单项选择题
What will cause wireless voice devices to perform poorly？（）
A.average signal strength that is greater than -67 dBi
B.cell overlap of 15 to 20 percent
C.uneven wireless coverage
D.absence of coverage holes
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相关考题
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单项选择题
WhatdoesaCiscoUnifiedWirelessIPPhone7921Gdeploymentrequire（）？
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 -
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
