].: [phone] - Fax: [phone]Copyright Notification: No part may be reproduced except as authorized by written permission. The copyright and theforegoing restriction extend to reproduction in all media.© European Telecommunications Standards Institute 1995. All rights reserved.SIST ETS 300 539 E1:2003New presentation - see History box



Page 2ETS 300 539: February 1995 (GSM 03.46 version 4.1.2)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.SIST ETS 300 539 E1:2003



Page 3ETS 300 539: February 1995 (GSM 03.46 version 4.1.2)ContentsForeword.51Normative references.72Definitions and abbreviations.83Service definition.84Network architecture.95Reference configuration at the mobile station.105.1Fax adaptor functionality.105.2GSM facsimile machine functionality.116Connection types.126.1Protocol model.136.2Principles of the Facsimile Protocol Adaptation.146.2.1Fax Adaptor Protocol.156.2.2Interactions and interventions within the fax adaptors.166.2.3Training Check.176.2.4 Mobile to mobile calls.186.2.5Facsimile Message Transfer.196.2.5.1Message Transcoding.196.2.5.2Generation of the normal data element.196.2.5.3Generation of the error correction data element.196.3Procedure interrupts.196.4Radio channel modification.196.5Performance constraints.217Use of terminal adaptation functions.217.1Standard TAFs for synchronous services.217.2Specific TAFs for facsimile service.217.2.1BCS phase.227.2.1.1BCS command/response procedures.227.2.1.2Compatibility checking.247.2.1.3Message speed checking.247.2.1.4Control of transmission rate.257.2.1.5Clocking.257.2.2Message phase.257.2.2.1Normal facsimile data.257.2.2.2Error correction facsimile data.267.2.2.3Buffering of facsimile coded data.267.2.2.3.1Transmitter adaptation function.267.2.2.3.2Receiver adaptation function.277.2.3Disconnect procedure.277.2.4Timeouts.278Signalling aspects.278.1Handling of tonal signals.288.2Call establishment.288.2.1Mobile terminated call.288.2.1.1Speech then facsimile.288.2.1.2Auto answer.288.2.2Mobile originated calls.298.2.2.1Speech then facsimile.298.2.2.2Auto calling.30SIST ETS 300 539 E1:2003



Page 4ETS 300 539: February 1995 (GSM 03.46 version 4.1.2)8.2.2.3Manual calling.309Interworking to fixed networks.319.1Interworking to PSTN.319.2Interworking to ISDN.31Annex A (Normative) Structure and contents of the fax adaptor protocol elements.321Principle structure of an element.322Element discriminator coding.322.1BCS element.322.2BCS abort element.322.4Preamble element.322.5Normal fax data element.332.6Error correction fax data element.332.7End of data element.332.8TCF element.333.2BCS abort element.343.3BCS transmit request element.343.4Preamble element.343.5Normal fax data element.343.6Error correction fax data element.343.7End of data element.343.8TCF element.354Relationship of FA protocol elements with LAPB, L2RBOP and RLP.35Appendix I (Informative) Abbreviations from CCITT Rec. T.30 and T.4.36Appendix II (Informative) Procedure Examples.38History.51SIST ETS 300 539 E1:2003



Page 5ETS 300 539: February 1995 (GSM 03.46 version 4.1.2)ForewordThis European Telecommunication Standard (ETS) has been produced by the Special Mobile Group(SMG) Technical Committee (TC) of the European Telecommunications Standards Institute (ETSI).This ETS defines the technical realization of facsimile group 3 using non-transparent network support forthe European digital cellular telecommunications system (Phase 2). This ETS corresponds to GSMTechnical Specification (GSM-TS) GSM 03.46 version 4.1.2.The specification from which this ETS has been derived was originally based on CEPT documentation,hence the presentation of this ETS may not be entirely in accordance with the ETSI/PNE rules.Reference is made within this ETS to GSM-TSs (NOTE).NOTE:TC-SMG has produced documents which give the technical specifications for theimplementation of the European digital cellular telecommunications system.Historically, these documents have been identified as GSM Technical Specifications(GSM-TSs). These TSs may have subsequently become I-ETSs (Phase 1), or ETSs(Phase 2), whilst others may become ETSI Technical Reports (ETRs). GSM-TSs are,for editorial reasons, still referred to in current GSM ETSs.SIST ETS 300 539 E1:2003



