SIST EN 301 067-6 V1.1.3:2003
(Main)Broadband Integrated Services Digital Network (B-ISDN); Digital Subscriber Signalling System No. two (DSS2) protocol; Connection characteristics; Negotiation during call/connection establishment phase; Part 6: Abstract Test Suite (ATS) and partial Protocol Implementation eXtra Information for Testing (PIXIT) proforma specification for the network
- Abstract
Develop part 6 (ATSS & PIXIT for the network) of EN 301 067
- Status
- Published
- Publication Date
- 30-Nov-2003
- Current Stage
- 6060 - National Implementation/Publication (Adopted Project)
- Start Date
- 01-Dec-2003
- Due Date
- 01-Dec-2003
- Completion Date
- 01-Dec-2003
- Mandate
- M/213
SIST EN 301 067-6 V1.1.3:2003 is the network-side test companion to EN 301 067-1 for Broadband Integrated Services Digital Network (B-ISDN) DSS2 signalling. It specifies the Abstract Test Suite (ATS) and partial Protocol Implementation eXtra Information for Testing (PIXIT) proforma used to assess negotiation during call/connection establishment at the user-network interface.
This part is for testers, laboratories, and implementers who need to prepare conformance tests for the network side at the TB reference point or coincident SB/TB reference point. It tells them what to test, what information to collect before testing, and how the results are reported.
What does SIST EN 301 067-6 V1.1.3:2003 specify?
SIST EN 301 067-6 V1.1.3:2003 specifies the network ATS for implementations of the DSS2 protocol connection characteristics negotiation procedure during call/connection establishment. It also provides the partial PIXIT proforma needed to set up testing and the structure for reporting test results.
| Annex | What it covers |
|---|---|
| Annex A | Protocol Conformance Test Report (PCTR) proforma |
| Annex B | Partial PIXIT proforma |
| Annex C | Abstract Test Suite (ATS) in TTCN forms |
The scope is limited to the network IUT at the user-network interface. The document is organized into clauses for definitions, the abstract test method, conformance statements, and then the three normative annexes.
What are the key requirements of SIST EN 301 067-6 V1.1.3:2003?
The network IUT is treated as the DSS2 protocol entity at one particular user-network interface, not as the whole network. In practice, this means the test object is the protocol behaviour seen at the interface under test.
The ATS uses a combination of remote and multi-party test methods. Clause 4 explains that the Main Test Component (MTC) controls the test and that one or more Parallel Test Components (PTCs) may be used to stimulate other interfaces. This matters because some messages are triggered by events at another interface, but the verdict is still assigned from the interface under test.
The lower tester at PCO L0 is the point from which verdicts are assigned. Clause 4.1 states that behaviour observed only on the auxiliary PCOs does not by itself determine a pass or fail result. In practice, a missing network message after a stimulus at another interface may lead to an INCONCLUSIVE verdict rather than FAIL.
Clause 5 states that there are no untestable test purposes in this ATS. Clause 6 maps the test purposes to test cases on a one-to-one basis by reusing the TP identifiers as testcase names. This makes the relationship between test purpose and test case straightforward.
Annex A defines the PCTR content and order. A conformance report must preserve the annex structure, and additional columns may be added only to the right of the existing ones. For a laboratory, this fixes the report format used in delivered evidence.
Annex B defines the partial PIXIT content. It collects protocol identification, the configuration to be tested, test management timers, and parameter values such as bearer capability coding, called party number coding, ATM traffic descriptor values, and preferred VPCI and VCI. In practice, these are the settings the lab needs before it can run the tests.
Clause 9 sets the ATS conformance expectations. The executable test suite must be technically equivalent to the ATS in Annex C, and all abstract test cases must be realizable. Additional checks may be performed by a test system, but they do not count toward the verdict for a test case.
What terms does SIST EN 301 067-6 V1.1.3:2003 define?
Abstract Test Suite (ATS) - The set of abstract test cases that describe the protocol tests in a way that can later be realized in test software.
Protocol Implementation eXtra Information for Testing (PIXIT) - The implementation-specific information needed to prepare the means of testing for a particular system.
