SIST EN 300 407 V1.2.1:2003
(Main)Fixed Radio Systems; Point-to-point equipment; Parameters for digital radio systems for the transmission of digital signals operating at 55 GHz
General Information
- Abstract
To completely revise current EN 300 407, using EN 300 197 as a reference document for full duplex point-to-point systems. To include all PDH & SDH capacities, 1-4 spectrum efficiency classes, co- and adjacent channel interference sensivity figures and transmitter spectrum masks, where defined, within EN 300 197. The mode of operation shall be limited to full duplex. To delete all references to analogue systems.
- 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 300 407 V1.2.1:2003 is an essential European standard for fixed radio systems, specifying parameters for digital radio point-to-point equipment operating at 55 GHz. Developed by the Slovenski inštitut za standardizacijo (SIST) and aligned with ETSI and EN 300 197, this standard establishes the minimum performance requirements for terrestrial digital radio communication equipment, focusing solely on digital (not analogue) full duplex, frequency division duplex (FDD) operations. The document encompasses technical parameters vital for ensuring compatibility, performance, and regulatory compliance in modern high-frequency wireless transmission systems.
Key Topics
Scope of the Standard
The standard defines parameters for digital radio systems transmitting signals at 55 GHz. It revises and supersedes previous versions by:- Integrating all Plesiochronous Digital Hierarchy (PDH) and Synchronous Digital Hierarchy (SDH) capacities.
- Introducing spectrum efficiency classes (Class 1 to 4).
- Presenting specifications on co-channel and adjacent channel interference sensitivity, as well as transmitter spectrum masks.
- Excluding all references to analogue systems.
Technical Framework
- Frequency Range: Focus on the 55.78 GHz to 57.0 GHz band, compliant with CEPT/ERC Recommendation 12-12E.
- System Types: Point-to-point, full duplex digital links.
- Transmission Capacities Supported: 2 Mbit/s to 155 Mbit/s (including intermediate PDH/SDH rates like STM-0 and STM-1).
- Spectrum Efficiency Classes: Emphasizes flexible support for different levels of spectral efficiency to optimize bandwidth use.
- Interference Management: Sensitivity figures for both co-channel and adjacent-channel interference are included to ensure robust system performance in dense radio environments.
Regulatory and Compatibility Aspects
- Electromagnetic Compatibility: References to EN 300 385 and compliance with EMC directives.
- Antenna and Feeder Requirements: Refers to EN 300 833 for antenna characteristics.
- Power Supply and Environmental Requirements: Adopts ETS 300 132 and ETS 300 019 for physical and climatic resilience.
Applications
SIST EN 300 407 V1.2.1:2003 is highly applicable for the following use cases:
Backhaul and Aggregation Networks:
Widely used as the standard for wireless backhaul in cellular, enterprise, and broadband networks, where reliable, high-capacity, point-to-point links are needed.Local and Regional Connectivity:
Offers digital solutions for local and metropolitan area networks (MAN), especially in locations where fiber deployment is costly or challenging.Critical Infrastructure:
Supports communications in utilities, transportation, and emergency networks requiring high availability and minimal interference.Radio Link Licensing and Equipment Certification:
Provides a recognized benchmark for equipment compliance in regulator approval processes for the 55 GHz band.Migration to All-Digital Networks:
Facilitates transition strategies from legacy analogue radio systems, ensuring interoperability and future-proofing network investments.
Related Standards
For best practice and comprehensive system design, following standards should be considered alongside SIST EN 300 407 V1.2.1:2003:
- EN 300 197: Technical reference for full duplex point-to-point digital radio systems.
- EN 300 833: Specifications for point-to-point antennas in the 3 GHz to 60 GHz range.
- EN 301 126-1: Definitions and general requirements for conformance testing of point-to-point equipment.
- EN 300 385: EMC standard for fixed radio links.
- ITU-R F.1189 / G.826: Recommendations for error performance and network reliability.
