Ciscorecommendsadecibelreferencedto1milliwattsignallevelforthecoveragecelledgeatthepredetermineddataratethatisneededtosupporttheVoWLANdeviceandcallcapacityrequirements.WhatisthatsignallevelvalueforCiscoUnifiedWirelessIPPhones7920,7921G,and7925G?()
A. -65dBm
B. -67dBm
C. -69dBm
D. -70dBm