SIST EN 300 688 V1.2.1:2003

• Abstract:

  Specification of the performance requirement for the connection through the public network, including test procedures for compliance. Revision of ETS 300 688 to improve the safety related aspects following a liaison received from TC safety.

• Status: Published
• Publication Date: 30-Nov-2003
• ICS: 33.040.50 - Lines, connections and circuits
• 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 300 688 V1.2.1 (2001-07) - Access and Terminals (AT); 140 Mbit/s digital leased lines (D140U and D140S); Connection characteristics

SIST EN 300 688 V1.2.1:2003 is the Slovenian adoption of ETSI EN 300 688 Version 1.2.1 for Access and Terminals (AT). It specifies the connection characteristics and conformance tests for point-to-point 140 Mbit/s digital leased lines, so operators, equipment suppliers, test labs, and buyers can check how the line behaves at the network termination points (NTPs).

What does SIST EN 300 688 V1.2.1:2003 specify?

SIST EN 300 688 V1.2.1:2003 specifies the technical requirements and compliance tests for the connection of 140 Mbit/s digital leased lines over the public network. The standard covers both D140U and D140S services and sets the limits that apply to signal transfer, structure, timing, delay, jitter, error performance, and availability-related topics.

The document is organized around clause 4 for requirements and annexes for test methods and supporting material. Annex A gives the normative test methods, Annex B defines the D140S frame structure, and Annexes C to F provide informative background, guidance, and references.

Annex	What it covers
A	Test methods for compliance
B	Definition of the frame structure at 139 264 kbit/s
C	Derivation of error performance limits
D	Availability guidance
E	Bringing Into Service (BIS) limits
F	Bibliography

What are the key requirements of SIST EN 300 688 V1.2.1:2003?

SIST EN 300 688 V1.2.1:2003 uses the ITU-T attribute technique to state connection requirements, and clause 4 groups them into transfer rate, information transfer susceptance, structure, establishment of connection, symmetry, connection configuration, and network performance. In practice, this means the line is judged as a connection service, not just as a bit pipe.

Transfer rate and information transfer

Clause 4.1.1 requires the leased line to carry user timing at 139 264 kbit/s, with a tolerance of ±15 ppm, and clause 4.1.1.2 sets the nominal information rate for D140U and D140S. Clause 4.1.2 requires unrestricted digital information transfer with bit-sequence integrity. For a user, this means the service must pass digital traffic transparently at the declared rate.

Structure and symmetry

Clause 4.1.3 requires D140S to preserve the defined frame structure end to end, including the position of the frame alignment bytes FA1 and FA2. Clause 4.1.3.2 requires AIS (Alarm Indication Signal) at the far end when there is no input signal. Clause 4.1.4 requires the connection to be symmetrical in both directions. In practice, these checks confirm that a structured service stays framed correctly and that both directions behave the same way.

Delay, jitter, and error performance

Clause 4.1.5.1 sets one-way delay limits, with one limit for terrestrial routes and another when satellite transmission is involved. Clause 4.1.5.2 sets jitter tolerance at the network input port and maximum jitter at the network output port using band-limited measurements. Clause 4.1.5.3 sets error-performance objectives using ESR, SESR, and BBER, with separate terrestrial and satellite figures. This matters when accepting a line because the service must not only work, but also stay within measurable quality limits.

Bringing into service and availability

Clause 4.1.5.3.1 states that there is no BIS limit requirement in the main body of the standard, while clause 4.1.5.4 states that there is no availability requirement. The annexes still give guidance for these topics, so operators can use them in commissioning or contract discussions even though they are not mandatory requirements here.

What terms does SIST EN 300 688 V1.2.1:2003 define?

• AIS (Alarm Indication Signal) - an all-ones signal sent to indicate loss of input signal.
• BBE (Background Block Error) - an errored block that is not part of a severely errored second.
• BBER (Background Block Error Ratio) - the ratio of background block errors to total blocks, excluding unavailable periods.
• ES (Errored Second) - a one-second period containing one or more errored blocks.
• SES (Severely Errored Second) - a one-second period with a high error concentration or a severely disturbed period.
• NTP (Network Termination Point) - the physical access point where the public network is presented to the user.
• PRBS (Pseudo Random Bit Sequence) - the bit pattern used for test signals and performance checks.

