SIST EN 300 403-1 V1.3.2:2005
(Main)Integrated Services Digital Network (ISDN); Digital Subscriber Signalling System No. one (DSS1) protocol; Signalling network layer for circuit-mode basic call control; Part 1: Protocol specification [ITU-T Recommendation Q.931 (1993), modified]
General Information
- Abstract
To update the Date/Time information element according to contribution TD 207 and the BC, LLC with new codepoints. Supporting ETSI Member Organisations; VIAG Interkom, Swisscom, KPN, Telenor.
- Status
- Published
- Publication Date
- 31-Mar-2005
- Technical Committee
- SPN - Services and Protocols for Networks
- Current Stage
- 6060 - National Implementation/Publication (Adopted Project)
- Start Date
- 01-Apr-2005
- Due Date
- 01-Apr-2005
- Completion Date
- 01-Apr-2005
- Mandate
- T-234B
Overview
SIST EN 300 403-1 V1.3.2:2005 is a European standard developed under the auspices of the Slovenski inštitut za standardizacijo (SIST) and aligned with ETSI. It specifies the protocol for the Digital Subscriber Signalling System No. one (DSS1) at the network layer, supporting circuit-mode basic call control for the Integrated Services Digital Network (ISDN). This version is based on the ITU-T Recommendation Q.931 (1993) and has been modified to update the Date/Time information element and Bearer Capability/Low Layer Compatibility (BC, LLC) codepoints in accordance with current European telecommunications requirements.
The standard is foundational for enabling reliable, interoperable digital communications for telephony and data services between users and public or private ISDN networks.
Key Topics
- ISDN DSS1 Signalling
Defines protocol procedures for call establishment, control, and release across the user-network interface (UNI) at the T or S/T reference points. - Circuit-Mode Call Control
Specifies state machines and message flows required to control setup, modification, and clearing of circuit-switched calls. - Information Element Updates
Provides enhanced support for the Date/Time information element (per TD 207) and introduces new codepoints for Bearer Capability and Low Layer Compatibility to support evolving network and service requirements. - Protocol Conformance
Establishes reference specification for equipment manufacturers to ensure compliance and interoperability within pan-European ISDN deployments. - User and Network Interaction
Outlines the behaviour and required responses for both user-side and network-side protocol entities according to various call scenarios.
Applications
SIST EN 300 403-1 V1.3.2:2005 is directly applicable to:
- ISDN Terminal Equipment Design
Manufacturers use this protocol specification to develop and certify ISDN phones, adapters, and PBXs with compliant signalling behaviour for circuit-mode basic calls. - Public and Private ISDN Networks
Network providers employ the standard for configuration and verification of exchanges and access devices to facilitate seamless digital communications across the UNI. - Supplementary Services Integration
Supports the addition of supplementary services (such as call waiting, call hold, or number display) by providing a strong protocol foundation for basic call control onto which optional features can be layered. - Conformance Testing and Certification
Testing bodies and operators use the protocol specification as a baseline for equipment acceptance and interoperability verification in multi-vendor and multi-operator environments. - European Telecommunications Deployment
Operators across Europe-including VIAG Interkom, Swisscom, KPN, and Telenor-utilize this standard to ensure harmonized service delivery over ISDN.
Related Standards
The DSS1 protocol as described in SIST EN 300 403-1 V1.3.2:2005 references and interacts with a suite of related ISDN standards, including:
- ITU-T Recommendation Q.931 (1993) – Baseline international protocol for circuit-switched network layer signalling, with European modifications.
- EN 300 403-2 – SDL diagrams for DSS1 circuit-mode control.
- EN 300 402-1/2 – DSS1 data link layer protocol specifications.
- EN 300 485 – Cause and location definitions for DSS1 and ISUP.
- EN 300 102/103/104/106/107 – Protocol specifications for supplementary ISDN services such as CLIP, CLIR, call waiting, diversion, and user-to-user signalling.
Keywords: ISDN, DSS1, digital subscriber signalling, circuit-mode, basic call control, protocol specification, network layer, ITU-T Q.931, European telecommunications, interoperability, information elements, UNI, conformance.
By adhering to SIST EN 300 403-1 V1.3.2:2005, equipment providers and network operators are assured of robust interoperability and future-proofed compatibility across European ISDN deployments, supporting both legacy applications and the continued evolution of digital telecommunication services.
Get Certified
Connect with accredited certification bodies for this standard
BSI Group
BSI (British Standards Institution) is the business standards company that helps organizations make excellence a habit.
NYCE
Mexican standards and certification body.
ANCE
Mexican certification and testing association.
Sponsored listings
Frequently Asked Questions
SIST EN 300 403-1 V1.3.2:2005 is a standard published by the Slovenian Institute for Standardization (SIST). Its full title is "Integrated Services Digital Network (ISDN); Digital Subscriber Signalling System No. one (DSS1) protocol; Signalling network layer for circuit-mode basic call control; Part 1: Protocol specification [ITU-T Recommendation Q.931 (1993), modified]". This standard covers: To update the Date/Time information element according to contribution TD 207 and the BC, LLC with new codepoints. Supporting ETSI Member Organisations; VIAG Interkom, Swisscom, KPN, Telenor.
To update the Date/Time information element according to contribution TD 207 and the BC, LLC with new codepoints. Supporting ETSI Member Organisations; VIAG Interkom, Swisscom, KPN, Telenor.
SIST EN 300 403-1 V1.3.2:2005 is classified under the following ICS (International Classification for Standards) categories: 33.080 - Integrated Services Digital Network (ISDN); 35.100.30 - Network layer. The ICS classification helps identify the subject area and facilitates finding related standards.
SIST EN 300 403-1 V1.3.2:2005 is associated with the following European legislation: Standardization Mandates: T-234B. When a standard is cited in the Official Journal of the European Union, products manufactured in conformity with it benefit from a presumption of conformity with the essential requirements of the corresponding EU directive or regulation.
SIST EN 300 403-1 V1.3.2:2005 is available in PDF format for immediate download after purchase. The document can be added to your cart and obtained through the secure checkout process. Digital delivery ensures instant access to the complete standard document.
