SIST EN 301 479 V1.1.2:2005
(Main)Integrated Services Digital Network (ISDN); Line Hunting (LH) supplementary service; Service description
General Information
- Abstract
Stage 1 description of the supplementary service: Line hunting
- Status
- Published
- Publication Date
- 31-Dec-2004
- 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
Overview
SIST EN 301 479 V1.1.2:2005 is a European standard, adopted by the Slovenski inštitut za standardizacijo (SIST), that defines the stage 1 service description for the Line Hunting (LH) supplementary service within the Integrated Services Digital Network (ISDN). This supplementary service is a crucial feature for modern telecommunication systems, enabling efficient routing of incoming calls within a group of ISDN accesses-a functionality widely known as "line hunting." The standard establishes the basic principles of how calls to a single ISDN number can be automatically offered to any free access in a grouped set of terminal connections.
Key Topics
- ISDN Line Hunting (LH) Service: Specifies how incoming calls to a specific ISDN group number are distributed to available accesses, enhancing efficiency and responsiveness for organizations with multiple ISDN terminal connections.
- Hunt Group Configuration: Outlines the creation and management of hunt groups, which may include basic access, primary rate access, or a combination, within the same network exchange.
- Selection Methods: Supports both sequential and cyclic line hunting, enabling flexible call distribution strategies to match organizational needs.
- Supplementary Service Interactions: Addresses compatibility and interactions with other ISDN supplementary services, including call forwarding, call barring, number identification, and conference services.
- User and Provider Options: Describes user and provider configurable options such as the number of available B-channels per access, hunt group withdrawal capability, and notification settings if an access is withdrawn from a hunt group.
Applications
The ISDN Line Hunting supplementary service is widely applicable in business and organizational environments where efficient call handling is critical:
- Corporate Telephony: Enables organizations with multiple ISDN lines to handle inbound call volume more efficiently by automatically routing calls to available lines, reducing missed calls and wait times.
- Call Centers: Enhances operational efficiency by ensuring calls are always directed to free agents, minimizing customer hold times.
- Shared Office Spaces: Allows multiple devices or tenants to share ISDN access points, distributing inbound calls according to availability.
- Hotels and Large Facilities: Optimizes telecom resources by managing calls across multiple guest room or office lines.
Related Standards
The following standards are closely related to or referenced within SIST EN 301 479:
- CCITT Recommendation I.130: Specifies the methodology for service characterization within ISDN.
- ITU-T Recommendation I.112: Provides vocabulary and foundational terminology for ISDN.
- ITU-T Recommendation E.164: Defines the international numbering plan for public telecommunications.
- ETSI EN 301 484: Details the stage 3 protocol specification for the ISDN LH service.
- ETSI EN 300 089: Covers the Calling Line Identification Presentation (CLIP) supplementary service.
These related standards provide expanded context on technical requirements, interoperability, and service architecture, enabling comprehensive ISDN deployments in line with European and international best practices.
Keywords: ISDN, Line Hunting, supplementary service, hunt group, call distribution, business telephony, telecommunication standard, SIST EN 301 479, ISDN group number, B-channel, sequential hunting, cyclic hunting, call routing, ETSI standard.
Get Certified
Connect with accredited certification bodies for this standard
ANCE
Mexican certification and testing association.
Intertek Slovenia
Intertek testing, inspection, and certification services in Slovenia.
LNE (Laboratoire National de Métrologie et d'Essais)
French national laboratory for metrology and testing.
Sponsored listings
Frequently Asked Questions
SIST EN 301 479 V1.1.2:2005 is a standard published by the Slovenian Institute for Standardization (SIST). Its full title is "Integrated Services Digital Network (ISDN); Line Hunting (LH) supplementary service; Service description". This standard covers: Stage 1 description of the supplementary service: Line hunting
Stage 1 description of the supplementary service: Line hunting
SIST EN 301 479 V1.1.2:2005 is classified under the following ICS (International Classification for Standards) categories: 33.080 - Integrated Services Digital Network (ISDN). The ICS classification helps identify the subject area and facilitates finding related standards.