Who uses SIST EN 300 688 V1.2.1:2003?

SIST EN 300 688 V1.2.1:2003 is used by public telecommunications network operators that offer 140 Mbit/s leased lines, and by terminal equipment suppliers who need their equipment to interwork with those lines. It is also used by test laboratories and commissioning teams that verify timing, delay, jitter, framing, and error performance at the NTP.

Quality managers and buyers use it to define what performance they should ask for when procuring a D140U or D140S service. For structured services, it also helps when checking whether monitoring can be done in service or whether a line must be taken out of service for measurement.

What changed in SIST EN 300 688 V1.2.1:2003 from the previous edition?

The scope states that this version is a revision of ETS 300 688 to improve the safety-related aspects following a liaison received from TC safety. The foreword also says the present document introduces necessary changes. The standard remains focused on connection characteristics and conformance testing for 140 Mbit/s digital leased lines.

Which standards are used with SIST EN 300 688 V1.2.1:2003?

• EN 300 686 - defines the network interface presentation for 34 Mbit/s and 140 Mbit/s digital leased lines.
• ITU-T O.151 - provides the error performance measuring equipment referred to in the test methods.
• ITU-T O.171 - provides the jitter and wander measuring equipment used for jitter tests.
• ETS 300 337 - is referenced for the 8 kHz framing structure used by D140S.
• ITU-T G.832 - is referenced for the frame and multiplexing structure behind the D140S framing model.
• ITU-T G.114, G.823, G.826, and M.2100 - support the delay, jitter, error performance, and test-limit derivations used in the clauses and annexes.

What does the SIST EN 300 688 V1.2.1:2003 document contain?

The document contains detailed requirement tables for D140U and D140S, plus normative test methods in Annex A for timing, transfer rate, delay, jitter, error performance, frame integrity, and loss of input signal. It also includes figures for test setups and for the D140S frame structure, so laboratories can apply the same measurement approach on both ends of the line.

Annex C explains how the error-performance limits were derived from reference terrestrial and satellite connections. Annex D gives availability concepts and recommended target values, and Annex E gives BIS limit guidance for 24-hour and 2-hour tests.

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Access and Terminals (AT); 140 Mbit/s digital leased lines (D140U and D140S); Connection characteristics33.040.50Vodi, zveze in tokokrogiLines, connections and circuitsICS:Ta slovenski standard je istoveten z:EN 300 688 Version 1.2.1SIST EN 300 688 V1.2.1:2003en01-december-2003SIST EN 300 688 V1.2.1:2003SLOVENSKI
STANDARD
ETSIEN300688V1.2.1(2001-07)EuropeanStandard(Telecommunicationsseries)AccessandTerminals(AT);140Mbit/sdigitalleasedlines(D140UandD140S);ConnectioncharacteristicsSIST EN 300 688 V1.2.1:2003

ETSIETSIEN300688V1.2.1(2001-07)2ReferenceREN/AT-020016Keywordsaccess,digital,leasedline,ONPETSI650RoutedesLuciolesF-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 300 688 V1.2.1:2003

ETSIETSIEN300688V1.2.1(2001-07)3ContentsIntellectualPropertyRights.5Foreword.5Introduction.51Scope.62References.63Definitionsandabbreviations.73.1Definitions.73.2Abbreviations.84Requirements.84.1Attributes.94.1.1Transferrate.94.1.1.1Leasedlinetiming.94.1.1.2Informationtransferrate.104.1.2Informationtransfersusceptance.104.1.3Structure.104.1.3.1Frameintegrity.104.1.3.2Lossofinputsignal.104.1.4Symmetry.104.1.5Networkperformance.114.1.5.1Transmissiondelay.114.1.5.2Jitter.114.1.5.2.1Jittertoleranceatthenetworkinputport.114.1.5.2.2Maximumjitteratthenetworkoutputport.124.1.5.3Errorperformance.124.1.5.3.1BringingIntoService(BIS)limits.124.1.5.3.2Performancelevel.134.1.5.4Availability.13AnnexA(normative):Testmethods.14A.1General.14A.1.1Equipmentconnection.14A.2Testmethods.15A.2.1Leasedlinetiming,informationtransferrate,susceptanceandsymmetry.15A.2.2Delay.16A.2.3Jitter.17A.2.4Errorperformance.19A.2.5Structure-frameintegrity.20A.2.6Structure-lackofinputsignal.21AnnexB(normative):Definitionofframestructure.22B.1Framestructureat139364kbit/s.22AnnexC(informative):Derivationoferrorperformancelimits.24C.1Introduction.24C.2Referenceconnections.24C.2.1Terrestrialconnection.24C.2.2Satelliteconnection.25C.3Errorperformanceobjectives.25C.4Longtermerrorperformance.26SIST EN 300 688 V1.2.1:2003