Page 6ETS 300 539: February 1995 (GSM 03.46 version 4.1.2)Blank pageSIST ETS 300 539 E1:2003



Page 7ETS 300 539: February 1995 (GSM 03.46 version 4.1.2)0ScopeThis specification deals with the procedures allowing the technical realization of the real time end-to-endfacsimile group 3 service within the GSM PLMN using non-transparent network support according to thedefinition of the Teleservices 61 and 62 specified in GSM 02.03. Within this document particular attentionis given to Teleservice "Alternate speech/facsimile group 3" (Teleservice 61). However, the definitionsapply also to Teleservice "Automatic facsimile group 3" (Teleservice 62) with the exception of all actionsconcerned with the speech phase. Consequently, in the following descriptions the term "Teleservice"denotes both Teleservice 61 and Teleservice 62 as appropriate.Note:Some facilities associated with alternate speech/ facsimile group 3 may not beavailable with version 1 of MAP. In particular, the in-call modification procedurefollowing an inter MSC handover is not supported by this version. This imposes thelimitation that for all calls it will not be possible to change between speech andfacsimile following an inter MSC handover.1Normative referencesThis ETS incorporates by dated and undated reference, provisions from other publications. Thesenormative references are cited at the appropriate places in the text and the publications are listedhereafter. For dated references, subsequent amendments to or revisions of any of these publicationsapply to this ETS only when incorporated in it by amendment or revision. For undated references, thelatest edition of the publication referred to applies.[1]GSM 01.04 (ETR 100): "European digital cellular telecommunication system(Phase 2); Abbreviations and acronyms".[2]GSM 02.03 (ETS 300 502): "European digital cellular telecommunication system(Phase 2); Teleservices supported by a GSM Public Land Mobile Network(PLMN)".[3]GSM 03.10 (ETS 300 528): "European digital cellular telecommunication system(Phase 2); GSM Public Land Mobile Network (PLMN) connection types".[4]GSM 04.02 (ETS 300 551): "European digital cellular telecommunication system(Phase 2); GSM Public Land Mobile Network (PLMN) access referenceconfiguration".[5]GSM 04.08 (ETS 300 557): "European digital cellular telecommunication system(Phase 2); Mobile radio interface layer 3 specification".[6]GSM 04.21 (ETS 300 562): "European digital cellular telecommunication system(Phase 2); Rate adaption on the Mobile Station - Base Station System (MS -BSS) interface".[7]GSM 07.01 (ETS 300 582): "European digital cellular telecommunication system(Phase 2); General on Terminal Adaptation Functions (TAF) for Mobile Stations(MS)".[8]GSM 07.03 (ETS 300 584): "European digital cellular telecommunication system(Phase 2); Terminal Adaptation Functions (TAF) for services using synchronousbearer capabilities".[9]GSM 09.07 (ETS 300 604): "European digital cellular telecommunication system(Phase 2); General requirements on interworking between the Public LandMobile Network (PLMN) and the Integrated Services Digital Network (ISDN) orPublic Switched Telephone Network (PSTN)".[10]CCITT Recommendation F.160: "General operational provisions for theinternational public facsimile services".SIST ETS 300 539 E1:2003



