SIST EN 300 462-4-2 V1.1.1:2003

• Abstract:

  Stadardises SDH timing distribution architectures, synchronisation network level jitter and wander requirements, slave clock timing specifications and primary reference clock specifications.

• Status: Published
• Publication Date: 30-Nov-2003
• ICS: 33.040.20 - Transmission systems
• Technical Committee: SS EIT - Technical Board for the electrotechnical, information technology and telecommunications fields
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 01-Dec-2003
• Due Date: 01-Dec-2003
• Completion Date: 01-Dec-2003
• Ref Project: ETSI EN 300 462-4-2 V1.1.1 (1999-12) - Transmission and Multiplexing (TM); Generic requirements for synchronization networks; Part 4-2: Timing characteristics of slave clocks suitable for synchronization supply to Synchronous Digital Hierarchy (SDH) and Plesiochronous Digital Hierarchy (PDH) equipment; Implementation Conformance Statement (ICS) proforma specification

SIST EN 300 462-4-2 V1.1.1:2003 is a SIST standard identical to ETSI EN 300 462-4-2 V1.1.1. It is an Implementation Conformance Statement (ICS) proforma for synchronization network equipment, covering slave clocks and Synchronization Supply Units (SSU) that provide timing to Synchronous Digital Hierarchy (SDH) and Plesiochronous Digital Hierarchy (PDH) equipment. Suppliers use it to declare implemented capabilities, and test laboratories use it to decide which conformance checks apply.

What does SIST EN 300 462-4-2 V1.1.1:2003 specify?

SIST EN 300 462-4-2 V1.1.1:2003 specifies the ICS proforma for the synchronization network generic requirements defined in EN 300 462-4-1, using the conformance-testing guidance of ISO/IEC 9646-7 and ETS 300 406. In practice, it gives a standard questionnaire for recording what an implementation supports, rather than restating the full timing specification itself.

The document is organized into four clauses and two normative annexes:

• Clause 1 - Scope
• Clause 2 - References
• Clause 3 - Definitions, symbols and abbreviations
• Clause 4 - Conformance to this ICS proforma specification
• Annex A - ICS proforma guidance
• Annex B - ICS proforma for EN 300 462-4-1

Annex	What it covers
Annex A	Guidance for completing the ICS proforma, including status codes, support entries and completion rules
Annex B	The actual SSU ICS questionnaire for EN 300 462-4-1, including interface, jitter, wander, transfer and holdover items

What are the key requirements of SIST EN 300 462-4-2 V1.1.1:2003?

SIST EN 300 462-4-2 V1.1.1:2003 requires a completed ICS to match the proforma in Annex A and to keep the same numbering, naming and order of items. That matters because a laboratory or buyer can only compare answers reliably when every supplier uses the same structure.

• Clause 4 says an ICS claiming conformance must be technically equivalent to Annex A and completed according to A.1. In practice, the form cannot be rewritten in a different structure.
• Annex A defines the table conventions: item, item description, status, reference, support, values allowed and values supported. This tells the supplier exactly how to answer each capability question.
• Annex A also defines the status codes m, o, n/a, x, o.i and c. These codes show whether a capability is mandatory, optional, excluded or conditional.
• Annex B.1 asks for implementation identification, including date, IUT, SUT and supplier details. This ties the answers to a specific product and configuration.
• Annex B.3 requires a global Yes/No statement on whether all mandatory capabilities are implemented. A No answer means the declared implementation is non-conforming.
• Annex B.4.1 and B.4.1.1 require the SSU to declare supported input and output synchronization interfaces, with 2048 kHz, 2048 kbit/s and STM-N as the listed types. For a purchaser, this shows what timing interfaces the equipment can actually use.
• Annex B.4.2, B.4.3, B.4.4 and B.4.5 cover pull-in, jitter tolerance, wander tolerance, locked-mode noise, transfer characteristic, transient response and holdover. In practice, these items show whether the SSU can keep timing stable under disturbed inputs, switching events and internal failures.

