SIST EN 301 001-6 V1.1.4:2005

• Abstract:

  Test specification for DE/SPS-05107-1

• 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 301 001-6 V1.1.4 (1999-11) - Integrated Services Digital Network (ISDN); Outgoing Call Barring (OCB) supplementary services; Digital Subscriber Signalling System No. one (DSS1) protocol; Part 6: Abstract Test Suite (ATS) and partial Protocol Implementation eXtra Information for Testing (PIXIT) proforma specification for the network

SIST EN 301 001-6 V1.1.4:2005 is the SIST version of the ETSI standard for Integrated Services Digital Network (ISDN) Outgoing Call Barring (OCB) supplementary services on the Digital Subscriber Signalling System No. one (DSS1) protocol. It specifies the Abstract Test Suite (ATS) and partial Protocol Implementation eXtra Information for Testing (PIXIT) proforma for the network side of implementations at the T reference point, or the coincident S and T reference point. Test laboratories and implementers use it to prepare and run conformance tests against EN 301 001-1.

What does SIST EN 301 001-6 V1.1.4:2005 specify?

SIST EN 301 001-6 V1.1.4:2005 defines the network-side test material for OCB on ISDN, not the service description itself. It tells a test lab how to exercise a network implementation and how to capture the test information needed to run the ATS.

The document is organized into the scope, references, definitions and abbreviations, the abstract test method, untestable test purposes, ATS conventions, the ATS to test-purpose mapping, conformance rules for the report and PIXIT, and the ATS conformance statement. Its normative annexes provide the reusable test paperwork and the executable test content.

Annex	What it covers
Annex A	Protocol Conformance Test Report (PCTR) proforma
Annex B	Partial PIXIT proforma
Annex C	Abstract Test Suite (ATS)

What are the key requirements of SIST EN 301 001-6 V1.1.4:2005?

SIST EN 301 001-6 V1.1.4:2005 is built around a remote test method and a fixed way of turning abstract tests into executable ones. In practice, that means the test system controls the implementation from a distance and records verdicts from the lower interface.

Test method and observation points

The standard uses a remote test method for the OCB network ATS. It places a Point of Control and Observation (PCO) called "L" at the service access point between layers 2 and 3, and verdicts are based on what is observed there. It also defines an "O" PCO for operator coordination above the Implementation Under Test (IUT), but events at that point do not drive verdicts.

ATS notation and encoding

The ATS uses the Tree and Tabular Combined Notation (TTCN) defined in TR 101 101, with ASN.1 used where it improves type definition and matches the base protocol data. The default encoding for ASN.1 constraint tables is ISDN encoding, also described here as direct encoding, and Basic Encoding Rules (BER) are used only when the table comments say so. For a test lab, that means the test data must be encoded the way the standard specifies, or the results will not reflect the protocol correctly.

Conformance and mapping rules

The document states that there are no untestable test purposes associated with this ATS. It also sets a one-to-one mapping between test purposes and test case names, so the identifiers used for test purposes are reused as test case names.

Annex A and Annex B are not just forms - they are part of the conformance process. A Protocol Conformance Test Report (PCTR) must preserve the order and content of Annex A, and a PIXIT proforma must be technically equivalent to Annex B and may be expanded with extra questions needed for a particular IUT or test laboratory. The ATS in Annex C must be realized into an executable test suite (ExTS) that is technically equivalent to the abstract tests and can realize all test-event sequences.

What terms does SIST EN 301 001-6 V1.1.4:2005 define?

• Abstract Test Suite (ATS) - the abstract set of test cases and test groups used to assess conformance.
• Protocol Implementation eXtra Information for Testing (PIXIT) - the implementation-specific information needed to prepare the test environment.
• Protocol Conformance Test Report (PCTR) - the report used to record the outcome of conformance testing.
• Implementation Under Test (IUT) - the network implementation being checked against the protocol specification.
• System Under Test (SUT) - the system being configured and exercised during testing.
• Point of Control and Observation (PCO) - the point where the test system controls and observes behaviour.
• Tree and Tabular Combined Notation (TTCN) - the notation used to express the ATS.

