SIST EN 300 689 V1.2.1:2004
(Main)Access and Terminals (AT); 34 Mbit/s digital leased lines (D34U and D34S); Terminal equipment interface
General Information
- Abstract
Revision to improve the safety related text following a liaison from TC Safety. Specification of the performance requirements for the connection through the public network and test methods for compliance.
- Status
- Published
- Publication Date
- 30-Sep-2004
- Technical Committee
- SPN - Services and Protocols for Networks
- Current Stage
- 6060 - National Implementation/Publication (Adopted Project)
- Start Date
- 01-Oct-2004
- Due Date
- 01-Oct-2004
- Completion Date
- 01-Oct-2004
- Mandate
- T-297
Overview
SIST EN 300 689 V1.2.1:2004 is a Slovenian national standard developed in alignment with European Standard EN 300 689 (ETSI). It covers the performance requirements and conformity testing for terminal equipment interfaces used with 34 Mbit/s digital leased lines, focusing on both unstructured (D34U) and structured (D34S) lines. This standard is crucial for ensuring interoperability and reliable operation of telecom equipment connecting to public digital networks, with specific enhancements to safety-related text as recommended by related technical committees.
Key Topics
- Terminal Equipment Interface Specifications: Sets out the necessary mechanical and electrical interface characteristics for equipment connecting through 34 Mbit/s digital leased lines.
- Mechanical Requirements: Defines accepted connector types, such as 75Ω coaxial sockets and plugs (including BNC), to ensure robust physical connections between terminals and network interfaces.
- Electrical Performance: Details required signal coding (HDB3), waveform shapes, timing, return loss, jitter, and frame structure specifics for both D34U and D34S lines, referencing established international guidelines (e.g., ITU-T G.703).
- Functional Conformance Tests: Specifies test methods to verify compliance with output and input requirements, including signal integrity, jitter tolerance, and frame alignment procedures.
- Safety and EMC: While this standard references safety and electromagnetic compatibility (EMC) considerations, it defers detailed requirements to other published standards (such as CENELEC EN 60950).
- Alignment with EU Directives: Supports harmonized access and open network provision (ONP) as per EU regulatory directives by detailing minimum technical interface requirements.
- Revised Safety Text: Incorporates improvements to safety-related content based on liaison with specialized safety technical committees.
Applications
SIST EN 300 689 V1.2.1:2004 applies to:
- Telecommunications Networks: Ensuring that terminal equipment (such as multiplexers, routers, and transmission units) can connect seamlessly to public network termination points using 34 Mbit/s leased lines.
- Service Providers: Enabling operators to deploy compliant customer premises equipment (CPE) that meets European interoperability and safety standards.
- Equipment Manufacturers: Providing guidance for designing products intended for use on 34 Mbit/s digital leased lines, supporting both unstructured and structured data rates, to guarantee electrical compatibility and performance.
- Installers and Engineering Teams: Assisting technical personnel in specifying suitable interfaces and verifying conformance, thus reducing installation and operational risks.
- Regulatory Compliance: Supporting alignment with European directives on leased lines and open network provisions, helping businesses meet market entry requirements across the EU.
Related Standards
To ensure comprehensive compliance and interoperability, SIST EN 300 689 V1.2.1:2004 references several key standards:
- EN 300 686: Concerns network interface presentations for 34 and 140 Mbit/s digital leased lines.
- EN 300 687: Specifies connection characteristics for 34 Mbit/s digital leased lines.
- ITU-T G.703: Defines physical and electrical characteristics for hierarchical digital interfaces.
- IEC 60169-8 & IEC 60169-13: Relate to specific connector types for RF coaxial cables.
- ISO/IEC 10173: Focuses on ISDN primary rate access connectors.
- Relevant CENELEC Safety Standards (e.g., EN 60950): For electrical safety requirements.
- ONP and EU Directives (e.g., 92/44/EEC): For open and harmonized network provisions.
Practical Value
By adhering to the requirements of SIST EN 300 689 V1.2.1:2004, organizations can:
- Ensure equipment compatibility and interoperability within European telecom infrastructure.
- Support high-speed data transmission with minimized errors and interference.
- Achieve regulatory compliance more easily, facilitating market entry and reducing product development risks.
- Promote network reliability and safety, benefiting both operators and end users.
