SIST EN 301 484-1 V1.1.1:2005

Integrated Services Digital Network (ISDN); Line Hunting (LH) supplementary service; Digital Subscriber Signalling System No. one (DSS1); Part 1: Protocol specification

The Line Hunting supplementary service enables calls to a single ISDN number to be offered to a free access in a group of basic accesses. The Line Hunting supplementary service is intended for use on accesses to which terminals are connected at the S/T references point

Digitalno omrežje z integriranimi storitvami (ISDN) – Dopolnilna storitev: iskanje voda v skupini (LH) – Protokol digitalne naročniške signalizacije št. 1 (DSS1) – 1. del: Specifikacija protokola

General Information

• Status: Published
• Publication Date: 31-Dec-2004
• ICS: 33.080 - Integrated Services Digital Network (ISDN)
• Technical Committee: SPN - Services and Protocols for Networks
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 01-Jan-2005
• Due Date: 01-Jan-2005
• Completion Date: 01-Jan-2005
• Ref Project: ETSI EN 301 484-1 V1.1.1 (2000-04) - Integrated Services Digital Network (ISDN); Line Hunting (LH) supplementary service; Digital Subscriber Signalling System No. one (DSS1); Part 1: Protocol specification

Standards Content (Sample)

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Integrated Services Digital Network (ISDN); Line Hunting (LH) supplementary service; Digital Subscriber Signalling System No. one (DSS1); Part 1: Protocol specification33.080Digitalno omrežje z integriranimi storitvami (ISDN)Integrated Services Digital Network (ISDN)ICS:Ta slovenski standard je istoveten z:EN 301 484-1 Version 1.1.1SIST EN 301 484-1 V1.1.1:2005en01-januar-2005SIST EN 301 484-1 V1.1.1:2005SLOVENSKI
STANDARD



SIST EN 301 484-1 V1.1.1:2005



ETSIEN301484-1V1.1.1(2000-04)EuropeanStandard(Telecommunicationsseries)IntegratedServicesDigitalNetwork(ISDN);LineHunting(LH)supplementaryservice;DigitalSubscriberSignallingSystemNo.one(DSS1);Part1:ProtocolspecificationSIST EN 301 484-1 V1.1.1:2005



ETSIETSIEN301484-1V1.1.1(2000-04)2ReferenceDEN/SPAN-05171-1KeywordsISDN,DSS1,supplementaryservice,LH,protocolImportantnoticeThisETSIdeliverablemaybemadeavailableinmorethanoneelectronicversionorinprint.Inanycaseofexistingorperceiveddifferenceincontentsbetweensuchversions,thereferenceversionisthePortableDocumentFormat(PDF).Incaseofdispute,thereferenceshallbetheprintingonETSIprintersofthePDFversionkeptonaspecificnetworkdrivewithinETSISecretariat.Usersofthisdocumentshouldbeawarethatthedocumentmaybesubjecttorevisionorchangeofstatus.InformationonthecurrentstatusofthisandotherETSIdocumentsisavailableathttp://www.etsi.org/tb/status/CopyrightNotificationNopartmaybereproducedexceptasauthorizedbywrittenpermission.Thecopyrightandtheforegoingrestrictionextendtoreproductioninallmedia.©EuropeanTelecommunicationsStandardsInstitute2000.Allrightsreserved.ETSIPostaladdressF-06921SophiaAntipolisCedex-FRANCEOfficeaddress650RoutedesLucioles-SophiaAntipolisValbonne-FRANCETel.:[phone]Fax:[phone]SiretN°34862356200017-NAF742CAssociationàbutnonlucratifenregistréeàlaSous-PréfecturedeGrasse(06)N°7803/[e-mail]ETSIdeliverablecanbedownloadedfromhttp://www.etsi.orgIfyoufinderrorsinthepresentdocument,sendyourcommentto:[e-mail] EN 301 484-1 V1.1.1:2005