What terms does SIST EN 300 462-4-2 V1.1.1:2003 define?

• Implementation Conformance Statement (ICS) - a statement from the supplier of an implementation or system showing which capabilities have been implemented for a given specification.
• ICS proforma - a questionnaire document that becomes an ICS when it is completed for an implementation or system.
• Implementation Under Test (IUT) - the implementation being assessed, identified in Annex B as an SSU.
• System Under Test (SUT) - the larger system that contains the IUT when the SSU is a function within another piece of equipment.
• Synchronization Supply Unit (SSU) - the SSU is the synchronization function covered by the Annex B proforma, including input, output, jitter, wander and holdover behavior.
• Stand-Alone Synchronization Equipment (SASE) - an SSU implemented as a separate piece of equipment rather than as a function inside another system.
• Maximum Time Interval Error (MTIE) - a timing-error measure used in the SSU wander and output-noise items.
• Time DEViation (TDEV) - a timing stability measure used for SSU output wander under constant temperature conditions.

Who uses SIST EN 300 462-4-2 V1.1.1:2003?

SIST EN 300 462-4-2 V1.1.1:2003 is used by SSU suppliers, conformance test laboratories, telecom equipment manufacturers and buyers responsible for SDH and PDH synchronization equipment. It helps them document interface support, timing behavior and holdover capability in a standard form.

It is especially relevant where a synchronization function is built into a larger system, such as a telephony exchange or SDH cross-connect. In those cases, the proforma captures both the SSU itself and the host system that contains it.

Which standards are used with SIST EN 300 462-4-2 V1.1.1:2003?

Reference	What it contributes
EN 300 462-4-1	The timing characteristics of slave clocks that the Annex B questionnaire refers to
EN 300 462-3-1	The performance limits used for jitter and wander accommodation
EN 300 462-1-1	Definitions and abbreviations for synchronization networks
EN 300 462-2-1	Synchronization network architecture
EN 300 462-5-1	Timing characteristics of slave clocks for operation in SDH equipment
EN 300 462-6-1	Timing characteristics of primary reference clocks
ETS 300 406	Standardization methodology for testing and profile conformance
ISO/IEC 9646-1	General concepts for conformance testing methodology
ISO/IEC 9646-7	Rules for Implementation Conformance Statements
ITU-T Recommendation O.172	Instrumentation for measuring jitter and wander in SDH-based digital systems

What does the SIST EN 300 462-4-2 V1.1.1:2003 document contain?

SIST EN 300 462-4-2 V1.1.1:2003 contains guidance text, a completion method and a structured SSU questionnaire. Annex A explains how to fill in the tables, how to use conditional items and how to record support and comments.

Annex B contains the practical conformance checklist: identification fields, a global conformance statement, interface descriptions, input tolerance items, jitter and wander tolerance items, locked-mode output noise items, transfer characteristics, and transient response and holdover items. The tables are meant for design review, supplier declarations and conformance testing, not for reproducing the full timing specification itself.

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Transmission and Multiplexing (TM); Generic requirements for synchronization networks; Part 4-2: Timing characteristics of slave clocks suitable for synchronization supply to Synchronous Digital Hierarchy (SDH) and Plesiochronous Digital Hierarchy (PDH) equipment; Implementation Conformance Statement (ICS) proforma specification33.040.20Prenosni sistemTransmission systemsICS:Ta slovenski standard je istoveten z:EN 300 462-4-2 Version 1.1.1SIST EN 300 462-4-2 V1.1.1:2003en01-december-2003SIST EN 300 462-4-2 V1.1.1:2003SLOVENSKI
STANDARD
ETSIEN300462-4-2V1.1.1(1999-12)EuropeanStandard(Telecommunicationsseries)TransmissionandMultiplexing(TM);Genericrequirementsforsynchronizationnetworks;Part4-2:TimingcharacterizticsofslaveclockssuitableforsynchronizationsupplytoSynchronousDigitalHierarchy(SDH)andPlesiochronousDigitalHierarchy(PDH)equipment;ImplementationConformanceStatement(ICS)proformaspecificationSIST EN 300 462-4-2 V1.1.1:2003

