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TABLEA1PRODUCTCATEGORYDEFINITIONSCATEGORYCODECATEGORYDEFINITIONEXAMPLES1SWITCHINGEQUIPMENTFORTHEPHYSICALORVIRTUALINTERCONNECTIONOFCOMMUNICATIONCHANNELSINRESPONSETOASIGNALINGSYSTEMTHESWITCHINGCATEGORYISBROADLYDEFINEDTOINCLUDEPACKETORCIRCUITSWITCHEDARCHITECTURES11CIRCUITSWITCHEQUIPMENTFORTHETERMINATIONOFSUBSCRIBERLINESAND/ORTRUNKLINESANDTHEDYNAMICINTERCONNECTIONOFTHESEPORTSORCHANNELSINADIGITALTRANSMISSIONFACILITYACIRCUITSWITCHESTABLISHESADEDICATEDCIRCUIT,ASOPPOSEDTOAVIRTUALCIRCUIT,INRESPONSETOASIGNALSTOREDPROGRAMCONTROLSPCISTHEMOSTCOMMONTYPEOFSWITCHINGEQUIPMENTUSEDATENDOFFICESANDTANDEMOFFICESTHESESYSTEMSUSEEITHERANALOGORDIGITALSWITCHINGTHESWITCHINGSYSTEMUSEDMUSTHAVETHECAPABILITYTOSEND,RECEIVEANDBEACTUATEDBYSIGNALS,EG,ACCESSLINESIGNALS,ORINTEROFFICEINBANDORCOMMONCHANNELSIGNALINGTHISCATEGORYINCLUDESALLCIRCUITSWITCHESREGARDLESSOFTRANSMISSIONMEDIUM,IE,WIRELINE,ORWIRELESSENDOFFICETANDEMTANDEMACCESSREMOTESERVICESWITCHINGPOINTSSPMOBILESWITCHINGCENTERMSC12PACKETSWITCHEQUIPMENTFORSWITCHINGORROUTINGDATAONVIRTUAL,ASOPPOSEDTODEDICATED,CIRCUITSTHESERVICEISPACKETSWITCHEDINTHATTHECUSTOMERSDATAISTRANSPORTEDASASEQUENCEOFDATABLOCKSPACKETSTHATDONOTEXCEEDASPECIFIEDSIZETHISPACKETIZATIONPERMITSDATAFROMMANYDATACONVERSATIONSTOSHAREAGIVENTRANSMISSIONFACILITYECONOMICALLYTHROUGHSTATISTICALMULTIPLEXINGSUCHDATACONVERSATIONSAREKNOWNASVIRTUALCIRCUITS,WHICHAREFULLDUPLEXANDCONNECTIONORIENTED121PUBLICPACKETSWITCHEDNETWORKPPSNEQUIPMENTFORTHEPROVISIONOFCONNECTIONORIENTED,PACKETSWITCHEDCOMMUNICATIONSERVICESDESIGNEDTOPROVIDEECONOMICALDATATRANSPORTBASEDONINTERNATIONALLYSTANDARDIZEDPACKETPROTOCOLSTHEPACKETSWITCHISTHEPRIMARYSWITCHINGELEMENTOFTHENETWORKALLOWINGEFFICIENTCONNECTIVITYTOMANYCUSTOMERSTHEACCESSCONCENTRATORCONCENTRATESTRAFFICFROMLOWERSPEEDACCESSLINESFORMOREEFFICIENTPACKETSWITCHPORTUSAGEANDPERFORMSANYNECESSARYPROTOCOLCONVERSIONVIATHEPACKETASSEMBLER/DISASSEMBLERPADFUNCTIONX25PACKETSWITCHACCESSCONCENTRATOR/PAD122IPPACKETSWITCH/ROUTEREQUIPMENTWHICHMOVESVARIABLELENGTHIPINTERNETPROTOCOLPACKETSFROMSOURCETODESTINATIONROUTINGGENERALLYUSESSOFTWAREALGORITHMSTOOPTIMIZEONE1ORACOMBINATIONOFDATATRANSPORT“METRICS”,SUCHASDELAY,THEUSEOFRELIABLEPATHS,“HOPS”BETWEENSERVERS,ETCSWITCHINGISGENERALLYFASTERTHANROUTERSSINCETHEDECISIONASTOWHERETOSENDTHEPACKETISDONEBYHARDWARE,BUTAREALSOLIMITEDTOLESSSOPHISTICATEDALGORITHMSTHANAREROUTERSTODETERMINEWHICHPATHTHEPACKETSSHOULDUSEMOSTSYSTEMSTABLEA1PRODUCTCATEGORYDEFINITIONSCATEGORYCODECATEGORYDEFINITIONEXAMPLESPROVIDEACOMBINATIONOFROUTINGANDSWITCHING,ASAPPROPRIATE,TOBESTSERVETHENEEDSOFTHEUSER123ASYNCHRONOUSTRANSFERMODEATMSWITCHSWITCHINGEQUIPMENTWHICHOPERATESATOSILEVEL2HARDWARELAYERTOMOVEFIXEDLENGTH53BYTEDATACELLSFROMSOURCETODESTINATIONOVERVIRTUALPATHSORCHANNELSATMISDESIGNEDTOSUPPORTMIXEDDATATYPESVOICE,VIDEO,COMPUTERCOMMUNICATIONS,ETC,PROVIDESSELECTABLEQUALITYOFSERVICEGUARANTEESANDEASILYENABLESBILLINGFORDATASWITCHINGSERVICESTHROUGHPUTOFUPTO622MBPSISCOMMONLYAVAILABLEINATMSWITCHES124FRAMERELAYSWITCHSWITCHINGEQUIPMENTWHICHOPERATESATOSILEVEL2HARDWARETOMOVEVARIABLELENGTHFRAMERELAYFRAMESOVERVIRTUALCIRCUITSFROMSOURCETODESTINATIONDATAAREMOVEDWITHOUTDATAINTEGRITYCHECKSORFLOWCONTROLATUPTOT3RATES2SIGNALINGEQUIPMENTFORTHEPROVISIONOFSIGNALING,IE,STATESAPPLIEDTOOPERATEANDCONTROLTHECOMPONENTGROUPSOFATELECOMMUNICATIONSCIRCUITTOCAUSEITTOPERFORMITSINTENDEDFUNCTIONGENERALLYSPEAKING,THEREAREFIVE5BASICCATEGORIESOF“SIGNALS“COMMONLYUSEDINTHETELECOMMUNICATIONSNETWORKINCLUDEDARESUPERVISORYSIGNALS,INFORMATIONSIGNALS,ADDRESSSIGNALS,CONTROLSIGNALS,ANDALERTINGSIGNALSTHISCATEGORYINCLUDESTHOSESIGNALINGPRODUCTSTHATFUNCTIONWITHINTHETELECOMMUNICATIONSNETWORKANDEXCLUDESPOSSIBLYSIMILARPRODUCTSWHICHWOULDNORMALLYPROVIDEENHANCEDSERVICESOUTSIDETHENETWORK,ORONTHECUSTOMERPREMISES,SUCHASACD,IVR,ORVOICEMESSAGINGSYSTEMS21SERVICECONTROLPOINTSCPASIGNALINGPOINTTHATFUNCTIONSASADATABASETOPROVIDEINFORMATIONTOANOTHERSCPORSERVICESWITCHINGPOINTSSPTRANSACTIONCAPABILITIESAPPLICATIONPARTTCAPQUERIESANDRESPONSESAREUSEDTOCOMMUNICATEWITHTHESCPASISDONEFOR800DATABASESERVICEANDABSSCPSMAYSUPPORTONE1ORMORESERVICESPERSCPANDSCPSMAYBEDEPLOYEDSINGULARLYASSTANDALONENODES,ASMATEDPAIRS,ORASMULTIPLEREPLICATESMORETHAN2TOINCREASETHEIRAVAILABILITYSCPS,CONNECTEDTOSTPS,AREASSOCIATEDWITHAPPLICATIONSTHATCONSISTOFSERVICESPECIFICSOFTWAREANDADATABASEOFCUSTOMERRELATEDINFORMATIONTHISPRODUCTCATEGORYINCLUDESCONVENTIONALSCPEQUIPMENT,PLUSOTHERPLATFORMSSUCHASSERVICENODES,INTELLIGENTPERIPHERALS,ORSERVICERESOURCEFACILITIES,WHICHMAYCOMBINECAPABILITIESOFASCP,SSPORWHICHMAYBEUSEDTOPROVIDEAINFUNCTIONALITYOROTHERENHANCEDSERVICESWITHINTHENETWORKSERVICECONTROLPOINTSERVICENODESSERVICERESOURCEFACILITIES22SIGNALINGTRANSFERPOINTSTPASIGNALINGPOINTWITHTHEFUNCTIONOFTRANSFERRINGSIGNALINGMESSAGESFROMONE1SIGNALINGLINKTOANOTHERANDCONSIDEREDEXCLUSIVELYFROMTHEVIEWPOINTOFTABLEA1PRODUCTCATEGORYDEFINITIONSCATEGORYCODECATEGORYDEFINITIONEXAMPLESTHETRANSFERANSTPISASPECIALIZEDROUTINGSIGNALINGPOINTSPITISANSS7BASEDPACKETSWITCHTHATTRANSFERSSS7MESSAGESTOANDFROMOTHERSPSANDISALWAYSDEPLOYEDINMATEDPAIRSFORRELIABILITYTHESTPUSESTHEMESSAGETRANSFERPARTMTPANDTHESIGNALINGCONNECTIONCONTROLPARTSCCPOFTHESS7PROTOCOLTOSCREENANDROUTEMESSAGESDESTINEDFOROTHERNODESINTHESS7NETWORKITFUNCTIONSASANSS7NETWORKROUTINGHUB,INTERFACINGWITHSPSONLYTHROUGHSS7LINKSANDNOTVOICEORDATATRUNKSWITHINTHELECCCSNETWORKSTRUCTURE,STPSAREARCHITECTURALLYREFERREDTOASEITHERLOCALSTPSLSTPSORREGIONALSTPSRSTPS23HOMELOCATIONREGISTERHLREQUIPMENTTOPROVIDEAPERMANENTDATABASEUSEDINWIRELESSAPPLICATIONSTOIDENTIFYASUBSCRIBERANDTOCONTAINSUBSCRIBERDATARELATEDTOFEATURESANDSERVICESITSTORESINFORMATIONSUCHASSERVICEPROFILES,LOCATIONANDROUTINGINFORMATIONFORROAMERS,SERVICEQUALIFICATION,INTERFACEFORMOVES,ADDSANDCHANGESITCOMMUNICATESWITHOTHERHLRSANDPROVIDESACCESSTOMAINTENANCEFUNCTIONSSUCHASFAULTINFORMATION,PERFORMANCEDATA,ANDCONFIGURATIONPARAMETERS3TRANSMISSIONEQUIPMENTFORTHECONNECTIONOFTHESWITCHEDANDINTEROFFICENETWORKSWITHINDIVIDUALCUSTOMERSANINTEGRALPARTOFTHEDISTRIBUTIONNETWORKISTHELOOP,WHICHCONNECTSTHECUSTOMERTOTHELOCALCENTRALOFFICECO,THUSPROVIDINGACCESSTOTHEINTEROFFICENETWORK31OUTSIDEPLANTTHEPARTOFTHETELECOMMUNICATIONSTHATISPHYSICALLYLOCATEDOUTSIDEOFTELEPHONECOMPANYBUILDINGSTHISINCLUDESCABLES,SUPPORTINGSTRUCTURES,ANDCERTAINEQUIPMENTITEMSSUCHASLOADCOILSMICROWAVETOWERS,ANTENNAS,ANDCABLESYSTEMREPEATERSARENOTCONSIDEREDOUTSIDEPLANT311TRANSMISSIONMEDIUMOPTICALFIBER,METALLICCABLE,OROTHERPHYSICALMEDIUMFORTHETRANSMISSIONOFANALOGORDIGITALCOMMUNICATIONS3111METALLICPRODUCTSMETALLICASOPPOSEDTOOPTICALORWIRELESSTRANSMISSIONMEDIA31111METALLICCONDUCTORCABLEMETALLICPAIRSOFCONDUCTORSHOUSEDINAPROTECTIVECABLEMETALLICCABLECENTRALOFFICECOAXIALCABLEHYBRIDCCOAXIAL/TTWISTEDPAIRDROP31112METALLICCONNECTORSDEVICESUSEDTOTERMINATEAMETALLICCABLECOAXIALCONNECTORSCOAXIALDISTRIBUTIONCONNECTORSTABLEA1PRODUCTCATEGORYDEFINITIONSCATEGORYCODECATEGORYDEFINITIONEXAMPLES3112OPTICALFIBERPRODUCTSOPTICAL,ASOPPOSEDTOMETALLICORWIRELESSTRANSMISSIONMEDIA31121OPTICALFIBERAGLASSFIBERWHEREINLIGHTISPROPAGATEDANDANYASSOCIATEDCOVERINGMULTIMODEFIBERSTANDARDSINGLEMODEFIBERDISPERSIONSHIFTEDFIBERNONZERODISPERSIONSHIFTEDFIBERLOOSETUBECABLECENTRALTUBECABLE31122OPTICALCONNECTORSDEVICEUSEDTOTERMINATEANOPTICALCABLEOPTICALSC,ST,ORMTCONNECTORSCONNECTORIZEDCABLEASSEMBLIES,EG,OPTICALFIBERRIBBONFANOUTS3113TRANSMISSIONCOMPONENTSCOMPONENTSEMBEDDEDINTHETRANSMISSIONMEDIUMOTHERTHANCABLEORCONNECTORS31131ACTIVECOMPONENTSMETALLICCOMPONENTSCONTAININGELECTRONICSCOAXIALDDROPAAMPLIFIERSFIBEROOPTICDDATALLINKS31132PASSIVEOPTICALCOMPONENTSOPTICALCOMPONENTSCONTAININGNOELECTRONICSWAVELENGTHDIVISIONMULTIPLEXERWDMADDDDROPMMULTIPLEXERSFIBEROOPTICDDISPERSIONCCOMPENSATORSOPTICALIISOLATORSFILTERSATTENUATORS31133ANCILLARYEQUIPMENTOTHERTRANSMISSIONCOMPONENTSNOTSPECIFICALLYCOVEREDINOTHERTRANSMISSIONCOMPONENTCATEGORIESTYPICALLYPASSIVESURGEPROTECTORSBONDINGANDGROUNDINGHARDWARETABLEA1PRODUCTCATEGORYDEFINITIONSCATEGORYCODECATEGORYDEFINITIONEXAMPLESTAPS312PHYSICALSTRUCTUREEQUIPMENTFORTHESUPPORTOFTELEPHONETRANSMISSIONMEDIATHESEPHYSICALSTRUCTURESINCLUDEPOLES,TOWERS,CONDUITS,EQUIPMENTENCLOSURESSUCHASHUTS3121ENCLOSURESENCLOSURESFORNETWORKEQUIPMENTLOCATEDINTHEOUTSIDEPLANTFIBEROPTICSPLICEENCLOSURESONUENCLOSURESORGANIZERASSEMBLIESSEALASSEMBLIESCONTROLLEDENVIRONMENTVAULTS3122SUPPORTSTRUCTURESPRODUCTSFORTHEPHYSICALSUPPORTOFTRANSMISSIONMEDIAORENCLOSURESTELEPHONEPOLESPEDESTALSMICROWAVE/RADIOTOWERS3123CONDUITSCHANNELSFORTHECONTAINMENTOFOPTICALFIBERORMETALLICCABLEINNERDUCTMULTIBORECONDUITPVCPIPE32TRANSPORTEQUIPMENTEQUIPMENTLOCATEDINTHECENTRALOFFICEORATTHECUSTOMERPREMISES,BUTINSIDETHENETWORKDEMARCATIONPOINT,FORTHETRANSMISSIONOFDIGITALORANALOGCOMMUNICATIONOVERTRANSMISSIONMEDIATHISPRODUCTCATEGORYINCLUDESEQUIPMENTFORTERMINATING,INTERCONNECTING