SIST EN 300 766 V1.2.1:2004
(Main)Access and Terminals (AT); Multiple 64 kbit/s digital unrestricted leased lines with octet integrity presented at a structured 2 048 kbit/s interface at either or both ends (D64M); Connection characteristics and network interface presentation
General Information
- Abstract
Revision to improve the safety related text following a liaison statement form TC Safety. Specification of the public network interface and test methods for compliance.
- Status
- Published
- Publication Date
- 30-Sep-2004
- Technical Committee
- SPN - Services and Protocols for Networks
- Current Stage
- 6060 - National Implementation/Publication (Adopted Project)
- Start Date
- 01-Oct-2004
- Due Date
- 01-Oct-2004
- Completion Date
- 01-Oct-2004
- Mandate
- T-307
Overview
SIST EN 300 766 V1.2.1:2004 is a European telecommunications standard focused on specifying the connection characteristics and network interface presentation for multiple 64 kbit/s digital unrestricted leased lines, ensuring octet integrity, when presented at a structured 2048 kbit/s interface at either or both ends. Developed by the Slovenski inštitut za standardizacijo (SIST), this standard aligns with the requirements of the European Telecommunications Standards Institute (ETSI) and addresses the public network interface as well as the required methods for testing compliance.
This revision incorporates enhancements to safety-related text as driven by feedback from technical safety committees. The standard ensures consistent, predictable, and interoperable access and terminal interfaces for leased lines, supporting reliable data transfer in diverse telecommunications environments.
Key Topics
Connection and Interface Characteristics
Defines the mechanical and electrical properties for 64 kbit/s digital unrestricted leased lines using a structured 2048 kbit/s digital interface, covering both ends or just one end.Octet Integrity and Bitstream Structure
Ensures unrestricted digital data is transferred with maintained octet and bit sequence integrity, regardless of the interface configuration.Point-to-Point Managed Leased Lines
Only supports point-to-point configurations, with each 64 kbit/s line individually mapped-there is no point-to-multipoint or broadcasting.Compliance Test Principles
Specifies test methods needed to verify compliance, although not all interfaces require testing before service activation.Safety and EMC Scope
Highlights that specific safety, overvoltage, and electromagnetic compatibility (EMC) requirements are outside the scope and handled in related safety standards.
Applications
SIST EN 300 766 V1.2.1:2004 is a vital reference for:
- Telecommunications service providers deploying digital leased line services where multiple 64 kbit/s channels are aggregated at a 2 048 kbit/s interface, commonly seen in business connectivity or infrastructure backbone links.
- Equipment manufacturers designing access and terminal devices to ensure compliance and interoperability with public telecommunications networks.
- Network designers and integrators who must ensure network terminations and interconnections conform to structured interface requirements for reliability and seamless service delivery.
- Testing and quality assurance teams who utilize the standard’s referenced test methodologies to validate interface performance and connection integrity.
Examples include configuring business sites with multiple digital lines, connecting PBX systems, data center interconnects, or supporting legacy equipment in transition to higher-capacity digital infrastructures.
Related Standards
To ensure interoperability and comprehensive compliance, use this standard in conjunction with:
- EN 300 288: Access and Terminals (AT); 64 kbit/s digital unrestricted leased line with octet integrity - Network interface presentation
- EN 300 289: Access and Terminals (AT); 64 kbit/s digital unrestricted leased line with octet integrity - Connection characteristics
- EN 300 418: Access and Terminals (AT); 2048 kbit/s digital unstructured and structured leased lines - Network interface presentation
- EN 300 419: Access and Terminals (AT); 2048 kbit/s digital structured leased lines - Connection characteristics
- EN 300 290 and EN 300 420: Terminal equipment interface standards for 64 kbit/s and 2048 kbit/s lines
International references such as ITU-T Recommendations G.703, G.704, and G.706 provide foundational guidance on interface requirements and structure, supporting global harmonization. For safety and EMC, related product standards from CENELEC and IEC apply.
Keywords: digital leased lines, 2048 kbit/s structured interface, 64 kbit/s octet integrity, network interface presentation, telecommunications standard, compliance testing, access and terminal equipment, ISDN, public network connectivity.
