Cisco Systems CommonorDistributedAntennaSystem(DAS), Elevators

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CiscoAironetAccessPointDeploymentGuide 
CiscoSystems
Copyright©2012CiscoSystems,Inc.Allrightsreserved.
Page26of52
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CommonorDistributedAntennaSystem(DAS)
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Duetothedual‐bandnatureoftheantennasystemontheAP2600andtheAP3600,alongwithkey
featuressuchasClientLink2.0beamforming,theAP2600andtheAP3600arenotrecommendedfor
deploymentsonDistributedAntennaSystems(DAS).
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Note:Ciscodoesnotcertify,endorseorprovideRFsupportforWi‐FideploymentsoveranyDAS.
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TheDASvendorandsystemsintegratoraresolelyresponsibleforthesupportoftheDASproducts,
adequateRFcoverage,andanyRF‐relatedissues.Thissupportincludes,butisnotexclusiveto,location
accuracy,RFcoverage,roamingissuesrelatedtoRF,multipathissues,andscalability.
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TheDASvendorandsystemsintegratorarealsoresponsibleforunderstandingthatthedeployedDAS
systemmeetstherequirementsofallofthecustomerWi‐FidevicesandapplicationsovertheDAS
system;thisstatementincludes,butisnotexclusiveto,allVoiceoverWLAN(VoWLAN)andmedical
devices.
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WhileCiscoTechnicalAssistanceCenter(TAC)andCiscofieldteamsdonotprovidesupportforRFissues
thatariseinaCiscoWLANusedoveraDAS,theydoprovidesupportfornon‐RFrelatedissuesinCisco
productsaccordingtothecustomersupportagreementwithCiscoSystems.
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Formoreinformation,seethefollowingURL:
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http://www.cisco.com/en/US/prod/collateral/wireless/ps5678/ps6973/positioning_statement_c07‐
565470_ps10092_Products_Data_Sheet.html
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Elevators
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ElevatorcoveragecansometimesbeaccomplishedbyplacingAPsinthenearfieldoftheelevator,
typicallyoneachfloorneartheelevatordoor.Sinceelevatorsoftenhavemetaldoors,andtheshaftsare
oftenconcreteorcontainothermaterialsthatdegradeWi‐Ficoverage,itisimportanttocheckthe
coverageinsidetheelevator.Elevatorcoveragecanbeachallenge,butitisoftenpossible,especiallyif
theelevatoronlyservesafewfloors.
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Inhighriseelevators,roamingissuesaremoreproblematicbecausetheclientcyclesthroughalarge
numberofAPsratherquickly.Somecompaniesputapatchantennaonthefloorinsidetheshaftanda
patchantennaonthebottomoftheelevatorcar,whileothercompaniesuseleakycoaxialcablealong
thesideoftheshaft.
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WheninstallinganyWi‐Fiequipmentinsideelevatorcarsorshafts,followlocalregulations.Some
installationsmaybeprohibitedbecauseofsafetyreasons,whileotherinstallationsmaybeprohibitedby
thebuildingownerorlocalfiredepartment.Onlyelevatorrepairpersonsorexperiencedcontractors
shouldperformthistypeofwork.
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