Implementation Under Test (IUT) - The protocol implementation being assessed for conformance.
Main Test Component (MTC) - The test component that controls the test process and observes the interface under test.
Parallel Test Component (PTC) - A companion test component used to handle other interfaces during a multi-party test.
Point of Control and Observation (PCO) - The interface point where the test system controls and observes protocol behaviour.
Who uses SIST EN 301 067-6 V1.1.3:2003?
Conformance test laboratories use this standard to build and run the ATS and to complete PCTR and PIXIT documents. Test realizers use it when creating an Executable Test Suite (ExTS) and the Means of Testing (MOT). Network equipment providers and protocol implementers use it to prepare for conformance testing against EN 301 067-1.
Which standards are used with SIST EN 301 067-6 V1.1.3:2003?
- EN 301 067-1 - The protocol specification being tested.
- EN 301 067-2 - The PICS proforma used with the protocol family.
- EN 301 067-4 - The user-side ATS and partial PIXIT companion part.
- EN 301 067-5 - The network-side Test Suite Structure and Test Purposes (TSS&TP).
- EN 300 443-1 and EN 300 443-2 - Related DSS2 basic call/bearer control specifications and PICS proforma.
- ISO/IEC 9646-1 to 9646-5 - The conformance testing framework, ATS specification, TTCN notation, test realization, and laboratory requirements.
- ITU-T Recommendation I.413 - The B-ISDN user-network interface reference.
What does the SIST EN 301 067-6 V1.1.3:2003 document contain?
Annex A contains a report template with identification, testing environment, static and dynamic conformance summaries, and a test campaign report table. Annex B contains tables for test laboratory details, SUT identification, configuration to be tested, timers, and protocol parameter values. Annex C contains the ATS in Tree and Tabular Combined Notation (TTCN), with both TTCN graphical and machine-processable forms referenced.
The body of the document also explains the test setup with figures showing the multi-party arrangement and the combined remote/multi-party method. That is the practical basis for how the network interface is stimulated and observed during testing.
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Frequently Asked Questions
SIST EN 301 067-6 V1.1.3:2003 is a standard published by the Slovenian Institute for Standardization (SIST). Its full title is "Broadband Integrated Services Digital Network (B-ISDN); Digital Subscriber Signalling System No. two (DSS2) protocol; Connection characteristics; Negotiation during call/connection establishment phase; Part 6: Abstract Test Suite (ATS) and partial Protocol Implementation eXtra Information for Testing (PIXIT) proforma specification for the network". This standard covers: Develop part 6 (ATSS & PIXIT for the network) of EN 301 067
Develop part 6 (ATSS & PIXIT for the network) of EN 301 067
SIST EN 301 067-6 V1.1.3:2003 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 301 067-6 V1.1.3:2003 is associated with the following European legislation: Standardization Mandates: M/213. When a standard is cited in the Official Journal of the European Union, products manufactured in conformity with it benefit from a presumption of conformity with the essential requirements of the corresponding EU directive or regulation.