ETSIETSIEN300688V1.2.1(2001-07)4AnnexD(informative):Availability.27D.1General.27D.1.1Unavailability.27D.1.2Outageintensity.27D.1.3Meantimebetweenfailures.27D.1.4Meantimetorestoreservice.27D.2Recommendations.27AnnexE(informative):BringingIntoService(BIS)limits.29E.1General.29E.2BISlimits.29AnnexF(informative):Bibliography.30History.31SIST EN 300 688 V1.2.1:2003

ETSIETSIEN300688V1.2.1(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)toprovidestandardsforsupportoftheDirectiveonOpenNetworkProvision(ONP)ofleasedlines(92/44/EEC).Thereisoneotherstandardthatisdirectlyrelatedtothepresentdocument:-EN300686:"AccessandTerminals(AT);34Mbit/sand140Mbit/sdigitalleasedlines(D34U,D34S,D140U,D140S);Networkinterfacepresentation".ThepresentdocumentisbasedoninformationfromITU-TRecommendationsandETSIpublications;therelevantdocumentsarequotedwhereappropriate.NationaltranspositiondatesDateofadoptionofthisEN:29June2001DateoflatestannouncementofthisEN(doa):30September2001DateoflatestpublicationofnewNationalStandardorendorsementofthisEN(dop/e):31March2002DateofwithdrawalofanyconflictingNationalStandard(dow):31March2002IntroductionTheCouncilDirectiveontheapplicationofONPtoleasedlines(92/44/EEC)concernstheharmonizationofconditionsforopenandefficientaccessto,anduseof,theleasedlinesprovidedoverpublictelecommunicationsnetworks,andtheavailabilitythroughouttheEuropeanUnionofaminimumsetofleasedlineswithharmonizedtechnicalcharacteristics.The140Mbit/sunstructuredandstructuredleasedlinesarenotpartoftheminimumsetofleasedlinesundertheDirective,however,thepresentdocumentisbeingwrittenwiththeintentionthatwhere140Mbit/sleasedlinesareoffered,theywillbeinaccordancewiththeseharmonizedstandards.UndertheDirective91/263/EEC(seeannexF),laterreplacedby98/13/EC(seeannexF),terminalequipmentforconnectiontotheseleasedlineswasrequiredtofulfilcertainessentialrequirements.Thepresentversionofthepresentdocumenthasbeenproducedtointroducesomenecessarychanges.SIST EN 300 688 V1.2.1:2003

