SIST EN 300 347-8 V2.1.1:2005

• Abstract:

  Corrections of errors in layer 2 ATS discovered as side-effect of work in STF on layer 3.

• Status: Published
• Publication Date: 31-Dec-2004
• ICS: 33.040.30 - Switching and signalling systems
• 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 300 347-8 V2.1.1 (2000-06) - V interfaces at the digital Local Exchange (LE); V5.2 interface for the support of Access Network (AN); Part 8: Abstract Test Suite (ATS) and partial Protocol Implementation eXtra Information for Testing (PIXIT) proforma specification for the data link layer

Overview

SIST EN 300 347-8 V2.1.1:2005 outlines the framework and specifications for conformance testing at the V5.2 interface data link layer, situated between the digital Local Exchange (LE) and the Access Network (AN) in telecommunications systems. This standard focuses on the provision and maintenance of an Abstract Test Suite (ATS) and a partial Protocol Implementation eXtra Information for Testing (PIXIT) proforma specifically for V5.2 interfaces. The goal is to ensure interoperability and protocol compliance in switching and signalling systems, emphasizing corrections of errors in layer 2 ATS as identified during work on layer 3 specifications.

Key Topics

• V5.2 Interface Conformance Testing: The document defines methods for verifying that V5.2 data link layer protocols are implemented correctly in both Access Networks (AN) and Local Exchanges (LE).
• Abstract Test Suite (ATS): The ATS, designed in accordance with the Tree and Tabular Combined Notation (TTCN) as per ISO/IEC 9646-3, details a set of test cases and procedures used to assess protocol conformance at the data link layer.
• PIXIT Proforma: The PIXIT proforma provides a structured mechanism for implementers to outline specific characteristics of their protocol implementation relevant to testing, aligning with ISO/IEC 9646-5 guidance.
• Test Methodologies: The standard employs both remote and embedded test methods, covering scenarios for both symmetrical and asymmetrical protocol subjects between AN and LE components.
• Naming and Implementation Conventions: Detailed rules for test suite naming, parameters, comments, and constraint management are included to foster consistency, clarity, and maintainability of ATS development.

Applications

SIST EN 300 347-8 V2.1.1:2005 is essential for:

• Telecommunications Equipment Manufacturers: Ensures their equipment for digital Local Exchanges (LE) and Access Networks (AN) achieves high interoperability and meets the required V5.2 protocol conformance through standardized testing.
• Conformance Test Laboratories: Provides the reference ATS and PIXIT tools necessary to organize, document, and execute comprehensive data link layer testing for V5.2 interfaces.
• Network Operators: Enables evaluation and acceptance testing for new equipment based on conformance to V5.2 protocol requirements, contributing to reliable switching and signalling.
• Protocol Implementers: Offers a structured environment to document implementation details that affect protocol testing and supports debugging and integration across vendor solutions.

Practical value is found in the facilitation of smooth network integration, accelerated troubleshooting, and enhanced assurance of multi-vendor interoperability in public switched telephone networks (PSTN) and ISDN deployments.

Related Standards

This standard should be applied together with several key related specifications, including:

• EN 300 347-1: V5.2 interface basic specification
• EN 300 347-2: PICS proforma for V5.2 interfaces
• EN 300 347-7: Test Suite Structure and Test Purposes (TSS&TP) for V5.2 data link layer
• ISO/IEC 9646-1/2/3/5: Conformance testing methodology, framework, and TTCN notation
• EN 300 324-8: ATS and PIXIT proforma for V5.1 interface data link layer

Additional references exist for software tools, test methodology (ETSI ETS 300406), and protocol testing style guides.

---

Keywords: V5.2 interface, data link layer, Abstract Test Suite (ATS), PIXIT proforma, Local Exchange (LE), Access Network (AN), telecommunications conformance testing, switching and signalling systems, TTCN, interoperability, protocol compliance, ISO/IEC 9646.