SIST EN 301 067-6 V1.1.3:2003 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.Broadband Integrated Services Digital Network (B-ISDN); Digital Subscriber Signalling System No. two (DSS2) protocol; Connection characteristics; Negotiation during call/connection establishment phase; 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 301 067-6 Version 1.1.3SIST EN 301 067-6 V1.1.3:2003en01-december-2003SIST EN 301 067-6 V1.1.3:2003SLOVENSKI
STANDARD
ETSIEN301067-6V1.1.3(1999-11)EuropeanStandard(Telecommunicationsseries)BroadbandIntegratedServicesDigitalNetwork(B-ISDN);DigitalSubscriberSignallingSystemNo.two(DSS2)protocol;Connectioncharacteristics;Negotiationduringcall/connectionestablishmentphase;Part6:AbstractTestSuite(ATS)andpartialProtocolImplementationeXtraInformationforTesting(PIXIT)proformaspecificationforthenetworkSIST EN 301 067-6 V1.1.3:2003
ETSIETSIEN301067-6V1.1.3(1999-11)2ReferenceDEN/SPS-05151-6(9vpi0ie0.PDF)KeywordsATM,ATS,B-ISDN,broadband,DSS2,ISDN,network,PIXIT,UNIETSIPostaladdressF-06921SophiaAntipolisCedex-FRANCEOfficeaddress650RoutedesLucioles-SophiaAntipolisValbonne-FRANCETel.:+33492944200Fax:+33493654716SiretN°34862356200017-NAF742CAssociationàbutnonlucratifenregistréeàlaSous-PréfecturedeGrasse(06)N°7803/88Internetsecretariat@etsi.frIndividualcopiesofthisETSIdeliverablecanbedownloadedfromhttp://www.etsi.orgIfyoufinderrorsinthepresentdocument,sendyourcommentto:editor@etsi.frImportantnoticeThisETSIdeliverablemaybemadeavailableinmorethanoneelectronicversionorinprint.Inanycaseofexistingorperceiveddifferenceincontentsbetweensuchversions,thereferenceversionisthePortableDocumentFormat(PDF).Incaseofdispute,thereferenceshouldbetheprintingonETSIprintersofthePDFversionkeptonaspecificnetworkdrivewithinETSISecretariat.CopyrightNotificationNopartmaybereproducedexceptasauthorizedbywrittenpermission.Thecopyrightandtheforegoingrestrictionextendtoreproductioninallmedia.©EuropeanTelecommunicationsStandardsInstitute1999.Allrightsreserved.SIST EN 301 067-6 V1.1.3:2003
ETSIETSIEN301067-6V1.1.3(1999-11)3ContentsIntellectualPropertyRights.5Foreword.51Scope.62References.63Definitionsandabbreviations.73.1Definitions.73.1.1Definitionsrelatedtoconformancetesting.73.1.2DefinitionsrelatedtoEN301067-1.73.2Abbreviations.84AbstractTestMethod(ATM).84.1ConventionsfortestcomponentsandPCOs.95Untestabletestpurposes.106ATStoTPmap.107PCTRconformance.108PIXITconformance.119ATSConformance.11AnnexA(normative):ProtocolConformanceTestReport(PCTR)proforma.12A.1Identificationsummary.12A.1.1Protocolconformancetestreport.12A.1.2IUTidentification.12A.1.3Testingenvironment.12A.1.4Limitsandreservations.12A.1.5Comments.13A.2IUTConformancestatus.13A.3Staticconformancesummary.13A.4Dynamicconformancesummary.14A.5Staticconformancereviewreport.14A.6Testcampaignreport.15A.7Observations.15AnnexB(normative):PartialPIXITproforma.16B.1Identificationsummary.16B.2Abstracttestsuitesummary.16B.3Testlaboratory.16B.4Client(oftheTestLaboratory).17B.5SUT.17B.6Protocolinformation.18B.6.1Protocolidentification.18B.6.2Configurationtobetested.18B.6.3Testmanagementtimers.18B.6.4ParameterValues.19SIST EN 301 067-6 V1.1.3:2003
ETSIETSIEN301067-6V1.1.3(1999-11)4AnnexC(normative):AbstractTestSuite(ATS).20C.1TheTTCNGraphicalform(TTCN.GR).20C.1TheTTCNMachineProcessableform(TTCN.MP).20Bibliography.21History.22SIST EN 301 067-6 V1.1.3:2003