Standards Content (Sample)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.VSUHPHQMHQRIntegrated Services Digital Network (ISDN); Digital Subscriber Signalling System No. one (DSS1) protocol; Signalling network layer for circuit-mode basic call control; Part 1: Protocol specification [ITU-T Recommendation Q.931 (1993), modified]35.100.30Omrežni slojNetwork layer33.080Digitalno omrežje z integriranimi storitvami (ISDN)Integrated Services Digital Network (ISDN)ICS:Ta slovenski standard je istoveten z:EN 300 403-1 Version 1.3.2SIST EN 300 403-1 V1.3.2:2005en01-april-2005SIST EN 300 403-1 V1.3.2:2005SLOVENSKI
STANDARD
ETSIEN300403-1V1.3.2(1999-11)EuropeanStandard(Telecommunicationsseries)IntegratedServicesDigitalNetwork(ISDN);DigitalSubscriberSignallingSystemNo.one(DSS1)protocol;Signallingnetworklayerforcircuit-modebasiccallcontrol;Part1:Protocolspecification[ITU-TRecommendationQ.931(1993),modified]SIST EN 300 403-1 V1.3.2:2005
ETSIETSIEN300403-1V1.3.2(1999-11)2ReferenceREN/SPS-05210-1(3qc90j1c.PDF)Keywordsbasic,DSS1,ISDN,layer3,protocol,UNIETSIPostaladdressF-06921SophiaAntipolisCedex-FRANCEOfficeaddress650RoutedesLucioles-SophiaAntipolisValbonne-FRANCETel.:+33492944200Fax:+33493654716SiretN°34862356200017-NAF742CAssociationàbutnonlucratifenregistréeàlaSous-PréfecturedeGrasse(06)N°7803/88Internetsecretariat@etsi.frIndividualcopiesofthisETSIdeliverablecanbedownloadedfromhttp://www.etsi.orgIfyoufinderrorsinthepresentdocument,sendyourcommentto:editor@etsi.frImportantnoticeThisETSIdeliverablemaybemadeavailableinmorethanoneelectronicversionorinprint.Inanycaseofexistingorperceiveddifferenceincontentsbetweensuchversions,thereferenceversionisthePortableDocumentFormat(PDF).Incaseofdispute,thereferenceshouldbetheprintingonETSIprintersofthePDFversionkeptonaspecificnetworkdrivewithinETSISecretariat.CopyrightNotificationNopartmaybereproducedexceptasauthorizedbywrittenpermission.Thecopyrightandtheforegoingrestrictionextendtoreproductioninallmedia.©EuropeanTelecommunicationsStandardsInstitute1999.Allrightsreserved.SIST EN 300 403-1 V1.3.2:2005
ETSIETSIEN300403-1V1.3.2(1999-11)3IntellectualPropertyRightsIPRsessentialorpotentiallyessentialtothepresentdocumentmayhavebeendeclaredtoETSI.TheinformationpertainingtotheseessentialIPRs,ifany,ispubliclyavailableforETSImembersandnon-members,andcanbefoundinSR000314:"IntellectualPropertyRights(IPRs);Essential,orpotentiallyEssential,IPRsnotifiedtoETSIinrespectofETSIstandards",whichisavailablefromtheETSISecretariat.LatestupdatesareavailableontheETSIWebserver(http://www.etsi.org/ipr).PursuanttotheETSIIPRPolicy,noinvestigation,includingIPRsearches,hasbeencarriedoutbyETSI.NoguaranteecanbegivenastotheexistenceofotherIPRsnotreferencedinSR000314(ortheupdatesontheETSIWebserver)whichare,ormaybe,ormaybecome,essentialtothepresentdocument.ForewordThisEuropeanStandard(Telecommunicationsseries)hasbeenproducedbyETSITechnicalCommitteeServicesandProtocolsforAdvancedNetworks(SPAN).Thepresentdocumentispart1ofamulti-partENcoveringtheIntegratedServicesDigitalNetwork(ISDN);DigitalSubscriberSignallingSystemNo.one(DSS1)protocol;Signallingnetworklayerforcircuit-modebasiccallcontrol,asidentifiedbelow:Part1:"Protocolspecification[ITU-TRecommendationQ.931(1993),modified]";Part2:"SpecificationandDescriptionLanguage(SDL)diagrams";Part3:"ProtocolImplementationConformanceStatement(PICS)proformaspecification";Part4:"TestSuiteStructureandTestPurposes(TSS&TP)specificationfortheuser";Part5:"AbstractTestSuite(ATS)andpartialProtocolImplementationeXtraInformationforTesting(PIXIT)proformaspecificationfortheuser";Part6:"TestSuiteStructureandTestPurposes(TSS&TP)specificationforthenetwork";Part7:"AbstractTestSuite(ATS)andpartialProtocolImplementationeXtraInformationforTesting(PIXIT)proformaspecificationforthenetwork".ThepresentdocumentwhichisbaseduponITU-TRecommendationQ.931(1993)isanextendedandupdatedversionofETS300403-1(1995)andETS300102-1(1990).AnnexZAidentifiesrelevantdifferencesbetweenthepresentdocumentandthesestandards.NationaltranspositiondatesDateofadoptionofthisEN:12November1999DateoflatestannouncementofthisEN(doa):29February2000DateoflatestpublicationofnewNationalStandardorendorsementofthisEN(dop/e):31August2000DateofwithdrawalofanyconflictingNationalStandard(dow):31August2000EndorsementnoticeTheelementsofITU-TRecommendationQ.931(1993)apply,withthefollowingmodifications:NOTE:Underliningand/orstrikeoutareusedtohighlightdetailedmodificationswherenecessary.SIST EN 300 403-1 V1.3.2:2005
ETSIETSIEN300403-1V1.3.2(1999-11)4Page1,clause1Deleteclause1(General)andsubclause1.1(ScopeoftheRecommendation).Insertthefollowingthreeclauses(Scope,References,Definitions)atthestartofthetext:ScopeThepresentdocumentspecifiesthestagethreeofcircuit-modeon-demandbasictelecommunicationservicesforthepan-EuropeanIntegratedServicesDigitalNetwork(ISDN)asprovidedbyEuropeantelecommunicationsoperatorsattheTreferencepointorcoincidentSandTreferencepoint(asdefinedinITU-TRecommendationI.411[95]bymeansoftheDigitalSubscriberSignallingSystemNo.one(DSS1).Stagethreeidentifiestheprotocolproceduresandswitchingfunctionsneededtosupportatelecommunicationservice(seeCCITTRecommendationI.130[92]).Inaddition,thepresentdocumentspecifiestheprotocolrequirementsattheTreferencepointwheretheserviceisprovidedtotheuserviaaprivateISDN.NOTE1:ProceduresattheTreferencepoint,tosupporttheaccessofaprivateISDNtothepublicISDNarenotexplicitlyidentifiedinthepresentdocument,howeversomeproceduresareapplicableonlytotheTreferencepoint.ThepresentdocumentdoesnotspecifytheadditionalprotocolrequirementswheretheserviceisprovidedtotheuserviaatelecommunicationnetworkthatisnotanISDN.Abasictelecommunicationserviceisafundamentaltypeofservice.Itformsthebasisonwhichsupplementaryservicesmaybeadded.NOTE2:Specificrequirementsofindividualcircuit-modebasictelecommunicationservicesarenotcoveredinthepresentdocument.However,ETR018/EG201018givesguidanceontheuseofservicespecificinformationelementstoimplementindividualbasictelecommunicationservices.FurtherpartsofthepresentdocumentspecifytheSpecificationandDescriptionLanguage(SDL)diagrams,themethodoftesting,anddetailedapplicationspecificrequirementstodetermineconformancebasedonthepresentdocument.Thepresentdocumentisapplicabletoequipmentsupportingcircuit-modeon-demandbasictelecommunicationservices,tobeattachedateithersideofaTreferencepointorcoincidentSandTreferencepointwhenusedasanaccesstothepublicISDN.ReferencesThefollowingdocumentscontainprovisionswhich,throughreferenceinthistext,constituteprovisionsofthepresentdocument.•Referencesareeitherspecific(identifiedbydateofpublication,editionnumber,versionnumber,etc.)ornon-specific.•Foraspecificreference,subsequentrevisionsdonotapply.•Foranon-specificreference,thelatestversionapplies.•Anon-specificreferencetoanETSshallalsobetakentorefertolaterversionspublishedasanENwiththesamenumber.[87]ITU-TRecommendationH.245(1998):"Controlprotocolformultimediacommunication".[88]ITU-TRecommendationF.711(1993):"AudiographicconferenceteleserviceforISDN".[89]ITU-TRecommendationF.720(1992):"Videotelephonyservices-General".[90]ITU-TRecommendationH.223(1996):"Multiplexingprotocolforlowbitratemultimediacommunication".SIST EN 300 403-1 V1.3.2:2005
