User's Manual

DevicePlacementontheLayoutModel
3Com®AirProtectPlannerUserGuide
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Figure 96. AP SINR View: Outdoor Layout
7.2.7 SensorCoverageView
ThisviewhelpsplantheplacementofSensors.ItdisplaysthezoneofvisibilityforeachSensor.Sensorscancover802.11a,
802.11b,802.11g,802.11a/n,and802.11b/g/nprotocols.SensorsareplacedonthelayoutsuchthattheycandetectWLAN
activityateachpointonthelayoutanditsperimeterandcanpreventunauthorizedactivity.
Recommended:PlanSensorplacementsuchthateachpointonthelayoutanditsperimeterisvisibletotwoorthreeSensors.You cando
thisusingtheSensorRedundancyView.
TherearetworangesforSensors’RFvisibility:DetectionandPrevention.YoucanvieweitherthePreventionrange,orthe
Detectionrange,orbothusingthetwocheckboxes:ShowPreventionandShowDetectionprovidedatthebottomofthe
screen.
• DetectionRange:AreafromwhichSensorscanreliablydetect
anywirelessactivity.Detectionisbasedondatarate
(linkspeed)ofprotocols.SpecifythedatarateorusetheDeviceTransmitPower(dBm)slidertocontrolthedatarate
forwhichyouwanttoseedetection.Sensorscandetectallthedevices(withtransmitpowersetgreaterthanthatin

thesliderbar)locatedwithinitsdetectionrange.Forfurtherspecificresults,selectcertainprotocolsandthenspecify
thedataratesforeach.
Note:Ifyoudisableaprotocol,theviewwillchangeaccordinglyandshowpreventionanddetectiononlyfortheactiveprotocols.
• PreventionRange:AreaoverwhichSensorscanreliablypreventanyunauthorizedwirelessactivityandblock
unwantedWLANdevices.YoucanalsousethePreventionReliabilityslidertocontrolthepreventionrange.Asthe
preventionreliabilityincreases,thepreventionrangereduces.
¾ LowPreventionReliabilityindicatestheoptimisticestimatesofthe
preventionrangeofSensors.Theactual
preventionrangeislikelytobelessthanthepredictedpreventionrange.
¾ MediumPreventionReliabilityindicatesthemostlikelypreventionrangeofSensors.Theactualprevention
rangeislikelytobecomparablewiththepredictedpreventionrange.
¾ HighPreventionReliabilityindicatesconservative
estimatesofthepreventionrangeofSensors.Theactual
preventionrangeislikelytobegreaterthanthepredictedpreventionrange.