ETSI EN 300 462-7-1 V1.1.2 (2001-06)

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Transmission and Multiplexing (TM); Generic requirements for synchronization networks; Part 7-1: Timing characteristics of slave clocks suitable for synchronization supply to equipment in local node applications33.040.20Prenosni sistemTransmission systemsICS:Ta slovenski standard je istoveten z:EN 300 462-7-1 Version 1.1.2SIST EN 300 462-7-1 V1.1.2:2003en01-december-2003SIST EN 300 462-7-1 V1.1.2:2003SLOVENSKI
STANDARD



SIST EN 300 462-7-1 V1.1.2:2003



ETSIEN300462-7-1V1.1.2(2001-06)EuropeanStandard(Telecommunicationsseries)TransmissionandMultiplexing(TM);Genericrequirementsforsynchronizationnetworks;Part7-1:TimingcharacteristicsofslaveclockssuitableforsynchronizationsupplytoequipmentinlocalnodeapplicationsSIST EN 300 462-7-1 V1.1.2:2003



ETSIETSIEN300462-7-1V1.1.2(2001-06)2ReferenceDEN/TM-01057-7-1Keywordsnetwork,synchronization,transmissionETSI650RoutedesLuciolesF-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.©EuropeanTelecommunicationsStandardsInstitute2001.Allrightsreserved.SIST EN 300 462-7-1 V1.1.2:2003



ETSIETSIEN300462-7-1V1.1.2(2001-06)3ContentsIntellectualPropertyRights.4Foreword.41Scope.52References.53Definitionsandabbreviations.63.1Definitions.63.2Abbreviations.64Frequencyaccuracy.75Pull-inandpull-outranges.76Noisegeneration.76.1Wanderinlockedmode.76.2Non-lockedwander.96.3Jitter.96.3.1Outputjitterata2048kHzand2048kbit/sinterface.96.3.2OutputjitterataSynchronousTransportModuleN(STM-N)interface.97Noisetolerance.107.1Jittertolerance.107.2Wandertolerance.118Transfercharacteristic.139Transientresponseandholdoverperformance.139.1Phaseresponseduringinputreferenceswitching.139.2PhaseresponseduringHold-overoperation.149.3Phaseresponsetoinputsignalinterruptions.149.4Phasediscontinuity.1510Interfaces.15AnnexA(informative):Bibliography.16History.17SIST EN 300 462-7-1 V1.1.2:2003



ETSIETSIEN300462-7-1V1.1.2(2001-06)4IntellectualPropertyRightsIPRsessentialorpotentiallyessentialtothepresentdocumentmayhavebeendeclaredtoETSI.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)hasbeenproducedbyETSITechnicalCommitteeTransmissionandMultiplexing(TM).Thepresentdocumentispart7-1ofamulti-partdeliverablecoveringTransmissionandMultiplexing(TM);Genericrequirementsforsynchronizationnetworks,asidentifiedbelow:Part1-1:"Definitionsandterminologyforsynchronizationnetworks";Part2-1:"Synchronizationnetworkarchitecture";Part3-1:"Thecontrolofjitterandwanderwithinsynchronizationnetworks";Part4-1:"TimingcharacteristicsofslaveclockssuitableforsynchronizationsupplytoSynchronousDigitalHierarchy(SDH)andPlesiochronousDigitalHierarchy(PDH)equipment";Part4-2:"TimingcharacteristicsofslaveclockssuitableforsynchronizationsupplytoSynchronousDigitalHierarchy(SDH)andPlesiochronousDigitalHierarchy(PDH)equipment;ImplementationConformanceStatement(ICS)proformaspecification";Part5-1:"TimingcharacteristicsofslaveclockssuitableforoperationinSynchronousDigitalHierarchy(SDH)equipment";Part6-1:"Timingcharacteristicsofprimaryreferenceclocks".Part6-2:"Timingcharacteristicsofprimaryreferenceclocks;ImplementationConformanceStatement(ICS)proformaspecification";Part7-1:"Timingcharacteristicsofslaveclockssuitableforsynchronizationsupplytoequipmentinlocalnodeapplications".NationaltranspositiondatesDateofadoptionofthisEN:1June2001DateoflatestannouncementofthisEN(doa):30September2001DateoflatestpublicationofnewNationalStandardorendorsementofthisEN(dop/e):31March2002DateofwithdrawalofanyconflictingNationalStandard(dow):31March2002SIST EN 300 462-7-1 V1.1.2:2003