Who uses SIST EN 301 001-6 V1.1.4:2005?

SIST EN 301 001-6 V1.1.4:2005 is used by test laboratories, test realizers, and clients commissioning conformance tests for network-side OCB implementations. It is also relevant to manufacturers and integrators preparing an IUT, because the PIXIT asks for protocol settings, timer values, number information values, and configuration actions that affect test execution.

In practice, users apply it to:

• prepare a Means of Testing (MOT)
• build an executable test suite from the ATS
• complete PIXIT information for a specific IUT
• produce a PCTR after test execution
• assess whether a network implementation conforms to EN 301 001-1

Which standards are used with SIST EN 301 001-6 V1.1.4:2005?

Reference	What it contributes
EN 301 001-1	The protocol specification that the ATS tests
EN 301 001-2	The Protocol Implementation Conformance Statement (PICS) proforma
EN 301 001-5	The Test Suite Structure and Test Purposes (TSS & TP) specification for the network
EN 300 196-1	The generic functional protocol base used for supplementary services and BER interpretation guidance
ISO/IEC 9646	The conformance testing framework and terminology
TR 101 101	The TTCN version used in this ATS
ISO/IEC 8825-1	The BER, CER and DER encoding rules for ASN.1

What does the SIST EN 301 001-6 V1.1.4:2005 document contain?

Annex A provides a structured PCTR proforma with identification, IUT status, static and dynamic conformance summaries, a test campaign report, and observations. Annex B provides the partial PIXIT proforma, including test-lab and client details, SUT identification, protocol information, parameter values, configuration actions, timer values, number information parameter values, and information element codings.

Annex C contains the ATS itself in TTCN form. The document says the ATS is available as both TTCN.GR and TTCN.MP companion files, which is what implementers and test tools use to build or exchange the executable test suite.

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.SUHVNXãDQMHIntegrated Services Digital Network (ISDN); Outgoing Call Barring (OCB) supplementary services; Digital Subscriber Signalling System No. one (DSS1) protocol; Part 6: Abstract Test Suite (ATS) and partial Protocol Implementation eXtra Information for Testing (PIXIT) proforma specification for the network33.080Digitalno omrežje z integriranimi storitvami (ISDN)Integrated Services Digital Network (ISDN)ICS:Ta slovenski standard je istoveten z:EN 301 001-6 Version 1.1.4SIST EN 301 001-6 V1.1.4:2005en01-januar-2005SIST EN 301 001-6 V1.1.4:2005SLOVENSKI
STANDARD
ETSIEN301001-6V1.1.4(1999-11)EuropeanStandard(Telecommunicationsseries)IntegratedServicesDigitalNetwork(ISDN);OutgoingCallBarring(OCB)supplementaryservices;DigitalSubscriberSignallingSystemNo.one(DSS1)protocol;Part6:AbstractTestSuite(ATS)andpartialProtocolImplementationeXtraInformationforTesting(PIXIT)proformaspecificationforthenetworkSIST EN 301 001-6 V1.1.4:2005

ETSIETSIEN301001-6V1.1.4(1999-11)2ReferenceDEN/SPS-05107-6(99pi0ieo.PDF)KeywordsATS,callbarring,DSS1,ISDN,network,PIXIT,supplementaryserviceETSIPostaladdressF-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 301 001-6 V1.1.4:2005

