单项选择题
What does a Cisco Unified Wireless IP Phone 7921G deployment require（）？
A.more access points than a data network
B.fewer access points than a data network
C.less SNR than a data network
D.specific relative access point placement
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相关考题
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单项选择题
WhichantennagenerallyhasthenarrowestfirstFresnelzoneinboththehorizontalandverticalplanes？（）
A.omnidirectional
B.patch
C.Yagi
D.sector
E.parabolic dish -
多项选择题
WhichtwomethodscanbeusedtopreventorreduceRFIfromcolocateddirectionalantennas（）
A.Alternate polarization between colocated antennas
B.Cross-polarize antennas between endpoints
C.Install an RF-shielded box around the antennas
D.Increase the distance between the antennas -
单项选择题
Ciscorecommendsadecibelreferencedto1milliwattsignallevelforthecoveragecelledgeatthepredetermineddataratethatisneededtosupporttheVoWLANdeviceandcallcapacityrequirements.WhatisthatsignallevelvalueforCiscoUnifiedWirelessIPPhones7920，7921G，and7925G？（）
A.-65 dBm
B.-67 dBm
C.-69 dBm
D.-70 dBm