ETSIETSIEN300403-1V1.3.2(1999-11)5[91]ITU-TRecommendationI.112(1993):"VocabularyoftermsforISDNs".[92]CCITTRecommendationI.130(1988):"MethodforcharacterizationoftelecommunicationservicessupportedbyanISDNandnetworkcapabilitiesofanISDN".[93]ITU-RecommendationI.140(1993):"AttributetechniqueforthecharacterizationoftelecommunicationservicessupportedbyanISDNandnetworkcapabilitiesofanISDN".[94]ITU-TRecommendationI.210(1993):"PrinciplesoftelecommunicationservicessupportedbyanISDNandthemeansusedtodescribethem".[95]ITU-TRecommendationI.411(1993):"ISDNuser-networkinterfaces-Referenceconfigurations".[96]CCITTRecommendationQ.9(1988):"Vocabularyofswitchingandsignallingterms".[97]ITU-TRecommendationV.34(1994):"Amodemoperatingatdatasignallingratesofupto28800bit/sforuseonthegeneralswitchedtelephonenetworkandonleasedpoint-to-point2-wiretelephone-typecircuits".[98]ETS300007:"IntegratedServicesDigitalNetwork(ISDN);Supportofpacket-modeterminalequipmentbyanISDN".[99]ETS300011:"IntegratedServicesDigitalNetwork(ISDN);Primaryrateuser-networkinterface;Layer1specificationandtestprinciples".[100]ETS300012:"IntegratedServicesDigitalNetwork(ISDN);Basicuser-networkinterface;Layer1specificationandtestprinciples".[101]ETS300058-1:"IntegratedServicesDigitalNetwork(ISDN);CallWaiting(CW)supplementaryservice;DigitalSubscriberSignallingSystemNo.one(DSS1)protocol;Part1:Protocolspecification".[102]ETS300092-1:"IntegratedServicesDigitalNetwork(ISDN);CallingLineIdentificationPresentation(CLIP)supplementaryservice;DigitalSubscriberSignallingSystemNo.one(DSS1)protocol;Part1:Protocolspecification".[103]ETS300093-1:"IntegratedServicesDigitalNetwork(ISDN);CallingLineIdentificationRestriction(CLIR)supplementaryservice;DigitalSubscriberSignallingSystemNo.one(DSS1)protocol;Part1:Protocolspecification".[104]ETS300122-1:"IntegratedServicesDigitalNetwork(ISDN);Generickeypadprotocolforthesupportofsupplementaryservices;DigitalSubscriberSignallingSystemNo.one(DSS1)protocol;Part1:Protocolspecification".[105]EN300196-1(V1.2):"IntegratedServicesDigitalNetwork(ISDN);Genericfunctionalprotocolforthesupportofsupplementaryservices;DigitalSubscriberSignallingSystemNo.one(DSS1)protocol;Part1:Protocolspecification".[106]ETS300207-1:"IntegratedServicesDigitalNetwork(ISDN);Diversionsupplementaryservices;DigitalSubscriberSignallingSystemNo.one(DSS1)protocol;Part1:Protocolspecification".[107]ETS300286-1:"IntegratedServicesDigitalNetwork(ISDN);User-to-UserSignalling(UUS)supplementaryservice;DigitalSubscriberSignallingSystemNo.one(DSS1)protocol;Part1:Protocolspecification".[108]ETS300383:"IntegratedServicesDigitalNetwork(ISDN);FiletransferovertheISDN;EUROFILEtransferprofile".[109]ETS300388:"IntegratedServicesDigitalNetwork(ISDN);FileTransferAccess&Management(FTAM)overISDNbasedonsimplefiletransferprofile".[110]ETS300402-1:"IntegratedServicesDigitalNetwork(ISDN);DigitalSubscriberSignallingSystemNo.one(DSS1)protocol;Datalinklayer;Part1:Generalaspects[ITU-TRecommendationQ.920(1993),modified]".SIST EN 300 403-1 V1.3.2:2005
ETSIETSIEN300403-1V1.3.2(1999-11)6[111]ETS300402-2:"IntegratedServicesDigitalNetwork(ISDN);DigitalSubscriberSignallingSystemNo.one(DSS1)protocol;Datalinklayer;Part2:Generalprotocolspecification[ITU-TRecommendationQ.921(1993),modified]".[112]ETS300403-2:"IntegratedServicesDigitalNetwork(ISDN);DigitalSubscriberSignallingSystemNo.one(DSS1)protocol;Signallingnetworklayerforcircuit-modebasiccallcontrol;Part2:SpecificationandDescriptionLanguage(SDL)diagrams".[113]ETS300485:"IntegratedServicesDigitalNetwork(ISDN);DefinitionandusageofcauseandlocationinDigitalSubscriberSignallingSystemNo.one(DSS1)andSignallingSystemNo.7ISDNUserPart(ISUP)[ITU-TRecommendationQ.850(1993),modified]".NOTE:ThereferenceslistedinthepresentdocumentareacontinuationofpublicationsreferencedinITU-TRecommendationQ.931.DefinitionsForthepurposesofthepresentdocument,thefollowingdefinitionsapply,togetherwiththosegiveninthereferencedpublications:accesschannel;channel:seeCCITTRecommendationQ.9[96],definition0008B-channel:64kbit/schannelaccompaniedbytimingintendedtocarryawidevarietyofuserinformationstreams.AB-channeldoesnotcarrysignallinginformationforcircuitswitchingbytheISDNbasicaccess:seeCCITTRecommendationQ.9[96],definition1551basicservice;basictelecommunicationservice:seeCCITTRecommendationQ.9[96],definition7018call:seeCCITTRecommendationQ.9[96],definition2201callcontrolmessage:messageasdefinedinsubclause3.1ofthepresentdocument,whichonsendingorreceiptcausesachangeofthecallstateateitherthenetworkortheuser;andalsoPROGRESSandINFORMATIONmessagescallestablishment;connectionestablishment:seeCCITTRecommendationQ.9[96],definition2207callreference:identifierofasignallingtransaction.Thesignallingtransactionmayeitherbebearerrelated,inwhichcasethesignallingtransactioncanbeusedtocontrolthatbearer,orbearerindependent,inwhichcasethereisnobearerassociatedwiththatsignallingtransaction.Allsignallingtransactionsinthepresentdocumentarebearerrelatedexceptthoseassociatedwiththeglobalcallreference.Wherethereisonlyonebearerrequiredforacall,thenthecallreferenceoftheassociatedbearerrelatedsignallingtransactionmightbeusedtoidentifythecall.Inthepresentdocument,thereisonlyonebearerforeachcallcallstate:stateasdefinedinsubclause2.1ofthepresentdocument,foreithertheusersideornetworksideasappropriate.Acallstatemayexistforeachcallreferencevalue(andatthenetworksideforeachadditionalrespondingCEIintheincomingcallstates)circuitswitched;circuitswitching:seeCCITTRecommendationQ.9[96],definition1125comprehensionrequired:requirementthatthecodingstructureandmeaningofaninformationelementshallbeunderstoodbyitsreceiverforthemessagetobeprocessed.Aspecificrangeofvaluesforinformationelementidentifiersisprovidedforthoseinformationelementsforwhichcomprehensionisrequiredconnection:seeCCITTRecommendationQ.9[96],definition0011.Inthepresentdocument,thetermistakentoincludeabeareranditsassociatedcontrolsignallingD-channel:channelprimarilyintendedtocarrysignallinginformationforcircuitswitchingbytheISDNdatalinkconnectionendpointidentifier:identifierusedbyalayer3protocolentitytoaddressitspeerentitydummycallreference:callreferencevalueofoneoctetlengthencodedas"00000000"enblocreceiving:procedure,usedincallestablishmentofanincomingcall,toenablethenetworktosendcalledpartynumberdigitstotheuserinasinglemessageSIST EN 300 403-1 V1.3.2:2005
