ETSI EN 300 247 V1.2.1 (2001-07)

Access and Terminals (AT); 2 048 kbit/s digital unstructured lease line (D2048U); Connection characteristics

REN/AT-020017

Dostop in terminali (AT) - Digitalni zakupljeni vodi za prenosno hitrost 2 048 kbit/s in za nestrukturirane signale (D2048U) - Povezavne značilnosti

General Information

• Status: Published
• Publication Date: 03-Jul-2001
• Technical Committee: AT Digital - AT Digital
• Current Stage: 12 - Completion
• Due Date: 06-Jul-2001
• Completion Date: 04-Jul-2001
• Ref Project: SIST EN 300 247 V1.2.1:2003 - Access and Terminals (AT); 2 048 kbit/s digital unstructured lease line (D2048U); Connection characteristics

Standards Content (Sample)

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Access and Terminals (AT); 2 048 kbit/s digital unstructured lease line (D2048U); Connection characteristics33.040.50Vodi, zveze in tokokrogiLines, connections and circuitsICS:Ta slovenski standard je istoveten z:EN 300 247 Version 1.2.1SIST EN 300 247 V1.2.1:2003en01-december-2003SIST EN 300 247 V1.2.1:2003SLOVENSKI
STANDARD



SIST EN 300 247 V1.2.1:2003



ETSIEN300247V1.2.1(2001-07)EuropeanStandard(Telecommunicationsseries)AccessandTerminals(AT);2048kbit/sdigitalunstructuredleasedline(D2048U);ConnectioncharacteristicsSIST EN 300 247 V1.2.1:2003



ETSIETSIEN300247V1.2.1(2001-07)2ReferenceREN/AT-020017Keywordsaccess,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 300 247 V1.2.1:2003



ETSIETSIEN300247V1.2.1(2001-07)3ContentsIntellectualPropertyRights.4Foreword.4Introduction.51Scope.62References.63Definitionsandabbreviations.73.1Definitions.73.2Abbreviations.74Requirements.84.1Attributes.84.1.1Informationtransferrate.94.1.2Informationtransfersusceptance.94.1.3Structure.94.1.4Establishmentofcommunication.94.1.5Symmetry.94.1.6Communicationconfiguration.94.1.7Networkperformance.94.1.7.1Transmissiondelay.94.1.7.2Jitter.104.1.7.2.1Jittertoleranceatthenetworkinputport.104.1.7.2.2Maximumjitteratthenetworkoutputport.114.1.7.3Slip.114.1.7.4Error.114.1.7.4.1Erroredseconds.114.1.7.4.2Severelyerroredseconds.114.1.7.4.3Backgroundblockerrors.12AnnexA(normative):Testmethods.13A.1General.13A.1.1Equipmentconnection.13A.1.2Sequenceofperformingthetests.13A.2Testmethods.13A.2.1Informationtransferrate,susceptance,structureandsymmetry.13A.2.2Delay.14A.2.3Jitter.15A.2.4Errorandslip.16AnnexB(informative):Reductionofthemeasuringperiodforerror.18B.1Introduction.18B.2Explanation.18AnnexC(informative):Bibliography.21History.22SIST EN 300 247 V1.2.1:2003



ETSIETSIEN300247V1.2.1(2001-07)4IntellectualPropertyRightsIPRsessentialorpotentiallyessentialtothepresentdocumentmayhavebeendeclaredtoETSI.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).ThepresentdocumentresultsfromamandatefromtheCommissionoftheEuropeanCommunity(CEC)toprovidestandardsforthesupportoftheDirectiveonOpenNetworkProvision(ONP)ofleasedlines(92/44/EEC).Therearetwootherstandardsdirectlyrelatedtothepresentdocument:-EN300418:"AccessandTerminals(AT);2048kbit/sdigitalunstructuredandstructuredleasedlines(D2048UandD2048S);Networkinterfacepresentation";-EN300248:"AccessandTerminals(AT);2048kbit/sdigitalunstructuredleasedline(D2048U)Terminalequipmentinterface".ThepresentdocumentisbasedoninformationfromITU-TRecommendationsandETSIpublicationsandtherelevantdocumentsarequotedwhereappropriate.NationaltranspositiondatesDateofadoptionofthisEN:29June2001DateoflatestannouncementofthisEN(doa):30September2001DateoflatestpublicationofnewNationalStandardorendorsementofthisEN(dop/e):31March2002DateofwithdrawalofanyconflictingNationalStandard(dow):31March2002SIST EN 300 247 V1.2.1:2003



