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WhataretworeasonstoimplementH·323gatekeepers?()
A.toeliminatetheneedforVoIPgateways
B.toscaleaVoIPinstallationwithmultiplegateways
C.toprovidecalladmissioncontrolandlimitthenumberofsimultaneouscallsonthenetwork
D.tomeettherequirementtocontrolH·323gatewaysonaLAN
E.toacceptcallrequestsandreducetheloadonthegateway
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