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Frequently Asked Questions
SIST EN 300 766 V1.2.1:2004 is a standard published by the Slovenian Institute for Standardization (SIST). Its full title is "Access and Terminals (AT); Multiple 64 kbit/s digital unrestricted leased lines with octet integrity presented at a structured 2 048 kbit/s interface at either or both ends (D64M); Connection characteristics and network interface presentation". This standard covers: Revision to improve the safety related text following a liaison statement form TC Safety. Specification of the public network interface and test methods for compliance.
Revision to improve the safety related text following a liaison statement form TC Safety. Specification of the public network interface and test methods for compliance.
SIST EN 300 766 V1.2.1:2004 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 300 766 V1.2.1:2004 is associated with the following European legislation: Standardization Mandates: T-307. When a standard is cited in the Official Journal of the European Union, products manufactured in conformity with it benefit from a presumption of conformity with the essential requirements of the corresponding EU directive or regulation.
SIST EN 300 766 V1.2.1:2004 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.NAccess and Terminals (AT); Multiple 64 kbit/s digital unrestricted leased lines with octet integrity presented at a structured 2 048 kbit/s interface at either or both ends (D64M); Connection characteristics and network interface presentation33.040.50Vodi, zveze in tokokrogiLines, connections and circuitsICS:Ta slovenski standard je istoveten z:EN 300 766 Version 1.2.1SIST EN 300 766 V1.2.1:2004en01-oktober-2004SIST EN 300 766 V1.2.1:2004SLOVENSKI
STANDARD
ETSIEN300766V1.2.1(2001-07)EuropeanStandard(Telecommunicationsseries)AccessandTerminals(AT);Multiple64kbit/sdigitalunrestrictedleasedlineswithoctetintegritypresentedatastructured2048kbit/sinterfaceateitherorbothends(D64M);ConnectioncharacteristicsandnetworkinterfacepresentationSIST EN 300 766 V1.2.1:2004
ETSIETSIEN300766V1.2.1(2001-07)2ReferenceREN/AT-020011Keywordsdigital,interface,leasedline,ONP,testingETSI650RoutedesLuciolesF-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 300 766 V1.2.1:2004
ETSIETSIEN300766V1.2.1(2001-07)3ContentsIntellectualPropertyRights.5Foreword.5Introduction.61Scope.72References.73Definitionsandabbreviations.83.1Definitions.83.2Abbreviations.94Overview(informative).95Connectioncharacteristics.105.1Summaryofattributes.115.2Informationtransferrate.115.3Informationtransfersusceptance.115.4Structureandoctetintegrity.115.5Establishmentofconnection.125.6Symmetry.125.7Transmissiondelay.125.8Controlledslip.135.9Erroredseconds.135.10Severelyerroredseconds.135.11Availability.136Interfacecharacteristics-2048kbit/sinterface.146.1Connectionarrangements.146.2Framestructure.146.2.1General.146.2.22048kbit/sdigitalstructuredONPleasedline(CRC-4).146.2.3UseoftheE-bits.146.2.4Framesynchronizationanddatatransmissioncapability.146.2.5Multiframealignment.146.3Outputsignalcoding.156.4Outputwaveformshape.156.5Outputtiming.156.6Outputtimingunderfailureconditions.156.7Outputimpedancetowardsground.156.8Outputjitter.156.9Inputsignalcoding.156.10Inputreturnloss.156.11Inputlosstolerance.166.12Inputimmunityagainstreflections.166.13Tolerablelongitudinalvoltages.166.14Impedancetowardsground.166.15Inputjittertolerance.167Interfacecharacteristics-64kbit/sinterface.167.1Connectionarrangements.167.2Outputsignalcodingandoctetstructure.167.3Outputwaveformshape.167.4Outputtiming.177.5Outputtimingunderfailureconditions.177.6Outputjitter.177.7Impedancetowardsground.177.8Longitudinalconversionloss.17SIST EN 300 766 V1.2.1:2004