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Frequently Asked Questions
SIST EN 300 689 V1.2.1:2004 is a standard published by the Slovenian Institute for Standardization (SIST). Its full title is "Access and Terminals (AT); 34 Mbit/s digital leased lines (D34U and D34S); Terminal equipment interface". This standard covers: Revision to improve the safety related text following a liaison from TC Safety. Specification of the performance requirements for the connection through the public network and test methods for compliance.
Revision to improve the safety related text following a liaison from TC Safety. Specification of the performance requirements for the connection through the public network and test methods for compliance.
SIST EN 300 689 V1.2.1:2004 is classified under the following ICS (International Classification for Standards) categories: 33.040.50 - Lines, connections and circuits. The ICS classification helps identify the subject area and facilitates finding related standards.
SIST EN 300 689 V1.2.1:2004 is associated with the following European legislation: Standardization Mandates: T-297. 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 300 689 V1.2.1:2004 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.Dostop in terminali (AT) - Digitalni zakupljeni vodi za prenosno hitrost 34 Mbit/s (D34U, D34S) - Vmesnik terminalske opremeAccess and Terminals (AT); 34 Mbit/s digital leased lines (D34U and D34S); Terminal equipment interface33.040.50Vodi, zveze in tokokrogiLines, connections and circuitsICS:Ta slovenski standard je istoveten z:EN 300 689 Version 1.2.1SIST EN 300 689 V1.2.1:2004en01-oktober-2004SIST EN 300 689 V1.2.1:2004SLOVENSKI
STANDARD
ETSIEN300689V1.2.1(2001-07)EuropeanStandard(Telecommunicationsseries)AccessandTerminals(AT);34Mbit/sdigitalleasedlines(D34UandD34S);TerminalequipmentinterfaceSIST EN 300 689 V1.2.1:2004
ETSIETSIEN300689V1.2.1(2001-07)2ReferenceREN/AT-020009Keywordsaccess,digital,interface,leasedline,ONP,terminalETSI650RoutedesLuciolesF-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 300 689 V1.2.1:2004
ETSIETSIEN300689V1.2.1(2001-07)3ContentsIntellectualPropertyRights.5Foreword.5Introduction.61Scope.72References.73Definitionsandabbreviations.83.1Definitions.83.2Abbreviations.84Requirements.94.1Mechanicalcharacteristics.94.1.1Sockets.104.1.2Plugs.104.2Electricalcharacteristics.104.2.1Outputport.104.2.1.1Signalcoding.104.2.1.2Waveformshape.104.2.1.3Outputtiming.114.2.1.4Outputreturnloss.124.2.1.5Outputjitter.124.2.1.6Outputframestructure.124.2.2Inputport.134.2.2.1Signalcoding.134.2.2.2Inputreturnloss.134.2.2.3Inputlosstolerance.134.2.2.4Immunityagainstreflections.134.2.2.5Inputjittertolerance.134.2.2.6Inputclocktolerance.144.2.2.7Inputframestructure.144.2.2.8Framealignmentprocedure.144.3Safety.154.4Overvoltage.154.5ElectroMagneticCompatibility(EMC).15AnnexA(normative):Testmethods.16A.1General.16A.1.1Additionalinformationtosupportthetest.16A.1.2Equipmentconnection.16A.2Testmethods.17A.2.1Signalcodingattheoutputport.17A.2.2Waveformshapeattheoutputport.17A.2.3Outputtiming.18A.2.4Inputsignalcoding,losstoleranceandimmunityagainstreflections.19A.2.5Inputreturnloss.20A.2.6Outputreturnloss.21A.2.7Inputandoutputjitter.22A.2.8Framestructure.23A.2.9Framealignmentprocedure.24AnnexB(normative):DefinitionofHDB3code.26B.1General.26B.2Definition.26SIST EN 300 689 V1.2.1:2004
