BS EN 50134-5-2021 报警系统 社会报警系统 第5部分：互连和通信

BSEN50134-5:2021

BSIStandardsPublication

Alarmsystems—Socialalarmsystems

Part5:Interconnectionsandcommunications

bsi.

BSEN50134-5:2021BRITISHSTANDARD

Nationalforeword

ThisBritishStandardistheUKimplementationofEN50134-5:2021.

ItsupersedesBSEN50134-5:2004,whichwillbewithdrawnon

2February2022.

TheUKparticipationinitspreparationwasentrustedtoTechnicalCommitteeGW/1,Electronicsecuritysystemsandproducts.

Alistoforganizationsrepresentedonthiscommitteecanbeobtainedonrequesttoitscommitteemanager.

Contractualandlegalconsiderations

Thispublicationhasbeenpreparedingoodfaith,howeverno

representation,warranty,assuranceorundertaking(expressor

implied)isorwillbemade,andnoresponsibilityorliabilityisorwillbeacceptedbyBSIinrelationtotheadequacy,accuracy,completenessor

reasonablenessofthispublication.Allandanysuchresponsibilityandliabilityisexpresslydisclaimedtothefullextentpermittedbythelaw.

Thispublicationisprovidedasis,andistobeusedatthe

recipient'sownrisk.

Therecipientisadvisedtoconsiderseekingprofessionalguidancewithrespecttoitsuseofthispublication.

Thispublicationisnotintendedtoconstituteacontract.Usersareresponsibleforitscorrectapplication.

◎TheBritishStandardsInstitution2021

PublishedbyBSIStandardsLimited2021

ISBN9780539041842

ICS13.320

CompliancewithaBritishStandardcannotconferimmunityfromlegalobligations.

ThisBritishStandardwaspublishedundertheauthorityofthe

StandardsPolicyandStrategyCommitteeon31July2021.

Amendments/corrigendaissuedsincepublication

DateTextaffected

BSEN50134-5:2021

EUROPEANSTANDARDNORMEEUROPEENNEEUROPÄISCHENORM

EN50134-5

July2021

ICS13.320SupersedesEN50134-5:2004andallofitsamendments

andcorrigenda(ifany)

EnglishVersion

Alarmsystems-Socialalarmsystems-Part5:Interconnectionsandcommunications

Systèmesd'alarme-Systèmesd'alarmesociale-Patie5:

Communicationetinterconnexion

Alarmanlagen-Personen-Hilferufanlagen-Teil5:VerbindungenundKommunikation

ThisEuropeanStandardwasapprovedbyCENELECon2021-06-07.CENELECmembersareboundtocomplywiththeCEN/CENELECInternalRegulationswhichstipulatetheconditionsforgivingthisEuropeanStandardthestatusofanationalstandardwithoutanyalteration.Up-to-datelistsandbibliographicalreferencesconcerningsuchnationalstandardsmaybeobtainedonapplicationtotheCEN-CENELECManagementCentreortoanyCENELECmember.

ThisEuropeanStandardexistsinthreeofficialversions(English,French,German).Aversioninanyotherlanguagemadebytranslation

undertheresponsibilityofaCENELECmemberintoitsownlanguageandnotifiedtotheCEN-CENELECManagementCentrehasthe

samestatusastheofficialversions.

CENELECmembersarethenationalelectrotechnicalcommitteesofAustria,Belgium,Bulgaria,Croatia,Cyprus,theCzechRepublic,

Denmark,Estonia,Finland,France,Germany,Greece,Hungary,lceland,Ireland,taly,Latvia,Lithuania,Luxembourg,Malta,the

Netherlands,Norway,Poland,Portugal,RepublicofNorthMacedonia,Romania,Serbia,Slovakia,Slovenia,Spain,Sweden,Switzerland,TurkeyandtheUnitedKingdom.

EuropeanCommitteeforElectrotechnicalStandardization

ComitéEuropéendeNormalisationElectrotechniqueEuropäischesKomiteefürElektrotechnischeNormung

CEN-CENELECManagementCentre:RuedelaScience23,B-1040Brussels

◎2021CENELECAllrightsofexploitationinanyformandbyanymeansreservedworldwideforCENELECMembers.