ETSIETSIEN300403-1V1.3.2(1999-11)7enblocsending:procedure,usedincallestablishmentofanoutgoingcall,toenabletheusertosendcalledpartynumberdigitstothenetworkinasinglemessageglobalcallreference:Callreferenceinformationelementwithacallreferencevalueofzero.Thelengthofthecallreferencevalueisencodedinthefirstoctetoftheinformationelement.TheGlobalcallreferenceidentifiesallcallreferencescurrentlyassociatedwiththeappropriatedatalinkconnectionendpointidentifierIncoming(call):callincomingtotheusersideoftheinterfaceIntegratedServicesDigitalNetwork(ISDN):seeITU-TRecommendationI.112[91],definition308interface:seeCCITTRecommendationQ.9[96],definition4001NetworkServiceAccessPoint(NSAP)address;OSINSAPaddress:seeCCITTRecommendationQ.9[96],definition2083network:DSS1protocolentityatthenetworksideoftheuser-networkinterfaceondemand:seeITU-TRecommendationI.140[93],annexA,clauseA.2OpenSystemInterconnection(OSI):conceptofinterconnectingsystemsinaccordancewiththearchitecturedescribedintheOpenSystemInterconnectionReferencemodel(CCITTRecommendationX.200[78])outgoing(call):calloutgoingfromtheusersideoftheinterfaceoverlapreceiving:procedure,usedincallestablishmentofanincomingcall,toenablethenetworktosendcalledpartynumberdigitstotheuserinsuccessivemessages,asandwhentheyaremadeavailablefromtheremotenetworkoverlapsending:procedure,usedincallestablishmentofanoutgoingcall,toenabletheusertosendcalledpartynumberdigitstothenetworkinsuccessivemessages,asandwhentheyaremadeavailablebytheuserpoint-to-multipointconfiguration;multipointterminalconfiguration;multipointconfiguration:terminalconfigurationinwhichthereismorethanonesignallingentitypoint-to-multipointdatalink;broadcastdatalink:datalinkconnectionwiththecapabilityofsupportingmorethantwoconnectionendpointspoint-to-pointconfiguration;single-pointterminalconfiguration;single-pointconfiguration:terminalconfigurationinwhichthereisonesignallingentitypoint-to-pointdatalink:datalinkonwhichaframeisdirectedtoasingleendpointprimaryrateaccess:seeCCITTRecommendationQ.9[96],definition1552service;telecommunicationservice:seeITU-TRecommendationI.112[91],definition201supplementaryservice:seeITU-TRecommendationI.210[94],subclause2.4user:DSS1protocolentityattheusersideoftheuser-networkinterfaceSIST EN 300 403-1 V1.3.2:2005
ETSIETSIEN300403-1V1.3.2(1999-11)8ThroughoutthetextofITU-TRecommendationQ.931Replacereferencesthroughoutthetextasshownbelow.ReferenceinITU-TRecommendationQ.931ModifiedreferenceITU-TRecommendationI.430[46]ETS300012[100]ITU-TRecommendationI.431[27]ETS300011[99]ITU-TRecommendationQ.850[67]ETS300485[113]ITU-TRecommendationQ.920[45]ITU-TRecommendationQ.920asmodifiedbyETS300402-1[110]ITU-TRecommendationQ.921[3]ITU-TRecommendationQ.921asmodifiedbyETS300402-2[111]ITU-TRecommendationQ.931ITU-TRecommendationQ.931asmodifiedbythepresentdocumentITU-TRecommendationQ.951[85],clause3ETS300092-1[102]ITU-TRecommendationQ.951[85],clause4ETS300093-1[103]ITU-TRecommendationQ.952[86]ETS300207-1[106]ITU-TRecommendationQ.953[84],clause1ETS300058-1[101]ITU-TRecommendationQ.957[54],clause1ETS300286-1[107]Pages1and2,clause2Replacethesecondparagraphby:Inthesubclauseswhichfollow,statesaredefinedforcircuitswitchedcallsinsubclause2.1(callstates)andfortheinterfaceinsubclause2.4(globalcallreferencestates).Replacethethreelastparagraphsby:Adetaileddescriptionoftheproceduresforcallcontrolisgiveninclause5intermsof:a)themessagesdefinedinclause3whicharetransferredacrosstheuser-networkinterface;b)theinformationprocessingandactionsthattakeplaceattheusersideandthenetworkside.DetailedSDLdiagramsforcallcontrolofcircuitswitchedcallsarecontainedinETS300403-2[112].Page2,subclause2.1,lastparagraphDeletethelastparagraphreferringtoannexD.Pages4to6,subclause2.2Deletesubclause2.2andallofitssubclauses.Thebasicpacket-modeaccessconnectioncontrolstatesforaccesstotheISDNvirtualbearerservicearedefinedinETS300007[98]andareoutsidethescopeofthepresentdocument.Pages6to8,subclause2.3Deletesubclause2.3andallofitssubclauses.Temporarysignallingconnectionsareoutsidethescopeofthepresentdocument.Page8,subclause2.4,lastparagraphReplacethelastparagraphby:Theglobalcallreferenceshallbehandledindependentlyforincomingandoutgoingsides,i.e.twoindependentstatemachinesinanentityshallbereferencedbytheglobalcallreference.SIST EN 300 403-1 V1.3.2:2005
ETSIETSIEN300403-1V1.3.2(1999-11)9Page8,subclause2.4.1.1,subclauseheadingReplacethesubclauseheadingbythefollowing:2.4.1.1RestartNull(Rest0)Page9,subclause2.4.2.1,subclauseheadingReplacethesubclauseheadingbythefollowing:2.4.2.1RestartNull(Rest0)Page9,clause3,note1Deletethelastsentence"AnnexD.interfaces".Page10,table3-1/Q.931IncludeSEGMENTasamessageintheMiscellaneousmessagespartoftable3-1/Q.931withareferencetosubclause3.5.1.Page11,table3-2/Q.931Modifytable3-2/Q.931asfollows:Messagetype:ALERTINGSignificance:globalDirection:bothInformationelementReferenceDirectionTypeLengthProtocoldiscriminator4.2bothM1Callreference4.3bothM2-3Messagetype4.4bothM1Bearercapability4.5bothO(note1)4-12Channelidentification4.5both(note2)u→nO(note3)2-34Progressindicator4.5bothO(note4)2-4Display4.5n→uO(note5)2-82(note6)Signal4.5n→uO(note7)2-3Highlayercompatibility4.5bothO(note8)2-5NOTE1:TheBearercapabilityinformationelementisincludedwhentheproceduresofsubclause5.11forbearercapabilityselectionapply.Whenpresent,progressdescription#5"interworkinghasoccurredandhasresultedinatelecommunicationservicechange"shallalsobepresent.NOTE2:Includedinthenetwork-to-userdirectionforsupportoftheproceduresinannexD.Void.NOTE3:MandatoryifthismessageisthefirstmessageinresponsetoSETUP,unlesstheuseracceptstheB-channelindicatedintheSETUPmessage.NOTE4:Includedintheeventofinterworking.Includedinthenetwork-to-userdirectioninconnectionwiththeprovisionofin-bandinformation/patterns.Includedintheuser-to-networkdirectioninconnectionwiththeprovisionofin-bandinformation/patternsifannexKisimplementedorinaccordancewiththeproceduresofsubclause5.11.3andsubclause5.12.3.NOTE5:Includedifthenetworkprovidesinformationthatcanbepresentedtotheuser.NOTE6:Theminimumlengthis2octets;themaximumlengthisnetworkdependentandiseither34or82octets.NOTE7:Includedifthenetworkoptionallyprovidesinformationdescribingtonesoralertingsignals.Void.NOTE8:TheHighlayercompatibilityinformationelementisincludedwhentheproceduresofsubclause5.12forhighlayercompatibilityselectionapply.Whenpresent,progressdescription#5,"interworkinghasoccurredandhasresultedinatelecommunicationservicechange",shallalsobepresent.SIST EN 300 403-1 V1.3.2:2005