ETSIETSIEN300689V1.2.1(2001-07)4AnnexC(normative):Definitionofframestructure.27C.1Framestructureat34368kbit/s.27C.1.1Trailaccesspointidentifierformat.28C.1.1.1CRC-7calculation-multiplicationanddivisionprocess.29C.1.1.2CRC-7calculation-encodingprocedure.29C.1.1.3CRC-7calculation-decodingprocedure.29AnnexD(normative):RequirementsTable(RT).30AnnexE(informative):Bibliography.31History.32SIST EN 300 689 V1.2.1:2004
ETSIETSIEN300689V1.2.1(2001-07)5IntellectualPropertyRightsIPRsessentialorpotentiallyessentialtothepresentdocumentmayhavebeendeclaredtoETSI.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)hasbeenproducedbyETSITechnicalCommitteeAccessandTerminals(AT).ThepresentdocumentresultedfromamandatefromtheCommissionoftheEuropeanCommunity(CEC)toprovidestandardsforthesupportoftheDirectiveonOpenNetworkProvision(ONP)ofleasedlines(92/44/EEC).Therearetwootherstandardsdirectlyrelatedtothepresentdocument:-EN300686:"AccessandTerminals(AT);34Mbit/sand140Mbit/sdigitalleasedlines(D34U,D34S,D140U,D140S);Networkinterfacepresentation";-EN300687:"AccessandTerminals(AT);34Mbit/sdigitalleasedlines(D34UandD34S);Connectioncharacteristics".ThepresentdocumentisbasedoninformationfromITU-TRecommendationsandETSIpublicationsandtherelevantdocumentsarequotedwhereappropriate.NationaltranspositiondatesDateofadoptionofthisEN:29June2001DateoflatestannouncementofthisEN(doa):30September2001DateoflatestpublicationofnewNationalStandardorendorsementofthisEN(dop/e):31March2002DateofwithdrawalofanyconflictingNationalStandard(dow):31March2002SIST EN 300 689 V1.2.1:2004
ETSIETSIEN300689V1.2.1(2001-07)6IntroductionTheCouncilDirectiveontheapplicationofONPtoleasedlines(92/44/EEC)concernstheharmonizationofconditionsforopenandefficientaccessto,anduseof,theleasedlinesprovidedoverpublictelecommunicationsnetworks,andtheavailabilitythroughouttheEuropeanUnionofaminimumsetofleasedlineswithharmonizedtechnicalcharacteristics.The34Mbit/sunstructuredandstructuredleasedlinesarenotpartoftheminimumsetofleasedlinesundertheleasedlineDirective,howeverthesestandardsarebeingwrittenwiththeintentionthatwhere34Mbit/sleasedlinesareoffered,theywillbeinaccordancewiththeseharmonizedstandards.Twocategories(voluntaryandregulatory)ofstandardwereusedfortheinterfacesofterminalequipmentdesignedforconnectiontotheONPleasedlines.TechnicalBasisforRegulations(TBRs)gavetheearlieressentialrequirementsundertheDirective91/263/EEC(seeannexE),laterreplacedby98/13/EC(seeannexE),forattachmenttotheleasedlines,whereasothervoluntarystandards(ETSsorENs)gavethefulltechnicalspecificationsfortheseinterfaces.Thepresentdocument,whichisbasedonanearlierETS,belongstothesecondcategory.TherequirementsofTBR24(seeannexE)areasubsetofthepresentdocument.Thepresentversionofthepresentdocumenthasbeenproducedtointroducesomenecessarychanges.ETS300166(seeannexE)andITU-TRecommendationG.703[4]wereusedasthebasisfortheterminalequipmentinterfaceaspectsofthepresentdocument.SIST EN 300 689 V1.2.1:2004
ETSIETSIEN300689V1.2.1(2001-07)71ScopeThepresentdocumentspecifiesthemechanicalandelectricalcharacteristics(exceptsafety,overvoltageandEMCaspects),thenecessaryfunctionalcharacteristicsandthecorrespondingconformancetestsforaterminalequipmentinterfacefor:-connectiontothenetworkterminationpointsof34368kbit/sdigitalunstructuredleasedlines(D34U);and-connectiontothenetworkterminationpointsof34368kbit/sdigitalstructuredleasedlines(D34S)whichsupportanunstructured33920kbit/sinformationtransferrate.TheseleasedlinesaredefinedinEN300686[7]andEN300687[8].Thepresentdocumentiswrittenonlytoensurethattheinterfaceoftheterminalequipmentiscompatiblewiththe34