Page 8ETS 300 539: February 1995 (GSM 03.46 version 4.1.2)[11]CCITT Recommendation T.4: "Standardization of group 3 facsimile apparatusfor document transmission".[12]CCITT Recommendation T.30: "Procedures for document facsimiletransmission in the general switched telephone network".[13]CCITT Recommendation T.35: "Procedure for the allocation of CCITTmembers' codes".[14]CCITT Recommendation V.21: "300 bits per second duplex modemstandardised for use in the general switched telephone network".[15]CCITT Recommendation V.24: "List of definitions for interchange circuitsbetween data terminal equipment (DTE) and data circuit-terminating equipment(DCE)".[16]CCITT Recommendation V.25 bis: "Automatic calling and/or answeringequipment on the general switched telephone network (GSTN) using the 100-series interchange circuits".[17]CCITT Recommendation V.27 ter: "4800/2400 bits per second modemstandardised for use in the general switched telephone network".[18]CCITT Recommendation V.29: "9600 bits per second modem standardised foruse on point-to-point 4-wire leased telephone-type circuits".[19]CCITT Recommendation X.300: "General principles and arrangements forinterworking between public data networks, and between public data networksand other networks".2Definitions and abbreviationsIn addition to those below abbreviations used in this specification are listed in GSM 01.04.BCSBinary coded signallingCCTCircuit(s)I/FInterfaceRA1,RA1',RA2Rate adaptation functionsSREJSelective rejectThe abbreviations for the facsimile specific protocol elements and signals are listed in appendix I.3Service definitionThe fixed network facsimile group 3 service, as basically defined in CCITT Rec. F.160, is an internationaltelematic service for document transmission between two facsimile group 3 terminals.The service specifications are comprised of two parts:-the control procedures described in CCITT Rec. T.30 and-the document transmission coding described in CCITT Rec. T.4.The GSM facsimile group 3 Teleservice is intended to allow connections between facsimile group 3terminals using:-a GSM PLMN as stand-alone facility for mobile-to-mobile communication;-a GSM PLMN to have access to fixed networks PSTN and/or ISDN for mobile to/from fixed networkcommunication.For this Teleservice, the coding of the facsimile document is as per CCITT Rec. T.4 and the protocol asper CCITT Rec. T.30 both modified within the PLMN as detailed in this specification.SIST ETS 300 539 E1:2003



Page 9ETS 300 539: February 1995 (GSM 03.46 version 4.1.2)The interworking between different networks is based on CCITT Rec. X.300.The particular features of this Teleservice are:-it uses point-to-point communication;-the information transfer mode is circuit, duplex, synchronous;-the information transfer capability is alternate speech/ facsimile group 3 or facsimile group 3 only;-both mobile originated and mobile terminated calls are supported;-different end-to-end message speeds as per CCITT Rec T.30 may be used within the sameconnection to match the appropriate quality requirements;-use of the standard synchronous terminal adaptation function for non-transparent network support(as per GSM 07.03) within the MS is envisaged.4Network architectureThe network architecture applicable to this Teleservice is shown in Figure 1/03.46 below.
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Page 10ETS 300 539: February 1995 (GSM 03.46 version 4.1.2)5Reference configuration at the mobile stationThe mobile station reference configurations described in this clause are defined as per GSM 04.02.
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ÀÄÄÄÄÄÙ :Figure 2/03.46: Reference configurationsThe teleservice definitions in GSM 02.03 regard the facsimile group 3 terminal as a 2-wire analogueterminated equipment. In order to connect this to the MT2 a separate "fax adaptor" device is necessary.This configuration, shown in Figure 2a/03.46, has to be considered as the standard configuration, so thatall the existing facsimile group 3 terminals can be connected to the PLMN.An alternative realization would be to combine a facsimile group 3 terminal and the fax adaptor into aspecial "GSM facsimile machine", directly providing a digital output. Although such a terminal must appearto the MT2 as identical as the fax adaptor (i.e. with an identical interface and protocol), it would allow for asignificantly smaller and simpler facsimile machine. This configuration is shown in Figure 2d/03.46.In addition of course, it is always possible to realize an MT0, as per Figure 2f/03.46, where both thefacsimile 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 optionalconfigurations. Their use is for further study.The particular terminal adaptation functions used are those detailed in GSM 07.03 for non-transparentbearer capability. The interface to the MT2 used is according to CCITT Rec. V.24 with an option forsupport of CCITT Rec. V.25bis procedures for auto calling and auto answering.5.1Fax adaptor functionalityThe fax adaptor block, Figure 3/03.46, is intended to specifically complement the facsimile group 3terminal in order to be able to communicate over a GSM PLMN.SIST ETS 300 539 E1:2003



