SIST EN 300 403-1 V1.3.2:2005

• 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
• ICS: 33.080 - Integrated Services Digital Network (ISDN)
• ICS: 35.100.30 - Network layer
• 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
• Ref Project: ETSI EN 300 403-1 V1.3.2 (1999-11) - 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]

SIST EN 300 403-1 V1.3.2:2005 is the Slovenian adoption of ETSI EN 300 403-1 for Integrated Services Digital Network (ISDN) DSS1 signalling. It specifies the signalling network layer for circuit-mode basic call control at the T reference point, or a coincident S/T reference point, for equipment that accesses the public ISDN. In practice, it tells implementers how call setup, alerting, clearing, restart, suspension, resumption and related information elements are coded and handled.

What does SIST EN 300 403-1 V1.3.2:2005 specify?

SIST EN 300 403-1 V1.3.2:2005 specifies stage three procedures and switching functions for circuit-mode on-demand basic telecommunication services over DSS1. It is the protocol specification part of a multi-part EN, and the companion Part 2 contains the SDL diagrams used with this part.

The document is for equipment on either side of the user-network interface when that equipment supports circuit-mode basic telecommunication services. It excludes packet-mode access connection control and other extensions that are handled in other documents.

Annex	What it covers
Annex B	Compatibility checking and address checking on receipt of SETUP
Annex C	Transit network selection
Annex D	In-band tones and announcements procedures
Annex E	Network specific facilities
Annex H	Optional segmentation procedure
Annex J	Low layer compatibility negotiation
Annex L	Bearer capability selection and related procedures
Annex ZA	Relevant differences from earlier ETS versions

What are the key requirements of SIST EN 300 403-1 V1.3.2:2005?

SIST EN 300 403-1 V1.3.2:2005 defines how basic call control messages are built, when they are used, and how the user and network react to them. The practical effect is that both sides must exchange the same message types, interpret the same information elements, and follow the same state changes.

Call setup and addressing

The SETUP procedures require the calling side to present the call information needed for call establishment. The document distinguishes en-bloc sending and overlap sending, and it ties these procedures to how called party digits are transferred and when call establishment can proceed.

Compatibility and address checking are mandatory before a user responds to SETUP. This matters because an addressed terminal must either accept the call, reject it with the specified clearing behaviour, or ignore it when it is not the addressed destination.

Channel selection is defined for point-to-point operation. The network can indicate a preferred channel, allow alternatives, or indicate that any available B-channel is acceptable, and the user must respond accordingly.

Clearing, restart and recovery

The document defines coordinated clearing for both user-initiated and network-initiated cases. The B-channel is disconnected, the call reference is released, and the opposite side responds with the matching clearing message so that both ends reach the idle state cleanly.

Restart is used to return channels or interfaces to an idle condition after failure, maintenance or other recovery needs. This is important in operation because a restart affects which channels may be reused and when.

The error-handling rules cover unexpected or unrecognized messages, missing mandatory information elements, and invalid information element contents. In practice, implementers need to return the appropriate status information, clear the call when required, and keep state machines consistent after faults.

Information element coding

The document defines the coding of core information elements such as Bearer capability, Channel identification, Cause, Call state, Display, Date/Time, High layer compatibility and Low layer compatibility. This is what makes interoperability possible: one network or terminal can parse the other side’s call-control information without ad hoc interpretation.

It also adds or updates code points in the modified Q.931 base text, including changes to the Date/Time information element and support for additional capability coding where the document requires it. That matters for implementation because these fields must match the revised protocol syntax exactly.

What terms does SIST EN 300 403-1 V1.3.2:2005 define?

• B-channel - A 64 kbit/s bearer channel used to carry user information, not signalling for circuit switching.
• D-channel - The channel primarily used for signalling information in ISDN circuit switching.
• Call reference - The identifier of a signalling transaction, used to associate messages with a call.
• Global call reference - A call reference with a zero call reference value, used to identify all call references associated with the relevant data link connection endpoint identifier.
• Call state - The state of a call on the user side or network side, as appropriate.
• En-bloc sending - A setup method where the called party number is sent in a single message.
• Overlap sending - A setup method where the called party number is sent in successive messages as digits become available.

Who uses SIST EN 300 403-1 V1.3.2:2005?

SIST EN 300 403-1 V1.3.2:2005 is used by ISDN terminal and network equipment developers, public network operators, and integrators of DSS1 signalling. It is also used by conformance test teams and labs because the document is tied to SDL diagrams, test-suite parts and protocol implementation conformance material.

Quality managers and buyers use it to check that an ISDN product supports the expected call-control behaviour at the interface point they need. Service providers use it when they have to match terminal behaviour, channel selection, clearing behaviour and supplementary signalling interactions.

What changed in SIST EN 300 403-1 V1.3.2:2005 from the previous edition?

SIST EN 300 403-1 V1.3.2:2005 is described as an extended and updated version of ETS 300 403-1 and ETS 300 102-1. The scope also states that it updates the Date/Time information element according to contribution TD 207 and the BC/LLC with new code points.

Annex ZA identifies the relevant differences between this version and the earlier standards.

Which standards are used with SIST EN 300 403-1 V1.3.2:2005?

This document references and relies on several companion standards and recommendations, including:

• ETS 300 402-1 - General aspects of the DSS1 data link layer.
• ETS 300 402-2 - General protocol specification for the DSS1 data link layer.
• ETS 300 403-2 - SDL diagrams for this protocol.
• ETS 300 007 - Packet-mode access connection control.
• ETS 300 011 / ETS 300 012 - Layer 1 specification and test principles for primary rate and basic access.
• EN 300 196-1 - Generic functional protocol for supplementary services.
• ETS 300 286-1 - User-to-User Signalling.
• ETS 300 485 - Cause and location usage in DSS1 and ISUP.

What does the SIST EN 300 403-1 V1.3.2:2005 document contain?

SIST EN 300 403-1 V1.3.2:2005 contains the protocol message definitions, coding tables, state procedures and error-handling rules needed to implement DSS1 basic call control. It includes tables for message content such as SETUP, ALERTING, CONNECT, DISCONNECT, RELEASE, RESTART, STATUS, SUSPEND and RESUME, plus the SEGMENT message used when optional segmentation applies.

The document also contains coding figures and tables for information elements such as Bearer capability, Channel identification, Cause, Call state, Date/Time, Display, High layer compatibility and Low layer compatibility. In practice, these are the parts engineers use for implementation, interoperability checks, and protocol conformance testing.

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.:[phone]Fax:[phone]SiretN°34862356200017-NAF742CAssociationàbutnonlucratifenregistréeàlaSous-PréfecturedeGrasse(06)N°7803/[e-mail]ETSIdeliverablecanbedownloadedfromhttp://www.etsi.orgIfyoufinderrorsinthepresentdocument,sendyourcommentto:[e-mail]Ideliverablemaybemadeavailableinmorethanoneelectronicversionorinprint.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
...