Ref.No.EN50134-5:2021E

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ContentsPage

Europeanforeword 4

Introduction 6

1Scope 7

2Normativereferences 7

3Terms,definitionsandabbreviations 8

3.1Termsanddefinitions 8

3.2Abbreviations 10

4Interconnections 10

4.1Generalrequirements 10

4.2Wireless 11

4.3Availability 11

4.4Monitoring 11

4.5Security 11

4.6Transmissiontime 12

4.7Videoandotherapplications 12

4.8Two-wayspeechcommunication 12

5Communications 12

5.1Commentary 12

5.2Generalrequirements 12

5.3Alarmtransmissionequipment 13

5.3.1General 13

5.3.2Transmissionlinkssharedwithotherapplications 14

5.3.3MonitoringoftheinterconnectionwiththeAE 15

5.4Technicalperformancerequirementsofthealarmtransmissionsystem 15

5.4.1General 15

5.4.2Sessional-connectedorswitchedpaths 15

5.4.3Packetswitchednetworks 16

5.5Thecontroller 17

5.5.1Environmentalrequirements 17

5.5.2Accesslevels 17

5.5.3Sessional-connectedorswitchedpaths 17

5.5.4Permanentvirtualpacketswitchedpaths 17

5.5.5Voicecommunicators 17

6DigitaltoAnalogueconversionwithinthealarmtransmissionpath 18

6.1Commentary 18

6.2General 18

6.2.1General 18

6.2.2Transmissionnetworkequipment 18

6.2.3Digitaltoanalogueconversionunits 19

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7Logicalalarmtriggering 19

7.1Commentary 19

7.2General 19

7.3LogicalalarmtriggeringfromastandalonelocaldeviceconnectedtotheLocalUnit

orController 19

7.3.1General 19

7.3.2LogicalalarmtriggeringgeneratedwithintheLocalUnitorController 20

7.3.3LogicalalarmtriggeringfromaDeviceProvisioningandManagement

Platform 20

7.3.4LogicalalarmtriggeringfromwithintheAlarmManagementSystem 21

8Generalsecurityrequirements 21

8.1General 21

8.2Designconsiderations 22

8.3ATS 22

8.4Useofstandardcryptographicalgorithmsandsecurityprotocols 22

8.5Authenticationrequirements 22

8.6Tests 23

8.6.1General 23

8.6.2ATSNPerformance 23

8.6.3TransmissionTime 23

8.6.4VerificationInterval 23

8.6.5Availability 23

8.6.6Calculationofavailability 23

8.7Documentation 23

8.8Verificationofperformanceoftheinterconnections 23

Bibliography 24

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EN50134-5:2021(E)

Europeanforeword

Thisdocument(EN50134-5:2021)hasbeenpreparedbyCLC/TC79,"Alarmsystems".

Thefollowingdatesarefixed:

·latestdatebywhichthisdocumenthastobe(dop)2022-06-07

implementedatnationallevelbypublicationof

anidenticalnationalstandardorby

endorsement

·latestdatebywhichthenationalstandards(dow)2024-06-07

conflictingwiththisdocumenthavetobe

withdrawn

ThisdocumentsupersedesEN50134-5:2004andallofitsamendmentsandcorrigenda(ifany).

EN50134-5:2021includesthefollowingsignificanttechnicalchangeswithrespecttoEN50134-5:2004:

-Theminimumperformanceparametersfortheinterconnectionincludingavailability,monitoring,security,transmissiontimearenowdeterminedbyupdatedreferencetoEN50136-1:20121.

-Requirementsformicrophoneandspeakerperformancetodelivertwo-wayspeechhavebeenremovedandarenowdeterminedwithEN50134-3:2012.

-Requirementsforthealarmtransmissionsystemhavebeenupdatedtotakeaccountofthegeneralmigrationofvoicetraffictopacket-basedIPinfrastructuresbytelecommunicationsproviders.

-TheminimumtechnicalperformancerequirementsofthealarmtransmissionsystemarenowprescribedbyupdatedreferencetoEN50136-1:20121.

-TherequirementsforanATSusedwithinsocialalarmsystemsaresetoutascustomcategoriesutiizingperformancemetricsdrawnfrommorethanonestandardizedATSconfigurationclassdescribedwithEN50136-1:20121

-Performanceparametersarenowprescribedforbothsessionalconnected,switchedpathsorpackedswitchednetworks.

-Differenttechnicalperformancerequirementsforthealarmtransmissionsystemnowincludedforacontrollerdesignedforusewithonelocalunitormultiplelocalunits.

-Requirementshavebeenaddedwheredigitaltoanalogueoranaloguetodigitalsignalconversionisutilized.

-Requirementshavebeenaddedwhereadigitaltoanalogueconversionunitundertakestranslationbetweenananaloguesignallingprotocolandadigitalsignallingprotocol.