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Vmesniki V pri digitalnih krajevnih centralah (LE) – Vmesnik V5.2 za podporo dostopovnemu omrežju (AN) – 8. del: Abstraktni preskušalni niz (ATS) in delna dodatna informacija za preskušanje izvedbe protokola (PIXIT) – Proforma specifikacija za podatkovno povezovalno plastV interfaces at the digital Local Exchange (LE); V5.2 interface for the support of Access Network (AN); Part 8: Abstract Test Suite (ATS) and partial Protocol Implementation eXtra Information for Testing (PIXIT) proforma specification for the data link layer33.040.30Komutacijski in signalizacijski sistemSwitching and signalling systemsICS:Ta slovenski standard je istoveten z:EN 300 347-8 Version 2.1.1SIST EN 300 347-8 V2.1.1:2005en01-januar-2005SIST EN 300 347-8 V2.1.1:2005SLOVENSKI
STANDARD
ETSIEN300347-8V2.1.1(2000-06)EuropeanStandard(Telecommunicationsseries)VinterfacesatthedigitalLocalExchange(LE);V5.2interfaceforthesupportofAccessNetwork(AN);Part8:AbstractTestSuite(ATS)andpartialProtocolImplementationeXtraInformationforTesting(PIXIT)proformaspecificationforthedatalinklayerSIST EN 300 347-8 V2.1.1:2005

ETSIETSIEN300347-8V2.1.1(2000-06)2ReferenceREN/SPAN-09108-8-1KeywordsVinterface,V5interface,ISDN,LE,ATS,PIXIT,testing,layer2,ANETSI650RoutedesLuciolesF-06921SophiaAntipolisCedex-FRANCETel.:[phone]Fax:[phone]SiretN°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:[e-mail]opartmaybereproducedexceptasauthorizedbywrittenpermission.Thecopyrightandtheforegoingrestrictionextendtoreproductioninallmedia.©EuropeanTelecommunicationsStandardsInstitute2000.Allrightsreserved.SIST EN 300 347-8 V2.1.1:2005

ETSIETSIEN300347-8V2.1.1(2000-06)3ContentsIntellectualPropertyRights.5Foreword.51Scope.62References.63Definitionsandabbreviations.73.1Definitions.73.2Abbreviations.74Abstracttestmethod.84.1ATM.84.2DLLprotocoltesting.84.3Executionoftestcases.94.3.1AN-LEtesting.94.3.2Handlingoferrorindications.94.3.3LinkcontrolFSM-PhysicalLayerconnection.94.3.4Testcaseexecutionsequence.95Untestabletestpurposes.105.1ListofunimplementedTPs.106Abstracttestsuiteconventions.106.1Namingconventions.106.1.1Declarationpart.106.1.2Constraintpart.116.1.3Dynamicpart.116.1.3.1Testcases.116.1.3.2Teststeps.116.1.3.3Generalaspects.126.1.4ATSabbreviations.126.2Implementationconventions.126.2.1Declarationpart.126.2.2Constraintpart.136.2.3Dynamicpart.14AnnexA(normative):AbstracttestsuiteforDLLtesting.15A.1TheTTCNGraphicalform(TTCN.GR).15A.2TheTTCNMachineProcessableform(TTCN.MP).15AnnexB(normative):PartialPIXITproforma.16B.1Introduction.16B.2PIXITproforma.16B.2.1Identificationsummary.16B.2.2Abstracttestsuitesummary.16B.2.3Testlaboratory.16B.2.4Client.17B.2.5SUT.17B.2.6Protocollayerinformation.18B.2.6.1Protocolidentification.18B.2.6.2IUTinformation.18SIST EN 300 347-8 V2.1.1:2005

ETSIETSIEN300347-8V2.1.1(2000-06)4AnnexC(informative):MergingprocedureofV5.1ATSandV5.2ATSadditions.20History.21SIST EN 300 347-8 V2.1.1:2005

