SIST EN 300 688 V1.2.1:2003
(Main)Access and Terminals (AT); 140 Mbit/s digital leased lines (D140U and D140S); Connection characteristics
General Information
- 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
- Current Stage
- 6060 - National Implementation/Publication (Adopted Project)
- Start Date
- 01-Dec-2003
- Due Date
- 01-Dec-2003
- Completion Date
- 01-Dec-2003
Overview
SIST EN 300 688 V1.2.1:2003 is a Slovenian adoption of the European standard produced by ETSI (European Telecommunications Standards Institute) for Access and Terminals (AT), focusing on the connection characteristics of 140 Mbit/s digital leased lines (D140U and D140S). This standard specifies the performance requirements and compliance test procedures for these high-capacity digital links operating through the public telecommunications network. This version also includes revisions to enhance safety aspects according to recommendations from the Technical Committee on Safety.
The standard is essential for ensuring reliable, standardized interconnection of equipment using digital leased lines at 140 Mbit/s, promoting interoperability and quality within European telecommunications infrastructure.
Key Topics
- Connection Characteristics: Defines the technical and performance attributes for point-to-point 140 Mbit/s leased lines (both unstructured - D140U, and structured - D140S).
- Performance Requirements: Includes specifications on transfer rates, information transfer integrity, symmetry, structure (such as frame integrity for D140S), and network performance (addressing delay, jitter, error rates, and availability).
- Testing and Compliance: Outlines test principles and methodologies to verify conformance, primarily aimed at service initiation and re-initiation periods, not active customer use.
- Safety Improvements: Incorporates changes to align with updated safety requirements for telecommunications equipment.
- Harmonization: Ensures compatibility with EU directives and other international recommendations, supporting open network provision and operator-independent telecommunications services.
Applications
This standard is crucial for telecommunications providers, network equipment manufacturers, and enterprises requiring high-capacity, dedicated data links. Key practical applications include:
- Carrier-Grade Data Transport: Provides a common technical basis for carriers offering point-to-point 140 Mbit/s services, ensuring reliable and interoperable leased circuit provisioning.
- Enterprise Connectivity: Facilitates secure, high-bandwidth connectivity for large businesses or data centers connected via public telecommunications infrastructure.
- Testing and Certification: Provides standardized methods for network operators and third-party testers to ensure connections meet rigorous performance and safety requirements before service is delivered or resumed.
- International Interconnects: Supports cross-border or cross-operator connections through harmonized European standards, simplifying integration for multinational organizations or projects.
Related Standards
- SIST EN 300 686: Specifies the network interface presentation for both 34 Mbit/s and 140 Mbit/s digital leased lines, closely related and often referenced together with EN 300 688 for comprehensive coverage of interface and connection characteristics.
- ITU-T Recommendations: EN 300 688 references several ITU-T standards, including:
- G.832: Framing structure definitions for 140 Mbit/s leased lines.
- O.151 & O.171: Error and jitter measuring equipment specifications.
- G.114, G.823, G.826: Delay, jitter, and error performance guidance for digital hierarchy and transmission quality.
- European Directives (92/44/EEC, 91/263/EEC, 98/13/EC): The standard upholds requirements driven by EU directives on open network provision and essential terminal equipment compliance.
By adhering to SIST EN 300 688 V1.2.1:2003, telecommunications providers and equipment vendors help ensure a robust, safe, and interoperable high-speed digital leased line service, supporting the broader goals of infrastructure harmonization and seamless connectivity across European networks.
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Frequently Asked Questions
SIST EN 300 688 V1.2.1:2003 is a standard published by the Slovenian Institute for Standardization (SIST). Its full title is "Access and Terminals (AT); 140 Mbit/s digital leased lines (D140U and D140S); Connection characteristics". This standard covers: 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.
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.
SIST EN 300 688 V1.2.1:2003 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 300 688 V1.2.1:2003 is available in PDF format for immediate download after purchase. The document can be added to your cart and obtained through the secure checkout process. Digital delivery ensures instant access to the complete standard document.
Standards Content (Sample)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.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.:+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 300 688 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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