SIST ETS 300 303:1997

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Digitalno omrežje z integriranimi storitvami (ISDN) - Signalizacijski vmesnik ISDN - globalni sistem mobilnih komunikacij (GSM) javnega kopenskega mobilnega omrežja (PLMN)Integrated Services Digital Network (ISDN); ISDN - Global System for Mobile communications (GSM) Public Land Mobile Network (PLMN) signalling interface33.080Digitalno omrežje z integriranimi storitvami (ISDN)Integrated Services Digital Network (ISDN)ICS:Ta slovenski standard je istoveten z:ETS 300 303 Edition 1SIST ETS 300 303:1997en01-maj-1997SIST ETS 300 303:1997SLOVENSKI
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SIST ETS 300 303:1997



EUROPEANETS 300 303TELECOMMUNICATIONJuly 1994STANDARDSource: ETSI TC-SPSReference: DE/SPS-01008ICS:33.080Key words:ISDN, SS7, ISUP, GSM, mobile, radio, PLMN, interworkingIntegrated Services Digital Network (ISDN);ISDN - Global System for Mobile communications (GSM)Public Land Mobile Network (PLMN) signalling interfaceETSIEuropean 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: secretariat@etsi.frTel.: +33 92 94 42 00 - Fax: +33 93 65 47 16Copyright 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 1994. All rights reserved.SIST ETS 300 303:1997



Page 2ETS 300 303: July 1994Whilst 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 300 303:1997



Page 3ETS 300 303: July 1994ContentsForeword.51Scope.72Normative references.83Symbols and abbreviations.84Deviations from the provisions of ETS 300 121.94.1Formats and codes.94.2Basic call.94.2.1Calls from the PLMN to the fixed network.94.2.1.1Gateway in the PLMN.94.2.1.1.1Initial address message.94.2.2Calls from the fixed network to the PLMN.94.2.2.1Gateway in the fixed network.94.2.2.1.1Initial address message.94.2.2.2Gateway in the PLMN.104.2.2.2.1Answer message, connect message.104.2.2.2.2Address complete message.104.2.3Echo control procedure.105Message Transfer Part (MTP) protocol requirements.11Annex A (normative):Considerations on supplementary services.12A.1Calling Line Identification Presentation/Restriction (CLIP/CLIR) supplementary services.12A.2Connected Line Identification Presentation/Restriction (COLP/COLR) supplementary services.12A.3Closed User Group (CUG) supplementary service.12A.4User-to-User Signalling service 1 implicit (UUS1i) supplementary service.12A.5Terminal Portability (TP) supplementary service.12A.6Subaddressing (SUB) supplementary service.12Annex B (normative):Formats and codes.13B.1General functions of messages and signals.13B.1.1Exceptions and clarifications to CCITT Recommendation Q.767.13B.1.2Additional definitions.13B.2Formats and codes.13B.2.1Exceptions and clarifications to CCITT Recommendation Q.767.13Annex C (informative):Examples of echo control procedures.15C.1Outgoing call in a Mobile-service Switching Centre (MSC).15C.2Incoming call in the MSC.15C.3Examples of echo control procedure.16C.3.1Call from a mobile station to a mobile station via the fixed network.16C.3.2Call from a mobile station to fixed network with no echo control device.16SIST ETS 300 303:1997



Page 4ETS 300 303: July 1994C.3.3Call from a mobile station to fixed network with echo control device.16C.3.4Call from fixed network with no echo control device to a mobile station roaming in aPLMN of another country.17C.3.5Call from fixed network with echo control device to a mobile station roaming in a PLMNof another country.17C.3.6Call from fixed network with no echo control device to a mobile station.17C.3.7Call from fixed network with echo control device to a mobile station.17C.3.8Call forwarded by the VMSC.18C.3.9Call forwarded by the VMSC to the fixed network with no echo control device.18C.3.10Call with no outgoing echo control device included in a preceding exchange forwardedby the VMSC to the fixed network with no echo control device in the terminatingnetwork.18C.3.11Call with no outgoing echo control device included in a preceding exchange forwardedby the VMSC to the fixed network with echo control device in the terminating network.18Annex D (informative):Bibliography.19History.20SIST ETS 300 303:1997



Page 5ETS 300 303: July 1994ForewordThis European Telecommunication Standard (ETS) has been produced by the Signalling Protocols andSwitching (SPS) Technical Committee of the European Telecommunications Standards Institute (ETSI).This ETS specifies the first version of the Integrated Services Digital Network (ISDN) - Global System forMobile communications (GSM) Public Land Mobile Network (PLMN) signalling interface.ETS 300 121 (1992) containing the specification of ISDN User Part (ISUP) version 1 is used as a basis forthis interface. The appropriate modifications to ETS 300 121 are described in this ETS.SIST ETS 300 303:1997