ETSIETSIEN300462-7-1V1.1.2(2001-06)51ScopeThepresentdocumentoutlinesrequirementsfortimingdevicescalledSynchronizationSupplyUnitsforlocalnodeapplications(SSU-Ls).ThisSSUisusedinsynchronizingnetworkequipmentintheSynchronousDigitalHierarchy(SDH)transportnetwork,inthePublicSwitchedTelephoneNetwork(PSTN)andinthePublicLandMobileNetworks(PLMN)forlocalnodeapplications.ThelastSSUinaSynchronizationchain,irrespectiveofthetrafficnetwork,providestheapplicationsforthistypeofclock.NOTE:TherequirementsinthepresentdocumentapplyunderenvironmentalconditionsaccordingtooneoftheenvironmentalclassesdefinedinETS300019[1],unlessstatedotherwise.Themanufacturerwillneedtospecifytowhichspecificenvironmentalclasstheequipmentbelongs.AdescriptionoftheSynchronizationSupplyUnit(SSU)logicalfunctionisgiveninfigure1inEN300462-2-1[3].Ingeneral,theSSUwillhavemultipletimingreferenceinputsandintheeventthatalltimingreferencesfail,theSSUshouldbecapableofmaintainingoperation(holdover)withinprescribedperformancelimitsasdetailedinthepresentdocument.TherequirementslaiddowninthepresentdocumentdescribetheminimumperformanceofanSSUappliedasalocalnodeclock(SSU-L).RequirementsfortransitnodeclockapplicationsforSSU'saredescribedinEN300462-4-1[5].TheSSU-LfunctioncanbeimplementedinaseparatepieceofequipmentcalledaStand-AloneSynchronizationEquipment(SASE)oritcanformalogicalfunctionofanotherequipmentsuchasatelephonyexchangeoranSDHcross-connect.Therequirementsspecifiedinthepresentdocumentrefertothedesignofnewsynchronizationnetworksandconsequentlytheydonotnecessarilyrepresenttheperformanceofexistingsynchronizationnetworkandequipment.AtimingdevicewithinSDHequipmentcanalsoconformtoEN300462-5-1[6].ThecharacteristicsrelatedtoholdoverandnoisegenerationperformancemakethistypeofclockalsosuitableforapplicationintheGSMradiosub-system(seeTS100912[7]).InparticularasaclockusedbyaBaseStationController(BSC)orbyaMobileSwitchingCentre(MSC),furthersynchronizing(typicallyviaatrafficlink)theBaseStation(BS).ThecharacteristicsofthisclockarenotoptimizedforaclocktobeimplementedintheBS.InordertofulfilthefrequencyaccuracyrequirementsrequiredintheGSMradiointerface,thisclockshouldbeconnectedtoasynchronizationnetworkthatisproperlydesignedandcorrectlyoperating.2ReferencesThefollowingdocumentscontainprovisionswhich,throughreferenceinthistext,constituteprovisionsofthepresentdocument.• Referencesareeitherspecific(identifiedbydateofpublicationand/oreditionnumberorversionnumber)ornon-specific.• Foraspecificreference,subsequentrevisionsdonotapply.• Foranon-specificreference,thelatestversionapplies.[1]ETSIETS300019:"EquipmentEngineering(EE);Environmentalconditionsandenvironmentaltestsfortelecommunicationsequipment".[2]ETSIEN300462-1-1:"TransmissionandMultiplexing(TM);Genericrequirementsforsynchronizationnetworks;Part1-1:Definitionsandterminologyforsynchronizationnetworks".[3]ETSIEN300462-2-1:"TransmissionandMultiplexing(TM);Genericrequirementsforsynchronizationnetworks;Part2-1:Synchronizationnetworkarchitecture".SIST EN 300 462-7-1 V1.1.2:2003



