D-Link DWC-1000 User Manual page 69

Wireless Controller
RF S can Other Channel s : Th e acces s p oin t can p erform RF s can s t o co llect
in fo rmat io n ab o u t o t her wireles s d ev ices wit h in ran g e an d t h en rep o rt t h is
in fo rmat io n t o t h e DW C-1000 wireles s co n t ro ller. If y o u s elect t h e Scan
Ot h er Ch an n els o p t io n , t h e rad io p erio d ically mo v es away fro m
t h e o p erat ion al ch ann el t o s can o t h er ch an n els . En ab lin g t h is mo d e cau s es
t h e rad io t o in t erru p t u s er t raffic, wh ich may b e n o t iceab le w it h v o ice
co n n ectio ns. W h en t he Scan Ot h er Ch an nels o p tio n is cleared , t he A P s can s
o n ly t h e o p erat in g ch an n el.
RF S can S entry: Select t h is o p t io n t o allo w t h e rad io t o o p erat e in s en t ry
mo d e. W h en t h e RF Scan Sen t ry o p t io n is s elect ed , t h e rad io p rimarily
p erfo rms d ed icat ed RF s can nin g. Th e rad io p assiv ely lis t ens fo r b eacons and
t raffic exch an g e b et ween clien t s and o t her access p oin ts b u t d o es n o t accep t
co n n ect io n s fro m wireles s clien t s . In s en t ry mo d e, all VA Ps are d is ab led .
Net wo rks t h at d eplo y s entry A Ps o r rad io s can d etect d ev ices o n t h e n etwork
q u icker an d p erfo rm mo re t h ro u gh s ecurit y an alysis . In t h is mo d e, t h e rad io
co n t ro llers fro m o n e ch an nel t o t h e n ext . Th e len g t h o f t ime s p en t o n each
ch an n el is co n trolled b y t h e s can d u rat io n . Th e d efau lt s can d u rat io n is 10
millis eco n d s .
Mode : Th e M o d e d efin es t h e Ph ysical Lay er (PHY) s t an dard t h e rad io u s es .
Select o n e o f t h e fo llo win g mo d es fo r each rad io in t erface.
Radi o 1 s upports :
• IEEE 802.11a is a PHY s t an dard t h at s pecifies o peratin g in t h e 5 GHz
U-NII b an d u s ing o rt hog onal freq u en cy d iv isio n mu lt ip lexin g (OFDM ).
It s u p p o rt s d at a rat es ran g in g fro m 6 t o 54 M b p s .
• IEEE 802.11a/ n o p erat es in t h e 5 GHz ISM b an d an d in clu des su ppo rt
fo r b o t h 802.11a an d 802.11n d ev ices . IEEE 802.11n is an ext en s io n o f
t h e 802.11 s t an d ard t h at in clu d es mu lt ip le -in p u t mu lt ip le -o u t p u t
(M IM O) t ech n o lo g y . IEEE 802.11n s u p p o rt s d at a ran g es o f u p t o 248
M b p s an d n early t wice t h e in d o o r ran g e o f 802.11 b , 802.11g , an d
802.11a.
• 5 GHz IEEE 802.11n is t h e reco mmen d ed mo d e fo r n et wo rks wit h
802.11n d ev ices t hat o p erat e in t h e 5 GHz freq u en cy t h at d o n ot n eed to
s u p p o rt 802.11a o r 802.11b / g d ev ices . IEEE 802.11n can ach iev e a
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