ETSIETSIEN301484-1V1.1.1(2000-04)3ContentsIntellectualPropertyRights.4Foreword.41Scope.62References.63Definitions.74Abbreviations.85Description.86OperationalRequirements.96.1ProvisionandWithdrawal.96.2Requirementsontheoriginatingnetworkside.106.3Requirementsonthedestinationnetworkside.107Codingrequirements.107.1CodingoftheFacilityinformationelementcomponents.108StateDefinitions.129SignallingProceduresatthecoincidentSandTreferencepoints.129.1Activation,deactivationandinterrogation.129.1.1TemporaryHuntGroupwithdrawal.129.1.1.1Normaloperation.129.1.1.2Exceptionalprocedures.139.1.2CancellationofTemporaryHuntGroupwithdrawal.139.1.2.1Normaloperation.139.1.2.2Exceptionalprocedures.149.1.3Interrogation.149.1.3.1NormalOperation.149.1.3.2Exceptionalprocedures.159.2InvocationandOperation.159.2.1Normaloperation.159.2.2Exceptionalprocedures.159.3Notificationtouserofwithdrawalofanaccessfromahuntgroup.1610ProceduresforinterworkingwithprivateISDNs.1611Interactionswithothernetworks.1612Interactionwithothersupplementaryservices.1613Parametervalues(timers).1614Dynamicdescription(SDLdiagrams).16AnnexA(informative):Signallingflows.17History.19SIST EN 301 484-1 V1.1.1:2005



ETSIETSIEN301484-1V1.1.1(2000-04)4IntellectualPropertyRightsIPRsessentialorpotentiallyessentialtothepresentdocumentmayhavebeendeclaredtoETSI.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);LineHunting(LH)supplementaryservice;DigitalSubscriberSignallingSystemNo.one(DSS1),asidentifiedbelow:Part1:"Protocolspecification";Part2:"ProtocolImplementationConformanceStatement(PICS)proformaspecification";Part3:"TestSuiteStructureandTestPurposes(TSS&TP)specificationsfortheuser";Part4:"AbstractTestSuite(ATS)andpartialProtocolImplementationeXtraInformationforTesting(PIXIT)proformaspecificationfortheuser";Part5:"TestSuiteStructureandTestPurposes(TSS&TP)specificationforthenetwork";Part6:"AbstractTestSuite(ATS)andpartialProtocolImplementationeXtraInformationforTesting(PIXIT)proformaspecificationforthenetwork".InaccordancewithCCITTRecommendationI.130[7],thefollowingthreelevelstructureisusedtodescribethesupplementarytelecommunicationservicesasprovidedbyEuropeanpublictelecommunicationsoperatorsunderthepan-EuropeanISDN:-stage1:isanoverallservicedescription,fromtheuser'sstandpoint;-stage2:identifiesthefunctionalcapabilitiesandinformationflowsneededtosupporttheservicedescribedinstage1;and-stage3:definesthesignallingsystemprotocolsandswitchingfunctionsneededtoimplementtheservicedescribedinstage1.Thepresentdocumentdetailsthestage3aspects(signallingsystemprotocolsandswitchingfunctions)neededtosupporttheLineHuntingsupplementaryservice.Thestage1aspectsaredetailedindraftEN301479[1].Thestage2aspectsoftheLineHuntingsupplementaryservicehavenotbeenspecified.SIST EN 301 484-1 V1.1.1:2005



ETSIETSIEN301484-1V1.1.1(2000-04)5NationaltranspositiondatesDateofadoptionofthisEN:21April2000DateoflatestannouncementofthisEN(doa):31July2000DateoflatestpublicationofnewNationalStandardorendorsementofthisEN(dop/e):31January2001DateofwithdrawalofanyconflictingNationalStandard(dow):31January2001SIST EN 301 484-1 V1.1.1:2005