- CEPT/ERC Recommendations 12-12E and 74-01: Channel arrangements and spurious emissions.
By following SIST EN 300 407 V1.2.1:2003 and its related standards, organizations ensure high-performance, robust, and regulatory-compliant deployment of digital point-to-point radio systems operating at 55 GHz. This supports the rapid evolution of wireless infrastructure within the European regulatory framework.
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Frequently Asked Questions
SIST EN 300 407 V1.2.1:2003 is a standard published by the Slovenian Institute for Standardization (SIST). Its full title is "Fixed Radio Systems; Point-to-point equipment; Parameters for digital radio systems for the transmission of digital signals operating at 55 GHz". This standard covers: To completely revise current EN 300 407, using EN 300 197 as a reference document for full duplex point-to-point systems. To include all PDH & SDH capacities, 1-4 spectrum efficiency classes, co- and adjacent channel interference sensivity figures and transmitter spectrum masks, where defined, within EN 300 197. The mode of operation shall be limited to full duplex. To delete all references to analogue systems.
To completely revise current EN 300 407, using EN 300 197 as a reference document for full duplex point-to-point systems. To include all PDH & SDH capacities, 1-4 spectrum efficiency classes, co- and adjacent channel interference sensivity figures and transmitter spectrum masks, where defined, within EN 300 197. The mode of operation shall be limited to full duplex. To delete all references to analogue systems.
SIST EN 300 407 V1.2.1:2003 is classified under the following ICS (International Classification for Standards) categories: 33.040.20 - Transmission systems; 33.060.30 - Radio relay and fixed satellite communications systems. The ICS classification helps identify the subject area and facilitates finding related standards.
SIST EN 300 407 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.Fixed Radio Systems; Point-to-point equipment; Parameters for digital radio systems for the transmission of digital signals operating at 55 GHz33.060.30Radiorelejni in fiksni satelitski komunikacijski sistemiRadio relay and fixed satellite communications systems33.040.20Prenosni sistemTransmission systemsICS:Ta slovenski standard je istoveten z:EN 300 407 Version 1.2.1SIST EN 300 407 V1.2.1:2003en01-december-2003SIST EN 300 407 V1.2.1:2003SLOVENSKI
STANDARD
ETSIEN300407V1.2.1(2000-10)EuropeanStandard(Telecommunicationsseries)FixedRadioSystems;Point-to-pointequipment;Parametersfordigitalradiosystemsforthetransmissionofdigitalsignalsoperatingat55GHzSIST EN 300 407 V1.2.1:2003
ETSIETSIEN300407V1.2.1(2000-10)2ReferenceREN/TM-04095KeywordsDRRS,transmission,point-to-point,radioETSI650RoutedesLuciolesF-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.©EuropeanTelecommunicationsStandardsInstitute2000.Allrightsreserved.SIST EN 300 407 V1.2.1:2003