SIST EN 301 479 V1.1.2:2005 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.Digitalno omrežje z integriranimi storitvami (ISDN) – Dopolnilna storitev: iskanje voda v skupini (LH) – Opis storitveIntegrated Services Digital Network (ISDN); Line Hunting (LH) supplementary service; Service description33.080Digitalno omrežje z integriranimi storitvami (ISDN)Integrated Services Digital Network (ISDN)ICS:Ta slovenski standard je istoveten z:EN 301 479 Version 1.1.2SIST EN 301 479 V1.1.2:2005en01-januar-2005SIST EN 301 479 V1.1.2:2005SLOVENSKI
STANDARD
ETSIEN301479V1.1.2(2000-08)EuropeanStandard(Telecommunicationsseries)IntegratedServicesDigitalNetwork(ISDN);LineHunting(LH)supplementaryservice;ServicedescriptionSIST EN 301 479 V1.1.2:2005
ETSIETSIEN301479V1.1.2(2000-08)2ReferenceDEN/SPAN-020003KeywordsISDN,LH,stage1,supplementaryserviceETSI650RoutedesLuciolesF-06921SophiaAntipolisCedex-FRANCETel.:+33492944200Fax:+33493654716SiretN°34862356200017-NAF742CAssociationàbutnonlucratifenregistréeàlaSous-PréfecturedeGrasse(06)N°7803/88ImportantnoticeIndividualcopiesofthepresentdocumentcanbedownloadedfrom:http://www.etsi.orgThepresentdocumentmaybemadeavailableinmorethanoneelectronicversionorinprint.Inanycaseofexistingorperceiveddifferenceincontentsbetweensuchversions,thereferenceversionisthePortableDocumentFormat(PDF).Incaseofdispute,thereferenceshallbetheprintingonETSIprintersofthePDFversionkeptonaspecificnetworkdrivewithinETSISecretariat.Usersofthepresentdocumentshouldbeawarethatthedocumentmaybesubjecttorevisionorchangeofstatus.InformationonthecurrentstatusofthisandotherETSIdocumentsisavailableathttp://www.etsi.org/tb/status/Ifyoufinderrorsinthepresentdocument,sendyourcommentto:editor@etsi.frCopyrightNotificationNopartmaybereproducedexceptasauthorizedbywrittenpermission.Thecopyrightandtheforegoingrestrictionextendtoreproductioninallmedia.©EuropeanTelecommunicationsStandardsInstitute2000.Allrightsreserved.SIST EN 301 479 V1.1.2:2005
ETSIETSIEN301479V1.1.2(2000-08)3ContentsIntellectualPropertyRights.5Foreword.51Scope.62References.63Definitions.74Abbreviations.85Description.86Procedures.96.1Provisionandwithdrawal.96.2Normalprocedures.106.2.1Activation,deactivationandregistration.106.2.2Erasure.106.2.3Invocationandoperation.106.2.4Interrogation.106.3Exceptionalprocedures.106.3.1Activation,deactivationandregistration.106.3.2Erasure.116.3.3Invocationandoperation.116.3.4Interrogation.117Intercommunicationconsiderations.117.1Interworkingwithnon-lSDNs.117.2InterworkingwithprivateISDNs.118Interactionwithothersupplementaryservices.118.1Adviceofchargeservices.128.1.1Adviceofchargeatcallset-uptime.128.1.2Adviceofchargeduringthecall.128.1.3Adviceofchargeattheendofacall.128.2Callwaiting.128.3Callhold.128.4Explicitcalltransfer.128.5Numberidentificationservices.138.5.1Callinglineidentificationpresentation.138.5.2Callinglineidentificationrestriction.138.5.3Connectedlineidentificationpresentation.138.5.4Connectedlineidentificationrestriction.138.6Closedusergroup.138.7Callcompletionservices.138.7.1Completionofcallstobusysubscriber.138.7.2Completionofcallsonnoreply.138.8Conferenceservices.148.8.1Conferencecall,add-on.148.8.2Conferencecall,meet-me.148.9Directdiallingin.148.10Diversionservices.148.10.1Callforwardingunconditional.148.10.2Callforwardingbusy.148.10.3Callforwardingnoreply.148.10.4Calldeflection.148.10.5Selectivecallforwarding.148.11Freephone.158.12Maliciouscallidentification.15SIST EN 301 479 V1.1.2:2005
ETSIETSIEN301479V1.1.2(2000-08)48.13Multiplesubscribernumber.158.14Subaddressing.158.15Terminalportability.158.16Threeparty.158.17User-to-usersignalling.158.18Huntingservices.158.18.1Linehunting.158.18.2Trunkhunting.168.19Callbarringservices.168.19.1Outgoingcallbarring-fixed.168.19.2Outgoingcallbarring-usercontrolled.169Interactionwithotherservices.169.1Universalaccessnumber.169.2Virtualcardcalling.169.3Premiumrate.169.4Universalpersonaltelecommunication.169.5Remotecontrol.16AnnexA(informative):ConsiderationofaMulti-NodalLineHuntingservice.17Bibliography.18History.19SIST EN 301 479 V1.1.2:2005