ETSIETSIEN301484-1V1.1.1(2000-04)61ScopeThepresentdocumentspecifiesthestagethreeoftheLineHunting(LH)supplementaryserviceforthepan-EuropeanIntegratedServicesDigitalNetwork(ISDN)asprovidedbytheEuropeanpublictelecommunicationsoperatorsattheTreferencepointorcoincidentSandTreferencepoint(asdefinedinITU-TRecommendationI.411[13])bymeansoftheDigitalSubscriberSystemNo.one(DSS1).Stagethreeidentifiestheprotocolproceduresandswitchingfunctionsneededtosupportatelecommunicationsservice(seeCCITTRecommendationI.130[7]).ThepresentdocumentdoesnotspecifytheadditionalprotocolrequirementswheretheserviceisprovidedtotheuserviaatelecommunicationsnetworkthatisnotanISDN.TheLHsupplementaryserviceenablescallstoasingleISDNnumbertobeofferedtoafreeaccessinagroupofaccessestowhichterminalsareconnected.Theprinciplesfortheselectionofafreechannelwithinanaccessareanetworkprovidermatteraspartofthebasiccallproceduresandsoareoutsidethescopeofthepresentdocument.TheLHserviceisapplicabletoallcircuit-switchedtelecommunicationserviceswiththeexceptionofservicesrequiringtheuseofmorethanoneB-channel.FurtherpartsofEN301484specifythemethodoftestingrequiredtoidentifyconformancetothepresentdocument.2ReferencesThefollowingdocumentscontainprovisionswhich,throughreferenceinthistext,constituteprovisionsofthepresentdocument.• Referencesareeitherspecific(identifiedbydateofpublication,editionnumber,versionnumber,etc.)ornon-specific.• Foraspecificreference,subsequentrevisionsdonotapply.• Foranon-specificreference,thelatestversionapplies.• Anon-specificreferencetoanETSshallalsobetakentorefertolaterversionspublishedasanENwiththesamenumber.[1]ETSIEN301479:"IntegratedServicesDigitalNetwork(ISDN);LineHunting(LH)supplementaryservice;ServiceDescription".[2]ETSIEN300195-1:"IntegratedServicesDigitalNetwork(ISDN);Supplementaryserviceinteractions;DigitalSubscriberSignallingSystemNo.one(DSS1)protocol;Part1:Protocolspecification".[3]ETSIEN300196-1:"IntegratedServicesDigitalNetwork(ISDN);Genericfunctionalprotocolforthesupportofsupplementaryservices;DigitalSubscriberSignallingSystemNo.one(DSS1)protocol;Part1:Protocolspecification".[4]ETSIEN300403-1:"IntegratedServicesDigitalNetwork(ISDN);DigitalSubscriberSignallingSystemNo.one(DSS1)protocol;Signallingnetworklayerforcircuit-modebasiccallcontrol;Part1:Protocolspecification[ITU-TRecommendationQ.931(1993),modified]".[5]ITU-TRecommendationI.112:"VocabularyoftermsforISDNs".[6]ITU-TRecommendationI.210:"PrinciplesoftelecommunicationservicessupportedbyanISDNandthemeanstodescribethem".[7]CCITTRecommendationI.130:"MethodforthecharacterizationoftelecommunicationservicessupportedbyanISDNandnetworkcapabilitiesofanISDN".SIST EN 301 484-1 V1.1.1:2005