ETSIETSIEN300247V1.2.1(2001-07)5IntroductionTheCouncilDirectiveontheapplicationofOpenNetworkProvision(ONP)toleasedlines(92/44/EEC)(seeannexC),concernstheharmonizationofconditionsforopenandefficientaccessto,anduseof,theleasedlinesprovidedonpublictelecommunicationsnetworksandtheavailabilitythroughouttheCommunity(EEC)ofaminimumsetofleasedlineswithharmonizedtechnicalcharacteristics.TheconsequenceoftheDirectiveisthatTelecommunicationsOrganizationswithintheEECshallmakeavailableasetofleasedlinesbetweenpointsinthesecountrieswithspecifiedconnectioncharacteristicsandspecifiedinterfaces.UndertheDirective91/263/EEC(seeannexC),laterreplacedby98/13/EC(seeannexC),terminalequipmentforconnectiontotheseleasedlineswasrequiredtofulfilcertainessentialrequirements.Thepresentversionofthepresentdocumenthasbeenproducedtointroducesomenecessarychanges.ITU-TRecommendationI.340(seeannexC)forISDNconnectiontypeswasusedasabasisfortheconnectioncharacteristics.SIST EN 300 247 V1.2.1:2003



ETSIETSIEN300247V1.2.1(2001-07)61ScopeThepresentdocumentspecifiesthetechnicalrequirementsandtestprinciplesforconnectioncharacteristicsofONP2048kbit/sdigitalunstructuredleasedlines.AconnectionispresentedviainterfacesatNetworkTerminationPoints(NTP)andincludesanyequipmentthatmayprovidetheNTP.Signalsbetweenterminalequipmentsaresubjecttoimpairmentsduringtheirtransferovertheconnection.Thelimitstotheseimpairmentsarestatedinthepresentdocument.Togetherwiththecompanionstandard,EN300418[3]definingtheinterfacepresentation,thepresentdocumentdescribestheserviceoffered.Theleasedlineprovidesaccesstothefulldigitalbitrateof2048kbit/swithnorestrictionsonthebinarycontent.Thetestsspecifiedinthepresentdocumentcannotbecarriedout,norcantheperformancebemonitoredbytheleasedlineprovider,whiletheleasedlineisinservice,i.e.carryingusers'traffic.Thusthetestsaredesignedforbringingintoandreturningintoservice,althoughthereisnoobligationtoperformthesetestseachtimealeasedlineisbroughtintoorreturnedintoservice.Thepresentdocumentisapplicabletoleasedlines,includingparttimeleasedlines,forwhichtheestablishmentorreleasedonotrequireanyprotocolexchangeorotherinterventionattheNTP.Thepresentdocumentspecifiesthecompliancetestsfortheconnectionrequirements.Thepresentdocumentdoesnotincludedetailsconcerningtheimplementationofthetests,nordoesitincludeinformationonanyrelevantregulations.ThepresentdocumentdescribesthosecharacteristicsoftheconnectionthatcannotbedeterminedonlybytheequipmentprovidingtheNTPs.TherelatedstandardEN300418[3]definestheinterfacepresentationandplacesnofurtherconstraintsontheconnection.2ReferencesThefollowingdocumentscontainprovisionswhich,throughreferenceinthistext,constituteprovisionsofthepresentdocument.• Referencesareeitherspecific(identifiedbydateofpublicationand/oreditionnumberorversionnumber)ornon-specific.• Foraspecificreference,subsequentrevisionsdonotapply.• Foranon-specificreference,thelatestversionapplies.[1]ITU-TRecommendationO.151(1992):"Errorperformancemeasuringequipmentoperatingattheprimarybitrateandabove".[2]ITU-TRecommendationO.153(1992):"Basicparametersforthemeasurementoferrorperformanceatbitratesbelowtheprimaryrate".[3]ETSIEN300418:"AccessandTerminals(AT);2048kbit/sdigitalunstructuredandstructuredleasedlines(D2048UandD2048S);Networkinterfacepresentation".[4]ETSIEN300248:"AccessandTerminals(AT);2048kbit/sdigitalunstructuredleasedline(D2048U)Terminalequipmentinterface".SIST EN 300 247 V1.2.1:2003



