User's Manual

RLX2 Industrial Hotspot Series
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ProSoftTechnology,Inc. Page195of208
February5,2015
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G
Gain
Theamountbywhichanantennaconcentratessignalstrengthinawirelessnetwork.
Gateway
Inwirelessterms,agatewayisanaccesspointwithadditionalsoftwarecapabilitiessuch
asprovidingNATandDHCP.
Guard Interval (GI)
Anintervaloftimebetweendatapackettransmissions.Theguardintervaltimefor
802.11a/b/gsystemsisfixedat800microseconds.802.11ndevicescanalsousea400
microsecondguardinterval,fallingbackto800microsecondsifexcessivedata
corruptionisdete
cted.
H
Half-Duplex
Acommunications circuitorsystemdesignedtotransmitandreceivedata,butnotboth
simultaneously.CBorwalkie‐talkieradiosareanexampleofahalf‐duplex
communicationsystem. Eitherpartiesonaradioconversationmaytalkorlisten;but
bothcannottalkatthesametimewithoutcorruptingeachother'ssignal.Ifone
operatoris"talking",th
eothermustbe"listening"tohavesuccessfulcommunication.
Hz
Hertz.Theinternationalunitformeasuringfrequencyequivalenttotheolderunitof
cyclespersecond.Onemegahertz(MHz)isonemillionhertz.Onegigahertz(GHz)isone
billionhertz.ThestandardUSelectricalpowerfrequencyis60Hz.802.11adevi ces
operateinthe5GHzband;802.11bandgdevicesoperateinthe2.
4GHzband.
I
IEEE
InstituteofElectricalandElectronicsEngineers,Inc.IEEEisaprofessionalorganization
withmembersinover175countriesandisanauthorityintechnicalareassuchas
computerengineeringandtelecommunications.IEEEdevelopedthe802.11
specifications.