ETSIETSIEN300347-8V2.1.1(2000-06)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).Thepresentdocumentispart8ofamulti-partstandardcoveringtheV5.1interfaceasdescribedbelow:Part1:"V5.2interfacespecification";Part2:"ProtocolImplementationConformanceStatement(PICS)proforma";Part3:"TestSuiteStructureandTestPurposes(TSS&TP)specificationforthenetworklayer(ANside)";Part4:"AbstractTestSuite(ATS)andpartialProtocolImplementationeXtraInformationforTesting(PIXIT)proformaspecificationforthenetworklayer(ANside)";Part5:"TestSuiteStructureandTestPurposes(TSS&TP)specificationforthenetworklayer(LEside)";Part6:"AbstractTestSuite(ATS)andpartialProtocolImplementationeXtraInformationforTesting(PIXIT)proformaspecificationforthenetworklayer";Part7:"TestSuiteStructureandTestPurposes(TSS&TP)specificationforthedatalinklayer";Part8:"AbstractTestSuite(ATS)andpartialProtocolImplementationeXtraInformationforTesting(PIXIT)proformaspecificationforthedatalinklayer";Part9:"Testspecificationforthephysicallayer".NationaltranspositiondatesDateofadoptionofthisEN:5May2000DateoflatestannouncementofthisEN(doa):31August2000DateoflatestpublicationofnewNationalStandardorendorsementofthisEN(dop/e):28February2001DateofwithdrawalofanyconflictingNationalStandard(dow):28February2001SIST EN 300 347-8 V2.1.1:2005

ETSIETSIEN300347-8V2.1.1(2000-06)61ScopeThiseighthpartofEN300347containstheAbstractTestSuite(ATS)aswellastheAbstractTestMethod(ATM)andthepartialProtocolImplementationeXtraInformationforTesting(PIXIT)proformafortheDataLinkLayer(DLL)oftheV5.2interface.TheobjectiveofthepresentdocumentistoprovideanATScontainingconformancetestswhichgiveahighprobabilityofinter-operabilityofanAccessNetwork(AN)andaLocalExchange(LE)fromdifferentmanufacturersovertheV5.2interface.ISO/IEC9646-1[8]andISO/IEC9646-2[9]areusedasthebasisforthetestmethodology.TheATSisdefinedusingtheTreeandTabularCombinedNotation(TTCN)accordingtoISO/IEC9646-3[10].TheATSinannexAdescribesasetofTestCases(TCs)whicharebasedontheTestPurposes(TPs)specifiedinETS300347-7[7](whichisanextensionofETS300324-7[3]).TheTCsprovidetheimplementationoftheTPsandcanbeconvertedintoanexecutabletestsuitebyusingavailableTTCNtranslatorsandthecorrespondingtools.AnnexBprovidesthepartialPIXITproforma.ThepresentdocumentneedstobeusedinconjunctionwithETS300324-8[4].TocreateacompleteV5.2ATS,theV5.1ATScontainedinETS300324-8[4]andtheV5.2ATSadditionscontainedinannexAofthepresentdocumentneedtobemerged.AnnexCgivesassistancewiththisprocedure.2ReferencesThefollowingdocumentscontainprovisionswhich,throughreferenceinthistext,constituteprovisionsofthepresentdocument.• Referencesareeitherspecific(identifiedbydateofpublication,editionnumber,versionnumber,etc.)ornon-specific.• Foraspecificreference,subsequentrevisionsdonotapply.• Foranon-specificreference,thelatestversionapplies.• Anon-specificreferencetoanETSshallalsobetakentorefertolaterversionspublishedasanENwiththesamenumber.[1]ETSIEN300324-1:"VinterfacesatthedigitalLocalExchange(LE);V5.1interfaceforthesupportofAccessNetwork(AN);Part1:V5.1interfacespecification".[2]ETSIETS300324-5(1999):"VinterfacesatthedigitalLocalExchange(LE);V5.1interfaceforthesupportofAccessNetwork(AN);Part5:TestSuiteStructureandTestPurposes(TSS&TP)specificationforthenetworklayer(LEside)".[3]ETSIETS300324-7(1999):"VinterfacesatthedigitalLocalExchange(LE);V5.1interfaceforthesupportofAccessNetwork(AN);Part7:TestSuiteStructureandTestPurposes(TSS&TP)specificationforthedatalinklayer".[4]ETSIETS300324-8(1999):"VinterfacesatthedigitalLocalExchange(LE);V5.1interfaceforthesupportofAccessNetwork(AN);Part8:AbstractTestSuite(ATS)andpartialProtocolImplementationeXtraInformationforTesting(PIXIT)proformaspecificationforthedatalinklayer".[5]ETSIETS300347-1(1994)includingamendmentA1:"VinterfacesatthedigitalLocalExchange(LE);V5.2interfaceforthesupportofAccessNetwork(AN);Part1:V5.2interfacespecification".[6]ETSIEN300347-2:"VinterfacesatthedigitalLocalExchange(LE);V5.2interfaceforthesupportofAccessNetwork(AN);Part2:ProtocolImplementationConformanceStatement(PICS)proformaspecification".SIST EN 300 347-8 V2.1.1:2005

