SIST EN 300 247 V1.2.1:2003
(Main)Access and Terminals (AT); 2 048 kbit/s digital unstructured lease line (D2048U); 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 300 247 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 300 247 V1.2.1:2003 defines the connection characteristics for 2 048 kbit/s digital unstructured leased lines (D2048U) within public telecommunications networks. This European standard, harmonized by the Slovenian Institute for Standardization (SIST), specifies the performance requirements and compliance test procedures for such connections. It aims to ensure reliable, symmetrical, and high-speed digital communications for applications where dedicated, protocol-free transfer is essential.
As a revision of the earlier ETS 300 247, this document incorporates improvements, specifically enhancing safety aspects in line with directives from the Technical Committee (TC) on safety. The standard supports the European Community's mandate on Open Network Provision (ONP) for leased lines, guaranteeing interoperability and consistent quality across diverse operator networks.
Key Topics
Performance Requirements for D2048U Connections:
- Information transfer rate: 2048 kbit/s ± 50 ppm.
- Unrestricted digital information transfer (unstructured, no channelization).
- Symmetrical transmission in both directions.
- Point-to-point configuration without user intervention at the Network Termination Point (NTP).
Network Performance Attributes:
- Transmission delay constraints for terrestrial and satellite links.
- Jitter tolerance at network input and output ports.
- Slip rate limitations.
- Maximum permissible error rates, including errored seconds and background block errors.
Test Procedures for Compliance:
- Methods for measuring transmission rate, symmetry, delay, jitter, slip, and errors.
- Test points specified at network termination interfaces as defined in companion standards.
- Defined measurement periods (typically 24 hours) for error and performance assessment.
Safety Considerations:
- Integration of recommendations from safety-focused committees.
- Assurance of safe connection characteristics for operators and users.
Applications
Enterprise Connectivity: Organizations requiring robust, high-speed, and protocol-independent links between geographically separated offices or data centers benefit from D2048U leased lines for data, voice, or video transmission.
Telecommunication Infrastructure: Operators use this standard to provision and maintain leased lines that form part of national or cross-border core networks, ensuring interoperability and compliance with European ONP directives.
Testing and Quality Assurance: Network providers and customers utilize the defined test procedures to validate connection performance before service activation and during maintenance, guaranteeing service level agreements (SLAs) are met.
Equipment Manufacturing: Vendors develop network termination and test equipment in alignment with the technical and interface requirements described, fostering standardization and compatibility in the telecom ecosystem.
Related Standards
The effective application of SIST EN 300 247 V1.2.1:2003 relies upon adherence to companion and referenced standards, including:
- EN 300 418: Access and Terminals (AT); 2048 kbit/s digital unstructured and structured leased lines; Network interface presentation.
- EN 300 248: Access and Terminals (AT); 2048 kbit/s digital unstructured leased line; Terminal equipment interface.
- ITU-T Recommendations:
- O.151 and O.153 for error performance measurement.
- G.114 for transmission delay specifications.
- G.822 and G.823 for slip and jitter control.
- G.826 for error performance parameters.
- I.140 and I.340 for attribute techniques and connection types.
By implementing SIST EN 300 247 V1.2.1:2003, the telecommunications sector ensures consistent 2 Mbit/s leased line quality, reliability, and safety, fostering broader digital infrastructure harmonization across Europe.
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Frequently Asked Questions
SIST EN 300 247 V1.2.1:2003 is a standard published by the Slovenian Institute for Standardization (SIST). Its full title is "Access and Terminals (AT); 2 048 kbit/s digital unstructured lease line (D2048U); 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 300 247 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 300 247 to improve the safety related aspects following a liaison received from TC safety.
SIST EN 300 247 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 300 247 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); 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
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.:+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 300 247 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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