ETSIETSIEN301001-6V1.1.4(1999-11)3ContentsIntellectualPropertyRights.5Foreword.51Scope.62References.63Definitionsandabbreviations.73.1Definitions.73.2Abbreviations.74AbstractTestMethod.75Untestabletestpurposes.86ATSconventions.86.1VersionofTTCNused.86.2UseofASN.1.86.2.1SituationswhereASN.1isused.86.2.2Specificationofencodingrules.87ATStoTPmap.98PCTRconformance.99PIXITconformance.1010ATSconformance.10AnnexA(normative):ProtocolConformanceTestReport(PCTR)proforma.11A.1Identificationsummary.11A.1.1Protocolconformancetestreport.11A.1.2IUTidentification.11A.1.3Testingenvironment.11A.1.4Limitsandreservations.12A.1.5Comments.12A.2IUTconformancestatus.12A.3Staticconformancesummary.12A.4Dynamicconformancesummary.12A.5Staticconformancereviewreport.13A.6Testcampaignreport.14A.7Observations.15AnnexB(normative):PartialPIXITproforma.16B.1Identificationsummary.16B.2Abstracttestsuitesummary.16B.3Testlaboratory.16B.4Client(ofthetestlaboratory).17B.5SystemUnderTest(SUT).17B.6Protocolinformation.18B.6.1Protocolidentification.18B.6.2IUTinformation.18SIST EN 301 001-6 V1.1.4:2005

ETSIETSIEN301001-6V1.1.4(1999-11)4B.6.2.1Parametervalues.18B.6.2.2ConfigurationofIUT.18B.6.2.3Timervalues.19B.6.2.4Numberinformationparametervalues.20B.7Parametervalues-informationelementcodings.20AnnexC(normative):AbstractTestSuite(ATS).21C.1TheTTCNGraphicalform(TTCN.GR).21C.2TheTTCNMachineProcessableform(TTCN.MP).21Bibliography.22History.23SIST EN 301 001-6 V1.1.4:2005

ETSIETSIEN301001-6V1.1.4(1999-11)5IntellectualPropertyRightsIPRsessentialorpotentiallyessentialtothepresentdocumentmayhavebeendeclaredtoETSI.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)hasbeenproducedbyETSITechnicalCommitteeSignallingProtocolandSwitching(SPS).Thepresentdocumentispart6ofamulti-partstandardcoveringtheIntegratedServicesDigitalNetwork(ISDN);OutgoingCallBarring(OCB)supplementaryservices;DigitalSubscriberSignallingSystemNo.one(DSS1)protocol,asdescribedbelow:Part1:"Protocolspecification";Part2:"ProtocolImplementationConformanceStatement(PICS)proformaspecification";Part3:"TestSuiteStructureandTestPurposes(TSS&TP)specificationfortheuser";Part4:"AbstractTestSuite(ATS)andpartialProtocolImplementationeXtraInformationforTesting(PIXIT)proformaspecificationfortheuser";Part5:"TestSuiteStructureandTestPurposes(TSS&TP)specificationforthenetwork";Part6:"AbstractTestSuite(ATS)andpartialProtocolImplementationeXtraInformationforTesting(PIXIT)proformaspecificationforthenetwork".NationaltranspositiondatesDateofadoptionofthisEN:26November1999DateoflatestannouncementofthisEN(doa):29February2000DateoflatestpublicationofnewNationalStandardorendorsementofthisEN(dop/e):31August2000DateofwithdrawalofanyconflictingNationalStandard(dow):31August2000SIST EN 301 001-6 V1.1.4:2005