-Accounthasbeentakenoftheincreasinguseoflogicalalarmtriggeringwheredatafromseveralsourcesarecombinedtodeterminewhetheraspecifiedalarmtriggeringconditionhasbeenmet.Minimumrequirementsarenowincludedlogicalalarmtriggeringfromanyofthefollowing:triggerdevice,localunitandcontroller,deviceprovisioningandmanagementplatformandthealarmmanagementsystem.

-Securityrequirementsincludingdesignconsiderations,useofcryptographicalgorithmsandsecurityprotocolsnowincludedtoprotectcomponentsofasocialalarmsystemfrommaliciousattacks,inadvertentinfluencesandtoensureprivacyandintegrityofthetransmittedinformation.

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Attentionisdrawntothepossibilitythatsomeoftheelementsofthisdocumentmaybethesubjectofpatentrights.CENELECshallnotbeheldresponsibleforidentifyinganyorallsuchpatentrights.

Anyfeedbackandquestionsonthisdocumentshouldbedirectedtotheusers'nationalcommittee.AcompletelistingofthesebodiescanbefoundontheCENELECwebsite.

BSEN50134-5:2021

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EN50134-5:2021(E)

Introduction

Asocialalarmsystemprovides24hfacilitiesforalarmtriggering,identification,signaltransmission,alarmreception,loggingand2-wayspeechcommunication,toprovidereassuranceandassistanceforpeopleconsideredtobeatrisk.

Thesocialalarmsystemprovidesstreamingmediabetweenthelocalunit,thecontrollerandthealarmreceivingcentre.Asaminimumitisintheformofvoicecommunicationbutinadditionitmayinclude,statusdata,videoandvoiceorothercontinuousstreamingdata.Alarm,fault,andstatusmessagesmaybereceivedandprocessedatasingle,multipleordifferentARC's.

Thesocialalarmsystemcanincludeoneormanytriggerdevicesconnectedtothelocalunitand/orcontrollerviainterconnections,thesecurityandintegrityofwhichareessentialtoproperoperationofthealarmsystem.AscommunicationsproviderscontinuetomigratetowardsNextGenerationNetworkstheyareincreasinglyconvergingvoicetrafficontotheirpacketbasedIPinfrastructures,whichmightnolongerhavearegulatoryrequirementtosupportin-callDTMFtones.Thiscouldhaveanadverseimpactonthereliabilityofin-calltone-basedprotocolsusedinsocialalarmsystems,whichcoulddrivefuturesystemsdevelopmenttotheuseofcommunicationprotocolsengineeredforpacketbasedtransmissionenvironments.

Socialalarmsystemsarepartofafamilyofalarmsystemssharingcommonstandardsforaspectssuchastheperformancecharacteristicsofthealarmtransmissionsystem.ThesecommonperformancemetricsaredefinedwithintheEN50136seriesandthisdocumentselectstheappropriateperformanceparametersforsocialalarmsystemsbyreferencetotheEN50136series.

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1Scope

Thisdocumentspecifiestheminimumrequirementsfortheperformance,reliabilityandsecuritycharacteristicsofinterconnections,alarmtransmissionsystemsandcommunicationswithinasocialalarmsystem.

2Normativereferences

Thefollowingdocumentsarereferredtointhetextinsuchawaythatsomeoralloftheircontentconstitutesrequirementsofthisdocument.Fordatedreferences,onlytheeditioncitedapplies.Forundatedreferences,thelatesteditionofthereferenceddocument(includinganyamendments)applies.

EN50134series,Alarmsystems-Socialalarmsystems

EN50134-2:2017,Alarmsystems-Socialalarmsystems-Part2:Triggerdevices

EN50134-3:2012,Alarmsystems-Socialalarmsystems-Part3:Localunitandcontroller

CLC/TS50134-9,Alarmsystems-Socialalarmsystems-Part9:IPCommunicationsProtocol

EN50136-1:20121,Alarmsystems-Alarmtransmissionsystemsandequipment-Part1:Generalrequirementsforalarmtransmissionsystems

EN50136-2:2013,Alarmsystems-Alarmtransmissionsystemsandequipment-Part2:RequirementsforSupervisedPremisesTransceiver(SPT)

EN50136-2-4:1998,Alarmsystems.Alarmtransmissionsystemsandequipment.Requirementsforequipmentusedinsystemswithvoicecommunicatorsusingthepublicswitchedtelephonenetwork