ETSIETSIEN300403-1V1.3.2(1999-11)10Page12,table3-3/Q.931Modifytable3-3/Q.931asfollows:Messagetype:CALLPROCEEDINGSignificance:localDirection:bothInformationelementReferenceDirectionTypeLengthProtocoldiscriminator4.2bothM1Callreference4.3bothM2-3Messagetype4.4bothM1Bearercapability4.5bothO(note5)4-12Channelidentification4.5bothO(note1)2-34Progressindicator4.5bothO(note2)2-4Display4.5n→uO(note3)2-82(note4)Highlayercompatibility4.5bothO(note6)2-5NOTE1:Mandatoryinthenetwork-to-userdirectionifthismessageisthefirstmessageinresponsetoSETUP.Mandatoryintheuser-to-networkdirectionifthismessageisthefirstmessageinresponsetoSETUP,unlesstheuseracceptstheB-channelindicatedintheSETUPmessage.NOTE2:Includedintheeventofinterworking.Includedinthenetwork-to-userdirectioninconnectionwiththeprovisionofin-bandinformation/patterns.Includedintheuser-to-networkdirectioninconnectionwiththeprovisionofin-bandinformation/patternsifannexKisimplementedorinaccordancewiththeproceduresofsubclause5.11.3andsubclause5.12.3.NOTE3:Includedifthenetworkprovidesinformationthatcanbepresentedtotheuser.NOTE4:Theminimumlengthis2octets;themaximumlengthisnetworkdependentandiseither34or82octets.NOTE5:TheBearercapabilityinformationelementisincludedwhentheproceduresofsubclause5.11forbearercapabilityselectionapply.Whenpresent,progressdescription#5"interworkinghasoccurredandhasresultedinatelecommunicationservicechange",shallalsobepresent.NOTE6:TheHighlayercompatibilityinformationelementisincludedwhentheproceduresofsubclause5.12forhighlayercompatibilityselectionapply.Whenpresent,progressdescription#5,"interworkinghasoccurredandhasresultedinatelecommunicationservicechange",shallalsobepresent.SIST EN 300 403-1 V1.3.2:2005
ETSIETSIEN300403-1V1.3.2(1999-11)11Page13,table3-4/Q.931Modifytable3-4/Q.931asfollows:Messagetype:CONNECTSignificance:globalDirection:bothInformationelementReferenceDirectionTypeLengthProtocoldiscriminator4.2bothM1Callreference4.3bothM2-3Messagetype4.4bothM1Bearercapability4.5bothO(note1)4-12Channelidentification4.5both(note2)u→nO(note3)2-34Progressindicator4.5bothO(note4)2-4Display4.5n→uO(note5)2-82(note6)Date/time4.6n→uO(note7)2-8Signal4.5n→uO(note8)2-3Lowlayercompatibility4.5bothO(note9)2-18Highlayercompatibility4.5bothO(note10)2-5NOTE1:TheBearercapabilityinformationelementisincludedwhentheproceduresofsubclause5.11forbearercapabilityselectionapply.NOTE2:Includedinthenetwork-to-userdirectionforsupportoftheproceduresinannexD.Void.NOTE3:MandatoryifthismessageisthefirstmessageinresponsetoSETUP,unlesstheuseracceptstheB-channelindicatedintheSETUPmessage.NOTE4:Includedintheeventofinterworkingorinconnectionwiththeprovisionofin-bandinformation/patterns.NOTE5:Includedifthenetworkprovidesinformationthatcanbepresentedtotheuser.NOTE6:Theminimumlengthis2octets;themaximumlengthisnetworkdependentandiseither34or82octets.NOTE7:Asanetworkoption,maybeincludedtoprovidedateandtimeinformationtothecallinguserforallcallsorforcallsinvolvingspecifictelecommunicationservices.NOTE8:Includedifthenetworkoptionallyprovidesinformationdescribingtones.Void.NOTE9:Includedintheuser-to-networkdirectionwhentheansweringuserwantstoreturnlowlayercompatibilityinformationtothecallinguser.Includedinthenetwork-to-userdirectioniftheuserawardedthecallincludedaLowlayercompatibilityinformationelementintheCONNECTmessage.Optionallyincludedforlowlayercompatibilitynegotiation,butsomenetworksmaynottransportthisinformationelementtothecallinguser(seeannexJ).NOTE10:TheHighlayercompatibilityinformationelementisincludedwhentheproceduresofsubclause5.12forhighlayercompatibilityselectionapply.Page14,table3-5/Q.931Modifytable3-5/Q.931asfollows:Messagetype:CONNECTACKNOWLEDGESignificance:localDirection:bothInformationelementReferenceDirectionTypeLengthProtocoldiscriminator4.2bothM1Callreference4.3bothM2-3Messagetype4.4bothM1Display4.5n→uO(note1)2-82(note2)Signal4.5n→uO(note3)2-3NOTE1:Includedifthenetworkprovidesinformationthatcanbepresentedtotheuser.NOTE2:Theminimumlengthis2octets;themaximumlengthisnetworkdependentandiseither34or82octets.NOTE3:Includedifthenetworkoptionallyprovidesadditionalinformationdescribingtones.Void.SIST EN 300 403-1 V1.3.2:2005
ETSIETSIEN300403-1V1.3.2(1999-11)12Page15,table3-6/Q.931Modifytable3-6/Q.931asfollows:Messagetype:DISCONNECTSignificance:globalDirection:bothInformationelementReferenceDirectionTypeLengthProtocoldiscriminator4.2bothM1Callreference4.3bothM2-3Messagetype4.4bothM1Cause4.5bothM4-32Progressindicator4.5(note1)n→uO(note2)2-4Display4.5n→uO(note3)2-82(note4)Signal4.5n→uO(note5)2-3NOTE1:Includedinthenetwork-to-userdirectionifthenetworkprovidesin-bandtones.SeeannexDforusageintheuser-to-networkdirection.NOTE2:Includedbythenetworkifin-bandtonesareprovided.However,theusermayincludetheProgressIndicatorandprovidein-bandtones(seeannexD).Insuchcasesthenetworkwillignorethisinformationelementandwillnotconveythein-bandtones.NOTE3:Includedifthenetworkprovidesinformationthatcanbepresentedtotheuser.NOTE4:Theminimumlengthis2octets;themaximumlengthisnetworkdependentandiseither34or82octets.NOTE5:Includedifthenetworkoptionallyprovidesadditionalinformationdescribingtones.Void.SIST EN 300 403-1 V1.3.2:2005