ETSIETSIEN301001-6V1.1.4(1999-11)61ScopeThepresentdocumentspecifiestheAbstractTestSuite(ATS)andpartialProtocolImplementationeXtraInformationforTesting(PIXIT)proformafortheNetworksideoftheTreferencepointorcoincidentSandTreferencepointofimplementationsconformingtothestagethreestandardfortheOutgoingCallBarring(OCB)supplementaryserviceforthepan-EuropeanIntegratedServicesDigitalNetwork(ISDN)bymeansoftheDigitalSubscriberSignallingSystemNo.one(DSS1)protocol,EN301001-1[1].EN301001-5[3]specifiestheTestSuiteStructureandTestPurposes(TSS&TP)relatedtothisATSandpartialPIXITproformaspecification.OtherpartsspecifytheTSS&TPandtheATSandpartialPIXITproformafortheUsersideoftheTreferencepointorcoincidentSandTreferencepointofimplementationsconformingtoEN301001-1[1]2ReferencesThefollowingdocumentscontainprovisionswhich,throughreferenceinthistext,constituteprovisionsofthepresentdocument.• Referencesareeitherspecific(identifiedbydateofpublication,editionnumber,versionnumber,etc.)ornon-specific.• Foraspecificreference,subsequentrevisionsdonotapply.• Foranon-specificreference,subsequentrevisionsdoapply.• Anon-specificreferencetoanETSshallalsobetakentorefertolaterversionspublishedasanENwiththesamenumber.[1]EN301001-1(V1.2):"IntegratedServicesDigitalNetwork(ISDN);OutgoingCallBarring(OCB)supplementaryservices;DigitalSubscriberSignallingSystemNo.one(DSS1)protocol;Part1:Protocolspecification".[2]EN301001-2(V1.2):"IntegratedServicesDigitalNetwork(ISDN);OutgoingCallBarring(OCB)supplementaryservices;DigitalSubscriberSignallingSystemNo.one(DSS1)protocol;Part2:ProtocolImplementationConformanceStatement(PICS)proformaspecification".[3]EN301001-5(V1.1):"IntegratedServicesDigitalNetwork(ISDN);OutgoingCallBarring(OCB)supplementaryservices;DigitalSubscriberSignallingSystemNo.one(DSS1)protocol;Part5:TestSuiteStructureandTestPurposes(TSS&TP)specificationforthenetwork".[4]EN300196-1:"IntegratedServicesDigitalNetwork(ISDN);Genericfunctionalprotocolforthesupportofsupplementaryservices;DigitalSubscriberSignallingSystemNo.one(DSS1)protocol;Part1:Protocolspecification".[5]ISO/IEC9646:"Informationtechnology-OpenSystemsInterconnection-ConformanceTestingMethodologyandFramework"(allparts).[6]TR101101(V1.1):"MethodsforTestingandSpecification(MTS);TTCNinterimversionincludingASN.11994support[ISO/IEC9646-3](SecondEditionMock-upforJTC1/SC21Review)".[7]ISO/IEC8825-1:"Informationtechnology-ASN.1encodingrules:SpecificationofBasicEncodingRules(BER),CanonicalEncodingRules(CER)andDistinguishedEncodingRules(DER)"(seealsoITU-TRecommendationX.690:1994).SIST EN 301 001-6 V1.1.4:2005

ETSIETSIEN301001-6V1.1.4(1999-11)73Definitionsandabbreviations3.1DefinitionsForthepurposesofthepresentdocument,thetermsanddefinitionsgiveninISO/IEC9646[5]apply.3.2AbbreviationsForthepurposesofthepresentdocument,thefollowingabbreviationsapply:ATSAbstractTestSuiteBERBasicEncodingRulesETSExecutableTestSuiteIUTImplementationUnderTestLTLowerTesterMOTMeansOfTestingOCBOutgoingCallBarringPCOPointofControlandObservationPCTRProtocolConformanceTestReportPDUProtocolDataUnitPICSProtocolImplementationConformanceStatementPIXITProtocolImplementationeXtraInformationforTestingSUTSystemUnderTestTPTestPurposeTTCNTreeandTabularCombinedNotation4AbstractTestMethodTheremotetestmethodisappliedfortheOCBnetworkATS.APointofControlandObservation(PCO)residesattheserviceaccesspointbetweenlayers2and3inthetestsystem.ThisPCOisnamed"L"(forLower).TheLPCOisusedtocontrolandobservethebehaviouroftheImplementationUnderTest(IUT)andtestcaseverdictsareassigneddependingonthebehaviourobservedatthisPCO.Asecond"informal"PCO,called"O"(forOperator)isusedtospecifycontrolbutnotobservationabovetheIUT;eventsatthisPCOareneverusedtogeneratetestcaseverdicts.MessagessentbythetesteratthisPCOexplicitlyindicatetotheoperatoractionswhicharetobeperformedontheSUT.Thisisregardedasapreferredalternativetotheuseoftheimplicitsendevent.SIST EN 301 001-6 V1.1.4:2005