ETSIETSIEN300766V1.2.1(2001-07)47.9Inputsignalcodingandoctetstructure.177.10Inputjittertolerance.177.11Inputreturnloss.177.12Inputlosstolerance.187.13Immunityagainstreflections.187.14Impedancetowardsground.187.15Longitudinalconversionloss.188Safety.189ElectroMagneticCompatibility(EMC).1810Overvoltage.18AnnexA(normative):Testmethods.19A.1General.19A.1.1Additionalinformationtosupportthetest.19A.1.2Equipmentconnection.19A.2Maintest.20AnnexB(informative):Bibliography.21History.22SIST EN 300 766 V1.2.1:2004
ETSIETSIEN300766V1.2.1(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)toprovidestandardsforthesupportoftheDirectiveonOpenNetworkProvision(ONP)ofleasedlines(92/44/EEC).Therearesixotherstandardsdirectlyrelatedtothepresentdocument:-EN300288:"AccessandTerminals(AT);64kbit/sdigitalunrestrictedleasedlinewithoctetintegrity(D64U);Networkinterfacepresentation";-EN300289:"AccessandTerminals(AT);64kbit/sdigitalunrestrictedleasedlinewithoctetintegrity(D64U);Connectioncharacteristics";-EN300290:"AccessandTerminals(AT);64kbit/sdigitalunrestrictedleasedlinewithoctetintegrity(D64U);Terminalequipmentinterface";-EN300418:"AccessandTerminals(AT);2048kbit/sdigitalunstructuredandstructuredleasedlines(D2048UandD2048S);Networkinterfacepresentation";-EN300419:"AccessandTerminals(AT);2048kbit/sdigitalstructuredleasedlines(D2048S);Connectioncharacteristics";-EN300420:"AccessandTerminals(AT);2048kbit/sdigitalstructuredleasedlines(D2048S);Terminalequipmentinterface".ThepresentdocumentisbasedoninformationfromITU-TRecommendationsandETSIpublicationsandtherelevantdocumentsarequotedwhereappropriate.Thepresentdocumenthasbeenwrittenasa"delta"documenttotheexistingstandardsfor64kbit/sand2048kbit/sleasedlines.Itusesrequirementsfromthesestandardsbycross-referencewithmodificationsasnecessarytothetest.Theconfigurationscoveredbythepresentdocumentcouldhavebeenaddressedbymodifyingtheexistingstandardsfor64kbit/sand2048kbit/sleasedlinestomakethemmoremodularsothatthe64kbit/sconnectioncharacteristicscouldbeusedinconjunctionwiththe2048kbit/sstructuredinterface.Insomewaysthiswouldhavebeenatidiersolution,butitwouldinvolveconsiderableadditionalactivitybecausetheexistingstandardsfor64kbit/sand2048kbit/sleasedlineswere,atthetimeofcreationofthepresentdocument(seealsotheintroductionofthepresentdocument),thesubjectofregulationandreferencestothemintheannexoftheONPleasedlineDirectivewouldhavetobechanged.SIST EN 300 766 V1.2.1:2004
ETSIETSIEN300766V1.2.1(2001-07)6NationaltranspositiondatesDateofadoptionofthisEN:29June2001DateoflatestannouncementofthisEN(doa):30September2001DateoflatestpublicationofnewNationalStandardorendorsementofthisEN(dop/e):31March2002DateofwithdrawalofanyconflictingNationalStandard(dow):31March2002IntroductionTheCouncilDirectiveontheapplicationofONPtoleasedlines(92/44/EEC)concernstheharmonizationofconditionsforopenandefficientaccessto,anduseof,theleasedlinesprovidedoverpublictelecommunicationsnetworksandtheavailabilitythroughouttheEuropeanUnion(EU)ofaminimumsetofleasedlineswithharmonizedtechnicalcharacteristics