Specifications

Radio Interface
RoamAbout RBT-4102 Wireless Access Point Configuration Guide 4-61
faster.UsinghigherDTIMvaluesreducesthepowerusedbystationsinPowerSavemode,but
delaysthetransmissionofbroadcast/multicastframes.Range:1‐255beacons;Default:2
beacons
• FragmentLength(256‐2346)specifiesanalternativeframelengthforpackets.When
transmittingdataviathewirelessnetwork,yourwirelessnetworkautomatically
splitsupthe
fileormessageinanumberofdifferentpacketsthatarere‐assembledagainbythe
communicationpartner.EnterasysRoamAboutproductsusestandardIEEE802.11compatible
framelengths,wheredifferentlengthsapplyforeachTransmitRate.Fragmentationwillapply 
alternative(usuallyshorter)framelengthstosplitand
reassemblethewirelessdataframes.
Default:2346.
• RTSThreshold(0‐2347)setstheRequesttoSend(RTS)thresholdframelengthbetween0and
2,327bytes.YoucanconfiguretheaccesspointtoinitiateanRTSframesequencealways,
never,oronlyonframeslongerthanaspecifiedlength.Ifthe
packetsizeissmallerthanthe
presetRTSthresholdsize,theRTS/CTSmechanismwillNOTbeenabled.
Theaccesspointsendsrequesttosend(RTS)framestoaparticularreceivingstationto
negotiatethesendingofadataframe.AfterreceivinganRTS,thestationsendaCTS(Clearto
Send)
frametoacknowledgetherightforthestationtosenddataframes.
Theaccesspointcontendingforthemediummaynotbeawareofeachother.TheRTS/CTS 
mechanismcansolvethisʺHiddenNodeProblemʺ.
IftheRTSthresholdissetto0,theaccesspointneversendsRTSsignals.
Ifsetto2347,the
accesspointalwayssendsRTSsignals.Ifsettoanyothervalue,andthepacketsizeequalsor
exceedstheRTSthreshold,theRTS/CTS(RequesttoSend/CleartoSend)mechanismwillbe
enabled.Range:0‐2347bytes.Default:2347bytes