ETSIETSIEN301001-6V1.1.4(1999-11)8TesterInformaltestco-ordinationbyoperatorSUTUpperlayer(s)PCOOLTIUTPCOLLayer2Layer2Layer1Layer1ServiceproviderFigure1:RemotetestmethodwithPCOOfortestco-ordination5UntestabletestpurposesTherearenountestabletestpurposesassociatedwiththisATS.6ATSconventions6.1VersionofTTCNusedTheversionofTTCNusedisthatdefinedinTR101101[6].6.2UseofASN.16.2.1SituationswhereASN.1isusedASN.1hasbeenusedforthreemajorreasons.First,typesdefinedinASN.1canmodelproblemsthat"pure"TTCNcannot.Forinstance,datastructuresmodellingorderedorunorderedsequencesofdataarepreferablydefinedinASN.1.Second,ASN.1providesabetterrestrictionmechanismfortypedefinitionsbyusingsub-typedefinitions.Third,itisnecessarytouseASN.1toreproducethetypedefinitionsforremoteoperationcomponentsspecifiedinthebasestandardsinASN.1.ThepossibilitytouseTTCNandASN.1incombinationisused,i.e.referringtoanASN.1typefromaTTCNtype.6.2.2SpecificationofencodingrulesThereisavariationintheencodingrulesappliedtoASN.1typesandconstraintsspecifiedinthisATSandthereforeamechanismisneededtodifferentiatetheencodingrules.HoweverthemechanismspecifiedinISO/IEC9646-3/AM2[5]andinTR101101[6]doesnotfacilitatedefinitionoftheencodingrulesasneededforthisATS.AsolutionisthereforeusedwhichisbroadlyinthespiritofISO/IEC9646-3/AM2[5]inwhichcommentfieldshavebeenusedasameansofencodingrules.SIST EN 301 001-6 V1.1.4:2005

