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Руководство пользователя. Версия 2.0 Страница: 601

D-Link DWS-4026 Руководство пользователя. Версия 2.0 онлайн [601/741] 172936

ConfiguringAdvancedSettings

D-Link UnifiedWiredandWirelessAccessSystem

November2011 Page601

D‐LinkUWSUserManual

DTIMPeriod TheDeliveryTrafficInformationMap(DTIM)messageisanelementincludedinsome

Beaconframes.Itindicateswhichclientstations,currentlysleepinginlow‐power

mode,havedatabufferedontheaccesspointaw aitingpick‐up.

TheDTIMperiodyouspecif y indicateshowoftentheclientsservedbythisacce

ss

pointshouldcheckforbuffereddatastillontheAPawaitingpickup.

SpecifyaDTIMperiodwithinthegivenrange(1–255).

Themeasurementisinbeacons.Forexample,ifyousetthisfieldto1,clientswill

checkforbuffereddataontheAPateverybeacon.Ifyousetthisfieldto10,cli

ents

willcheckonevery10thbeacon.

BeaconInterval Beaconframesaretransmittedbyanaccesspointatregularintervalstoannounce

theexistenceofthewirelessnetwork.Thedefaultbehavioristosendabeaconframe

onceevery100milliseconds(or10persecond).

TheBeaconIntervalvalueisse

tinmilliseconds.Enteravaluefrom20to2000.

AutomaticChannel Thechanneldefinestheportionoftheradiospectrumthattheradiousesfor

transmittingandreceiving.Therangeofchannelsandthedefaultchannelare

determinedbytheModeoftheradiointerface.

WhentheAPboots,theAPscanstheRFar

eaforoccupiedchannelsandselectsa

channelfromtheavailablenon‐interferingorclearchannels.However,channel

conditionscanchangeduringoperation.

EnablingtheAutomaticChannelmakesAPsassignedtothisprofileeligibleforauto‐

channelselection.Youcanautomaticallyormanuallyruntheauto‐channelsele

ction

algorithmtoallowtheDWS‐4000SeriesswitchtoadjustthechannelonAPsasWLAN

conditionschange.

Bydefault,theglobalauto‐channelmodeissettomanual.Toenabletheautomatic

channelselectionmode,gototheAPManagement>RFManagementpageand

selectFixedorIntervalfo

rtheChannelPlanmode.Youcanalsoruntheautomatic

channelselectionalgorithmmanuallyfromtheManualChannelPlanpage.

Note:IfyouassignastaticchanneltoanAPintheValidAPdatabaseoronthe

AdvancedAPManagementpage,theAPwillnotparticipateintheauto‐channe

l

selection.

AutomaticPower ThepowerlevelaffectshowfaranAPbroadcastsitsRFsignal.Ifthepowerlevelis

toolow,wirelessclientswillnotdetectthesignalorexperiencepoorWLAN

performance.Ifthepowerlevelistoohigh,theRFsignalmightinterferewithother

APswithinra

nge.

AutomaticpowerusesaproprietaryalgorithmtoautomaticallyadjusttheRFsignal

tobroadcastfarenoughtoreachwirelessclients,butnotsofarthatitinterfereswith

RFsignalsbr oadcastbyotherAPs.Thepo werlevelalgorithmincreasesordecreases

thepowerlevelin10%incrementsbasedonpresenceorabs

enceofpacket

retransmissionerrors.

DefaultPower Theautomaticpoweralgorithmwi ll notreducethepowerbelowthenumberyouset

inthedefaultpowerfield.Bydefault,thepowerlevelis100%.Therefore,evenifyou

enabletheautomaticpower,thepoweroftheRFsignalwi ll notdecrease.

Thepow

erlevelisapercentageofthemaximumtransmissionpowerfortheRF

signal.

APSDMode SelectEnabletoenable AutomaticPowerSaveDelivery(APSD),whichisapower

managementmethod.APSDisrecommendedifVoIPphonesaccessthenetwork

throughtheAP.

Table353:RadioSettings(Cont.)

Field Description

D-Link DWS-4026 Руководство пользователя. Версия 2.0 онлайн [601/741] 172936

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