EN50136-3,Alarmsystems-Alarmtransmissionsystemsandequipment-Part3:RequirementsforReceivingCentreTransceiver(RCT)

EN50518:2019,MonitoringandAlarmReceivingCentre

EN50600series,Informationtechnology-Datacentrefacilitiesandinfrastructures

ETSIEN300220-2,ShortRangeDevices(SRD)operatinginthefrequencyrange25MHzto1000MHz;Part2:HarmonisedStandardforaccesstoradiospectrumfornonspecificradioequipment

ETSIEN300328,Widebandtransmissionsystems;Datatransmissionequipmentoperatinginthe2,4GHzband;HarmonisedStandardforaccesstoradiospectrum

ETSIEN300440,ShortRangeDevices(SRD);Radioequipmenttobeusedinthe1GHzto40GHzfrequencyrange;HarmonisedStandardcoveringtheessentialrequirementsofarticle3.2ofDirective2014/53/EU

ETSIEN301406,DigitalEnhancedCordlessTelecommunications(DECT);HarmonisedStandardcoveringtheessentialrequirementsofarticle3.2oftheDirective2014/53/EU

ETSIEN302065-1,ShortRangeDevices(SRD)usingUltraWideBandtechnology(UWB);HarmonisedStandardcoveringtheessentialrequirementsofarticle3.2oftheDirective2014/53/EU;Part1:RequirementsforGenericUWBapplications

1AsimpactedbyEN50136-1:2012/A1:2018.

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ETSIEN303406,ShortRangeDevices(SRD);SocialAlarmsEquipmentoperatinginthefrequencyrange25MHzto1000MHz;HarmonisedStandardcoveringtheessentialrequirementsofarticle3.2ofDirective2014/53/EU

ETSIEN303645,CYBER;CyberSecurityforConsumerInternetofThings:BaselineRequirements

3Terms,definitionsandabbreviations

3.1Termsanddefinitions

Forthepurposesofthisdocument,thefollowingtermsanddefinitionsapply.

ISOandIECmaintainterminologicaldatabasesforuseinstandardizationatthefollowingaddresses:

—ISOOnlinebrowsingplatform:availableat

/obp

—IECElectropedia:availableat

/

3.1.1

socialalarmsystem

systemproviding24hourfacilitiesforalarmtriggering,identification,signaltransmission,alarmreception,2-wayspeechcommunication,reassuranceandassistance,forusebypersonsconsideredtobeatrisk

3.1.2

alarmreceivingcentre

ARC

systempartwhichprovidesfacilitiesforcommunicationwithanumberofcontrollers,andprovidingthealarmreceivingandinformationprocessingsystemasaninterfacetothealarmrecipient

3.1.3

alarmtransmissionservicenetwork

ATSN

groupofATSsofthesamecategory

Note1toentry:AnATSNconsistsofoneormoreATSsofthesamecategory,functioningundersupervisionofthe

samemanagementandmonitoringcentre.

3.1.4

communications

transmissionofdatabetweenthetriggerdevice,localunitandcontrollerandtheARCoranalarmrecipient

3.1.5

controller

interfacebetweenoneormorelocalunitsandthealarmtransmissionsystemoralarmrecipient,thecontrollernormallyincludestheSPTasdefinedinEN50136-2

3.1.6

localunit

interfacebetweentheuserandthecontrollerwhichenables2-wayspeech

3.1.7

triggerdevice

systempart,operatedbyahumanorautomaticallythatcommunicatestothelocalunitandcontroller,initiatingthealarmtriggeringsignal

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3.1.8

logicalalarmtriggering

combinationofthepresenceorabsenceofdatafromoneormoresystempartswhichmeetsapredefinedconditionforthegenerationofanalarmtriggeringsignal

Note1toentry:Logicaltriggeringcanbeimplementedinanypartofthesocialalarmsystem.

3.1.9

deviceprovisioningandmanagementplatform

systemforthetechnicaladministrationoftheequipmentestateandmaybecapableofgeneratingalarms

3.1.10

interconnections

transmissionsystemthatprovidesthecommunicationbetweentriggerdevicesandlocalunitandcontroller

3.1.11

alarmtransmissionsystem

ATS

alarmtransmissionequipmentandnetworksusedtotransferinformationconcernedwiththestateofoneor

morelocalunitsandcontrollerstotheannunciationequipmentatoneormoreARCsoranalarmrecipientNote1toentry:AnATSmayconsistofmorethanoneATP.