ETSIETSIEN300462-4-2V1.1.1(1999-12)2ReferenceDEN/TM-01057-4-2KeywordsICS,synchronization,transmission,SDH,PDH,testingETSIPostaladdressF-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,thereferenceshallbetheprintingonETSIprintersofthePDFversionkeptonaspecificnetworkdrivewithinETSISecretariat.CopyrightNotificationNopartmaybereproducedexceptasauthorizedbywrittenpermission.Thecopyrightandtheforegoingrestrictionextendtoreproductioninallmedia.©EuropeanTelecommunicationsStandardsInstitute1999.Allrightsreserved.SIST EN 300 462-4-2 V1.1.1:2003

ETSIETSIEN300462-4-2V1.1.1(1999-12)3ContentsIntellectualPropertyRights.4Foreword.4Introduction.51Scope.62References.63Definitions,symbolsandabbreviations.73.1Definitions.73.2Symbols.73.3Abbreviations.74ConformancetothisICSproformaspecification.8AnnexA(normative):ICSproformaguidance.9A.1GuidanceforcompletingtheICSproforma.9A.1.1Purposesandstructure.9A.1.2Abbreviationsandconventions.9A.1.3InstructionsforcompletingtheICSproforma.11AnnexB(normative):ICSproformaforEN300462-4-1,TimingcharacteristicsofslaveclocksforsynchronizationsupplytoSDHandPDHequipment.12B.1Identificationoftheimplementation.12B.1.1Dateofthestatement.12B.1.2ImplementationUnderTest(IUT)identification.12B.1.3SystemUnderTest(SUT)identification(ifappropriate).12B.1.4Productsupplier.13B.2IdentificationoftheEN.13B.3Globalstatementofconformance.13B.4SSUICSproforma.14B.4.1SSUdescription.14B.4.1.1SSUinterfacedescription.14B.4.2SSUinputtolerance.14B.4.3SSUoutputnoisegenerationinlockedmode.16B.4.4SSUtransfercharacteristic.16B.4.5SSUtransientresponseandholdoverperformance.17History.18SIST EN 300 462-4-2 V1.1.1:2003

ETSIETSIEN300462-4-2V1.1.1(1999-12)4IntellectualPropertyRightsIPRsessentialorpotentiallyessentialtothepresentdocumentmayhavebeendeclaredtoETSI.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)hasbeenproducedbyETSITechnicalCommitteeTransmissionandMultiplexing(TM).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".Parts1-1,2-1,3-1,4-1,5-1and6-1havebeenpublishedasEN300462Parts1-1,2-1,3-1,4-1,5-1and6-1,respectively.AllpreviousETSshavebeenwithdrawn.NationaltranspositiondatesDateofadoptionofthisEN:10December1999DateoflatestannouncementofthisEN(doa):31March2000DateoflatestpublicationofnewNationalStandardorendorsementofthisEN(dop/e):30September2000DateofwithdrawalofanyconflictingNationalStandard(dow):30September2000SIST EN 300 462-4-2 V1.1.1:2003

ETSIETSIEN300462-4-2V1.1.1(1999-12)5IntroductionToevaluateconformanceofaparticularimplementation,itisnecessarytohaveastatementofwhichcapabilitiesandoptionshavebeenimplementedforatelecommunicationspecification.SuchastatementiscalledanImplementationConformanceStatement(ICS).TheICSproformaisnotanothercompletedescriptionoftherelatedspecification,butratheracompactformofitsstaticconformancerequirements,tobeusedbythetestlaboratorytoidentifywhichtestshallbeperformedonagivenimplementation.NoteveryfeatureofaprofilespecificationiscontainedintherelatedICSproforma.ForparticularcasesrequiringspecificinformationtheICScanrefertotheappropriateclauseoftherelatedspecificationbymeansofreferences,notesandorcomments.SIST EN 300 462-4-2 V1.1.1:2003