ETSIETSIEN300688V1.2.1(2001-07)61ScopeThepresentdocumentspecifiesthetechnicalrequirementsandconformancetestsforconnectioncharacteristicsofpoint-to-point140Mbit/sdigitalleasedlines.Theseleasedlinesoperateat:-139264kbit/sprovidinganinformationtransmissioncapability,withoutrestrictiononbinarycontent,(D140U);and-139264kbit/sprovidinganinformationtransmissioncapability,withoutrestrictiononbinarycontent,of138240kbit/s,(D140S);theremaining1024kbit/sprovidesan8kHzframingstructureinaccordancewithETS300337(ITU-TRecommendationG.832)(seeannexF).AconnectionispresentedviainterfacesatNetworkTerminationPoints(NTPs)andincludesanyequipmentthatmayprovidetheNTP.SignalsbetweenNTPsaresubjecttoimpairmentsduringtheirtransferovertheconnection.Thelimitstotheseimpairmentsarestatedinthepresentdocument.Thepresentdocument,togetherwiththecompanionstandardEN300686[1],definingthenetworkinterfacepresentation,describesthetechnicalcharacteristicsoftheleasedline.Thetestsspecifiedinthepresentdocumentcannotbecarriedoutbytheleasedlineproviderwhiletheleasedlineisinservice,i.e.carryingusers'traffic.Thusthetestsaredesignedforbringingintoandreturningintoservice,althoughthereisnoobligationtoperformthesetestseachtimealeasedlineisbroughtintoorreturnedintoservice.However,iftheconnectionisstructured,theerrorperformancemaybemonitoredbytheleasedlineproviderwhilethelineisinservice.Thepresentdocumentisapplicableforleasedlines,includingparttimeleasedlines,forwhichtheestablishmentorreleasedoesnotrequireanyprotocolexchangeorotherinterventionattheNTP.Thepresentdocumentspecifiestheconformancetestsfortheconnectionrequirements.Thepresentdocumentdoesnotincludedetailsconcerningtheimplementationofthetests,nordoesitincludeinformationonanyrelevantregulations.2ReferencesThefollowingdocumentscontainprovisionswhich,throughreferenceinthistext,constituteprovisionsofthepresentdocument.• Referencesareeitherspecific(identifiedbydateofpublication,editionnumber,versionnumber,etc.)ornon-specific.• Foraspecificreference,subsequentrevisionsdonotapply.• Foranon-specificreference,thelatestversionapplies.[1]ETSIEN300686:"AccessandTerminals(AT);34Mbit/sand140Mbit/sdigitalleasedlines(D34U,D34S,D140U,D140S);Networkinterfacepresentation".[2]ITU-TRecommendationO.151(1992):"Errorperformancemeasuringequipmentoperatingattheprimarybitrateandabove".[3]ITU-TRecommendationO.171(1997):"Timingjitterandwandermeasuringequipmentfordigitalsystemswhicharebasedontheplesiochronousdigitalhierarchy(PDH)".SIST EN 300 688 V1.2.1:2003

ETSIETSIEN300688V1.2.1(2001-07)73Definitionsandabbreviations3.1DefinitionsForthepurposesofthepresentdocument,thefollowingtermsanddefinitionsapply:BackgroundBlockErrorRatio(BBER):ratiooferroredblockstototalblocksduringafixedmeasurementintervalexcludingallblocksduringseverelyerroredsecondsandwhiletheleasedlineconnectionisintheunavailablestateBackgroundBlockError(BBE):erroredblocknotoccurringaspartofaseverelyerroredsecondblock:setofconsecutivebitsequivalenttooneframe;eachbitbelongstooneandonlyoneblock.Thelengthofeachblockcorrespondstoaperiodof125microsecondserroredblock:blockinwhichoneormorebitsareinerrorErroredSecond(ES):one-secondperiodwithoneormoreerroredblocksErroredSecondsRatio(ESR):ratiooferroredsecondstototalsecondsduringafixedmeasurementinterval.TheESRisnotevaluatedwhiletheleasedlineconnectionisintheunavailablestateframe:repetitivesetofconsecutivebitsinwhichthepositionofeachbitcanbeidentifiedbyreferencetoaframealignmentsignalframealignmentsignal:distinctivesignalinsertedineveryframealwaysoccupyingthesamerelativepositionwithintheframeandusedtoestablishandmaintainframealignmentleasedlines:telecommunicationsfacilitiesprovidedbyapublictelecommunicationsnetworkthatprovidedefinedtransmissioncharacteristicsbetweennetworkterminationpointsandthatdonotincludeswitchingfunctionsthattheusercancontrol(e.g.on-demandswitching)NetworkTerminationPoint(NTP):allphysicalconnectionsandtheirtechnicalaccessspecificationswhichformpartofthepublictelecommunicationsnetworkandarenecessaryforaccesstoandefficientcommunicationthroughthatpublicnetworkPRBS(223-1):PseudoRandomBitSequence(PRBS)(asdefinedinclause2.2ofITU-TRecommendationO.151)satellitetransmission:transmissionviaanearthorbitingsatelliteseverelydisturbedperiod:forout-of-servicemeasurements,aseverelydisturbedperiodoccurswhen,overaperiodoftimeequivalenttofourcontiguousblocks,eitherallthecontiguousblocksareaffectedbyahighbiterrordensityof≥10-2,oralossofsignalisobserved.Forin-servicemonitoringpurposes,aseverelydisturbedperiodisestimatedbytheoccurrenceoflossofsignalorlossofframealignmentSeverelyErroredSecond(SES):one-secondperiodwhichcontains≥30%erroredblocksoratleastoneseverelydisturbedperiodSeverelyErroredSecondsRatio(SESR):ratioofseverelyerroredsecondstototalsecondsduringafixedmeasurementinterval.TheSESRisnotevaluatedwhiletheleasedlineconnectionisintheunavailablestateunavailabilityperiod:unavailabilityperiodbeginsattheonsetof10consecutiveSES.These10secondsareconsideredtobepartoftheunavailabilityperiod.Theunavailabilityperiodendsattheonsetof10consecutivenon-severelyerroredseconds.These10secondsarenotconsideredpartoftheunavailabilityperiodunavailablestate:leasedlineconnectionisintheunavailablestateifanunavailabilityperiodisoccurringinoneorbothdirectionsoftransmissionSIST EN 300 688 V1.2.1:2003