ETSIETSIEN300347-8V2.1.1(2000-06)7[7]ETSIETS300347-7(1999):"VinterfacesatthedigitalLocalExchange(LE);V5.2interfaceforthesupportofAccessNetwork(AN);Part7:TestSuiteStructureandTestPurposes(TSS&TP)specificationforthedatalinklayer".[8]ISO/IEC9646-1:"InformationTechnology-OpenSystemsInterconnection-Conformancetestingmethodologyandframework-Part1:Generalconcepts".[9]ISO/IEC9646-2:"InformationTechnology-OpenSystemsInterconnection-Conformancetestingmethodologyandframework-Part2:Abstracttestsuitespecification".[10]ISO/IEC9646-3:"InformationTechnology-OpenSystemsInterconnection-Conformancetestingmethodologyandframework-Part3:TheTreeandTabularCombinedNotation(TTCN)".[11]ISO/IEC9646-5:"InformationTechnology-OpenSystemsInterconnection-Conformancetestingmethodologyandframework-Part5:Requirementsontestlaboratoriesandclientsfortheconformanceassessmentprocess".[12]ETSIETS300406:"MethodsforTestingandSpecification(MTS);Protocolandprofileconformancetestingspecifications;Standardizationmethodology".[13]ETSIETR141:"MethodsforTestingandSpecification(MTS);Protocolandprofileconformancetestingspecifications;TheTreeandTabularCombinedNotation(TTCN)styleguide".[14]Void.[15]ETSIETS300347-8:"VinterfacesatthedigitalLocalExchange(LE);V5.2interfaceforthesupportofAccessNetwork(AN);Part8:AbstractTestSuite(ATS)andpartialProtocolImplementationeXtraInformationforTesting(PIXIT)proformaspecificationforthedatalinklayer".3Definitionsandabbreviations3.1DefinitionsForthepurposesofthepresentdocument,thetermsanddefinitionsgiveninETS300324-8[4]apply.3.2AbbreviationsForthepurposesofthepresentdocument,thefollowingabbreviationsapply:ANAccessNetworkASPAbstractServicePrimitiveATMAbstractTestMethodATSAbstractTestSuiteBIInvalidBehaviourBOInopportuneBehaviourBVValidBehaviourCACapabilitytestDLLDataLinkLayerFSMFiniteStateMachineIDInterfaceidentifierISDNIntegratedServicesDigitalNetworkITbasicInterconnectionTestIUTImplementationUnderTestLAPV5LinkAccessProtocolforV5interfaceLAPV5-DLLAPV5DataLinksublayerLAPV5-EFLAPV5EnvelopeFunctionsublayerLELocalExchangeLT1LowerTester1SIST EN 300 347-8 V2.1.1:2005