,ANDMULTIPLEXINGCOMMUNICATIONSCIRCUITSTABLEA1PRODUCTCATEGORYDEFINITIONSCATEGORYCODECATEGORYDEFINITIONEXAMPLES321CROSSCONNECTSYSTEMSEQUIPMENTTOPROVIDEAPHYSICALTERMINATIONPOINTFORPHYSICALCABLESANDINDIVIDUALCONDUCTORSTHEYCANBEMANUALORAUTOMATED,METALLICOROPTICALCROSSCONNECTSYSTEMS,SUCHASDISTRIBUTINGFRAMES,DIGITALSIGNALCROSSCCONNECTSDSXSANDFIBERDISTRIBUTINGFRAMESFDFSPROVIDETHEFOLLOWINGBASICFUNCTIONSCROSSCONNECTIONOFNETWORKDISTRIBUTIONFACILITIESANDEQUIPMENTINTHECENTRALOFFICE,ELECTRICALPROTECTIONFORCONDUCTIVEMEDIA,TESTACCESS,TEMPORARYDISCONNECTION,ANDTERMINATIONPOINTSFORFACILITIESANDEQUIPMENTDIGITALSIGNALCROSSCONNECTDSXDIGITALINTERFACESYSTEMDISFIBERDISTRIBUTIONFRAMEFDFFEEDERDISTRIBUTIONINTERFACEFDIDIGITALCROSSCONNECTSYSTEMDCSELECTRONICDSXOPTICALDSXOPTICALINTERFACESYSTEMS322CARRIERSYSTEMS/MULTIPLEXERSEQUIPMENTFORTRANSMITTINGMULTIPLECOMMUNICATIONCHANNELSOVERASINGLETRANSMISSIONFACILITYTHISCATEGORYINCLUDESEQUIPMENTFORTRANSMISSIONOVERINTEROFFICETRUNKS,FOREXAMPLE,FROMCENTRALTOREMOTEOFFICES3221INTEROFFICE/LONGHAULEQUIPMENTFORTRANSMISSIONBETWEENCENTRALOFFICES,BETWEENEXCHANGES,ORBETWEENCARRIERS,ASOPPOSEDTOTRANSMISSIONBETWEENANENDOFFICEANDAREMOTELOCATION,TYPICALOFALOOPCARRIER32211METALLICCCARRIERSSYSTEMCARRIERSYSTEMTHATUSESMETALLICTRANSMISSIONMEDIUMANALOGCARRIERN,LCARRIERD4,D5DIGITALCARRIER32212OPTICALCCARRIERSSYSTEMCARRIERSYSTEMTHATUSESOPTICALTRANSMISSIONMEDIUM322121SONET/SDHTRANSPORTSYSTEMSFULLYFEATUREDDIGITALTRANSMISSIONSYSTEMEMPLOYINGOPTICALMEDIUMOC3,12,48,OR192SONETEQUIPMENTCONFIGURABLEASLINEARORRINGSIMILARFORSTMXSDHEQUIPMENT322122WDM/DWDM/OPTICALAMPLIFICATIONPRODUCTSSHELFLEVELSUBSYSTEMSUSEDFORMULTIPLEXING,DEMULTIPLEXING,ORAMPLIFICATIONOFOPTICALSIGNALSLACKTHEBUILTINPROTECTION,ELECTRICALCONVERSIONANDOTHERFEATURESOFASONETTRANSPORTSYSTEMWAVELENGTHDIVISIONMULTIPLEXERWDMDENSEWAVELENGTHDIVISIONMULITPLEXERTABLEA1PRODUCTCATEGORYDEFINITIONSCATEGORYCODECATEGORYDEFINITIONEXAMPLES32213MICROWAVECARRIERSYSTEMTHATEMPLOYSFIXEDMICROWAVETRANSMISSION6,8,11,OR18GGIGAHERTZMMICROWAVERRADIO3222LOOPCARRIEREQUIPMENTFORDEPLOYINGMULTIPLEVOICEORDIGITALCHANNELSOVERFEWERPHYSICALCHANNELSTHANWOULDBEOTHERWISEREQUIREDA“PAIRGAIN”FUNCTIONLOOPCARRIERSARETYPICALLYDIGITALSYSTEMSWHICHEMPLOYTIMEDOMAINMULTIPLEXINGTDMBUTMAYINCLUDEANALOGSYSTEMSASWELLLOOPCARRIERSYSTEMSCONSISTOFACENTRALOFFICETERMINALCOTLOCATEDNEARTHESWITCHINGSYSTEM,AREMOTETERMINALRTLOCATEDNEARTHECUSTOMERTOBESERVEDANDATRANSMISSIONFACILITYCONNECTINGTHECOTTOTHERTINDIVIDUALCOMMUNICATIONSCIRCUITSSUCHASPOTSANDFOREIGNEXCHANGEFXAREACCEPTEDASSEPARATEINPUTSATTHECOTRT,TIMEDIVISIONMULTIPLEXEDINADIGITALLOOPCARRIERBYTHELOOPCARRIERSYSTEMANDREPRODUCEDATTHERTCOTTHEREISANANALOGTODIGITALA/DCONVERSIONOFANALOGINPUTSTOTHEDLCANDTHESESIGNALS,WHICHARECARRIEDDIGITALLYWITHINTHEDLC,UNDERGOADIGITALTOANALOGD/ACONVERSIONWHENOUTPUTATTHECOTORRTTHETRANSMISSIONFACILITYUSEDBYALOOPCARRIERMAYBEMETALLICCABLEPAIRS,REPEATEDMETALLICCABLEPAIRS,OROPTICALFIBERSDIGITALLOOPCARRIERDLCUNIVERSALDIGITALLOOPCARRIERUDLCSLCREMOTETERMINALINTEGRATEDDIGITALLOOPCARRIERANALOGLOOPCARRIER323LINETERMINATINGEQUIPMENT/DISTRIBUTINGFRAMESEQUIPMENTTOPROVIDETHETERMINATIONPOINTFORVOICEGRADEANDVOICEGRADECOMPATIBLEFACILITIESANDEQUIPMENTINACENTRALOFFICEITISCOMPOSEDOFPROTECTORS,CONNECTORSANDTERMINALSTRIPSORBLOCKSDISTRIBUTINGFRAMESARECATEGORIZEDASEITHERCONVENTIONALORMODULARTALLCONVENTIONALDISTRIBUTINGFRAMESLOWPROFILECONVENTIONALDISTRIBUTIONFRAMESLPCDFSCONVENTIONALPROTECTORFRAMESCOMBINEDMAINDISTRIBUTINGFRAMECMDFSUBSCRIBERMAINDISTRIBUTINGFRAMESMDFTRUNKMAINDISTRIBUTINGFRAMETMDFINTERMEDIATETABLEA1PRODUCTCATEGORYDEFINITIONSCATEGORYCODECATEGORYDEFINITIONEXAMPLESDISTRIBUTINGFRAMEIDFTIEPAIRDISTRIBUTINGFRAMETPDFOFFICEREPEATERBAYS324DIGITALSUBSCRIBERLINEDSLEQUIPMENTFORTHETRANSPORTOFHIGHSPEEDDIGITALDATAONTHEEMBEDDEDCOPPERPLANTDSLTYPICALLYWILLOPERATEOVERNONREPEATERED,POTSLIKE,CONDITIONEDUNLOADEDLOOPSOUTTOCSARANGESTHISPRODUCTCATEGORYINCLUDESCENTRALOFFICEANDREMOTEUNITS,REGENERATORSORRANGEEXTENDERS,ANDSUPPORTINGEQUIPMENTISDNHDSLADSLDDS33WIRELESSTRANSMISSIONEQUIPMENTFORANALOGORDIGITALTRANSMISSIONTOTHESUBSCRIBERUNIQUETOWIRELESSSERVICESTHISCATEGORYDOESNOTINCLUDEINTEROFFICEORLONGHAULWIRELESSCARRIERSYSTEMS331BASESTATIONEQUIPMENTEQUIPMENTWHICHPROVIDESTHEINTERFACEBETWEENWIRELESSSYSTEMSANDTHEPUBLICSWITCHEDTELEPHONENETWORKPSTNITPROVIDES,FOREXAMPLE,ELECTRICALSIGNALINGISOLATIONASWELLASSWITCHING,ROUTING,BILLING,ANDFEATURESCAPABILITIESITPROVIDESSUBSYSTEMSFORVOCODINGANDSELECTINGHANDOFFDECISIONBSCBSS332BASETRANSCEIVERSYSTEMBTSEQUIPMENTWHICHPROVIDESTHERADIOLINKTOTHEMOBILESUBSCRIBERSITISCONNECTEDTOTHEBSCTHOUGHABACKHAULINTERFACEBETWEENTHEBSCANDBTSFORBOTHVOCODEDANDOVERHEADPACKETTRAFFICBTS333PILOTBEACONUNITPBUEQUIPMENTWHOSEPRIMARYPURPOSEISTOTRANSMITANDANSIJSTD008PPILOTCHANNELANDANSIJSTD008SYNCCHANNELANDAPARTIALANSIJSTD008PAGINGCHANNELTHEPBUISINTENDEDTONOTIFYAMMOBILUNITOFACHANGEINCDMACOVERAGEANDCANBEUSEDTOASSISTINTHEEXECUTIONOFCELLULARCDMAAMPSANDINTERFREQUENCYCDMACDMAHANDOFFITISDESIGNEDWITHTHECAPABILITYFOREXTENDEDTEMPERATUREANDENVIRONMENTALOPERATIONRANGES4OPERATIONS,HOWEVER,ITINHIBITSTHEABILITYTOMAINTAINTHENETWORKANDTORESTORELOSTSERVICE413TESTSUPPORTSOFTWARECOMPUTERSOFTWARETHATRUNSONAGENERALPURPOSECOMPUTEROFFICEENVIRONMENTANDPERHAPSTHEMAINTENANCENETWORKTHATTHECOMPUTERUSESTOCOMMUNICATEWITHTHECOACCESSANDTESTEQUIPMENT42OPERATIONSSUPPORTSYSTEMSSYSTEMSTHATPROVIDETMNTELECOMMUNICATIONMANAGEMENTNETWORKCOMPLIANT,FLEXIBLE,SCALEABLE,ANDINTEROPERABLESOLUTIONSTOAUTOMATESERVICEACTIVATION,SERVICEASSURANCE,ANDNETWORKCAPACITYMANAGEMENTPROCESSESTOWORLDWIDEEXISTINGANDEMERGINGNETWORKSERVICESANDEQUIPMENTPROVIDERS421ONLINECRITICALREALTIMESYSTEMS,DEMANDINGHIGHAVAILABILITY,TYPICALLY24HOURSADAYAND7DAYSPERWEEKNETWORKTRAFFICMANAGEMENTSURVEILLANCEOF911FIREALARMS422ONLINENONCRITICALREALTIMESYSTEMSWITHLOWERAVAILABILITYDEMANDSTHANONLINECRITICALSYSTEMSPROVISIONINGDISPATCHMAINTENANCE423OFFLINETRADITIONALBUSINESSSYSTEMSTHATARERUNOFFLINESOMETIMESINBATCHMODE,TYPICALLYOVERNIGHTANDDONOTHAVEHIGHAVAILABILITYEXPECTATIONSINVENTORYBILLINGRECORDSSERVICECREATIONPLATFORM5COMMONSYSTEMSANYOFAVARIETYOFSPECIALIZEDGENERIC,SHAREDEQUIPMENTTOSUPPORTNETWORKELEMENTSCOMMONSYSTEMSINCLUDEPOWERSYSTEMSANDTHENETWORKEQUIPMENTBUILDINGSYSTEMNEBSTHATPROVIDESSPACEANDENVIRONMENTALSUPPORTFORNETWORKELEMENTSTHESESYSTEMSARELOCATEDINCENTRALOFFICESANDREMOTEBUILDINGLOCATIONS51SYNCHRONIZATIONEQUIPMENTFOROPERATINGDIGITALSYSTEMSATACOMMONCLOCKRATEFREQUENCYSYNCHRONIZATIONTHISCATEGORYINCLUDESPRIMARYREFERENCESOURCESANDOTHERTIMINGSIGNALGENERATORSTHATPRODUCETATIMINGSIGNALTRACEAB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