Page 11ETS 300 539: February 1995 (GSM 03.46 version 4.1.2)
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Page 12ETS 300 539: February 1995 (GSM 03.46 version 4.1.2)6Connection typesTable 1/03.46 shows the connection elements attributes applicable to these Teleservices, extracted fromGSM 03.10.Protocol typeAccess to TAFRadio interfaceIntermediateBS-MSC/IWFof fig. 6of the Mobileconnection elementrateconnectionGSM 03.10StationRA1 to RA2elementModel 6: Speech----Speech/GSM----CCITT A-lawModel 7:C/D/S UDIC/D/S UDIC/D/S UDIC/D/S UDIFacsimile- 9.6 kbit/s- 12 kbit/s- 16 kbit/s- 64 kbit/sGroup 3 NT(- 4.8 kbit/s)(- 2.4 kbit/s)C = circuit switchedS = synchronousD = duplexUDI = unrestricted digital informationTable 1/03.46: Connection elementsFigure 4/03.46 shows the scheme of a typical GSM PLMN connection for these teleservices, consideringR and S access, respectively, at network termination.To support the CCITT Rec. T.30, requiring different transmission rates, the following strategy shall beimplemented:-the channel on the radio interface shall be a full rate channel used for RLP protocol transmission(non-transparent network support);-no modification procedure (Channel Mode Modify: CMM) shall be performed during the data phaseof the call;-the user rate of the MT2 is preferably set to 9600 bit/s;-the transmission rate between the fax adaptor and the associated facsimile terminal at both endsshall be the same, i.e. there will be only one common end-to-end transmission rate at any giventime;-the negotiation of the message speed shall be end-to-end between the two facsimile terminals; thisallows also for a message speed of 7200 bit/s to be used;-the connection between the fax terminals is divided into three logical sections (fax terminal -(1)- faxadaptor -(2)- fax adaptor -(3)- fax terminal);-flag stuffing is applied by the fax adaptor towards the associated facsimile terminal within theconstraints of CCITT Rec. T.30, to keep the data link active whenever a procedure delay occurs;-the BCS protocol elements and the facsimile coded data are buffered at both ends of the radiointerface (in the fax adaptors), if necessary, to guarantee data integrity;-a specific fax adaptor protocol (FA protocol) is provided between both the fax adaptors to cater forthe appropriate link control.SIST ETS 300 539 E1:2003



Page 13ETS 300 539: February 1995 (GSM 03.46 version 4.1.2)RDTE
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ÈÍÍͼFigure 4b/03.46: Optional Teleservice connection6.1Protocol modelFigure 5/03.46 depicts the protocol model for this Teleservice, deduced from model 7 of Figure 6/GSM03.10.It should be noted that depending on the particular implementation the R reference point may not explicitlyexist. In this case the LAPB protocol and consequently the LAPB entities operating across this interfacemay be omitted. The protocol stack at the radio interface, however, is not affected by this consideration,i.e. RLP and L2RBOP always apply.The main point to be underlined is that all the protocol modules specific for this Teleservice are confined inthe fax adaptor functions at both the MT and MSC/IWF ends. This includes the layer 2 entity function forLAPB to be operated towards the standard TAF for synchronous non-transparent bearer capability.SIST ETS 300 539 E1:2003



Page 14ETS 300 539: February 1995 (GSM 03.46 version 4.1.2)
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|Figure 5/03.46: Protocol model for non-transparent support6.2Principles of the Facsimile Protocol AdaptationThe basic approach of this specification for facsimile group 3 is-to use the standard non-transparent network support (including e.g. standard MT) as basicallydefined in technical specifications GSM 07.01, GSM 07.03, and GSM 09.07,-to use the CCITT Rec. T.30 procedure at both ends of the connection between the fax adaptor andthe associated facsimile terminal and to pass the protocol elements according to CCITT Rec. T.30functionally unchanged wherever possible,-to use a specific protocol between both the fax adaptors across the radio interface and-to intervene within the fax adaptors in order to concatenate the applicable connection sections.Basically there are four problem areas:-support of facsimile group 3 with a digital connection type;-unpredictable delays on the radio interface due to actual RLP working conditions (ARQ);-the need to change the transmission rate "locally" in the fax adaptors both in the MS and in theMSC/IWF and to adapt it to the constant user rate of the TAF;-the inability to support some CCITT Rec. T.30 features.T
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