- Cisco Network Router User's Manual

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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r elated
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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