.OthercountriesoutsidetheEUmayalsochoosetoprovideleasedlinesaccordingtothestandardsproducedtosupporttheDirective.TheconsequenceoftheDirectiveisthattelecommunicationsorganizationswithintheEUshallmakeavailableasetofleasedlinesbetweenpointsinthesecountrieswithspecifiedconnectioncharacteristicsandspecifiedinterfaces.UndertheDirective91/263/EEC(seeannexB),laterreplacedby98/13/EC(seeannexB),TerminalEquipment(TE)forconnectiontotheseleasedlineswasrequiredtofulfilcertainessentialrequirements.Thepresentversionofthepresentdocumenthasbeenproducedtointroducesomenecessarychanges.TheleasedlinespecifiedinthepresentdocumentisnotincludedintheminimumsetwhoseprovisionisrequiredunderDirective92/44/EEC(seeannexB),howeverthepresentdocumentiswrittenasa"delta"documentbasedonthespecificationsforthe2048kbit/sdigitalstructuredONPleasedline(D2048S)and64kbit/sdigitalunrestrictedONPleasedlinewithoctetintegrity(D64U)leasedlines.ETS300166andITU-TRecommendationG.703(seeannexB)wereusedasthebasisfortheinterfacepresentationrequirements.ETS300167,ITU-TRecommendationsG.704andG.706(seeannexB)wereusedasthebasisforthestructureofthe2048kbit/sinterface.Thepresentdocumentdoesnotapplytoterminalequipment.EN300290[4]applieswithoutmodificationtoTEintendedforconnectiontothe64kbit/sinterfaceoftheleasedline.IntheoryEN300420[6]shouldbemodifiedtodefinethetimeslotstructureforterminalsintendedforconnectionto2048kbit/sinterfacesthatpresent64kbit/sleasedlines.However,themodificationistootrivialtobeworthimplementing.SIST EN 300 766 V1.2.1:2004
ETSIETSIEN300766V1.2.1(2001-07)71ScopeThepresentdocumentspecifiesthetechnicalrequirementsandtestprinciplesfortheconnectioncharacteristicsandnetworkinterfacepresentationsofa64kbit/spoint-to-pointdigitalunrestrictedleasedlinewithoctetintegritythatisprovidedbetweeneither:-two2048kbit/sstructurednetworkinterfaces;or-a2048kbit/sstructurednetworkinterfaceanda64kbit/sco-directionalnetworkinterface.Morethanoneleasedlineofthetypedescribedinthepresentdocumentmaybeprovidedatany2048kbit/snetworkinterface.Suchleasedlinesmayconnecttothesameordifferentdestinations.Thepresentdocumentiswrittenasa"delta"documentbasedonthefollowingstandards:-EN300288:"AccessandTerminals(AT);64kbit/sdigitalunrestrictedleasedlinewithoctetintegrity(D64U);Networkinterfacepresentation".-EN300289:"AccessandTerminals(AT);64kbit/sdigitalunrestrictedleasedlinewithoctetintegrity(D64U);Connectioncharacteristics".-EN300418:"AccessandTerminals(AT);2048kbit/sdigitalunstructuredandstructuredleasedlines(D2048UandD2048S);Networkinterfacepresentation".-EN300419:"AccessandTerminals(AT);2048kbit/sdigitalstructuredleasedlines(D2048S);Connectioncharacteristics".Thepresentdocumentisapplicabletoleasedlines,includingparttimeleasedlines,whoseestablishmentorreleasedoesnotrequireanyprotocolexchangeorotherinterventionattheNetworkTerminationPoint(NTP).Thepresentdocumentcoverstheconnectioncharacteristics,andthemechanicalandelectricalcharacteristics(exceptsafety,overvoltageandEMCaspects)ofthenetworkinterface,andspecifiesconformancetests.Someofthetestsfortheinterfacepresentationdescribedinthepresentdocumentarenotdesignedtobeappliedtotheinterfaceofaninstalledleasedline;suchtestsmaybeappliedtoequipmentofthekindusedtoprovidetheinterface.Thepresentdocumentdoesnotincludedetailsconcerningtheimplementationofthetestsnordoesitincludeinformationonanyregulationsconcerningtesting.NOTE:Thereisnorequirementforeachleasedlinetobetestedinaccordancewiththepresentdocumentbeforeitisbroughtinto,orreturnedinto,service.2ReferencesThefollowingdocumentscontainprovisionswhich,throughreferenceinthistext,constituteprovisionsofthepresentdocument.