ETSIETSIEN300688V1.2.1(2001-07)83.2AbbreviationsForthepurposesofthepresentdocument,thefollowingabbreviationsapply:AISAlarmIndicationSignalBBEBackgroundBlockErrorBBERBackgroundBlockErrorRatioBIP-8BitInterleavedParity(8bit)BISBringingIntoServiceCMICodedMarkInversionD140U140Mbit/sdigitalunstructuredleasedlineD140S140Mbit/sdigitalstructuredleasedlineEMErrorMonitoringEMCElectroMagneticCompatibilityESErroredSecondESRErroredSecondsRatioFA1FrameAlignmentbyte1FA2FrameAlignmentbyte2GCGeneralpurposeCommunicationschannelLSBLeastSignificantBitMAMaintenanceandAdaptationMSBMostSignificantBitNRNetworkoperatorbyteNTPNetworkTerminationPointONPOpenNetworkProvisionppmpartspermillionPRBSPseudoRandomBitSequenceRDIRemoteDefectIndicationREIRemoteErrorIndicationRPOReferencePerformanceObjectiveRXRXisasignalinput(ateithertheleasedlineinterfaceorthetestequipment)SESSeverelyErroredSecondSESRSeverelyErroredSecondsRatioTMTimingMarkerTRTRailtraceTXTXisasignaloutput(ateithertheleasedlineinterfaceorthetestequipment)UIUnitInterval4RequirementsTheperformanceoftheleasedlineshallcomplywiththeserequirementsonlyiftheconditionsofsupplyofthenetworkequipmentprovidingtheNTParemet,(e.g.iftheequipmentisconnectedtoanappropriatepowersupplyonthecustomer'spremises).TheITU-Tattributetechniqueisusedtoexpresstheconnectionrequirements.ThefollowingattributesfromITU-TRecommendationI.140(seeannexF)arespecifiedinthepresentdocument:-transferrate;-informationtransfersusceptance;-structure;-establishmentofconnection;-symmetry;-connectionconfiguration;-networkperformance.SIST EN 300 688 V1.2.1:2003

ETSIETSIEN300688V1.2.1(2001-07)9Thefollowingnetworkperformancesub-attributesareconsideredrelevantforthepresentdocument:-transmissiondelay;-jitter;-error;-availability.4.1AttributesTheconnectionattributesaredisplayedintable1.Ineffect,theseattributesdefinetheservicebeingoffered.Thevaluesandtheassociatedcompliancetestscanbefoundinthesubsequentclauses.Table1:ConnectionattributesD140UD140SConnectiontypeattributesValue/natureTransferrate-leasedlinetiming-informationtransferrate139264kbit/s±15ppm139264kbit/s±15ppm139264kbit/s±15ppm138240kbit/s±15ppmInformationtransfersusceptanceUnrestricteddigitalStructureUnstructuredFrameintegrityEstablishmentofconnectionWithoutuserinterventionSymmetrySymmetricalinbothdirectionsConnectionconfigurationPoint-to-pointTransmissiondelay-terrestrial(fordistanceGinkm)-satellite≤(10+0,01G)ms≤350msJitteratinputport0,4UIfrom200Hzto500Hz0,075UIfrom10kHzto3500kHzJitteratoutputport1,5UIfrom200Hzto3500kHz0,075UIfrom10kHzto3500kHzAvailabilityNorequirementErrorparametersD140UandD140STerrestrialSatelliteEnd-to-endperformanceobjectives-ErroredSecondsRatio(ESR)-SeverelyErroredSecondsRatio(SESR)-BackgroundBlockErrorRatio(BBER)≤8,00%≤0,10%≤0,01%≤12,480%≤0,156%≤0,016%Performancelevelsovera24hourperiod-ErroredSeconds(ES)-SeverelyErroredSeconds(SES)-BackgroundBlockErrors(BBE)≤6746≤68≤68594≤10575≤112≤1071704.1.1Transferrate4.1.1.1LeasedlinetimingRequirement:Theleasedlineshallbecapableofcarryingusertimingwithintherangeof139264kbit/s±15ppm.Theleasedlineprovidermayalsooffertotheuserincertaininstallationsthecapabilityfortheleasedlinetobesynchronizedtonetworktiming.NOTE:Networktimingistimingthatisderivedfromthesourceorsourcesoftimingthatareusedforthenetwork(i.e.anationalprimaryreferenceclock).Thusthetimingprovidedbytheleasedlinewillbesimilartothatprovidedbyotherdigitalservices.Test:ThetestshallbeconductedaccordingtoclauseA.2.1.SIST EN 300 688 V1.2.1:2003