ETSIETSIEN300247V1.2.1(2001-07)73Definitionsandabbreviations3.1DefinitionsForthepurposesofthepresentdocument,thefollowingtermsanddefinitionsapply:leasedlines:telecommunicationsfacilitiesprovidedbyapublictelecommunicationsnetworkthatprovidedefinedtransmissioncharacteristicsbetweennetworkterminationpointsandthatdonotincludeswitchingfunctionsthattheusercancontrol,(e.g.on-demandswitching)NetworkTerminationPoint(NTP):allphysicalconnectionsandtheirtechnicalaccessspecificationswhichformpartofthepublictelecommunicationsnetworkandarenecessaryforaccessto,andefficientcommunicationthrough,thatpublicnetworkunavailabilityperiod:periodoftimebeginningatthefirstof10consecutiveseverelyerroredsecondsandendingimmediatelybeforethefirstfollowingperiodof10consecutivesecondsnoneofwhichareseverelyerrorederroredblock:blockwithoneormorebiterrors(seeITU-TRecommendationG.826(seeannexC))NOTE:Thedurationofablockis1millisecond.erroredsecond:one-secondperiodwithoneormoreerroredblocks(seeITU-TRecommendationG.826(seeannexC))severelydisturbedperiod:occurswhen,overaminimumperiodoftimeequivalenttofourcontiguousblocks,eitherallthecontiguousblocksareaffectedbyahighbinaryerrordensityofatleast10-2,oralossofsignalinformationisobserved(seeITU-TRecommendationG.826(seeannexC))severelyerroredsecond:one-secondperiodwhichcontainsatleast30%erroredblocksoratleastoneseverelydisturbedperiod(seeITU-TRecommendationG.826(seeannexC))slip:sequenceofoneormoreextraormissingconsecutiveunitintervalsinthebitstreamerroredsecondsratio:ratiooferroredsecondsoverallsecondswithinaspecifiedmeasuringperiod,whereneitherarecountedduringunavailabilityperiods(seeITU-TRecommendationG.826(seeannexC))severelyerroredsecondsratio:ratioofseverelyerroredsecondsoverallsecondswithinaspecifiedmeasuringperiod,whereneitherarecountedduringunavailabilityperiods(seeITU-TRecommendationG.826(seeannexC))backgroundblockerrorratio:ratiooferroredblocksoverallblockswithinaspecifiedmeasuringperiod,whereneitherarecountedduringunavailabilityperiodsnorduringseverelyerroredseconds(seeITU-TRecommendationG.826(seeannexC))satellitetransmission:transmissionviaanearthorbitingsatellite3.2AbbreviationsForthepurposesofthepresentdocument,thefollowingabbreviationsapply:D2048U2048kbit/sdigitalunstructuredONPleasedlineONPOpenNetworkProvisionNTPNetworkTerminationPointppmpartspermillionPRBS(29-1)PseudoRandomBitSequence(asdefinedinclause2.1ofITU-TRecommendationO.153[2])PRBS(215-1)PseudoRandomBitSequence(asdefinedinclause2.1ofITU-TRecommendationO.151[1])RXReceive(asignalinputateithertheleasedlineinterfaceorthetestequipment)TXTransmit(asignaloutputateithertheleasedlineinterfaceorthetestequipment)UIUnitIntervalSIST EN 300 247 V1.2.1:2003