ETSIETSIEN300407V1.2.1(2000-10)3ContentsIntellectualPropertyRights.5Foreword.51Scope.62References.73Symbolsandabbreviations.93.1Symbols.93.2Abbreviations.94Generalcharacteristics.104.1Frequencybandsandchannelarrangements.104.1.1Channelarrangements.104.1.2Co-polarchannelspacingforsystemsoperatingonthesameroute.104.2Compatibilityrequirementsbetweensystems.104.3Performanceandavailabilityrequirements.104.4Environmentalconditions.114.4.1Equipmentwithinweatherprotectedlocations(indoorlocations).114.4.2Equipmentfornon-weatherprotectedlocations(outdoorlocations).114.5Powersupply.114.6Electromagneticcompatibility.114.7Systemblockdiagram.114.8TelecommunicationsManagementNetwork(TMN)interface.124.9Branching/feeder/antennacharacteristics.124.9.1Antennaradiationpatterns.124.9.2Antennacross-PolarDiscrimination(XPD).124.9.3AntennaInter-PortIsolation(IPI).124.9.4Waveguideflanges(orotherconnectors).124.9.5ReturnLoss(RL).125Parametersfordigitalsystems.125.1Transmissioncapacity.125.2Basebandparameters.135.2.1Plesiochronousinterfaces.135.2.2SDHbasebandinterface.135.3Transmittercharacteristics.135.3.1Transmitterpowerrange.135.3.2Transmitpowerandfrequencycontrol.145.3.2.1AutomaticTransmitPowerControl(ATPC).145.3.2.2RemoteTransmitPowerControl(RTPC).145.3.2.3RemoteFrequencyControl(RFC).145.3.3Transmitteroutputpowertolerance.145.3.4TransmitLocalOscillator(LO)frequencyarrangements.145.3.5RFspectrummask.145.3.6Spectrallinesatthesymbolrate.155.3.7Spuriousemissions.165.3.7.1Spuriousemissions-external.165.3.7.2Spuriousemissions-internal.165.3.8Radiofrequencytolerance.165.4Receivercharacteristics.165.4.1Inputlevelrange.165.4.2Receiverlocaloscillatorfrequencyarrangements.165.4.3Spuriousemissions.165.4.3.1Spuriousemissions-external.175.4.3.2Spuriousemissions-internal.175.5Systemperformancewithoutdiversity.175.5.1BERasafunctionofReceiverinputSignalLevel(RSL).17SIST EN 300 407 V1.2.1:2003
ETSIETSIEN300407V1.2.1(2000-10)45.5.2ResidualBER.185.5.3Interferencesensitivity.185.5.3.1Co-channelinterferencesensitivity.185.5.3.2Adjacentchannelinterference.195.5.3.3ContinuousWave(CW)spuriousinterference.195.5.3.4Front-endnon-linearityrequirements(two-toneCWspuriousinterference).205.5.4Distortionsensitivity.205.6Systemcharacteristicswithdiversity.20AnnexA(informative):Additionalinformation.21A.1Radiofrequencychannelarrangement.21A.2RBER.21A.3Co-channelandadjacentchannelinterference.22AnnexB(normative):EssentialrequirementsfortheECCouncilDirective89/336(EMCDirective).24AnnexC(normative):Systemtypecodesforregulatoryprocedures.25History.26SIST EN 300 407 V1.2.1:2003
ETSIETSIEN300407V1.2.1(2000-10)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)hasbeenproducedbyETSITechnicalCommitteeTransmissionandMultiplexing(TM).Thepresentdocumentspecifiestheminimumperformanceparametersforradioequipmentoperatinginthefrequencyrangesasdetailedinsubclause4.1.1.Theformertitleofthepresentdocumentwas"TransmissionandMultiplexing;DigitalRadioRelaySystems;ParametersforDRRSforthetransmissionofdigitalsignalsoperatingat55GHz".NationaltranspositiondatesDateofadoptionofthisEN:18August2000DateoflatestannouncementofthisEN(doa):30November2000DateoflatestpublicationofnewNationalStandardorendorsementofthisEN(dop/e):31May2001DateofwithdrawalofanyconflictingNationalStandard(dow):31May2001SIST EN 300 407 V1.2.1:2003
