SIST EN 300 689 V1.2.1:2004

• 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
• ICS: 33.040.50 - Lines, connections and circuits
• 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
• Ref Project: ETSI EN 300 689 V1.2.1 (2001-07) - Access and Terminals (AT); 34 Mbit/s digital leased lines (D34U and D34S); Terminal equipment interface

SIST EN 300 689 V1.2.1:2004 is the Slovenian adoption of ETSI EN 300 689 V1.2.1 for Access and Terminals. It specifies the terminal equipment interface for 34 Mbit/s digital leased lines D34U and D34S, including the mechanical and electrical characteristics, the relevant functional behavior and the conformance tests for connection to the public network.

What does SIST EN 300 689 V1.2.1:2004 specify?

SIST EN 300 689 V1.2.1:2004 defines the interface at the network termination point for 34368 kbit/s digital leased lines. It covers both D34U unstructured lines and D34S structured lines, and it is written to make terminal equipment compatible with those leased lines.

The document excludes safety, overvoltage and EMC aspects, and it also leaves customer premises wiring and installation between the terminal equipment and the Network Termination Point (NTP) outside its scope. The structure is straightforward: clauses 1 to 4 cover scope, references, definitions and requirements, and the annexes provide the test methods, code and frame definitions, and the requirements table.

Annex	What it covers
Annex A	Test methods for compliance
Annex B	Definition of HDB3 code
Annex C	Definition of frame structure
Annex D	Requirements Table (RT)
Annex E	Bibliography

What are the key requirements of SIST EN 300 689 V1.2.1:2004?

SIST EN 300 689 V1.2.1:2004 is mainly about how terminal equipment must connect, signal, time and frame the 34 Mbit/s leased line interface. In practice, it tells manufacturers and test labs what must be checked before equipment is declared compatible.

Physical connection

The terminal equipment interface shall provide either two 75 ohm coaxial sockets or two 75 ohm coaxial plugs, one for transmit and one for receive. The outer conductor is connected to signal ground at both input and output. This matters because the connector type and grounding arrangement affect interoperability and EMC behavior in real installations.

Output signal and timing

The output signal shall use HDB3 coding, and the output pulse shape shall meet the mask and electrical limits given in clause 4.2.1.2. The output bit rate shall stay within 34368 kbit/s ±20 ppm for each intended timing arrangement. In practice, this means the equipment must transmit a line signal that other leased-line equipment can decode reliably.

Return loss and jitter

The output and input ports shall meet specified return loss values, and the output and input jitter limits shall be met under the stated measurement conditions. The document also defines the filter bandwidths and the jitter test approach in Annex A. For a reader, this means the interface must not reflect too much signal energy and must tolerate timing variation without bit errors.

D34S frame structure and frame alignment

For D34S, the output and input bit streams shall use the frame structure defined in Annex C. The terminal equipment shall search for FA1 and FA2 frame alignment bytes, obtain and recover frame alignment, and set RDI according to the defined conditions. This is the part that makes the structured service usable for payload transport and error indication.

Error and maintenance bytes

Annex C defines the path overhead fields, including EM for BIP-8 error monitoring, TR for trail trace, MA for maintenance and adaptation, NR for network operator use, and GC for general purpose communications. In practice, these fields carry status, monitoring and maintenance information across the leased line.

What terms does SIST EN 300 689 V1.2.1:2004 define?

• Frame - a repeating set of bits with identifiable positions based on frame alignment.
• Frame alignment signal (FAS) - the signal used to establish and maintain frame alignment.
• Network Termination Point (NTP) - the public network connection point and its technical access specification.
• HDB3 - a modified Alternate Mark Inversion code used on the line interface.
• PRBS(223-1) - a pseudo-random bit sequence used for testing and payload patterns.
• Remote Defect Indication (RDI) - a bit used to signal defects such as invalid input, LOS, LOF or AIS.
• Remote Error Indication (REI) - a bit used to report detected BIP-8 errors back to the remote end.

Who uses SIST EN 300 689 V1.2.1:2004?

SIST EN 300 689 V1.2.1:2004 is used by terminal equipment manufacturers, telecom equipment designers, compliance test laboratories and network operators that provide or interface with D34U and D34S leased lines. It is also relevant for quality and procurement teams checking whether an interface will connect correctly to a public leased line network and pass conformance testing.

What changed in SIST EN 300 689 V1.2.1:2004 from the previous edition?

SIST EN 300 689 V1.2.1:2004 is a revision of the earlier ETS version, and the document states that it introduces necessary changes and improves the safety-related text following a liaison from TC Safety.

Which standards are used with SIST EN 300 689 V1.2.1:2004?

The document references IEC 60169-8 and IEC 60169-13 for the coaxial connector types, and ISO/IEC 10173 for BNC mating dimensions. It uses ITU-T Recommendation G.703 for the physical and electrical characteristics of hierarchical digital interfaces, and ITU-T Recommendations O.151 and O.171 for error-performance and jitter measurement equipment. It also refers to EN 300 686 and EN 300 687 as the companion leased-line standards for network interface presentation and connection characteristics.

What does the SIST EN 300 689 V1.2.1:2004 document contain?

The document contains electrical interface limits, connector requirements, timing and jitter criteria, and the structured frame definition for D34S. Annex A gives the test setups and procedures for signal coding, waveform shape, return loss, jitter, frame structure and frame alignment.

Annex C provides the detailed 34368 kbit/s frame layout, including the overhead bytes, the trail trace identifier format and the CRC-7 procedure. Annex B defines HDB3, while Annex D presents the requirements table that maps each clause to mandatory, optional or conditional status for implementation and conformity checking.

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.:[phone]Fax:[phone]SiretN°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:[e-mail]opartmaybereproducedexceptasauthorizedbywrittenpermission.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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