ETSIETSIEN300462-7-1V1.1.2(2001-06)6[4]ETSIEN300462-3-1:"TransmissionandMultiplexing(TM);Genericrequirementsforsynchronizationnetworks;Part3-1:Thecontrolofjitterandwanderwithinsynchronizationnetworks".[5]ETSIEN300462-4-1:"TransmissionandMultiplexing(TM);Genericrequirementsforsynchronizationnetworks;Part4-1:TimingcharacteristicsofslaveclockssuitableforsynchronizationsupplytoSynchronousDigitalHierarchy(SDH)andPlesiochronousDigitalHierarchy(PDH)equipment".[6]ETSIEN300462-5-1:"TransmissionandMultiplexing(TM);Genericrequirementsforsynchronizationnetworks;Part5-1:TimingcharacteristicsofslaveclockssuitableforoperationinSynchronousDigitalHierarchy(SDH)equipment".[7]ETSITS100912(GSM05.10):"Digitalcellulartelecommunicationssystem(Phase2+);Radiosubsystemsynchronization(3GPPTS05.10version8.8.0Release1999)".[8]ETSIETS300166:"TransmissionandMultiplexing(TM);Physicalandelectricalcharacteristicsofhierarchicaldigitalinterfacesforequipmentusingthe2048kbit/s-basedplesiochronousorsynchronousdigitalhierarchies".[9]ITU-TRecommendationG.825:"Thecontrolofjitterandwanderwithindigitalnetworkswhicharebasedonthesynchronousdigitalhierarchy(SDH)".[10]ITU-TRecommendationG.823:"Thecontrolofjitterandwanderwithindigitalnetworkswhicharebasedonthe2048kbit/shierarchy".[11]ITU-TRecommendationO.172:"JitterandwandermeasuringequipmentfordigitalsystemswhicharebasedontheSynchronousDigitalHierarchy(SDH)".3Definitionsandabbreviations3.1DefinitionsForthepurposesofthepresentdocument,thetermsanddefinitionsgiveninEN300462-1-1[2]apply.3.2AbbreviationsForthepurposesofthepresentdocument,thefollowingabbreviationsapply:BSBaseStationBSCBaseStationControllerGSMGlobalSystemforMobilecommunicationsITU-TInternationalTelecommunicationsUnion-TelecommunicationsStandardizationSectorMSCMobileSwitchingCentreMTIEMaximumTimeIntervalErrorNENetworkElementPDHPlesiochronousDigitalHierarchyppmpartspermillionPSTNPublicSwitchedTelephoneNetworkSASEStandAloneSynchronizationEquipmentSDHSynchronousDigitalHierarchySSUSynchronizationSupplyUnitSSU-LSSULocalSTM-1optOpticalSTM-1interfaceSTM-1elElectricalSTM-1interfaceSIST EN 300 462-7-1 V1.1.2:2003



ETSIETSIEN300462-7-1V1.1.2(2001-06)7STM-NSynchronousTransportModule-NTDEVTimeDEViationUIUnitIntervalUIppUnitIntervalpeaktopeakAfulllistofabbreviationsusedintimingandsynchronizationislistedinEN300462-1-1[2].4FrequencyaccuracyThelong-termfrequencyaccuracynormallyapplieswhenoperatinginlongtermfreerunningconditions.SincetheSSU-Lisaslaveclock,thenthenormaloperatingmodesareeitherlockedorholdover.Thefrequencyaccuracyspecificationinholdovermodeisspecifiedinclause9.5Pull-inandpull-outrangesTheminimumpull-inrangeshallbe±0,5ppm,whatevertheinternaloscillatorfrequencyoffsetmaybe.Thepull-outrangeisforfurtherstudy.6NoisegenerationThenoisegenerationofanSSU-Lrepresentstheamountofphasenoiseproducedattheoutputwhenthereisanidealinputreferencesignalortheclockisinholdoverstate.Asuitablereference,forpracticaltestingpurposes,impliesaperformancelevelatleast10timesmorestablethantheoutputrequirements.Theabilityoftheclocktolimitthisnoiseisdescribedbyitsfrequencystability.ThemeasuresMTIEandT
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