Mbit/sdigitalunstructuredorstructuredleasedline.Thepresentdocumentisapplicabletoallinterfacesdesignedforconnectiontotheleasedline,howeverinthecasesofapparatusthatcarriesaparticularservice,ofcomplexapparatusandofapparatusinprivatenetworks,otherrequirementsmayapplyinadditiontothepresentdocument.CustomerpremiseswiringandinstallationbetweentheterminalequipmentandtheNetworkTerminationPoint(NTP)areoutsidethescopeofthepresentdocument.2ReferencesThefollowingdocumentscontainprovisionswhich,throughreferenceinthistext,constituteprovisionsofthepresentdocument.• Referencesareeitherspecific(identifiedbydateofpublication,editionnumber,versionnumber,etc.)ornon-specific.• Foraspecificreference,subsequentrevisionsdonotapply.• Foranon-specificreference,thelatestversionapplies.[1]IEC60169-8(1978):"Radiofrequencyconnectors;Part8:R.Fcoaxialconnectorswithinnerdiametersofouterconductor6,5mm(0,256in)withbayonetlock-Characteristicimpedance50ohms(TypeBNC)".[2]IEC60169-13(1976):"Radiofrequencyconnectors;Part13:R.F.coaxialconnectorswithinnerdiameterofouterconductor5,6mm(0,22in)-Characteristicimpedance75ohms(Type1,6/5,6)-Characteristicimpedance50ohms(Type1,8/5,6)withsimilarmatingdimensions".[3]ISO/IEC10173(1998):"Informationtechnology-Telecommunicationsandinformationexchangebetweensystems-InterfaceconnectorandcontactassignmentsforISDNprimaryrateaccessconnectorlocatedatreferencepointsSandT".[4]ITU-TRecommendationG.703(1998):"Physical/electricalcharacteristicsofhierarchicaldigitalinterfaces".[5]ITU-TRecommendationO.151(1992):"Errorperformancemeasuringequipmentoperatingattheprimaryrateandabove".[6]ITU-TRecommendationO.171(1997):"Timingjitterandwandermeasuringequipmentfordigitalsystemswhicharebasedontheplesiochronousdigitalhierarchy(PDH)".[7]ETSIEN300686:"AccessandTerminals(AT);34Mbit/sand140Mbit/sdigitalleasedlines(D34U,D34S,D140U,D140S);Networkinterfacepresentation".[8]ETSIEN300687:"AccessandTerminals(AT);34Mbit/sdigitalleasedlines(D34UandD34S);Connectioncharacteristics".SIST EN 300 689 V1.2.1:2004
ETSIETSIEN300689V1.2.1(2001-07)83Definitionsandabbreviations3.1DefinitionsForthepurposesofthepresentdocument,thefollowingtermsanddefinitionsapply:frame:repetitivesetofconsecutivebitsinwhichthepositionofeachbitcanbeidentifiedbyreferencetoaframealignmentsignalframealignmentsignal:distinctivesignalinsertedineveryframealwaysoccupyingthesamerelativepositionwithintheframeandusedtoestablishandmaintainframealignmentleasedlines:telecommunicationsfacilitiesprovidedbyapublictelecommunicationsnetworkthatprovidedefinedtransmissioncharacteristicsbetweennetworkterminationpointsandthatdonotincludeswitchingfunctionsthattheusercancontrol,(e.g.on-demandswitching)NetworkTerminationPoint(NTP):allphysicalconnectionsandtheirtechnicalaccessspecificationswhichformpartofthepublictelecommunicationsnetworkandarenecessaryforaccesstoandefficientcommunicationthroughthatpublicnetworkPRBS(223-1):PseudoRandomBitSequence(PRBS)(asdefinedinclause2.2ofITU-TRecommendationO.151)terminalequipment:equipmentintendedtobeconnectedtothepublictelecommunicationsnetwork,i.e.:-tobeconnecteddirectlytotheterminationofapublictelecommunicationnetwork;or-tointerworkwithapublictelecommunicationsnetworkbeingconnecteddirectlyorindirectlytotheterminationofapublictelecommunicationsnetwork;inordertosend,process,orreceiveinformation3.2AbbreviationsForthepurposesofthepresentdocument,thefollowingabbreviationsapply:AISAlarmindicationSignalAMIAlternateMarkInversionASCIIAmericanStandardCodeforInformationInterchangeATMAsynchronousTransferModeBIP-8BitInterleavedParity(8bit)BNCBayonetNutConnectorCRC-7CyclicRedundancyCheck(7bit)dcdirectcurrentD34S34Mbit/sdigitalstructuredleasedlineD34U34Mbit/sdigitalunstructuredleasedlineEMErrorMonitoringEMCElectroMagneticCompatibilityFA1FrameAlignmentbyte1FA2FrameAlignmentbyte2FASFrameAlignmentSignalGCGeneralpurposeCommunicationschannelHDB3HighDensityBipolarcode3LOFLossOfFrameLOSLossOfSignalLSBLeastSignificantBitMAMaintenanceandAdaptationMSBMostSignificantBitNRNetworkoperatorbyteNTPNetworkTerminationPointONPOpenNetworkProvisionppmpartspermillionSIST EN 300 689 V1.2.1:2004
ETSIETSIEN300689V1.2.1(2001-07)9PRBSPseudoRandomBitSequenceRDIRemoteDefectIndicationREIRemoteErrorIndicationRTRequirementsTableRXRXisasignalinput(ateithertheterminalequipmentorthetestequipment,seefigure1)SDHSynchronousDigitalHierarchyTMTimingMarkerTUTributaryUnitTRTRailtraceTTITrailTraceIdentifierTXTXisasignaloutput(ateithertheterminalequipmentorthetestequipment,seefigure1)UIUnitInterval4RequirementsTheD34U34368kbit/sunstructuredleasedlineprovidesabi-directionalpoint-to-pointdigitalleasedlineforthesupportofanunstructured34368kbit/sinformationtransferrate.Anystructuringofthedataistheresponsibilityoftheuser.TheD34S34368kbit/sstructuredleasedlineprovidesabi-directionalpoint-to-pointdigitalleasedlineforthesupportofanunstructured33920kbit/sinformationtransferrate.Anystructuringofthedatawithinthetransparent33920kbit/spartoftheframeistheresponsibilityoftheuser.ForbothD34UandD34Stheprovisionoftimingistheresponsibilityoftheuser;however,incertaininstallationstheleasedlineprovidermaybeabletoofferaleasedlinethatissynchronizedtothenetwork.4.1MechanicalcharacteristicsTheterminalequipmentshallprovideatleastoneofthemethodsofconnectiongiveninclauses4.1.1and4.1.2.NOTE1:WhenconnectingtheterminalequipmenttotheNTP,anydifferenceingroundpotentialbetweenthetwoequipmentsmayproduceavoltageacrossthesignalgroundconnectionandmaycausedamage.SeeEN50310(seeannexE)fordetailsofearthingrequirementswithinthecustomer'spremises.NOTE2:Thetransmitpairistheoutputfromtheterminalequipmentinterface.Thereceivepairistheinputtotheterminalequipmentinterface,asshowninfigure1.Wheretheterms"output"and"input"areusedwithoutqualificationinthepresentdocument,theyrefertotheterminalequipmentinterface.NOTE3:Normalpracticeisfortheouterconductorsoftheinputandoutputconnectorstobeconnectedviaadcpathtothesignalgroundandthencetoground.ThisconnectionistoreduceEMCemissions.IfthereisadifferenceingroundpotentialbetweentheterminalequipmentandtheNTP,thisarrangementmayresultinhighcurrentsintheouterconductorsandcausedamage.Topreventthisproblem,dcisolationmaybeintroducedbetweentheterminalequipmentandtheNTP,forexamplebyintroducingdcisolationbetweentheouterconductorandthesignalgroundintheterminalequipment.Carefulattentionshouldbegiventotherequirementsofstandardsoninstallationearthingpractice.NETWORKINTERFACETXRXOUTPUTINPUTOUTPUTINPUTRXTERMINALEQUIPMENTINTERFACETXFigure1SIST EN 300 689 V1.2.1:2004