ETSIETSIEN300403-1V1.3.2(1999-11)13Page16,table3-7/Q.931Modifytable3-7/Q.931asfollows:Messagetype:INFORMATIONSignificance:local(note1)Direction:bothInformationelementReferenceDirectionTypeLengthProtocoldiscriminator4.2bothM1Callreference4.3bothM2-3(note2)Messagetype4.4bothM1Sendingcomplete4.5bothO(note3)1Cause4.5n→uO(note9)2-32Display4.5n→uO(note4)2-82(note5)Keypadfacility4.5u→n(note10)O(note6)2-34Signal4.5n→uO(note7)2-3Calledpartynumber4.5u→nbothO(note8)2-23NOTE1:Thismessagehaslocalsignificance,butmaycarryinformationofglobalsignificance.NOTE2:Thismessagemaybesetwiththedummycallreferencedefinedin§4.3whenfeaturekeymanagementproceduresareused(seeRecommendationQ.932);otherwisetheminimumlengthin2octets.Void.NOTE3:Includediftheuseroptionallyindicatescompletionofoverlapsendingtothenetwork,orifthenetworkoptionallyindicatescompletionofoverlapreceivingtotheuser.NOTE4:Includedifthenetworkprovidesinformationthatcanbepresentedtotheuser.NOTE5:Theminimumlengthis2octets;themaximumlengthisnetworkdependentandiseither34or82octets.NOTE6:EithertheCalledpartynumberortheKeypadfacilityinformationelementisincludedbytheusertoconveycalledpartynumberinformationtothenetworkduringoverlapsending.TheKeypadfacilityinformationelementmayalsobeincludediftheuserwantstoconveyothercallestablishmentinformationtothenetworkortoconveysupplementaryserviceinformation(seeclause7).NOTE7:Includedifthenetworkoptionallyprovidesadditionalinformationdescribingtones.Void.NOTE8:EitherTheCalledpartynumberortheKeypadfacilityinformationelementisincludedbytheusertoconveycalledpartynumberinformationtothenetworkduringoverlapsending.TheCalledpartynumberinformationelementisincludedbythenetworktotransfercalledpartynumberinformationtotheuserduringoverlapreceiving.NOTE9:Asanetworkoption,maybeusedforstimulusoperationofsupplementaryservices.NOTE10:TheuseoftheKeypadfacilityinformationelementinthenetworktouserdirectionistoconveysupplementaryserviceinformationaspartofkeypadprotocolisanetworkoption.(Thisoptionismaintainedduetobackwardscompatibilityandisnotrecommendedforfutureuse.)Page17,table3-8/Q.931Modifytable3-8/Q.931asfollows:Messagetype:NOTIFYSignificance:accessDirection:bothInformationelementReferenceDirectionTypeLengthProtocoldiscriminator4.2bothM1Callreference4.3bothM2-3Messagetype4.4bothM1Bearercapability4.5n→uO(note1)2-12Notificationindicator4.5bothM3Display4.5n→uO(note2)2-82(note3)NOTE1:Includedbythenetworktoindicateachangeinbearercapability(seeannexL).Void.NOTE2:Includedifthenetworkprovidesinformationthatcanbepresentedtotheuser.NOTE3:Theminimumlengthis2octets;themaximumlengthisnetworkdependentandiseither34or82octets.SIST EN 300 403-1 V1.3.2:2005
ETSIETSIEN300403-1V1.3.2(1999-11)14Page18,table3-9/Q.931Modifytable3-9/Q.931asfollows:Messagetype:PROGRESSSignificance:globalDirection:bothInformationelementReferenceDirectionTypeLengthProtocoldiscriminator4.2bothM1Callreference4.3bothM2-3Messagetype4.4bothM1Bearercapability4.5bothO(note1)2-12Cause4.5bothO(note2)2-32Progressindicator4.5bothM4Display4.5n→uO(note3)2-82(note4)Highlayercompatibility4.5bothO(note5)2-5NOTE1:TheBearercapabilityinformationelementisincludedwhentheproceduresofsubclause5.11forbearercapabilityselectionapply.TheBearercapabilityinformationelementindicatesthebearerservicenowbeingusedforthecall.NOTE2:Includedbytheuserorthenetworktoprovideadditionalinformationconcerningtheprovisionofin-bandinformation/patterns.NOTE3:Includedifthenetworkprovidesinformationthatcanbepresentedtotheuser.NOTE4:Theminimumlengthis2octets;themaximumlengthisnetworkdependentandiseither34or82octets.NOTE5:TheHighlayercompatibilityinformationelementisincludedwhentheoptionalproceduresofsubclause5.12forhighlayercompatibilityselectionapply.TheHighlayercompatibilityinformationelementindicatesthehighlayercompatibilitynowbeingusedforthecall.Page19,table3-10/Q.931Modifytable3-10/Q.931asfollows:Messagetype:RELEASESignificance:local(note1)Direction:bothInformationelementReferenceDirectionTypeLengthProtocoldiscriminator4.2bothM1Callreference4.3bothM2-3Messagetype4.4bothM1Cause4.5bothO(note2)2-32Display4.5n→uO(note3)2-82(note4)Signal4.5n→uO(note5)2-3NOTE1:Thismessagehasalocalsignificance;however,itmaycarryinformationofglobalsignificancewhenusedasthefirstcallclearingmessage.NOTE2:Mandatoryinthefirstcallclearingmessage,includingwhentheRELEASEmessageissentasaresultofanerrorhandlingcondition.NOTE3:Includedifthenetworkprovidesinformationthatcanbepresentedtotheuser.NOTE4:Theminimumlengthis2octets;themaximumlengthisnetworkdependentandiseither34or82octets.NOTE5:Includedifthenetworkoptionallyprovidesadditionalinformationdescribingtones.Void.SIST EN 300 403-1 V1.3.2:2005
ETSIETSIEN300403-1V1.3.2(1999-11)15Page20,table3-11/Q.931Modifytable3-11/Q.931asfollows:Messagetype:RELEASECOMPLETESignificance:local(note1)Direction:bothInformationelementReferenceDirectionTypeLengthProtocoldiscriminator4.2bothM1Callreference4.3bothM2-3Messagetype4.4bothM1Cause4.5bothO(note2)2-32Display4.5n→uO(note3)2-82(note4)Signal4.5n→uO(note5)2-3NOTE1:Thismessagehasalocalsignificance;however,itmaycarryinformationofglobalsignificancewhenusedasthefirstcallclearingmessage.NOTE2:Mandatoryinthefirstcallclearingmessage,includingwhentheRELEASECOMPLETEmessageissentasaresultofanerrorhandlingcondition.NOTE3:Includedifthenetworkprovidesinformationthatcanbepresentedtotheuser.NOTE4:Theminimumlengthis2octets;themaximumlengthisnetworkdependentandiseither34or82octets.NOTE5:Includedifthenetworkoptionallyprovidesadditionalinformationdescribingtones.Void.Page20,table3-12/Q.931Modifytable3-12/Q.931asfollows:Messagetype:RESUMESignificance:localDirection:usertonetworkInformationelementReferenceDirectionTypeLengthProtocoldiscriminator4.2u→nM1Callreference4.3u→nM2-3Messagetype4.4u→nM1Callidentity4.5u→nO(note2)2-10NOTE:IncludedwhentheSUSPENDmessageusedtosuspendthecallincludedaCallidentityinformationelement.Page21,table3-13/Q.931Modifytable3-13/Q.931asfollows:Messagetype:RESUMEACKNOWLEDGESignificance:localDirection:networktouserInformationelementReferenceDirectionTypeLengthProtocoldiscriminator4.2n→uM1Callreference4.3n→uM2-3Messagetype4.4n→uM1Channelidentification4.5n→uM3-34Display4.5n→uO(note1)2-82(note2)NOTE1:Includedifthenetworkprovidesinformationthatcanbepresentedtotheuser.NOTE2:Theminimumlengthis2octets;themaximumlengthisnetworkdependentandiseither34or82octets.SIST EN 300 403-1 V1.3.2:2005
ETSIETSIEN300403-1V1.3.2(1999-11)16Page21,table3-14/Q.931Modifytable3-14/Q.931asfollows:Messagetype:RESUMEREJECTSignificance:localDirection:networktouserInformationelementReferenceDirectionTypeLengthProtocoldiscriminator4.2n→uM1Callreference4.3n→uM2-3Messagetype4.4n→uM1Cause4.5n→uM4-32Display4.5n→uO(note1)2-82(note2)NOTE1:Includedifthenetworkprovidesinformationthatcanbepresentedtotheuser.NOTE2:Theminimumlengthis2octets;themaximumlengthisnetworkdependentandiseither34or82octets.SIST EN 300 403-1 V1.3.2:2005