3.1.12

alarmtransmissionpath

ATP

routeandalarmmessagetravelsbetweenanindividualalarmsystemanditsassociatedannunciationequipment

Note¹toentry:TheATPstartsattheinterfacebetweentheASandSTPandendsattheinterfacebetweentheRCTandAE.Fornotificationandsurveillancepurposes,thereversedirectionmayalsobeused.

3.1.13

pre-alarmcondition

conditionfollowingthereceptionofanalarmtriggeringsignal

3.1.14

alarmcondition

conditionfollowingthepre-alarmcondition

3.1.15

faultcondition

conditionfollowingdetectionofafaultbythelocalunitandcontroller,thatpreventsthefunctioningofthesystem

3.1.16

pre-alarmwarningindication

indicationatthelocalunitthatthelocalunitisinthepre-alarmcondition

3.1.17

faultindication

indicationofafaultcondition

3.1.18

reassuranceindication

indicationprovidedlocallyinalarmconditioninordertoverifytotheuserthatthelocalunithasreceivedthealarmtriggeringsignal

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3.1.19

alarmtriggeringsignal

signaltransmittedbyatriggerdevicetoindicateanalarm

3.1.20

alarmrecipient

personwhoreceivesandactsuponanalarmsignal

3.1.21

faultreportingtime

maximumintervalfromthetimeafaultoccursintheinterconnectionuntilthetransmissionofafaultsignalisinitiatedbythecontroller

3.2Abbreviations

Forthepurposesofthisdocument,thefollowingabbreviationsapply.

DTMFDualtonemulti-frequency;

PSTNPublicswitchedtelephonenetwork;

EMCElectromagneticcompatibility;

ETSIEuropeanTelecommunicationsStandardsInstitute;DPMPDeviceprovisioningandmanagementplatform

RFRadiofrequency

ASAlarmsystem

AEAnnunciationequipment

NOTEthetermusedintheEN50136seriesforAMSAMSAlarmManagementSystem

NOTEthetermusedintheEN50518seriesforAERCTReceivingcentretransceiver

SPTSupervisedpremisestransceiver

ATEAlarmTransmissionEquipment

ATAAnalogueTerminalAdapter

4Interconnections

4.1Generalrequirements

Theinterconnectionsshallbedesignedtoprovideareliablemeansofcommunicationbetweentriggeringdevices,thelocalunit(s)andthecontroller.Theinterconnectionmaybewiredand/orwireless.

Theinterconnectionsshallberegardedasanelementinaseriesofconnectedalarmtransmissionpathstowardsthealarmreceivingcentre.

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Theminimumperformancerequirementsforalarmtransmissionshallbeasstatedin4.3.Wheretheinterconnectionsareusedforthetransmissionofadditionalservicese.gvideo,habitmonitoringdata,actimetry,theperformanceavailabletoalarmtransmissionshallnotbediminished.

4.2Wireless

ForwirelessinterconnectionsviaRF,frequenciesdesignatedforlowdutycyclehighreliabilityequipment/socialalarmsystems)shallbeusedforthetransmissionofalarmandfaultsignals.

IftheRFinterconnectionisdeliveredusingalternativefrequencies,mitigationtechniquesforensuringreliablecommunicationasdescribedinTable1shallbeapplied.

Table1-TechniquesforReliableRFinterconnections

Type

Harmonizedstandard

Prerequisite

SRD

ETSIEN303406

Politespectrumaccess,adaptivefrequencyagilityandacknowledgement.

ETSIEN300220-2

ETSIEN300440

DECT

ETSIEN301406

Acknowledgement

UWB

ETSIEN302065-1

Acknowledgementandmitigationtechniques

2,4GHzWB

ETSIEN300328

Adaptiveequipmentusingadaptivemodewithacknowledgement

NOTE

MitigationtechniquesinUWBinclude"DetectandAvoid"and"LowDutyCycle".

IfothertypesofRFcommunicationareused,similarmitigationtechniquesforpolitespectrumaccessandacknowledgementshouldbeapplied.

4.3Availability

TheinterconnectionsinasocialalarmsystemshallhaveanavailabilitythatfulfilstherequirementsetoutinEN50136-1:20121,Table6,classSP6.

Thenecessaryavailabilityiscalculatedusingthemethodologyin8.6.6withinthisdocument.

4.4Monitoring

Forwiredandwirelesstriggerdevicestheinterconnectionsshallbemonitoredforavailability.

ForinterconnectionsthemaximumpermittedintervalbetweenperiodiccommunicationssignalsormessagesshallbeaccordingtoEN50136-1:20121,Table3,SP2.