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Page 7ETS 300 303: July 19941ScopeThis European Telecommunication Standard (ETS) specifies a first version of the Integrated ServicesDigital Network (ISDN) - Global System for Mobile communications (GSM) Public Land Mobile Network(PLMN) signalling interface. This ETS is applicable to the first interconnection of PLMN and ISDN.NOTE:A future ETS may cover the application of the ISDN User Part (ISUP) version 2 on thesignalling interface.The ISUP interface defined is the trunk signalling interface between the PLMN and the ISDN. It isassumed that the interface between PLMN and ISDN can occur in any point in a national network.This signalling interface is based on ISUP version 1 (as given in ETS 300 121 [2]) which supports thefollowing services:Bearer services:-64 kbit/s unrestricted;-Speech;-3,1 kHz audio.Teleservices:-Telephony;-Teletex;-Telefax Group 4;-Mixed mode;-Videotex;-Telefax Group 2/3.Supplementary services:-Calling Line Identification Presentation (CLIP)/Calling Line Identification Restriction (CLIR)supplementary services;-Connected Line Identification Presentation (COLP)/Connected Line Identification Restriction(COLR) supplementary services;-Closed User Group (CUG) supplementary service;-User-to-User Signalling service 1 implicit (UUS1i) supplementary service.The Direct Dialling In (DDI) supplementary service and Multiple Subscriber Number (MSN) supplementaryservice have no impact on this interface. The Subaddressing (SUB) supplementary service and TerminalPortability (TP) supplementary service are implicitly supported, as part of the basic ETS 300 121 [2]procedures.An additional parameter is added to prevent looping of forwarded calls across this interface.The support of the above mentioned services on this interface does not necessarily imply that the servicesare supported in one or the other of the networks interconnected.As this interface is used within national networks, ETS 300 121 [2] is modified to be suitable forISDN/PLMN applications. The application of the echo control procedures is described.SIST ETS 300 303:1997



Page 8ETS 300 303: July 19942Normative 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 the latestedition of the publication referred to applies.[1]ETS 300 008 (1991): "Integrated Services Digital Network (ISDN); CCITTSignalling System No.7; Message Transfer Part (MTP) to support internationalinterconnection".[2]ETS 300 121 (1992): "Integrated Services Digital Network (ISDN); Application ofthe ISDN User Part (ISUP) of CCITT Signalling System No.7 for internationalISDN interconnections (ISUP version 1)".[3]ETS 300 540: "European digital cellular telecommunications system (Phase 2);Transmission planning aspects of the speech service in the GSM Public LandMobile Network (PLMN) system (GSM 03.50)".[4]CCITT Recommendation Q.767 (1991): "Application of the ISDN user part ofCCITT signalling system No.7 for international ISDN interconnections".3Symbols and abbreviationsFor the purposes of this ETS, the following abbreviations apply:ACMAddress Complete MessageCLIPCalling Line Identification PresentationCLIRCalling Line Identification RestrictionCOLPConnected Line Identification PresentationCOLRConnected Line Identification RestrictionCUGClosed User GroupDDIDirect Dialling InGMSCGateway MSC (the exchange where the interrogation of the home locationregister is performed)GSMGlobal System for Mobile communicationsIAMInitial Address MessageISDNIntegrated Services Digital NetworkISUPISDN User PartMSMobile StationMSCMobile-service Switching CentreMSISDNMobile Station ISDN numberMSNMultiple Subscriber NumberMSRNMobile Station Roaming NumberMTPMessage Transfer PartNINetwork IndicatorPLMNPublic Land Mobile NetworkSUBSubaddressingTPTerminal PortabilityUUSUser-to-User SignallingUUS1UUS service 1VMSCVisited MSCSIST ETS 300 303:1997



Page 9ETS 300 303: July 19944Deviations from the provisions of ETS 300 1214.1Formats and codesThe formats and codes specified in CCITT Recommendation Q.767 [4] with the exceptions andclarifications described in tables B.1 and B.2 shall be applicable.4.2Basic callThe gateway exchanges in both networks behave like international incoming or outgoing gateway orinternational transit exchanges in the relevant cases as described in CCITT Recommendation Q.767 [4],with the exceptions indicated in this ETS. The basic call procedures of CCITT Recommendation Q.767 [4]are applicable with the following amendments and clarifications.4.2.1Calls from the PLMN to the fixed network4.2.1.1Gateway in the PLMNThe Initial Address Message (IAM) sent by the gateway in the PLMN is coded taking into account thefollowing exceptions and clarifications.4.2.1.1.1Initial address messageCalled party numberThe called party number parameter may contain a Mobile Station Roaming Number (MSRN).-internal network number indicator:0if the MSRN is included;1otherwise.Calling party numberIf the calling party number parameter contains the Mobile Station ISDN number (MSISDN), it is coded asfollows:-nature of address indicator:000 0100(international number) in case of a foreign Mobile Station (MS);000 0011(national significant number) in case of a national MS.User service informationThe IAM shall always include a user service information parameter for calls to the fixed network when theISDN access indicator is set to ISDN.4.2.2Calls from the fixed network to the PLMN4.2.2.1Gateway in the fixed network4.2.2.1.1Initial address messageCalled party numberThe
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