ETSIETSIEN300688V1.2.1(2001-07)104.1.1.2InformationtransferrateRequirement:Theconnectionshallbecapableoftransferringanominalinformationrate,definedintable2.Table2:InformationtransferrateD140UD140SInformationtransferrate139264kbit/s±15ppm138240kbit/s±15ppmTest:ThetestshallbeconductedaccordingtoclauseA.2.1.4.1.2InformationtransfersusceptanceRequirement:Theconnectionshallbecapableoftransferringunrestricteddigitalinformationwithbitsequenceintegrityatthenominalrate,definedintable3.Table3:InformationtransfersusceptanceD140UD140SInformationtransfersusceptance139264kbit/s±15ppm138240kbit/s±15ppmTest:ThetestshallbeconductedaccordingtoclauseA.2.1.4.1.3Structure4.1.3.1FrameintegrityTherequirementofthisclauseappliesonlytotheD140Sstructuredleasedline.Requirement:WhenasignalwiththestructuredefinedinannexBisappliedtotheinputoftheD140Sleasedline,theoutputsignalatthefarendshallalsoconformtothestructuredefinedinannexBandtheframealignmentbyte(FA1andFA2)shallbeinthesamepositioninrelationtothecontentsofthepayload.Test:ThetestshallbeconductedaccordingtoclauseA.2.5.4.1.3.2LossofinputsignalRequirement:Whenthereisnoinputsignaltotheleasedline,theoutputsignalatthefarendoftheleasedlineshallbeAlarmIndicationSignal(AIS)(allones).Test:ThetestshallbeconductedaccordingtoclauseA.2.6.4.1.4SymmetryRequirement:Theconnectionshallbesymmetrical,i.e.eachdirectionoftransmissionshallhavethesameinformationtransfercapability(D140UandD140S)andthesameframestructure(D140S).Test:ThetestshallbeconductedaccordingtoclauseA.2.1.SIST EN 300 688 V1.2.1:2003

ETSIETSIEN300688V1.2.1(2001-07)114.1.5NetworkperformanceThenetworkperformancesub-attributesaredisplayedintable1.Thevaluesandtheassociatedcompliancetestscanbefoundinthesubsequentclauses.4.1.5.1TransmissiondelayRequirement:Therequirementdependsuponwhethersatellitetransmissionisinvolvedintheconnectionornot:a)forconnectionswheresatellitetransmissionisnotinvolved,theonewayend-to-enddelayshallbelessthanorequalto(10+0,01G)ms,whereGisthegeographicaldistanceinkilometres,asshowninfigure1;orDelay(ms)Geographicaldistance(km)1000900030006000100Figure1:Upperlimitofdelayb)forconnectionswheresatellitetransmissionisinvolved,theonewayend-to-enddelayshallbelessthanorequalto350ms.NOTE:Requirementsa)andb)arebasedonITU-TRecommendationG.114,clausesA.2andA.3(seeannexF).Therearenorequirementsforlowfrequency(below20Hz)variationofonewayend-to-enddelayunderthepresentdocument.Test:ThetestshallbeconductedaccordingtoclauseA.2.2.4.1.5.2Jitter4.1.5.2.1JittertoleranceatthenetworkinputportRequirement:Theleasedlineshallfunctionasspecifiedwithinputjitterbeingthesumofthebandlimitedcomponentsdefinedintable4.NOTE:Thejittertolerancefortheconnectionisdefinedinthiswayinsteadofspecifyingsinglejitterfrequencies,forthefollowingreasons:a)thismethodismorerepresentativeofthejitterencounteredinpractice;andb)longregeneratorchainsmaybeespeciallysensitivetosinglejitterfrequencies.SIST EN 300 688 V1.2.1:2003