ETSIETSIEN300347-8V2.1.1(2000-06)8NWKNetworkLayerPCOPointofControlandObservationPDUProtocolDataUnitPHLPhysicalLayerPICSProtocolImplementationConformanceStatementPIXITProtocolImplementationeXtranInformationforTestingPSAPPHLServiceAccessPointPSTNPublicSwitchedTelephoneNetworkSAPServiceAccessPointSUTSystemUnderTestTCTestCaseTEITerminalEndpointIdentifierTITimerTPTestPurposeTTCNTreeandTabularCombinedNotationUTUpperTesterV5DLLV5DataLinkLayer4AbstracttestmethodThisclausedescribestheAbstractTestMethod(ATM)andthePointofControlandObservation(PCO)usedtotesttheDLLoftheV5.2protocol.4.1ATMPrincipally,theremotetestmethodisusedforV5DLLconformancetesting.CertainDLLTPsneedalsopartoftheNWKfunctions(e.g.Iframetransmission).Therefore,theembeddedvariantoftheremotetestmethodisapplied.4.2DLLprotocoltestingTheV5implementationsdonotofferadirectaccesstotheupperserviceboundary.Theremotetestmethodwaschosenbecauseanyco-ordinationprocedurescanonlybeexpressedinaninformalway.SUTV5TestSystemV5-DLLPCO/PSAPV5-DLLPDULT1PhysicalLayerIUTServiceProvidernotionalUTPH-DataFigure1:RemotetestmethodappliedtotheV5.1DLLtestingSIST EN 300 347-8 V2.1.1:2005

ETSIETSIEN300347-8V2.1.1(2000-06)9LT1:ALowerTester(LT1)islocatedinaremoteV5testsystem.ItcontrolsandobservesthebehavioursoftheIUT.PCO:ThePCOforDLLtestingislocatedonthePSAP.AlltesteventsatthePCOarespecifiedintermsofPH-DataASPsandDLLPDUs.AsinglePCOisdefinedforDLLtestinginordertoexchangemessagesoftheLAPV5-EFsublayeraswellasoftheLAPV5-DLsublayer.NotionalUT:ThenotionalUTincludestheNWKandSystemManagementfunctions.V5-DLL:V5-DLLincludesLAPV5-EF,mappingfunctionandLAPV5-DL.ANtest:TotesttheLAPV5-EFprotocol,anISDNterminalshallbeconnectedtotherelevantuserport.4.3Executionoftestcases4.3.1AN-LEtestingRegardingtheDLLprotocolofV5.2,theV5.2interfaceisalmostsymmetrical,exceptthattheFrameRelayfunctionisonlyimplementedintheAN.TherearetwoprotocolsubjectswhichhavetobeadaptedforLEtesting,themessagesequenceofagenericcalltotheISDNentityandthehandlingoftheCRbit.ThegenericcalltotheISDNentityisstoppedafterhavingreceivedfromtheIUTanUAresponseframeasaresponsetoapreviouslysentSABMEcommandframe.UntiltheISDNlinkinitializationtheV5.2protocolissymmetricalasonlyapoint-to-pointconnectionoverasingledatalinkisestablished(fixedTEI).TheproblemoftheCRbithandlingissolvedintheATS.TheCRbitisdefinedasatestsuiteparameterwhichallowstoinverttheCRbitforLEtesting.Table1documentsthisapproach.Table1:AN-LEparametersANLETSPX_ANTRUEFALSECR_0'0'B'1'BCR_1'1'B'0'B4.3.2HandlingoferrorindicationsDuringtheexecutionoftheDLLATSmanyMDL-ERROR-INDwillbesenttothesystemmanagementduetotheinvalidandinopportunetestcases.ItisuptotheIUTsuppliertotakethenecessaryprecautionstoavoidanyimpactonthetestresult.SometestsuseNWKprocedurestotestDLLfunctions,itisnotalwayspossibletohandletheNWKproperly.TheeffectsofsuchfaultyNWKmessagesandproceduresareoutofthescopeoftheDLLATS.ItisuptotheIUTsuppliertotakethenecessaryprecautionstoavoidanyimpactonthetestresult.4.3.3LinkcontrolFSM-PhysicalLayerconnectionDuringtheLinkidentificationprocedure(seeETS300347-1[5],subclause16.2.4.3.5)theLinkcontrolFSMneedstocommunicatewitthePhysicallayer.ThisfacthasadirectimpactontheexecutionoftheLinkidentificationprocedure.Asitisnotpossibletomakerequirementsontheinternalbehavio
...