ETSIETSIEN301479V1.1.2(2000-08)5IntellectualPropertyRightsIPRsessentialorpotentiallyessentialtothepresentdocumentmayhavebeendeclaredtoETSI.TheinformationpertainingtotheseessentialIPRs,ifany,ispubliclyavailableforETSImembersandnon-members,andcanbefoundinETSISR000314:"IntellectualPropertyRights(IPRs);Essential,orpotentiallyEssential,IPRsnotifiedtoETSIinrespectofETSIstandards",whichisavailablefromtheETSISecretariat.LatestupdatesareavailableontheETSIWebserver(http://www.etsi.org/ipr).PursuanttotheETSIIPRPolicy,noinvestigation,includingIPRsearches,hasbeencarriedoutbyETSI.NoguaranteecanbegivenastotheexistenceofotherIPRsnotreferencedinETSISR000314(ortheupdatesontheETSIWebserver)whichare,ormaybe,ormaybecome,essentialtothepresentdocument.ForewordThisEuropeanStandard(Telecommunicationsseries)hasbeenproducedbyETSITechnicalCommitteeServicesandProtocolsforAdvancedNetworks(SPAN).InaccordancewithCCITTRecommendationI.130[1],thefollowingthreelevelstructureisusedtodescribethesupplementarytelecommunicationsservicesasprovidedbyEuropeanpublictelecommunicationsoperatorsunderthepan-EuropeanIntegratedServicesDigitalNetwork(ISDN):Stage1:isanoverallservicedescription,fromtheuser'sstandpoint;Stage2:identifiesthefunctionalcapabilitiesandinformationflowsneededtosupporttheservicedescribedinstage1;andStage3:definesthesignallingsystemprotocolsandswitchingfunctionsneededtoimplementtheservicedescribedinstage1.Thepresentdocumentdetailsthestage1aspects(overallservicedescription)fortheLineHunting(LH)supplementaryservice.Stage2willbespecifiedlaterintheETS300356[8]series.Stage3aspectsaredetailedinEN301484-1[7].NationaltranspositiondatesDateofadoptionofthisEN:25August2000DateoflatestannouncementofthisEN(doa):30November2000DateoflatestpublicationofnewNationalStandardorendorsementofthisEN(dop/e):31May2001DateofwithdrawalofanyconflictingNationalStandard(dow):31May2001SIST EN 301 479 V1.1.2:2005
ETSIETSIEN301479V1.1.2(2000-08)61ScopeThepresentdocumentdefinesthestageoneoftheLineHunting(LH)supplementaryserviceforthepan-EuropeanIntegratedServicesDigitalNetwork(ISDN)asprovidedbyEuropeanpublictelecommunicationsoperators.Stageoneisanoverallservicedescriptionfromtheuser'spointofview(seeCCITTRecommendationI.130[1]),butdoesnotdealwiththedetailsofthehumaninterfaceitself.ThepresentdocumentdefinestheinterworkingrequirementsofprivateISDNswiththepublicISDN.InadditionthepresentdocumentspecifiesthebasefunctionalitywheretheserviceisprovidedtotheuserbyaprivateISDN.ThepresentdocumentdoesnotspecifytheadditionalrequirementswheretheserviceisprovidedtotheuserviaatelecommunicationsnetworkthatisnotanISDNbutdoesincludeinterworkingrequirementsofothernetworkswiththepublicISDN.Interactionswith(supplementary)servicesnotlistedinclauses8and9areoutsidethescopeofthepresentdocument.Chargingprinciplesareoutsidethescopeofthepresentdocument.TheLHsupplementaryserviceenablescallstoasingleISDNnumbertobeofferedtoafreeaccessinagroupofaccessestowhichterminalsareconnectedtoanend-user'smultipleaccessgroup(S/Treferencepoint).Theprinciplesfortheselectionofafreechannelwithinanaccessareanetworkprovidermatteraspartofthebasiccallproceduresandsoareoutsidethescopeofthepresentdocument.TheLHsupplementaryserviceisapplicabletoallcircuit-switchedtelecommunicationsserviceswiththeexceptionofservicesrequiringtheuseofmorethanoneB-channel.ThepresentdocumentisapplicabletothestagetwoandstagethreestandardsfortheISDNLHsupplementaryservice.Theterms"stagetwo"and"stagethree"arealsodefinedinCCITTRecommendationI.130[1].Wherethetextindicatesthestatusofarequirement,(i.e.asstrictcommandorprohibition,asauthorizationleavingfreedom,asacapabilityorpossibility),thisshallbereflectedinthetextoftherelevantstagetwoandstagethreestandards.Furthermore,conformancetothepresentdocumentismetbyconformingtothestagethreestandardswiththefieldofapplicationappropriatetotheequipmentbeingimplemented.Thereforenomethodoftestingisprovidedforthepresentdocument.2ReferencesThefollowingdocumentscontainprovisionswhich,throughreferenceinthistext,constituteprovisionsofthepresentdocument.