ETSIETSIEN301484-1V1.1.1(2000-04)7[8]ETSIEN300089:"IntegratedServicesDigitalNetwork(ISDN);CallingLineIdentificationPresentation(CLIP)supplementaryservice;Servicedescription".[9]ITU-TRecommendationZ.100:"CCITTSpecificationanddescriptionlanguage(SDL)".[10]ITU-TRecommendationE.164:"Theinternationalpublictelecommunicationnumberingplan".[11]ITU-TRecommendationX.680:"Informationtechnology-AbstractSyntaxNotationOne(ASN.1):Specificationofbasicnotation".[12]ITU-TRecommendationX.880:"Informationtechnology-RemoteOperations:Concepts,modelandnotation".[13]ITU-TRecommendationI.411:"ISDNuser-networkinterfaces-Referenceconfigurations".[14]ITU-TRecommendationI.221:"Commonspecificcharacteristicsofservices".3DefinitionsForthepurposesofthepresentdocument,thefollowingtermsanddefinitionsapply:Access:generaltermusedinthepresentdocument,denotingbasicaccessesandasanetworkprovideroption,primaryrateaccessesBasicaccess:seeITU-TRecommendationI.112[5],subclause2.4,definition425Basiccallprocedures:proceduresbywhichacall(asaninstanceofabasictelecommunicationsservice)isestablishedandterminatedCyclichunting:selectionofafreeaccessalwaysstartsatthenextaccessaftertheoneusedlast,andfollowsafixedorder.Whenthelastaccessinthegroupisreached,thesearchcontinuesfromthebeginningofthegroupuntilallaccessesinthegrouphavebeensearched,orafreeaccessisfoundDefaultnumber:definedfortheCLIPserviceinEN300089[8]NOTE:Inordertoprovideconsistencyfromacustomerperspectivethesamedefaultnumbermaybeassociatedwithalltheaccessesthatgotoauserinstallation.InthissituationthedefaultnumberisaHuntGroupNumberandtheHuntGroupitrelatestocontainsalltheaccessesthatgotoauserinstallation.Freeaccess:accesstowhichthecallcanbeofferedwithoutexceedingthenumberofusedB-channelsspecifiedforthisaccessHuntgroup:numberofaccessesoverwhichtheLHsupplementaryserviceappliesfortheassignedISDNnumber.AhuntgroupmayconsistofasingleaccessHuntgroupnumber:ISDNnumber,towhichtheLHsupplementaryserviceisallocatedandtowhichISDNbasicservicesandsupplementaryservicesrelatingtothehuntgroupareallocatedHuntgroupwithdrawal:requestbyaaccessofthehuntgroupinordertotemporarilypreventthisaccessfromreceivingcallstothehuntgroup(existingcallsarenotaffected)Individualnumber:(inthecontextofthepresentdocument)ISDNnumberwhichisnotahuntgroupnumber,butwhichcanbeassociatedwithanaccessthatbelongstoahuntgroupinordertoidentifyoneormoreterminalsconnectedtotheaccessIntegratedServicesDigitalNetwork(ISDN):seeITU-TRecommendationI.112[5],subclause2.3,definition308ISDNnumber:numberconformingtothenumberingplanandstructurespecifiedinITU-TRecommendationE.164[10]Network:DSS1protocolentityatthenetworksideoftheuser-networkinterfaceNetworkdetermineduserbusy:seeITU-TRecommendationI.221[14],subclause2.1.4SIST EN 301 484-1 V1.1.1:2005



ETSIETSIEN301484-1V1.1.1(2000-04)8Primaryrateaccess:seeITU-TRecommendationI.112[5],subclause2.4,definition426Sequentialhunting:selectionofafreeaccessalwaysstartswiththesameaccessandthenfollowsafixedorderuntilallaccessesinthehuntgrouphavebeensearchedorafreeaccessisfoundServeduser:usertowhomtheLHserviceisprovidedService;telecommunicationsservice:seeITU-TRecommendationI.112[5],subclause2.2,definition201Supplementaryservice:seeITU-TRecommendationI.210[6],subclause2.4User:DSS1protocolentityattheusersideoftheuser-networkinterfacewhenacoincidentSandTreferencepointappliesUserdetermineduserbusy:seeITU-TRecommendationI.221[14],subclause2.1.44AbbreviationsForthepurposeofthepresentdocument,thefollowingabbreviationsapply:HGHuntGroupISDNIntegratedServicesDigitalNetworkLHLineHuntingLHGLineHuntGroup5DescriptionTheLHsupplementaryserviceisintendedforuseonaccessestowhichterminalsareconnectedattheS/Treferencepoint.TheLHsupplementaryserviceenablescallstoanISDNnumber(i.e.thehuntgroupnumber)tobeofferedtoafreeaccessinahuntgroup.Thehuntgroupcancomprisebasicaccesses,primaryrateaccesses(asanetworkoption),oramixtureofthesetypesofaccesses.TheLHsupplementaryserviceappliestoaccesseswithinahuntgroupthatareconnectedtothesameexchange.AsanetworkoptiontheLHsupplementaryservicecanbeusedtocreateamulti-nodalservicethatallowslinehuntingacrossaccessesonmultipleexchanges.Thespecificationofthemulti-nodalserviceisoutsidethescopeofthepresentdocument,howeverannexAofEN301479[1]considerssomeoftheimplicationsofthisservice.Callsmadetoanindividualnumber(seenote1)maybeofferedonthecorrespondingaccesswithoutbeingsubjecttohuntingprocedures(channelhuntingmaybeperformedwithintheaccessitself).NOTE1:Theindividualaccessesthataremembersofthehuntgroupcanalsohaveindividualnumbers(e.g.,withthemultiplesubscribernumbersupplementaryservice)allocated.Itistheuser'sresponsibilitytoensurecompatibilityoftheequipmentconnectedtoanaccessinahu
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