• Referencesareeitherspecific(identifiedbydateofpublication,editionnumber,versionnumber,etc.)ornon-specific.• Foraspecificreference,subsequentrevisionsdonotapply.• Foranon-specificreference,thelatestversionapplies.[1]ETSIEN300288:"AccessandTerminals(AT);64kbit/sdigitalunrestrictedleasedlinewithoctetintegrity(D64U);Networkinterfacepresentation".[2]ETSIEN300289:"AccessandTerminals(AT);64kbit/sdigitalunrestrictedleasedlinewithoctetintegrity(D64U);Connectioncharacteristics".[3]ETSIEN300418:"AccessandTerminals(AT);2048kbit/sdigitalunstructuredandstructuredleasedlines(D2048UandD2048S);Networkinterfacepresentation".SIST EN 300 766 V1.2.1:2004
ETSIETSIEN300766V1.2.1(2001-07)8[4]ETSIEN300290:"AccessandTerminals(AT);64kbit/sdigitalunrestrictedleasedlinewithoctetintegrity(D64U)Terminalequipmentinterface".[5]ETSIEN300419:"AccessandTerminals(AT);2048kbit/sdigitalstructuredleasedlines(D2048S);Connectioncharacteristics".[6]ETSIEN300420:"AccessandTerminals(AT);2048kbit/sdigitalstructuredleasedlines(D2048S);Terminalequipmentinterface".[7]ITU-TRecommendationI.410(1988):"GeneralaspectsandprinciplesrelatingtoRecommendationsonISDNuser-networkinterfaces".[8]ITU-TRecommendationO.151(1992):"Errorperformancemeasuringequipmentoperatingattheprimaryrateandabove".[9]ITU-TRecommendationO.152(1992):"Errorperformancemeasuringequipmentforbitratesof64kbit/sandN×64kbit/s".3Definitionsandabbreviations3.1DefinitionsForthepurposesofthepresentdocument,thefollowingtermsanddefinitionsapply:erroredsecond:asecondwithoneormorebiterrorsframe:sequenceof256bitsofwhichthefirst8bitsdefinetheframestructureleasedlines:telecommunicationsfacilitiesprovidedbyapublictelecommunicationsnetworkthatprovidedefinedtransmissioncharacteristicsbetweennetworkterminationpointsandthatdonotincludeswitchingfunctionsthattheusercancontrol(e.g.on-demandswitching)NetworkTerminationPoint(NTP):allphysicalconnectionsandtheirtechnicalaccessspecificationswhichformpartofthepublictelecommunicationsnetworkandarenecessaryforaccesstoandefficientcommunicationthroughthatpublicnetworkoctetslip:slipofonecompleteoctetPRBS(215-1):PseudoRandomBitSequence(PRBS)asdefinedinclause2.1ofITU-TRecommendationO.151PRBS(211-1):PseudoRandomBitSequence(PRBS)asdefinedinclause2.1ofITU-TRecommendationO.152severelyerroredsecond:asecondwhereatleast0,1%ofthebitsareerroredslip:oneormoreextraormissingconsecutiveunitintervalsinthebitstreamtimeslot:inthecontextofthepresentdocument,atimeslotisaperiodofnominally3,90625µs(8bits).Eachframeofnominally125µsissubdividedinto32timeslotsnumbered0-31terminalequipment:equipmentintendedtobeconnectedtothepublictelecommunicationsnetwork,i.e.:-tobeconnecteddirectlytotheterminationofapublictelecommunicationnetwork;or-tointerworkwithapublictelecommunicationsnetworkbeingconnecteddirectlyorindirectlytotheterminationofapublictelecommunicationsnetwork,inordertosend,process,orreceiveinformation.SIST EN 300 766 V1.2.1:2004
ETSIETSIEN300766V1.2.1(2001-07)93.2AbbreviationsForthepurposesofthepresentdocument,thefollowingabbreviationsapply:CRC-4CyclicRedundancyCheck(usingfourbits)D2048S2048kbit/sdigitalstructuredONPleasedlineD64MMultiple64kbit/sdi
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