ETSIETSIEN300688V1.2.1(2001-07)12Table4:ComponentsofinputjitterFiltersforgenerationofjitterspectrum(firstorder)BandpassfilterformeasurementofinputjitterInputjittermeasuredbybandpassfilterLowercut-off(highpass)Uppercut-off(lowpass)(lowercut-offfirstorder)UnitInterval(UI)peak-to-peak(maximum)200Hz500Hz200Hzto3500kHz0,410kHz3500kHz10kHzto3500kHz0,075Test:ThetestshallbeconductedaccordingtoclauseA.2.3.4.1.5.2.2MaximumjitteratthenetworkoutputportRequirement:Themaximumjitterattheoutputportofthenetworkshallnotexceedthelimitsspecifiedintable5,basedonITU-TRecommendationG.823(seeannexF),whenmeasuredwithlinearfilterswiththedefinedcut-offfrequencies.Atfrequenciesbelowthelower3dBpoint,theattenuationofthehighpassfiltershallrisewithavaluegreaterthan,orequalto,20dBperdecade.Atfrequenciesabovetheupper3dBpoint,theattenuationofthelowpassfiltrationshallrisewithavaluegreaterthan,orequalto,60dBperdecade.Forthemeasurement,themaximuminputjitterasspecifiedinclause4.1.5.2.1shallbeapplied.Table5:MaximumnetworkoutputjitterMeasurementfilterbandwidthOutputjitterLowercut-off(highpass)Uppercut-off(lowpass)UIpeak-to-peak(maximum)200Hz3500kHz1,510kHz3500kHz0,075Test:ThetestshallbeconductedaccordingtoclauseA.2.3.4.1.5.3ErrorperformanceErroredseconds,severelyerroredsecondsandbackgroundblockerrorsshallbeexcludedfromthemeasurementoftheerrorperformanceiftheleasedlineisintheunavailablestate.NOTE:Whenmicrowavelinksareusedintheconnectionitmaynotbepossibletomeettherequirementinrareperiodswithveryadversepropagationconditions.Theend-to-enderrorperformanceratesfora140Mbit/sdigitalleasedlineusingterrestrialorsatelliteconnectionsareshownintable6.ThesearebasedonthereferenceconnectionsshowninannexCderivedfromITU-TRecommendationG.826(seeannexF)andarevalidforblocksizesof6000to20000bits.Table6:Endtoenderrorperformanceobjectivesfora140Mbit/sdigitalleasedlinePerformanceparameterTerrestrialSatelliteESR8,00%12,480%SESR0,10%0,156%BBER0,01%0,016%Thesefiguresfortheerrorperformanceareusedinthederivationoftheperformancelevelsgiveninclause4.1.5.3.2.ThederivationofthesefiguresisgiveninannexC.4.1.5.3.1BringingIntoService(BIS)limitsThereisnorequirementonBISlimitsunderthepresentdocument.NOTE:AnnexEprovidesguidelineson24hourand2hourBISlimits.SIST EN 300 688 V1.2.1:2003

ETSIETSIEN300688V1.2.1(2001-07)134.1.5.3.2PerformancelevelTheperformancelevelofanunstructuredleasedlineinservice(i.e.carryinguserdata)cannotbeestimatedbytheleasedlineprovidersincenobitpatternsequenceisknown.Todeterminetheperformanceleveltheleasedlineneedstobetakenoutofservice(theuserwillnothaveanyaccesstotheleasedlineoranyserviceprovidedduringthemeasurementperiod).Theusermayalsomeasuretheerrorperfor
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