ETSIETSIEN300462-4-2V1.1.1(1999-12)61ScopeThepresentdocumentprovidestheImplementationConformanceStatement(ICS)proformaspecificationforthesynchronizationnetworkgenericrequirementsdefinedinEN300462-4-1[4]incompliancewiththerelevantrequirements,andinaccordancewiththerelevantguidancegiveninISO/IEC9646-7[9]andETS300406[7].2ReferencesThefollowingdocumentscontainprovisions,whichthroughreferenceinthistext,constituteprovisionsofthepresentdocument.•Referencesareeitherspecific(identifiedbydateofpublication,editionnumber,versionnumber,etc.)ornon-specific.•Foraspecificreference,subsequentrevisionsdonotapply.•Foranon-specificreference,thelatestversionapplies.•Anon-specificreferencetoanETSshallalsobetakentorefertolaterversionspublishedasanENwiththesamenumber.[1]EN300462-1-1:"TransmissionandMultiplexing(TM);Genericrequirementsforsynchronisationnetworks;Part1:Definitionsandterminologyforsynchronisationnetworks".[2]EN300462-2-1:"TransmissionandMultiplexing(TM);Genericrequirementsforsynchronizationnetworks;Part2-1:Synchronizationnetworkarchitecture".[3]EN300462-3-1:"TransmissionandMultiplexing(TM);Genericrequirementsforsynchronizationnetworks;Part3-1:Thecontrolofjitterandwanderwithinsynchronizationnetworks".[4]EN300462-4-1:"TransmissionandMultiplexing(TM);Genericrequirementsforsynchronizationnetworks;Part4-1:TimingcharacteristicsofslaveclockssuitableforsynchronizationsupplytoSynchronousDigitalHierarchy(SDH)andPlesiochronousDigitalHierarchy(PDH)equipment".[5]EN300462-5-1:"TransmissionandMultiplexing(TM);Genericrequirementsforsynchronizationnetworks;Part5-1:TimingcharacteristicsofslaveclockssuitableforoperationinSynchronousDigitalHierarchy(SDH)equipment".[6]EN300462-6-1:"TransmissionandMultiplexing(TM);Genericrequirementsforsynchronizationnetworks;Part6-1:Timingcharacteristicsofprimaryreferenceclocks".[7]ETS300406(1995):"MethodsfortestingandSpecification(MTS);Protocolandprofileconformancetestingspecifications;Standardizationmethodology".[8]ISO/IEC9646-1(1994):"Informationtechnology-OpenSystemsInterconnection-Conformancetestingmethodologyandframework-Part1:Generalconcepts".[9]ISO/IEC9646-7(1995):"Informationtechnology-OpenSystemsInterconnection-Conformancetestingmethodologyandframework-Part7:ImplementationConformanceStatements".[10]ITU-TRecommendationO.172:"Jitterandwandermeasuringequipmentfordigitalsystemswhicharebasedonthesynchronousdigitalhierarchy(SDH)".SIST EN 300 462-4-2 V1.1.1:2003