ETSIETSIEN300403-1V1.3.2(1999-11)17Pages22and23,table3-15/Q.931Modifytable3-15/Q.931asfollows:Messagetype:SETUPSignificance:globalDirection:bothInformationelementReferenceDirectionTypeLengthProtocoldiscriminator4.2bothM1Callreference4.3bothM2-3Messagetype4.4bothM1Sendingcomplete4.5bothO(note1)1Repeatindicator4.5bothO(note2)1Bearercapability4.5bothM(note3)4-12Channelidentification4.5bothO(note4)2-34Progressindicator4.5bothO(note5)2-4Networkspecificfacilities4.5bothO(note6)2-*Display4.5n→uO(note7)2-82(note8)Keypadfacility4.5u→n(note20)O(note9)2-34Signal4.5n→uO(note10)2-3Callingpartynumber4.5bothO(note11)2-24Callingpartysubaddress4.5bothO(note12)2-23Calledpartynumber4.5bothO(note13)2-23Calledpartysubaddress4.5bothO(note14)2-23Transitnetworkselection4.5u→nO(note15)2-*Repeatindicator4.5bothO(note16)1Lowlayercompatibility4.5bothO(note17)2-18Highlayercompatibility4.5bothO(note18)2-5Date/Time4.5n->uO(note19)2-8NOTE1:IncludediftheuserorthenetworkoptionallyindicatesthatallinformationnecessaryforcallestablishmentisincludedintheSETUPmessage.NOTE2:TheRepeatindicatorinformationelementisincludedimmediatelybeforethefirstBearercapabilityinformationelementwhenthebearercapabilitynegotiationprocedureisused(seeannexL).Void.NOTE3:Mayberepeatedifthebearercapabilitynegotiationprocedureisused(seeannexL).Forbearercapabilitynegotiation,twoBearercapabilityinformationelementsmaybeincludedindescendingorderofpriority,i.e.highestpriorityfirst.AlthoughsupportofmultipleBearercapabilityinformationelementsmaynotbesupportedonallnetworks,onnetworksthatdosupportit,andthroughsuitablesubscriptionarrangements,twoBearercapabilityinformationelementsmaybeincluded(seesubclause5.11).WhentheyarenotprecededbyaRepeatindicatorinformationelementtheyareincludedinascendingorderofpriority.NOTE4:Mandatoryinthenetwork-to-userdirection.Includedintheuser-to-networkdirectionwhentheuserwantstoindicateachannel.Ifnotincluded,itsabsenceisinterpretedas"anychannelacceptable".NOTE5:Includedintheeventofinterworkingorinconnectionwiththeprovisionofin-bandinformation/patterns.NOTE6:Includedbythecallinguserorthenetworktoindicatenetworkspecificfacilitiesinformation(seeannexE).NOTE7:Includedifthenetworkprovidesinformationthatcanbepresentedtotheuser.NOTE8:Theminimumlengthis2octets;themaximumlengthisnetworkdependentandiseither34or82octets.NOTE9:EithertheCalledpartynumberortheKeypadfacilityinformationelementisincludedbytheusertoconveycalledpartynumberinformationtothenetwork.TheKeypadfacilityinformationelementmayalsobeincludedbytheusertoconveyothercallestablishmentinformationtothenetworksupplementaryserviceinformation.NOTE10:Includedifthenetworkoptionallyprovidesadditionalinformationdescribingtones.Void.NOTE11:Maybeincludedbythecallinguserorthenetworktoidentifythecallinguser.Notincludedforbasiccallcontrol,butmaybeincludedforsomesupplementaryservices.NOTE12:Includedintheuser-to-networkdirectionwhenthecallinguserwantstoindicatethecallingpartysubaddress.Notincludedinthenetwork-to-userdirectionforbasiccallcontrol,butmaybeincludedforsomesupplementaryservices.SIST EN 300 403-1 V1.3.2:2005
ETSIETSIEN300403-1V1.3.2(1999-11)18NOTE13:EitherTheCalledpartynumberortheKeypadfacilityinformationelementisincludedbytheusertoconveycalledpartynumberinformationtothenetwork.TheCalledpartynumberinformationelementisincludedbythenetworkwhencalledpartynumberinformationisconveyedtotheuser.NOTE14:Includedintheuser-to-networkdirectionwhenthecallinguserwantstoindicatetheCalledpartysubaddress.Includedinthenetwork-to-userdirectionifthecallinguserincludedaCalledpartysubaddressinformationelementintheSETUPmessage.NOTE15:Includedbythecallingusertoselectaparticulartransitnetwork(seeannexC).NOTE16:IncludedwhentwoormoreLowlayercompatibilityinformationelementsareincludedforlowlayercompatibilitynegotiation.Void.NOTE17:Includedintheuser-to-networkdirectionwhenthecallinguserwantstopasslowlayercompatibilityinformationtothecalleduser.Includedinthenetwork-to-userdirectionifthecallinguserincludedaLowlayercompatibilityinformationelementintheSETUPmessage.Two,threeorfourinformationelementsmaybeincludedindescendingorderofpriority,i.e.highestpriorityfirst,ifthelowlayercompatibilitynegotiationproceduresareused(seeannexJ).NOTE18:Includedintheuser-to-networkdirectionwhenthecallinguserwantstopasshighlayercompatibilityinformationtothecalleduser.Includedinthenetwork-to-userdirectionifthecallinguserincludedaHighlayercompatibilityinformationelementintheSETUPmessage.AlthoughsupportofmultipleHighlayercompatibilityinformationelementsmaynotbesupportedonallnetworks,onnetworksthatdosupportit,andthroughsuitablesubscriptionarrangements,twoHighlayercompatibilityinformationelementsmaybeincluded(seesubclause5.12).WhentheyarenotprecededbyaRepeatindicatorinformationelement,theyareincludedinascendingorderofpriority.NOTE19:Asanetworkoption,maybeincludedtoprovidedateandtimeinformationtothecalleduserforallcallsorforcallsinvolvingspecifictelecommunicationservices.NOTE20:TheuseoftheKeypadfacilityinformationelementinthenetworktouserdirectionistoconveysupplementaryserviceinformationaspartofkeypadprotocolisanetworkoption.(Thisoptionismaintainedduetobackwardscompatibilityandisnotrecommendedforfutureuse.)Page24,table3-16/Q.931Modifytable3-16/Q.931asfollows:Messagetype:SETUPACKNOWLEDGESignificance:localDirection:bothInformationelementReferenceDirectionTypeLengthProtocoldiscriminator4.2bothM1Callreference4.3bothM2-3Messagetype4.4bothM1Channelidentification4.5bothO(note1)2-34Progressindicator4.5bothO(note2)2-4Display4.5n→uO(note3)2-82(note4)Signal4.5n→uO(note5)2-3NOTE1:Mandatoryinallcases,exceptwhentheuseracceptsthespecificB-channelindicatedintheSETUPmessage.NOTE2:Includedintheeventofinterworkingorinconnectionwiththeprovisionofin-bandinformation/patterns.NOTE3:Includedifthenetworkprovidesinformationthatcanbepresentedtotheuser.NOTE4:Theminimumlengthis2octets;themaximumlengthisnetworkdependentandiseither34or82octets.NOTE5:Includedifthenetworkoptionallyprovidersinformationdescribingtones(e.g.activatedialtone).Void.SIST EN 300 403-1 V1.3.2:2005
ETSIETSIEN300403-1V1.3.2(1999-11)19Page25,table3-17/Q.931Modifytable3-17/Q.931asfollows:Messagetype:STATUSSignificance:localDirection:bothInformationelementReferenceDirectionTypeLengthProtocoldiscriminator4.2bothM1Callreference4.3bothM2-3Messagetype4.4bothM1Cause4.5bothM4-32Callstate4.5bothM3Display4.5n→uO(note1)2-82(note2)NOTE1:Includedifthenetworkprovidesinformationthatcanbepresentedtotheuser.NOTE2:Theminimumlengthis2octets;themaximumlengthisnetworkdependentandiseither34or82octets.Page26,table3-18/Q.931Modifytable3-18/Q.931asfollows:Messagetype:STATUSENQUIRYSignificance:localDirection:bothInformationelementReferenceDirectionTypeLengthProtocoldiscriminator4.2bothM1Callreference4.3bothM2-3Messagetype4.4bothM1Display4.5n→uO(note1)2-82(note2)NOTE1:Includedifthenetworkprovidesinformationthatcanbepresentedtotheuser.NOTE2:Theminimumlengthis2octets;themaximumlengthisnetworkdependentandiseither34or82octets.Page26,table3-19/Q.931Modifytable3-19/Q.931asfollows:Messagetype:SUSPENDSignificance:localDirection:usertonetworkInformationelementReferenceDirectionTypeLengthProtocoldiscriminator4.2u→nM1Callreference4.3u→nM2-3Messagetype4.4u→nM1Callidentity4.5u→nO(note)2-10NOTE:Includediftheuserlaterwantstoidentifythesuspendedcallexplicitly.SIST EN 300 403-1 V1.3.2:2005