• Referencesareeitherspecific(identifiedbydateofpublication,editionnumber,versionnumber,etc.)ornon-specific.• Foraspecificreference,subsequentrevisionsdonotapply.• Foranon-specificreference,thelatestversionapplies.• Anon-specificreferencetoanETSshallalsobetakentorefertolaterversionspublishedasanENwiththesamenumber.[1]CCITTRecommendationI.130(1988):"MethodforthecharacterizationoftelecommunicationservicessupportedbyanISDNandnetworkcapabilitiesofanISDN".[2]ITU-TRecommendationI.112(1993):"VocabularyoftermsforISDNs".[3]ITU-TRecommendationI.210(1993):"PrinciplesoftelecommunicationservicessupportedbyanISDNandthemeanstodescribethem".SIST EN 301 479 V1.1.2:2005
ETSIETSIEN301479V1.1.2(2000-08)7[4]ITU-TRecommendationE.164(1997):"Theinternationalpublictelecommunicationnumberingplan".[5]ITU-TRecommendationI.221(1993):"Commonspecificcharacteristicsofservices".[6]ETSIEN300089:"IntegratedServicesDigitalNetwork(ISDN);CallingLineIdentificationPresentation(CLIP)supplementaryservice;Servicedescription".[7]ETSIEN301484-1:"IntegratedServicesDigitalNetwork(ISDN);LineHunting(LH)supplementaryservice;DigitalSubscriberSignallingSystemNo.one(DSS1);Part1:Protocolspecification".[8]ETSIETS300356:"IntegratedServicesDigitalNetwork(ISDN);SignallingSystemNo.7;ISDNUserPart(ISUP)version2fortheinternationalinterface".3DefinitionsForthepurposesofthepresentdocument,thefollowingtermsanddefinitionsapply:access:generalterm,usedinthepresentdocument,denotingbasicaccessesandasanetworkprovideroption,primaryrateaccessesaccessidentity:meansofidentifyinganindividualaccessbelongingtoahuntgroup;theaccessidentityconsistsofthehuntgroupnumberplusasequencenumberidentifyingtheindividualaccesswithinthehuntgroupIntegratedServicesDigitalNetwork(ISDN):seeITU-TRecommendationI.112[2],subclause2.3,definition308service;telecommunicationsservice:seeITU-TRecommendationI.112[2],subclause2.2,definition201supplementaryservice:seeITU-TRecommendationI.210[3],subclause2.4ISDNnumber:numberconformingtothenumberingplanandstructurespecifiedinITU-TRecommendationE.164[4]basicaccess:seeITU-TRecommendationI.112[2],subclause2.4,definition425primaryrateaccess:seeITU-TRecommendationI.112[2],subclause2.4,definition426freeaccess:accesstowhichthecallcanbeofferedwithoutexceedingthenumberofusedB-channelsspecifiedforthisaccesshuntgroup:numberofaccessesoverwhichtheLHsupplementaryserviceappliesfortheassignedISDNnumber.Ahuntgroupmayconsistofasingleaccesshuntgroupnumber:ISDNnumber,towhichtheLHsupplementaryserviceisallocatedandtowhichISDNbasicservicesandsupplementaryservicesrelatingtothehuntgroupareallocated.huntgroupwithdrawal:requestbyanaccessofthehuntgroupinordertotemporarilypreventthisaccessfromreceivingcallstothehuntgroup(existingcallsarenotaffected)individualnumber:(inthecontextofthepresentdocument)ISDNnumberwhichisnotahuntgroupnumber,butwhichcanbeassociatedwithanaccessthatbelongstoahuntgroupinordertoidentifyoneormoreterminalsconnectedtotheaccessserveduser:usertowhomtheLHsupplementaryserviceisprovidedbasiccallprocedures:proceduresbywhichacall(asaninstanceofabasictelecommunicationsservice)isestablishedandterminatednetworkdetermineduserbusy:seeITU-TRecommendationI.221[5],subclause2.1.4userdetermineduserbusy:seeITU-TRecommendationI.221[5],subclause2.1.4sequentialhunting:selectionofafreeaccessalwaysstartswiththesameaccessandthenfollowsafixedorderuntilallaccessesinthehuntgrouphavebeensearchedorafreeaccessisfoundSIST EN 301 479 V1.1.2:2005
ETSIETSIEN301479V1.1.2(2000-08)8cyclichunting:selectionofafreeaccessalwaysstartsatthenextaccessaftertheoneusedlast,andfollowsafixedorder.Whenthelastaccessinthegroupisreached,thesearchcontinuesfromthebeginningofthegroupuntilallaccessesinthegrouphavebeensearcheddefaultnumber:definedfortheCLIPserviceinEN300089[6]Inordertoprovideconsistencyfromacustomerperspectivethesamedefaultnumbermaybeassociatedwithalltheaccessesthatgotoauserinstallation.InthissituationthedefaultnumberisaHuntGroupNumberandtheHuntGroupitrelatestocontainsalltheaccessesthatgotoauserinstallation.end-user:userwhoisconnec
...