ETSIETSIEN300462-4-2V1.1.1(1999-12)73Definitions,symbolsandabbreviations3.1DefinitionsForthepurposesofthepresentdocument,thefollowingtermsanddefinitionsapply:-termsdefinedinEN300462[1]to[6];-termsdefinedinISO/IEC9646-1[8]andinISO/IEC9646-7[9].Inparticular,thefollowingtermsdefinedinISO/IEC9646-1[8]apply:ImplementationConformanceStatement(ICS):statementmadebythesupplierofanimplementationorsystemclaimedtoconformtoagivenspecification,statingwhichcapabilitieshavebeenimplemented.TheICScantakeseveralforms:protocolICS,profileICS,profilespecificICS,informationobjectICS,etcICSproforma:document,intheformofaquestionnaire,whichwhencompletedforanimplementationorsystembecomesanICS3.2SymbolsForthepurposesofthepresentdocument,thefollowingsymbolsapply:KKelvinτTau3.3AbbreviationsForthepurposesofthepresentdocument,thefollowingabbreviationsapply:ICSImplementationConformanceStatementIUTImplementationUnderTestMTIEMaximumTimeIntervalErrorPDHPlesiochronousDigitalHierarchyppmpartspermillionSASEStandAloneSynchronizationEquipmentSCSSystemConformanceStatementSDHSynchronousDigitalHierarchySSUSynchronizationSupplyUnitSTM-NSynchronousTransportModule-NSUTSystemUnderTestTDEVTimeDEViationUIUnitIntervalUIppUnitIntervalpeaktopeakAfulllistofabbreviationsusedintimingandsynchronizationislistedinEN300462-1-1[1].SIST EN 300 462-4-2 V1.1.1:2003

ETSIETSIEN300462-4-2V1.1.1(1999-12)84ConformancetothisICSproformaspecificationIfitclaimstoconformtothepresentdocument,theactualICSproformatobefilledinbyasuppliershallbetechnicallyequivalenttothetextoftheICSproformagiveninannexA,andshallpreservethenumbering/namingandorderingoftheproformaitems.AnICS,whichconformstothepresentdocumentshallbeaconformingICSproformacompletedinaccordancewiththeguidanceforcompletiongiveninclauseA.1.InstrumentationinaccordancewithITU-TRecommendationO.172[10]isappropriateforverifyingconformancetothesespecifications.SIST EN 300 462-4-2 V1.1.1:2003

ETSIETSIEN300462-4-2V1.1.1(1999-12)9AnnexA(normative):ICSproformaguidanceNotwithstandingtheprovisionsofthecopyrightclauserelatedtothetextofthepresentdocument,ETSIgrantsthatusersofthepresentdocumentmayfreelyreproducetheICSproformainthisannexsothatitcanbeusedforitsintendedpurposesandmayfurtherpublishthecompletedICS.A.1GuidanceforcompletingtheICSproformaA.1.1PurposesandstructureThepurposeofthisICSproformaistoprovideamechanismwherebyasupplierofanimplementationoftherequirementsdefinedinEN300462-4-1mayprovideinformationabouttheimplementationinastandardizedmanner.TheICSproformaissubdividedintosubclausesforthefollowingcategoriesofinformation:-guidanceforcompletingtheICSproforma;-identificationoftheimplementation;-identificationoftheEN;-globalstatementofconformance.A.1.2AbbreviationsandconventionsTheICSproformacontainedinannexesofthepresentdocumentiscomprisedofinformationintabularforminaccordancewiththeguidelinespresentedinISO/IEC9646-7.ItemcolumnTheitemcolumncontainsanumberwhichidentifiestheiteminthetable.ItemdescriptioncolumnTheitemdescriptioncolumndescribesinfreetexteachrespectiveitem(e.g.parameters,timers,etc.).Itimplicitlymeans"issupportedbytheimplementation?".StatuscolumnThefollowingnotations,definedinISO/IEC9646-7,areusedforthestatuscolumn:mmandatory-thecapabilityisrequiredtobesupported.ooptional-thecapabilitymaybesupportedornot.n/anotapplicable-inthegivencontext,itisimpossibletousethecapability.xprohibited(excluded)-thereisarequirementnottousethiscapabilityinthegivencontext.o.iqualifiedoptional-formutuallyexclusiveorselectableoptionsfromaset."i"isanintegerwhichidentifiesanuniquegroupofrelatedoptionalitemsandthelogicoftheirselectionwhichisdefinedimmediatelyfollowingthetable.ciconditional-therequirementonthecapability("m","o","x"or"n/a")dependsonthesupportofother
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