ETSIETSIEN301067-6V1.1.3(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-partENcoveringtheBroadbandIntegratedServicesDigitalNetwork(B-ISDN);DigitalSubscriberSignallingSystemNo.two(DSS2)protocol;Connectioncharacteristics;Negotiationduringcall/connectionestablishmentphase,asdescribedbelow:Part1:"Protocolspecification[ITU-TRecommendationQ.2962(1996),modified]";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 301 067-6 V1.1.3:2003
ETSIETSIEN301067-6V1.1.3(1999-11)61ScopeThepresentdocumentspecifiesthenetworkAbstractTestSuite(ATS)fortheTBreferencepointorcoincidentSBandTBreferencepoint(asdefinedinITU-TRecommendationI.413[12])ofimplementationsconformingtothestandardsforthesignallinguser-networklayer3specificationforNegotiationduringcall/connectionestablishmentphaseoftheDigitalSubscriberSignallingSystemNo.two(DSS2)protocolforthepan-EuropeanBroadbandIntegratedServicesDigitalNetwork(B-ISDN),EN301067-1[1].AfurtherpartofthepresentdocumentspecifiestheTestSuiteStructureandTestPurposes(TSS&TP)relatedtothisATSandpartialPIXITproforma.OtherpartsspecifytheTSS&TPandtheATSandpartialPIXITproformafortheUsersideoftheTBreferencepointorcoincidentSBandTBreferencepointofimplementationsconformingtoEN301067-1[1].2ReferencesThefollowingdocumentscontainprovisionswhich,throughreferenceinthistext,constituteprovisionsofthepresentdocument.• Referencesareeitherspecific(identifiedbydateofpublication,editionnumber,versionnumber,etc.)ornon-specific.• Foraspecificreference,subsequentrevisionsdonotapply.• Foranon-specificreference,thelatestversionapplies.• Anon-specificreferencetoanETSshallalsobetakentorefertolaterversionspublishedasanENwiththesamenumber.[1]EN301067-1(V1.1):"BroadbandIntegratedServicesDigitalNetwork(B-ISDN);DigitalSubscriberSignallingSystemNo.two(DSS2)protocol;Connectioncharacteristics;Negotiationduringcall/connectionestablishmentphase;Part1:Protocolspecification[ITU-TRecommendationQ.2962(1996),modified]".[2]EN301067-2(V1.1):"BroadbandIntegratedServicesDigitalNetwork(B-ISDN);DigitalSubscriberSignallingSystemNo.two(DSS2)protocol;Connectioncharacteristics;Negotiationduringcall/connectionestablishmentphase;Part2:ProtocolImplementationConformanceStatement(PICS)proformaspecification".[3]EN301067-4(V1.1):"BroadbandIntegratedServicesDigitalNetwork(B-ISDN);DigitalSubscriberSignallingSystemNo.two(DSS2)protocol;Connectioncharacteristics;Negotiationduringcall/connectionestablishmentphase;Part4:AbstractTestSuite(ATS)andpartialProtocolImplementationeXtraInformationforTesting(PIXIT)proformaspecificationfortheuser".[4]EN301067-5(V1.1):"BroadbandIntegratedServicesDigitalNetwork(B-ISDN);DigitalSubscriberSignallingSystemNo.two(DSS2)protocol;Connectioncharacteristics;Negotiationduringcall/connectionestablishmentphase;Part5:TestSuiteStructureandTestPurposes(TSS&TP)specificationforthenetwork".[5]EN300443-1:"BroadbandIntegratedServicesDigitalNetwork(B-ISDN);DigitalSubscriberSignallingSystemNo.two(DSS2)protocol;B-ISDNuser-networkinterfacelayer3specificationforbasiccall/bearercontrol;Part1:Protocolspecification[ITU-TRecommendationQ.2931(1995),modified]".[6]EN300443-2:"BroadbandIntegratedServicesDigitalNetwork(B-ISDN);DigitalSubscriberSignallingSystemNo.two(DSS2)protocol;B-ISDNuser-networkinterfacelayer3specificationforbasiccall/bearercontrol;Part2:ProtocolImplementationConformanceStatement(PICS)proformaspecification".[7]ISO/IEC9646-1(1994):"Informationtechnology-OpenSystemsInterconnection-Conformancetestingmethodologyandframework-Part1:Generalconcepts".SIST EN 301 067-6 V1.1.3:2003