ETSIETSIEN301001-6V1.1.4(1999-11)9ForASN.1usedinthisATS,twovariationsofencodingrulesareused.OneisthecommonlyknownBasicEncodingRules(BER)asspecifiedinISO/IEC8825-1[7].InthesecondcasetheencodingisaccordingtoISDN,i.e.theASN.1datatypesarearepresentationofstructurescontainedwithintheISDNspecification(basiccall,Genericfunctionalprotocolorindividualsupplementaryservice).Forexample,ifoctetsofaninformationelementarespecifiedinASN.1asaSEQUENCEthenthisshouldbeencodedinanExecutableTestSuite(ETS)asanyotherISDNinformationelementspecifiedusingtabularTTCN.ThisISDNencodingvariationisthedefaultencodingruleforthisATS.ThismeansthatallASN.1constrainttablesareencodedusingISDN(non-BER)encodingunlessstatedotherwise.BERencodingshouldneverbeappliedtoanASN.1constraintwhereBERencodinghasnotbeenspecified.Thisencodingruleissometimesnamed"DirectEncoding".ForBERencoding,anindicationisgiveninthecommentsfieldofthetableheader.ForthisATSsuchindicationsappearintheASN.1typeconstraintdeclarationtablesonly.Inthefirstlineofthetableheadercommentfield,thenotation"ASN1_Encoding:BER"isused.NOTE:WithinBER,thereareanumberofvariationsfortheencodingoflengthsoffields.AccordingtoEN300196-1[4],anIUTshouldbeabletointerpretalllengthformswithinBERforreceivedPDUs.WhensendingPDUscontainingBERencoding,EN300196-1[4]givesguidelinesbutmakesnorestrictionsonthelengthformswithinBERwhichanIUTmayapply.InthisparticularATSallASN.1typeconstraintswhichareoftype"Component"aretobeencodedusingBER.Table1:ASN.1typeconstraintdeclarationshowinguseofencodingvariationASN.1TypeConstraintDeclarationConstraintName:DeactInv2(SERVED_NR:ServedUserNr)ASN.1Type:ComponentDerivationPath:Comments:ASN1_Encoding:BEROCBDeactivateInvokecomponentDescriptiondeactivateOcb_ComponentsdeactivateOcb_InvokeComp{invokeID?,operation_valueglobalValuedeactivateOcb,argument{basicserviceallServicespinPX_PinservedUserNrSERVED_NR,}}Detailedcomments:7ATStoTPmapTheidentifiersusedfortheTPsarereusedastestcasenames.Thusthereisastraightforwardone-to-onemapping.8PCTRconformanceAtestlaboratory,whenrequestedbyaclienttoproduceaPCTR,isrequired,asspecifiedinISO/IEC9646-5[5],toproduceaPCTRconformantwiththePCTRtemplategiveninannexBofISO/IEC9646-5[5].Furthermore,atestlaboratory,offeringtestingfortheATSspecificationcontainedinannexC,whenrequestedbyaclienttoproduceaPCTR,isrequiredtoproduceaPCTRconformantwiththePCTRproformacontainedinannexAofthepresentdocument.APCTRwhichconformstothisPCTRproformaspecificationshallpreservethecontentandorderingoftheclausescontainedinannexA.ClauseA.6ofthePCTRmaycontainadditionalcolumns.Ifincluded,theseshallbeplacedtotherightoftheexistingcolumns.Textinitalicsmayberetainedbythetestlaboratory.SIST EN 301 001-6 V1.1.4:2005

ETSIETSIEN301001-6V1.1.4(1999-11)109PIXITconformanceAtestrealizer,producinganexecutabletestsuitefortheATSspecificationcontainedinannexC,isrequired,asspecifiedinISO/IEC9646-4[5],toproduceanaugmentedpartialPIXITproformaconformantwiththispartialPIXITproformaspecification.AnaugmentedpartialPIXITproformawhichconformstothispartialPIXITproformaspecificationshall,asaminimum,havecontentswhicharetechnicallyequivalenttoannexB.TheaugmentedpartialPIXITproformamaycontainadditionalquestionsthatneedtobeansweredinordertopreparetheMeansOfTesting(MOT)foraparticularIUT.Atestlaboratory,offeringtestingfortheATSspecificationcontainedinannexC,isrequired,asspecifiedinISO/IEC9646-5[5],tofurtheraugmenttheaugmentedpartialPIXITproformatoproduceaPIXITproformaconformantwiththispartialPIXITproformaspecification.APIXITproformawhichconformstothispartialPIXITproformaspecificationshall,asaminimum,havecontentswhicharetechnicallyequivalenttoannexB.ThePIXITproformamaycontainadditionalquestionsthatneedtobeansweredinordertopreparethetestlaboratoryforaparticularIUT.10ATSconformanceThetestrealizer,producingMOTandExTSforthisATSspecification,shallcomplywiththerequirementsofISO/IEC9646-4[5],Inparticular,theseconcerntherealizationofanExTSbasedoneachATS.ThetestrealizershallprovideastatementofconformanceoftheMOTtothisATSspecification.AnExTSwhichconformstothisATSspecificationshallcontaintestgroupsandtestcaseswhicharetechnicallyequivalenttothosecontainedintheATSinannexC.Allsequencesoftesteventscomprisinganabstracttestcaseshallbecapableofbeingrealizedintheexecutabletestcase.AnyfurthercheckingwhichthetestsystemmightbecapableofperformingisoutsidethescopeofthisATSspecificationandshallnotcontributetotheverdictassignmentf
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