ETSIETSIEN300689V1.2.1(2001-07)104.1.1SocketsRequirement:Theterminalequipmentinterfaceshallprovidetwocoaxial75Ωsockets,oneeachfortransmitandreceive;thesesocketsbeingeither:a)75Ωsockets(type1,6/5,6)complyingwithIEC60169-13[2];orb)75ΩBNCsocketscomplyingwiththegeneralrequirementsofIEC60169-8[1]withthematingdimensionsspecifiedinannexBofISO/IEC10173[3].Theouterconductorofthecoaxialpairshallbeconnectedtosignalgroundbothattheinputportandattheoutputport.Test:Thereshallbeavisualinspectionthatthesocketsareofthecorrecttype.4.1.2PlugsRequirement:Theterminalequipmentinterfaceshallprovidetwocoaxial75Ωplugsattheendofacord(orcords),oneeachfortransmitandreceive;theseplugsbeingeither:a)75Ωplugs(type1,6/5,6)complyingwithIEC60169-13[2];orb)75ΩBNCplugscomplyingwiththegeneralrequirementsofIEC60169-8[1]withthematingdimensionsspecifiedinannexBofISO/IEC10173[3].Theouterconductorofthecoaxialpairshallbeconnectedtosignalgroundbothattheinputportandattheoutputport.NOTE:Thereisnorequirementonthemethodofconnectionofthecord(orcords)totheterminalequipment.Test:Thereshallbeavisualinspectionthattheplugsareofthecorrecttype.4.2Electricalcharacteristics4.2.1Outputport4.2.1.1SignalcodingRequirement:ThesignaltransmittedattheoutputportshallcomplywiththeHighDensityBipolarcode3(HDB3)encodingrules(seeannexB).Test:ThetestshallbeconductedaccordingtoclauseA.2.1.4.2.1.2WaveformshapeRequirement:Thepulseattheoutputportshallcomplywiththerequirementsgivenintable1andfigure2;basedonITU-TRecommendationG.703[4].Table1:WaveformshapeatoutputportPulseshape(nominallyrectangular)Allmarksofavalidsignalshallconformwiththemask(seefigure2).ThevalueVcorrespondstothenominalpeakvoltageofamark.Testloadimpedance75Ωnon-reactiveNominalpeakvoltageVofamark1,0VPeakvoltageofaspace0±0,1VNominalpulsewidth14,55nsRatiooftheamplitudesofpositiveandnegativepulsesatthecentreofthepulseinterval0,95to1,05Ratioofthewidthsofpositiveandnegativepulsesatthenominalhalfamplitude0,95to1,05SIST EN 300 689 V1.2.1:2004
ETSIETSIEN300689V1.2.1(2001-07)1117ns(14,55+2,45)8,65ns(14,55-5,90)14,55ns12,1ns(14,55-2,45)V1,00,50Nominalpulse29,1ns(14,55+14,55)0,20,10,10,20,20,10,10,10,124,5(14,55+9,95)Figure2:Pulsemaskfor34Mbit/spulseTest:ThetestshallbeconductedaccordingtoclauseA.2.2.4.2.1.3OutputtimingTheterminalequipmentmayderiveitstimingfrom:a)aninternalsource(e.g.aninternalclock);b)anexternalreferencesignalinput;c)thereceivedsignalattheinputport.Requirement:Foreachofthetimingarrangementsintendedforuse,thebitrateattheoutputportshallbewithinthelimitsof34368kbit/s±20partspermillion(ppm),whenanyrelevantexternalsignal,includingthereceivedsignalattheinputport,iswithinitsstatedtolerance.NOTE:Thetoleranceof±20ppmrelatestothetransmissioncapabilityoftheleasedline.Tighterlimitsmaybeneededtoensuresatisfactoryend-to-endinterworkingwiththedistantterminalequipment.SIST EN 300 689 V1.2.1:2004
ETSIETSIEN300689V1.2.1(2001-07)12Test:ThetestshallbeconductedaccordingtoclauseA.2.3.4.2.1.4OutputreturnlossRequirement:Theoutputreturnlossattheterminalequipmentinterface,withrespectto75Ω,shallbegreaterthanorequaltothevaluesgivenintable2,whichistakenfromannex3ofETS300166(seeannexE).Table2:OutputportminimumreturnlossFrequencyrangeReturnloss860kHzto1720kHz1720kHzto51550kHz6dB8dBTest:ThetestshallbeconductedaccordingtoclauseA.2.6.4.2.1.5OutputjitterRequirement:Thepeak-to-peakoutputjittershallnotexceedthelimitsoftable3whenmeasuredwithabandpassfilterwithlinearcut-offwiththedefinedcut-offfrequencies.Atfrequenciesbelowthelower3dBpoint,theattenuationofthehighpassfiltershallrisewithavaluegreaterthan,orequalto,20dBperdecade.Atfrequenciesabovetheupper3dBpoint,theattenuationofthelowpassfiltrationshallrisewithavaluegreaterthan,orequalto,60dBperdecade.Forthepurposeoftesting,anysignalinputfromwhichtheoutputtimingisderivedshallbeprovidedwiththemaximumtolerableinputjitter,andwiththemaximumtolerableinputfrequencydeviation,asspecifiedbythemanufacturer.Wheretheoutputtimingoftheterminalequipmentistakenfromtheleasedline,theinputtotheterminalequipmentshallbeprovidedwithcomponentsofsinusoidaljitteratpointsonthecurveoffigure3andtable5.Table3:MaximumoutputjitterMeasurementfilterbandwidthOutputjitterLowercut-off(highpass)Uppercut-off(lowpass)UnitInterval(UI)peak-to-peak(maximum)100Hz800kHz0,410kHz800kHz0,15NOTE:Thesevaluesarechosentoallowforjitterbuild-upinusernetworksandmaybedifferentfromITU-TRecommendations.Test:ThetestshallbeconductedaccordingtoclauseA.2.7.4.2.1.6OutputframestructureTherequirementofthisclauseappliestoterminalequipmentforconnectiontotheD34Sleasedline.ForterminalequipmentsforconnectiontotheD34Uleasedline,thereisnorequirementonthestructureoftheoutputbitstream.Requirement:ForterminalequipmentsforconnectiontotheD34Sleasedline,thebitstreamtransmittedattheoutputoftheterminalequipmentshallbestructuredasdefinedinannexC.Bit1ofbyteMaintenanceandAdaptation(MA),aRemoteDefectIndication(RDI),shallbesetto"1"within250µsofthedetectionoflossofreceivedframealignment(seeclause4.2.2.8),andsetto"0"within250µsongainingframealignment.Test:ThetestshallbeconductedaccordingtoclauseA.2.8andA.2.9.SIST EN 300 689 V1.2.1:2004
ETSIETSIEN300689V1.2.1(2001-07)134.2.2Inputport4.2.2.1SignalcodingRequirement:TheinputportshalldecodewithouterrorHDB3encodedsignalsinaccordancewithHDB3encodingrules(seeannexB).Test:ThetestshallbeconductedaccordingtoclauseA.2.4.4.2.2.2InputreturnlossRequirement:Theinputreturnlosswithrespectto75Ωattheinterfaceshallbegreaterthanorequaltothevaluesgivenintable4,whichistakenfromclause11.3ofITU-TRecommendationG.703[4].Table4:InputportminimumreturnlossFrequencyrangeReturnloss860kHzto1720kHz1720kHzto34368kHz34368kHzto51550kHz12dB18dB14dBTest:ThetestshallbeconductedaccordingtoclauseA.2.5.4.2.2.3InputlosstoleranceRequirement:Theinputportshalldecodewithouterrorsa34368kbit/ssignalasdefinedinclauses4.2.1.1and4.2.1.2abovebutmodifiedbyacableorartificialcablewiththefollowingcharacteristics:a)attenuationthatfollowsa√flawwithvaluesthroughouttherange0dBto12dBat17184kHz;andb)characteristicimpedanceof75Ωwithatoleranceof±20%overthefrequencyrangefrom860kHzto51550kHz.Test:ThetestshallbeconductedaccordingtoclauseA.2.4.4.2.2.4ImmunityagainstreflectionsRequirement:Whenasignalcomprisingacombinationofanormalsignalandaninterferingsignalisappliedtotheinputport,viaanartificialcablewithalossintherange0dBto12dBat17184kHz,noerrorsshallresultduetotheinterferingsignal.ThenormalsignalshallbeasignalencodedaccordingtoHDB3,shapedaccordingtothemaskoffigure2,withabinarycontentinaccordancewithaPRBS(223-1).Theinterferingsignalshallbethesameasthenormalsignalexceptthatthelevelshallbeattenuatedby20dB,thebitrateshallbewithin34368kbit/s±20ppmandthetimingshallnotbesynchronizedtothenormalsignal.Test:ThetestshallbeconductedaccordingtoclauseA.2.4.4.2.2.5InputjittertoleranceRequirement:Theterminalequipmentshalltolerateatitsinputportthemaximuminputjitterasshowninfigure3andtable5(takenfromITU-TRecommendationG.823(seeannexE)).NOTE:Terminalequipmentwithmorethanoneinputwillnormallyneedtobedesignedwithawanderbufferofatleast18microseconds,however,toaccommodatethewanderthatmaybeproducedbySynchronousDigitalHierarchy(SDH)networks,upto40microsecondsmaybeneeded.SIST EN 300 689 V1.2.1:2004
ETSIETSIEN300689V1.2.1(2001-07)14peak-to-peakjitterjitterfrequencyf1f2f3f4A1A2Figure3:InputjittertoleranceTable5:InputjittertolerancePeak-to-peakamplitude(UI)FrequencyA1A2f1f2f3f41,50,15100Hz1kHz10kHz800kHzTest:ThetestshallbeconductedaccordingtoclauseA.2.7.4.2.2.6InputclocktoleranceRequirement:Theterminal
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