ETSIETSIEN300407V1.2.1(2000-10)61ScopeThepresentdocumentspecifiestheminimumperformanceparametersforterrestrialdigitalfixedserviceradiocommunicationsequipmentsoperatinginthe55GHzfrequencybandandisacompleterevisionoftheexistingETS300407(March1997)specificationintheareasof:-introductionofuniquesystemtypecodesforregulatoryreferencetothevarioussystemtypesdetailedinthepresentdocument,refertonewannexC(normative)andrelatedcategoriesofequipmentclassesofspectralefficiency;-additionalsystemswithhigherspectrumefficiencyinthenewclasses1to4;-removalofAnalogueservices;-digitalservicesrestrictedtofrequencydivisionduplex(FDD)operationonly;-technicalspecificationsrelevanttotheEMCDirective,detailedinannexB(normative);-specificantennaradiationpatterns(nowsupersededbyEN300833[12]).Harmonizedchannelspacingslowerthan14MHzarenotdefinedinthe55GHzbandatthedraftingdateofthepresentdocumentasthereisstillapendingdecisionontheWRC2000agendaitem1.4.Howeverthepresentdocumentincludes7MHzand3,5MHzchannelspacingsandcanonlybeconsideredasaguidelineuntiladecisionatWRC2000istakenandERCharmonizedchannelarrangementswouldpossiblybeenlargedtoincludethosesmallerchannelspacings.Digitalsystemsareintendedtobeusedforpoint-to-pointconnectionsinlocalandregionalnetworksatdataratesbetween2Mbit/sandSynchronousTransportModule,level1(STM-1).DigitalsystemsconsideredinthepresentdocumentwillbeabletomeettheerrorperformanceobjectivesoftheITU-Rnationalportionofthereferencepath,i.e.ITU-RRecommendationF.1189[19]andtheerrorperformanceobjectivesdetailedinITU-TRecommendationG.826[26].Theparameterstobespecifiedfallintotwocategories:a)thosethatarerequiredtoprovidecompatibilitybetweenchannelsfromdifferentsourcesofequipmentonthesameroute,connectedtoseparateantennas;b)parametersdefiningthetransmissionqualityoftheproposedsystem.ThepresentdocumentdealswithRadioFrequency(RF)andbasebandcharacteristicsrelevanttolow,mediumandhighcapacityPlesiochronousDigitalHierarchy(PDH)transmissionsystems,andSTM-0andSTM-1SynchronousDigitalHierarchy(SDH)transmissionsystems.Antenna/feedersystemrequirementsarecoveredinEN300833[12].ThepresentdocumentdoesnotcontainaspectsrelatedtotestproceduresandtestconditionshowevertheyaretobefoundinEN301126-1[3].Asthemaximumtransmissionrateinagivenbandwidthdependsonsystemspectralefficiency,differentequipmentclassesaredefined:Class1:equipmentspectralefficiencybasedontypically2-statesmodulationscheme(e.g.2-FSK,GaussianMinimumShiftKeying(GMSK)withdiscriminatordetection,orequivalent);Class2:equipmentspectralefficiencybasedontypically4-statesmodulationscheme(e.g.4-FSK,4-QAM,orequivalent);Class3:equipmentspectralefficiencybasedontypically8-statesmodulationscheme(e.g.8PSK,orequivalent);Class4:equipmentspectralefficiencybasedontypically16or32-statesmodulationscheme(e.g.16-QAM,32-QAM,orequivalent).Theaboveclassesareindicativeonlyanddonotimplyanyconstrainttotheactualmodulationformat,providedthatalltherequirementsinthepresentdocumentaremet.SIST EN 300 407 V1.2.1:2003