ETSIETSIEN300403-1V1.3.2(1999-11)20Page27,table3-20/Q.931Modifytable3-20/Q.931asfollows:Messagetype:SUSPENDACKNOWLEDGESignificance:localDirection:networktouserInformationelementReferenceDirectionTypeLengthProtocoldiscriminator4.2n→uM1Callreference4.3n→uM2-3Messagetype4.4n→uM1Display4.5n→uO(note1)2-82(note2)NOTE1:Includedifthenetworkprovidesinformationthatcanbepresentedtotheuser.NOTE2:Theminimumlengthis2octets;themaximumlengthisnetworkdependentandiseither34or82octets.Page27,table3-21/Q.931Modifytable3-21/Q.931asfollows:Messagetype:SUSPENDREJECTSignificance:localDirection:networktouserInformationelementReferenceDirectionTypeLengthProtocoldiscriminator4.2n→uM1Callreference4.3n→uM2-3Messagetype4.4n→uM1Cause4.5n→uM4-32Display4.5n→uO(note1)2-82(note2)NOTE1:Includedifthenetworkprovidesinformationthatcanbepresentedtotheuser.NOTE2:Theminimumlengthis2octets;themaximumlengthisnetworkdependentandiseither34or82octets.Pages28to36,subclause3.2Deletesubclause3.2andallofitssubclauses.Themessagesforpacket-modeaccessconnectioncontrolaredefinedinETS300007[98]andareoutsidethescopeofthepresentdocument.Pages37to49,subclause3.3Deletesubclause3.3andallofitssubclauses.Itisoutsidethescopeofthepresentdocument.Page50,table3-48/Q.931IncludeSEGMENTasamessagewithareferencetosubclause3.5.1.SIST EN 300 403-1 V1.3.2:2005
ETSIETSIEN300403-1V1.3.2(1999-11)21Page50,table3-49/Q.931Modifytable3-49/Q.931asfollows:Messagetype:RESTARTSignificance:localDirection:bothInformationelementReferenceDirectionTypeLengthProtocoldiscriminator4.2bothM1Callreference4.3bothM(note1)2-3Messagetype4.4bothM1Channelidentification4.5bothO(note2)2-34Display4.5n→uO(note3)2-82(note4)Restartindicator4.5bothM3NOTE1:Thismessageissentwiththeglobalcallreferencedefinedinsubclause4.3.NOTE2:Includedwhennecessarytoindicatetheparticularchannel(s)toberestarted.NOTE3:Includedifthenetworkprovidestheinformationthatcanbepresentedtotheuser.NOTE4:Theminimumlengthis2octets;themaximumlengthisnetworkdependentandiseither34or82octets.Page51,table3-50/Q.931Modifytable3-50/Q.931asfollows:Messagetype:RESTARTACKNOWLEDGESignificance:localDirection:bothInformationelementReferenceDirectionTypeLengthProtocoldiscriminator4.2bothM1Callreference4.3bothM(note1)2-3Messagetype4.4bothM1Channelidentification4.5bothO(note2)2-34Display4.5n→uO(note3)2-82(note4)Restartindicator4.5bothM3NOTE1:Thismessageissentwiththeglobalcallreferencedefinedinsubclause4.3.NOTE2:Includedwhennecessarytoindicatetheparticularchannel(s)whichhavebeenrestarted.Mayberepeatedinthecaseofnon-associatedsignallingthatcontrolstwoormoreinterfaces.NOTE3:Includedifthenetworkprovidestheinformationthatcanbepresentedtotheuser.NOTE4:Theminimumlengthis2octets;themaximumlengthisnetworkdependentandiseither34or82octets.Page52,table3-51/Q.931Modifytable3-51/Q.931asfollows:Messagetype:STATUSSignificance:localDirection:bothInformationelementReferenceDirectionTypeLengthProtocoldiscriminator4.2bothM1Callreference4.3bothM(note1)2-3Messagetype4.4bothM1Cause4.5bothM4-32Callstate4.5bothM3Display4.5n→uO(note2)2-82(note3)NOTE1:Thismessageissentwiththeglobalcallreferencedefinedinsubclause4.3.NOTE2:Includedifthenetworkprovidesinformationthatcanbepresentedtotheuser.NOTE3:Theminimumlengthis2octets;themaximumlengthisnetworkdependentandiseither34or82octets.SIST EN 300 403-1 V1.3.2:2005
ETSIETSIEN300403-1V1.3.2(1999-11)22Page52Insertthefollowingnewsubclausebeforeclause4:3.5Messagesusedforthesegmentationprocedure3.5.1SegmentThismessageissentbytheuserorthenetworkwhentheoptionalsegmentationproceduredescribedinannexHisused.Seetable3-52.Table3-52:SEGMENTmessagecontentMessagetype:SEGMENTSignificance:localDirection:bothInformationelementReferenceDirectionTypeLengthProtocoldiscriminator4.2bothM1Callreference4.3bothM2-3Messagetype4.4bothM1Segmentedmessage4.5bothM4"Segment"(note1)annexHbothM(note2)NOTE1:Thesegmentmayconsistofapartofaninformationelement,aninformationelementorseveralinformationelements(seeannexH).NOTE2:ThemaximumlengthofthesegmentisN201minusthelengthofthemandatorypartoftheSEGMENTmessage(8or9octets).N201isdefinedinETS300402-2[111].Page52,clause4Insertthefollowingnoteattheendofclause4:NOTE:Throughoutthisclause,codepointsusedforbasiccallproceduresaredefined.Insomecases(e.g.inETSsforsupplementaryservicesandETSsforpacketmode)othercodepointsmaybeusedwhichinthepresentdocumentaremarkedas"Allothervaluesarereserved".Page53,subclause4.2Deletethenoteafterthefirstparagraph.Insertthefollowingnoteafterthesecondparagraph:NOTE:SeeETR189/EG201189forguidanceandreferencetovaluesusedbyotherprotocols.SIST EN 300 403-1 V1.3.2:2005
ETSIETSIEN300403-1V1.3.2(1999-11)23Page54,table4-1/Q931Modifytable4-1/Q.931asfollows:Bits8765432100000000through00000111Assignedforuser-to-usersignalling(seeETS300286-1[107])-notavailableforuseinthemessageprotocoldiscriminator00001000Q.931user-networkcallcontrolmessages00010000through00111111Reservedforothernetworklayerorlayer3protocols,includingRecommendationX.25[5](note1)01000000through01000111Nationaluse01001000through01001111reservedforETSIuse01010000through11111110reservedforothernetworklayerorlayer3protocols,includingRecommendationX.25[5](note1)Allothervaluesarereserved.NOTE1:ThesevaluesarereservedtodiscriminatetheseprotocoldiscriminatorsfromthefirstoctetofaX.25packetincludinggeneralformatidentifier.NOTE2:Thelistofvaluesinthistabledoesnotshowallofthevaluesthatmaybeinuse.Page54,subclause4.3Replacethesecondtofourthparagraphs"Thecallreference(.)oneortwooctets"by:Thecallreferenceisthesecondpartofeverymessage.Thecallreferenceiscodedasshowninfigure4-3/Q.931.Thelengthofthecallreferencevalueisindicatedinoctet1,bits1to4.ThemaximumlengthoftheCallreferenceinformationelementisthreeoctets.TheactionstakenbythereceiverarebasedonthenumericalvalueofthecallreferenceandareindependentofthelengthoftheCallreferenceinformationelement.Allnetworksandusersco
...