SIST EN 300 247 V1.2.1:2003

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

Specification of the performance requirement for the connection through the public network, including test procedures for compliance.  Revision of ETS 300 247 to improve the safety related aspects following a liaison received from TC safety.

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: 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 300 247 V1.2.1 (2001-07) - 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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