ForinterconnectionsbetweenwiredtriggerdevicesandtheLocalUnitandcontrollerthemaximumreportingtimeshallbeaccordingtoEN50136-1:20121,Table3,SP5.

PortabletriggerdevicesmayberemovedfromthedesignatedoperatingareaasidentifiedinEN50134-7:2017,Clause8e)and,inthiscase,willbereportedasafaultsignalorstatusmessage.

ForinterconnectionsbetweenmultiplelocalunitsandacontrollerthemaximumpermittedintervalbetweenperiodiccommunicationsignalsormessagesshallbeaccordingtoEN50136-1:20121,Table3,SP6.

4.5Security

Inalarmsystemsthereisariskofmalicioussubstitutionofradiosignalstogeneratefalsealarmorfaultsignals.Whilstinotherapplicationsofalarmsystemsmalicioussubstitutioncouldposeasignificantrisktosystemintegrity,inthecaseofsocialalarmsthisriskisviewedasminimalandthisdocumentmakesnorequirementsforpreventativetechniques.

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4.6Transmissiontime

FortheinterconnectionbetweenatriggerdeviceandlocalunitthemaximumalarmandfaultsignaltransmissiontimeshallbeaccordingtoEN50136-1:20121,Table2,SP3.

ForinterconnectionsbetweenmultiplelocalunitsandacontrollerthemaximumalarmandfaultsignaltransmissiontimeshallbeaccordingtoEN50136-1:20121,Table2,SP6.

4.7Videoandotherapplications

Whereotherservicesutilizetheinterconnection,e.g.videobetweendwellings,videotoARC,voicetelephony,doorentry,internetprovisionthisusageshouldnotimpactordegradetheperformanceoftheinterconnectionforsocialalarmapplicationsasdescribedinthisdocument.

4.8Two-wayspeechcommunication

Theinterconnectionshouldhavesufficientcapacitytodeliverthebandwidthrequirementsforthenumberofratedsessionswithoutdegradationfromtheperformancerequirementssetoutin4.6.CapacitymanagementWheremultipletriggerdevicesareconnectedtoalocalunitandcontrollerthisshallnotimpactordegradetheperformanceoftheinterconnection(availability,transmissionandreportingtime)

5Communications

5.1Commentary

AnATSorATPmayincludepermanentdedicatedlinks,permanentvirtuallinksorswitchedlinkswhichmayuseequipmentthatisnotcoveredbytherequirementsofEN50136-2,EN50136-3andthisdocumentormaybeaffectedbyotherapplicationssharingthetransmissionlinks.

AnATPmayinclude:

a)atransmissionlinkthatissharedwithnon-alarmdataapplicationse.g.videoorcorporateLANtraffic,streamingentertainment

b)atransmissionlinkthatcarriesotherATPs,

c)equipmentfromathird-partytransmissionnetworkprovider,whichisnotlocatedateithertheuser'spremisesorthealarmreceivingcentreandisnotclassifiedasATE,

d)equipmentfromathirdpartywhichislocatedattheuser'spremisesbutisnotclassifiedasATE.Theperformance(reliability)ofanATScouldbeaffectedby:

e)unwanted,malformedorotherwisemaliciousincomingdataattheinterfacesoftheSPTorRCT,f)transmissionnetworkcongestionasaresultoftransmissionlinksharing,

g)transmissionnetworkunavailabilityduetoequipmentfailureand/ormaintenance.

NOTEAlarmtransmissionequipmentincludestheterminatione.g.ATAtothealarmtransmissionpath.

5.2Generalrequirements

ThealarmtransmissionsysteminasocialalarmsystemshallmeettherequirementswithinEN50136-1:20121.

Thealarmtransmissionsystemshallsupport,asaminimum,thefollowingcommunications:two-wayaudio,alarmandfaultsignals,andstatusmessages.

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TheendtoendtransmissionofaudioshallbeinaccordancewiththeperformancecriteriainEN50134-3:2012,4.2.4andshallsupportcodecG.711(a-law)asaminimumorprovideequivalentperformance.

Forcombinedlocalunitandcontrollersthepointtopointtransmissionofalarms,faults,controlsignalsandcommunicationsmonitoringbetweenthelocalunitandcontrollerandtheARCshalluseapacketbasedcommunicationprotocol.TheIPprotocolspecifiedinCLCTS50134-9shallbeusedwherethealarmtransmissionsystemimplementsaTCP/UDPprotocolcommunicationstack.Whereasocialalarmsystemisbeingusedtotransmitsi