ETSIETSIEN300247V1.2.1(2001-07)84RequirementsTheperformanceoftheleasedlineshallcomplywiththeserequirementsonlyiftheconditionsofsupplyofthenetworkequipmentprovidingtheNTParemet,(e.g.iftheequipmentisconnectedtoanappropriatepowersupplyonthecustomer'spremises).TheITU-Tattributetechniqueisusedtoexpresstheconnectionrequirements.ThefollowingattributesfromITU-TRecommendationI.140(seeannexC)arespecifiedinthepresentdocument:-informationtransferrate;-informationtransfersusceptance;-structure;-establishmentofcommunication;-symmetry;-communicationconfiguration;-networkperformance.NOTE:"Bitrate"isequivalentto"informationtransferrate"inthepresentdocument.Thefollowingnetworkperformancesub-attributesareconsideredrelevantforthepresentdocument:-transmissiondelay;-jitter;-slip;-error.4.1AttributesTheconnectionattributesaredisplayedintable1.Ineffect,theseattributesdefinetheservicebeingoffered.Thevaluesandtheassociatedcompliancetestscanbefoundinthesubsequentclauses.Table1:ConnectionattributesConnectiontypeattributesValueDescriptionNatureReferenceclauseInformationtransfertrate2048±50ppmkbit/sSee5.1.1InformationtransfersusceptanceUnrestricteddigitalSee5.1.2StructureUnstructuredSee5.1.3EstablishmentofcommunicationWithoutuserinterventionSee5.1.4SymmetrySymmetricalinbothdirectionsSee5.1.5CommunicationconfigurationPoint-to-pointSee5.1.6Networkperformancesub-attributesConnectiontypeattributesValueDescriptionNatureReferenceclauseTransmissiondelayTerrestrialandsatelliteoptionsSee5.1.7.1JitterInputandoutputportsSee5.1.7.2Slip5per24hourperiodSee5.1.7.3ErrorparametersTimeintervalwitherroredblocksValueDescriptionNatureReferenceclauseErroredseconds2889per24hourperiodSee5.1.7.4.1Severelyerroredseconds117per24hourperiodSee5.1.7.4.2Backgroundblockerrors22395per24hourperiodSee5.1.7.4.3SIST EN 300 247 V1.2.1:2003



ETSIETSIEN300247V1.2.1(2001-07)94.1.1InformationtransferrateRequirement:Theconnectionshallbecapableoftransferringaninformationrateof2048kbit/s±50ppm.Test:ThetestshallbeconductedaccordingtoclauseA.2.1.4.1.2InformationtransfersusceptanceRequirement:Theconnectionshallbecapableoftransferringunrestricteddigitalinformation.Test:ThetestshallbeconductedaccordingtoclauseA.2.1.4.1.3StructureRequirement:Theconnectionshallbeunstructured.Thefullbitrateof2048kbit/sshallbeavailabletotheuserforunrestricteddigitalinformationtransfer.Test:ThetestshallbeconductedaccordingtoclauseA.2.1.4.1.4EstablishmentofcommunicationRequirement:EstablishmentorreleaseoftheconnectionshallnotrequireanyprotocolexchangeorotherinterventionattheNTPbytheuser.Test:Bydeclaration.4.1.5SymmetryRequirement:Theconnectionshallbesymmetrical,i.e.eachdirectionoftransmissionshallhavethesamenominalcharacteristics,althoughtheactualvaluesshallbeindependent.Test:ThetestshallbeconductedaccordingtoclauseA.2.1.4.1.6CommunicationconfigurationRequirement:Theconnectionconfigurationshallbepoint-to-point.Test:Bydeclaration.4.1.7NetworkperformanceThenetworkperformancesub-attributesaredisplayedintable1.Thevaluesandtheassociatedcompliancetestscanbefoundinthesubsequentclauses.4.1.7.1TransmissiondelayRequirement:Therequirementdependsuponwhethersatellitetransmissionisinvolvedintheconnectionornot:a)forconnectionswheresatellitetransmissionisnotinvolvedtheonewayend-to-enddelayshallbelessthan(10+0,01G)ms,whereGisthegeographicaldistanceinkilometres,asshowninfigure1;orb)forconnectionswheresatellitetransmissionisinvolvedtheone-wayend-to-enddelayshallbelessthan350ms.NOTE1:Requirementsa)
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