ETSIETSIEN300407V1.2.1(2000-10)7Safetyaspectsarenotconsideredinthepresentdocument.HowevercompliancetoCENELECEN60950[34]willberequiredtocomplywiththe99/5/EC[35]Directive(R&TTE).TechnicalbackgroundformostoftheparametersandrequirementsreferredinthepresentdocumentmaybefoundinTR101036-1[14]2ReferencesThefollowingdocumentscontainprovisionswhich,throughreferenceinthistext,constituteprovisionsofthepresentdocument.• Referencesareeitherspecific(identifiedbydateofpublication,editionnumber,versionnumber,etc.)ornon-specific.• Foraspecificreference,subsequentrevisionsdonotapply.• Foranon-specificreference,thelatestversionapplies.• Anon-specificreferencetoanETSshallalsobetakentorefertolaterversionspublishedasanENwiththesamenumber.[1]CEPT/ERCRecommendation12-12E(Luxembourg1999):"Radiofrequencychannelarrangementforfixedservicesystemsoperatingintheband55,78GHz–57,0GHz".[2]CEPT/ERCRecommendation74-01:"Spuriousemissions".[3]ETSIEN301126-1(V1.1):"FixedRadioSystems;Conformancetesting;Part1:Point-to-Pointequipment-Definitions,generalrequirementsandtestprocedures".[4]ETSIETS300019:"EquipmentEngineering(EE);Environmentalconditionsandenvironmentaltestsfortelecommunicationsequipment".[5]ETSIETS300132-1:"EquipmentEngineering(EE);Powersupplyinterfaceattheinputtotelecommunicationsequipment;Part1:Operatedbyalternatingcurrent(ac)derivedfromdirectcurrent(dc)sources".[6]ETSIETS300132-2:"EquipmentEngineering(EE);Powersupplyinterfaceattheinputtotelecommunicationsequipment;Part2:Operatedbydirectcurrent(dc)".[7]ETSIEN300385:"ElectromagneticcompatibilityandRadiospectrumMatters(ERM);ElectroMagneticCompatibility(EMC)standardforfixedradiolinksandancillaryequipment".[8]ETSIETS300407(Edition1):TransmissionandMultiplexing(TM);DigitalRadioRelaySystems(DRRS);ParametersforDRRSforthetransmissionofdigitalsignalsandanaloguevideosignalsoperatingaround55GHz".[9]ETSIETS300635:"TransmissionandMultiplexing(TM);SynchronousDigitalHierarchy(SDH);RadiospecificfunctionalblocksfortransmissionofMxSTM-N".[10]ETSIEN300645:"TelecommunicationManagementNetworks(TMN);SynchronousDigitalHierarchy(SDH)radiorelayequipment;InformationmodelforuseonQ-interfaces".[11]ETSIETS300785:"TransmissionandMultiplexing(TM);SynchronousDigitalHierarchy(SDH);RadiospecificfunctionalblocksfortransmissionofMxsub-STM-1".[12]ETSIEN300833:"FixedRadioSystems;PointtoPointAntennas;Antennasforpoint-to-pointfixedradiosystemsoperatinginthefrequencyband3GHzto60GHz".[13]ETSITR101035:"Transmissionandmultiplexing(TM);SynchronousDigitalHierarchy(SDH)aspectsregardingDigitalRadioRelaySystems(DRRS)".[14]ETSITR101036-1(V1.2):"FixedRadioSystems;Point-to-pointequipment;Genericwordingsforstandardsondigitalradiosystemscharacteristics;Part1:Generalaspectsandpoint-to-pointequipmentparameters".SIST EN 300 407 V1.2.1:2003
ETSIETSIEN300407V1.2.1(2000-10)8[15]IECPublication154-2:"Flangesforwaveguides.Part2:Relevantspecificationsforflangesforordinaryrectangularwaveguides".[16]ITU-RRecommendationF.750:"Architecturesandfunctionalaspectsofradio-relaysystemsforSDH-basednetworks".[17]ITU-RRecommendationF.751:"Transmissioncharacteristicsandperformancerequirementsofradio-relaysystemsforSDH-basednetworks".[18]ITU-RRecommendationF.1102:"Characteristicsofradio-relaysystemsoperatinginfrequencybandsaboveabout17GHz".[19]ITU-RRecommendationF.1189:"Errorperformanceobjectivesforconstantbitratedigitalpathsatorabovetheprimaryratecarriedbydigitalradio-relaysystemswhichmayformpartorallofthenationalportionofa27500kmhypotheticalreferencepath".[20]ITU-RRecommendationF.1191:"Bandwidthsandunwantedemissionsofdigitalradio-relaysystems".