ETSIETSIEN301067-6V1.1.3(1999-11)7[8]ISO/IEC9646-2(1994):"Informationtechnology-OpenSystemsInterconnection-Conformancetestingmethodologyandframework-Part2:AbstractTestSuitespecification".[9]ISO/IEC9646-3(1998):"Informationtechnology-OpenSystemsInterconnection-Conformancetestingmethodologyandframework-Part3:TheTreeandTabularCombinedNotation(TTCN)".[10]ISO/IEC9646-4(1994):"Informationtechnology-OpenSystemsInterconnection-Conformancetestingmethodologyandframework-Part4:Testrealization".[11]ISO/IEC9646-5(1994):"Informationtechnology-OpenSystemsInterconnection-Conformancetestingmethodologyandframework-Part5:Requirementsontestlaboratoriesandclientsfortheconformanceassessmentprocess".[12]ITU-TRecommendationI.413(1993):"B-ISDNuser-networkinterface".3Definitionsandabbreviations3.1DefinitionsForthepurposesofthepresentdocument,thefollowingtermsanddefinitionsapply,inadditiontothosegiveninEN301067-1[1]andEN300443-1[5].3.1.1DefinitionsrelatedtoconformancetestingAbstracttestcase:RefertoISO/IEC9646-1[7]AbstractTestMethod(ATM):RefertoISO/IEC9646-1[7]AbstractTestSuite(ATS):RefertoISO/IEC9646-1[7]ImplementationUnderTest(IUT):RefertoISO/IEC9646-1[7]SystemUnderTest(SUT):SeeISO/IEC9646-1[7]UpperTester(UT):SeeISO/IEC9646-1[7]Lowertester:RefertoISO/IEC9646-1[7]ProtocolImplementationConformanceStatement(PICS):RefertoISO/IEC9646-1[7]PICSproforma:RefertoISO/IEC9646-1[7]ProtocolImplementationeXtraInformationforTesting(PIXIT):RefertoISO/IEC9646-1[7]PIXITproforma:RefertoISO/IEC9646-1[7]TestPurpose(TP):RefertoISO/IEC9646-1[7]PointofControlandObservation(PCO):SeeISO/IEC9646-1[7]3.1.2DefinitionsrelatedtoEN301067-1user:DSS2protocolentityattheUsersideoftheuser-networkinterfacewhereaTBreferencepointorcoincidentSBandTBreferencepointappliesuser(SB/TB):DSS2protocolentityattheUsersideoftheuser-networkinterfacewhereacoincidentSBandTBreferencepointappliesuser(TB):DSS2protocolentityattheUsersideoftheuser-networkinterfacewhereaTBreferencepointapplies(userisaprivateISDN)SIST EN 301 067-6 V1.1.3:2003
ETSIETSIEN301067-6V1.1.3(1999-11)83.2AbbreviationsForthepurposesofthepresentdocument,thefollowingabbreviationsapply:ATMAbstractTestMethodATSAbstractTestSuiteB-ISDNBroadbandIntegratedServicesDigitalNetworkCMCoordinationMessagesDSS2DigitalSubscriberSignallingSystemNo.twoExTSExecutableTestSuiteIUTImplementationUnderTestLTLowerTesterMOTMeansOfTestingMTCMainTestComponentPCOPointofControlandObservationPDUProtocolDataUnitPICSProtocolImplementationConformanceStatementPIXITProtocolImplementationeXtraInformationforTestingPTCParallelTestComponentsSUTSystemUnderTestTPTestPurposeTSSTestSuiteStructureTTCNTreeandTabularCombinedNotationUTUpperTesterVCIVirtualChannelIdentifierVPCIVirtualPathConnectionIdentifier4AbstractTestMethod(ATM)TherequirementfortestingthenetworkIUTistofocusonthebehaviourofthenetworkIUTattheuser-networkinterfacewhereaTBreferencepointorcoincidentSBandTBreferencepointapplies.ThustheIUTisthenetworkDSS2protocolentityataparticularuser-networkinterfaceandisnotthewholenetwork.ItispossibletospecifyanATSbasedonaSingleparty(remote)testmethodforsuchanIUT.However,itisconsideredthatanATSbasedonsuchanapproachisoflimiteduseastheonlywaytospecifyIUTgeneratedPDUsistousethe"implicitsend"statement.ManyusersofsuchanATSwouldreplacethe"implicitsend"statementswithdescriptionsofthebehaviouratotherinterfaces.AnATSbasedonamulti-partytestmethodisconsideredtobemoreusefulinthatitisclosertohowarealtestsuitewouldbeconstructed.Suchatestmethodspecifiesbehaviouratmultiplenetworkinterfaces.Oneveryimportantlimitationhereisthattestsarefocussedononeparticularinterface.ThusthetestsystemismadeuponeMainTestComponent(MTC)andoneormoreParallelTestComponents(PTC),seefigure1.SIST EN 301 067-6 V1.1.3:2003
ETSIETSIEN301067-6V1.1.3(1999-11)94.1ConventionsfortestcomponentsandPCOsMasterpartSlavepartMTCAPTC1A1(CP)L0(PCO)L1(PCO)IUTNETWORKFigure1:Multi-partytestmethodInamaster/slavearrangement,theMTCisconsideredtobethemasterwhilethePTCsaretheslaves.The"slave"testersareonlyanexplicitdescriptionofhowtodealwiththeremoteinterfacesduringthetestingprocess,i.e."howtomaketheIUTsendtherequiredmessage".Thismeans,inparticular,thattheverdictwillonlybeassignedfromtheprotocolaspectsobservedontheinterfaceundertest(i.e.bythe"master"tester),asitwouldbeobservedbyaterminalconnectedtothisinterface.Afailureinthecorrelationbetweentheprotocolatthedifferentinterfacestowhichthedifferenttestersareconnected,i.e.inthemechanismofthefunctionalserviceitself,willnotcauseaFAILverdict.Forinstance,iftheIUTfailstosendamessageonthetestedinterfaceafteranotherinterfacehasreceivedtheproperstimulus,theverdictwillbeINCONCLUSIVE.TheMTCMTCAhastwofunctionsinthisconfiguration.Firstly,ithastheMTCfunctionofcontrollingtheoneormorePTCs.ThusitisresponsibleforstartingthePTCsandafterwardscoordinatesactivitiesbyexchangingCoordinationMessages(CM)withthePTCs.SecondlyitisresponsibleforthebehaviouroftheLowerTester(LT)atPCOL0.Acombinationoftheremoteandmulti-partytestmethodsisapplied.Ascanbeseenfromfigure1,severalPCOsareused.AllPCOsresideattheserviceaccesspointsbetweenlayers2and3.SIST EN 301 067-6 V1.1.3:2003
ETSIETSIEN301067-6V1.1.3(1999-11)10MTCSUTPTC1Layer3Layer2Layer1L0IUTL1Layer3Layer2Layer1ServiceproviderFigure2:Combinationoftheremoteandmulti-partytestmethodsTheMTCPCOisnamed"L0"("L"forLower).TheL0PCOisusedtocontrolandobservethebehaviouroftheIUTandtestcaseverdictsareassigneddependingonthebehaviourobservedatthisPCO.ThePTCsPTC1,PTC2etc.usePCOsL1,L2etc.ThesePCOsareusedtocontroland,inalimitedway,observethebehaviourofthenetworkequipmentatinterfacesotherthantheoneundertest.NoverdictsareassignedatthesePCOs.Asstatedinapreviousparagraph,thenon-receiptofnetworkgeneratedmessagesatL0,whicharestimulatedbyeventsattheL1,L2etc.,willresultinINCONCLUSIVEratherthanFAILverdictsbeingassigned.PTC2isonlyactivatedinthattestcasesthattesttheproceduresattheaccessbetweenarootuserandtheIUT,whenmorethanonepartyisinvolvedinthecallbetweentherootuserandtheIUT.IntestcaseswhichverifythattheIUTrejectsinvalidorunacceptableSETUPmessages,noPTCisactivatedatall,astheserejectionproceduresareconsideredlocaltotheaccessbetweenIUTandMTC.5UntestabletestpurposesTherearenountestabletestpurposesassociatedwiththisATS.6ATStoTPmapTheidentifiersusedfortheTPs(seeEN301067-5[4])arereusedastestcasenames.Thusthereisastraightforwardone-to-onemapping.7PCTRconformanceAtestlaboratory,whenrequestedbyaclienttoproduceaPCTR,isrequired,asspecifiedinISO/IEC9646-5[11],toproduceaPCTRconformantwiththePCTRtemplategi
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