D-Link DWL-3600AP User Manual

ModifyingRadioSettings
D-Link UnifiedAccessPointAdministrator’sGuide
November2011 Page62
UnifiedAccessPointAdministrator’sGuide
Protection Theprotectionfeaturecontainsrulestoguaranteethat802.11ntransmissionsdonot
causeinterferencewithlegacystationsorAPs.Bydefault,theseprotectionmechanisms
areenabled(Auto).Withprotectionenabled,protectionmechanismswillbeinvokedif
legacydevicesarewithinrangeoftheAP.Thiscausesmoreoverheadon
every
transmission,whichwillimpactperformance.However,thereisnoimpacton
performanceiftherearenolegacydeviceswithinrangeoftheAP.
Youcandisable(Off)theseprotectionmechanisms;however,when802.11nprotection
isoff,legacyclientsorAPswithinrangecanbeaffect edby802.11ntransmissions.The

802.11protectionfeatureisalsoavailablewhenthemodeis802.11b/g.When
protectionisenabledinthismode,itprotects802.11bclientsandAPsfrom802.11g
transmissions.
Note:ThissettingdoesnotaffecttheabilityoftheclienttoassociatewiththeAP.
BeaconInterval Beaconframesaretransmittedbyan
AP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).
Enteravaluefrom20to2000milliseconds.
DTIMPeriod SpecifyaDTIMperiodfrom1to255beacons.
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APawaitingpick‐up.
TheDTIMperiodyouspecifyindicateshowoftentheclientsservedbythisAPshould
checkforbuff ereddatastillon
theAPawaitingpickup.
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,clientswillcheck
onevery10thbeacon.
Fragmentation
Threshold
Specifyanumberbetween256
and2,346tosettheframesizethresholdinbytes.
Thefragmentationthresholdisawayoflimitingthesizeofpackets(frames)transmitted
overthenetwork.Ifapacketexceedsthefragmentationthresholdyouset,the
fragmentationfunctionisactivatedandthepack etissentasmultiple802.11frames.
If
thepacketbeingtransmittedisequaltoorlessthanthethreshold,fragmentationisnot
used.
Settingthethresholdtothelargestvalue(2,346bytes)effectivelydisables
fragmentation.FragmentationplaysnorolewhenAggregationisenabled.
Fragmentationinvolvesmoreoverheadbothbecauseoftheextraworkofdividingup
andreassemblingof
framesitrequires,andbecauseitincreasesmessagetrafficonthe
network.However,fragmentationcanhelpimprovenetworkperformanceandreliability
ifproperlyconfigured.
Sendingsmallerframes(byusinglowerfragmentationthreshold)mighthelpwithsome
interferenceproblems;forexample,withmicrowaveovens.
Bydefault,fragmentationisoff.Werecommendnot
usingfragmentationunlessyou
suspectradiointerference.Theadditionalheadersappliedtoeachfragmentincreasethe
overheadonthenetworkandcangreatlyreducethroug hput.
Table19:RadioSettings(Cont.)
Field Description

D-Link DWL-3600AP Specifications

General

Frequency band	2.4 GHz
Cabling technology	10/100/1000Base-T(X)
Networking standards	IEEE 802.11g, IEEE 802.11n, IEEE 802.3, IEEE 802.3ab, IEEE 802.3af, IEEE 802.3u
Ethernet LAN data rates	10, 100, 1000 Mbit/s
Maximum data transfer rate	300 Mbit/s
Quality of Service (QoS) support	Yes
Data transfer rate	1 Gbit/s
Wireless technology	802.11 b/g/n
Antennas quantity	2
Antenna gain level (max)	4.7 dBi
Internal	No
Certification	FCC, CE
LED indicators	LAN, Power, WLAN
Interface	RJ-45
WAN connection	Ethernet (RJ-45)
Security algorithms	128-bit WEP, 64-bit WEP, SSID, WPA, WPA2
Storage temperature (T-T)	-20 - 65 °C
Operating temperature (T-T)	0 - 40 °C
Storage relative humidity (H-H)	5 - 95 %
Operating relative humidity (H-H)	10 - 90 %
Power supply	8 W
Input current	2.5 A
AC input voltage	5 V

Weight and Dimensions

Weight	635 g
Dimensions (WxDxH)	203 x 203 x 48 mm