[21]ITU-TRecommendationG.703:"Physical/electricalcharacteristicsofhierarchicaldigitalinterfaces".[22]ITU-TRecommendationG.707:"Networknodeinterfaceforthesynchronousdigitalhierarchy(SDH)".[23]ITU-TRecommendationG.773:"ProtocolsuitesforQ-interfacesformanagementoftransmissionsystems".[24]ITU-TRecommendationG.783:"Characteristicsofsynchronousdigitalhierarchy(SDH)equipmentfunctionalblocks".[25]ITU-TRecommendationG.784:"Synchronousdigitalhierarchy(SDH)management".[26]ITU-TRecommendationG.826:"Errorperformanceparametersandobjectivesforinternational,constantbitratedigitalpathsatorabovetheprimaryrate".[27]ITU-TRecommendationG.828:"Errorperformanceparametersandobjectivesforinternationalsynchronousdigitalpaths".[28]ITU-TRecommendationG.861:"PrinciplesandguidelinesfortheintegrationofsatelliteandradiosystemsinSDHtransportnetworks".[29]ITU-TRecommendationG.957:"Opticalinterfacesforequipmentsandsystemsrelatingtothesynchronousdigitalhierarchy".[30]ITU-TRecommendationO.151:"Errorperformancemeasuringequipmentoperatingattheprimaryrateandabove".[31]ITU-TRecommendationO.181:"EquipmenttoassesserrorperformanceonSTM-Ninterfaces".[32]ITU-RRecommendationP.530-6:"Propagationdataandpredictionmethodsrequiredforthedesignofterrestrialline-of-sightsystems".[33]"CouncilDirective89/336/EECof3May1989ontheapproximationofthelawsoftheMemberStatesrelatingtoelectromagneticcompatibility".[34]CENELECEN60950:"Safetyofinformationtechnologyequipment".[35]"Directive1999/5/ECoftheEuropeanParliamentandoftheCouncilof9March1999onradioequipmentandtelecommunicationsequipmentandthemutualrecognitionoftheirconformity".[36]ITU-RRecommendationSM.329:"Spuriousemmisions".SIST EN 300 407 V1.2.1:2003
ETSIETSIEN300407V1.2.1(2000-10)93Symbolsandabbreviations3.1SymbolsForthepurposesofthepresentdocument,thefollowingsymbolsapply:dBdecibeldBidecibelrelativetoisotropicradiatordBmdecibelrelativeto1mWdBudecibelrelativeto1microVoltdBWdecibelrelativeto1WGHzGigaHertzkHzkiloHertzMbit/sMega-bitspersecondMHzMegaHertzppmpartspermillionmWmilliWattΩOhm3.2AbbreviationsForthepurposesofthepresentdocument,thefollowingabbreviationsapply:acalternatingcurrentATPCAutomaticTransmitPowerControlAUAdministrativeUnitBBERBackgroundBlockErrorRateBERBitErrorRateC/ICarriertoInterferenceratioCMICodedMarkInversionCWContinuousWavedcdirectcurrentDRRSDigitalRadioRelaySystemsEIRPEquivalentIsotropicallyRadiatedPowerEMCElectroMagneticCompatibilityESRErroredSecondRateFDDFrequencyDivisionDuplexFSKFrequency-ShiftKeying(modulation)GMSKGaussianMinimumShiftKeying(modulation)IECInternationalElectrotechnicalCommitteeIFIntermediateFrequencyIPIInter-PortIsolationLOLocalOscillatorn.a.notapplicablePDHPlesiochronousDigitalHierarchyPRBSPseudoRandomBinarySequenceQAMQuadratureAmplitudeModulationRBERResidualBitErrorRateRFRadioFrequencyRFCRemoteFrequencyControlRLReturnLossRSLReceiveSignalLevelRTPCRemoteTransmitPowerControlSDHSynchronousDigitalHierarchySOHSectionOverHeadSTM-NSynchronousTransportModule,levelNSTM-0mediumcapacitySDHradiotransportmodule(51,840Mbit/sAU-3equivalent,alsoreferredasSTM-0byITU-TRecommendationG.861[28])TCETSITechnicalCommitteeTMETSITC-Trans
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