SIST EN 300 462-7-1 V1.1.2:2003
(Main)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 applications
General Information
- Abstract
Standardize timing characteristics of slave clocks suitable for synchronization supply to equipment in local node applications
- 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
Overview
SIST EN 300 462-7-1 V1.1.2:2003 defines the generic requirements for synchronization networks, specifically focusing on the timing characteristics of slave clocks suitable for synchronization supply to equipment in local node applications. Developed by the Slovenski inštitut za standardizacijo (SIST) and harmonized with European Standard EN 300 462-7-1, the standard is crucial within telecommunications infrastructure to ensure seamless synchronization, network reliability, and consistent service quality in local nodes, such as telephony exchanges or SDH cross-connects.
This document plays a vital role in providing robust synchronization frameworks for Synchronous Digital Hierarchy (SDH) networks, Public Switched Telephone Networks (PSTN), and Public Land Mobile Networks (PLMN), supporting a variety of modern telecommunications services.
Key Topics
- Timing Characteristics: Outlines requirements for Synchronization Supply Units for local node applications (SSU-L), covering operation in locked and holdover modes.
- Noise Performance: Specifies maximum allowable jitter and wander for slave clocks to ensure low phase noise and reliable operation, referencing established metrics like Maximum Time Interval Error (MTIE) and Time Deviation (TDEV).
- Transient Response and Holdover: Details the expectations after reference losses or disturbances, including maximum phase errors, recovery times, and frequency stability during holdover.
- Noise Tolerance: Sets minimum input noise levels slave clocks must tolerate without loss of synchronization, alarms, or unnecessary reference switching.
- Interface Requirements: Addresses synchronization interfaces such as 2048kHz, 2048kbit/s, and various STM-N traffic interfaces, referencing relevant measurement and performance standards.
- Temperature and Environmental Considerations: Ensures compliance under various environmental conditions, with manufacturers specifying the relevant environmental class.
- Applicability and Performance Criteria: Establishes minimum performance requirements for new synchronization networks rather than for already-deployed equipment.
Applications
The standard is critical for:
- Telecommunications Service Providers: Ensuring robust frequency and phase synchronization in local nodes, improving quality of service and network resilience.
- Equipment Manufacturers: Providing design benchmarks for implementing or embedding SSU-L functionality in SDH equipment, telephony exchanges, mobile switching centers, and base station controllers.
- Network Integrators: Guiding the integration and configuration of synchronization technology in complex, multi-vendor environments.
- Operators of GSM Networks: Supporting stringent clock requirements at radio sub-system nodes (e.g., BSC, MSC), which are essential for correct handover and spectrum efficiency.
Related Standards
For comprehensive network synchronization, association with these key standards is recommended:
- EN 300 462-1-1: Definitions and terminology for synchronization networks
- EN 300 462-2-1: Synchronization network architecture
- EN 300 462-3-1: Control of jitter and wander in synchronization networks
- EN 300 462-4-1: Timing characteristics for slave clocks for SDH and PDH equipment
- EN 300 462-5-1: Timing characteristics for slave clocks in SDH equipment
- EN 300 462-6-1: Timing characteristics for primary reference clocks
- ITU-T G.823 & G.825: Control of jitter and wander in digital networks
- ETS 300 166: Physical and electrical characteristics of 2048kbit/s digital interfaces
SIST EN 300 462-7-1 V1.1.2:2003 is a cornerstone standard for ensuring telecom network synchronization quality, enabling interoperability and long-term network evolution for both fixed and mobile communications infrastructure.
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Frequently Asked Questions
SIST EN 300 462-7-1 V1.1.2:2003 is a standard published by the Slovenian Institute for Standardization (SIST). Its full title is "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 applications". This standard covers: Standardize timing characteristics of slave clocks suitable for synchronization supply to equipment in local node applications
Standardize timing characteristics of slave clocks suitable for synchronization supply to equipment in local node applications
SIST EN 300 462-7-1 V1.1.2:2003 is classified under the following ICS (International Classification for Standards) categories: 33.040.20 - Transmission systems. The ICS classification helps identify the subject area and facilitates finding related standards.
SIST EN 300 462-7-1 V1.1.2:2003 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.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
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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