An engineer is performing a predictive wireless design for a medical treatment environment, which requires data and voice services. What is the minimum requirement for the design?
A.
overlapping גˆ’72 dBm coverage from two access points
B.
continuous גˆ’67 dBm coverage from one access point
C.
continuous גˆ’72 dBm coverage from one access point
D.
overlapping גˆ’67 dBm coverage from two access points
There will be a big area without overlap in the (center of the) cells. At those spots there is only one AP > -67 dBm needed.
Answer B is correct in my opinion.
D:Overlap
Check the site survey to determine whether the channel overlap is adequate for devices to roam to the next AP before the signal is lost from the previous AP.
For example, based on the RF guidelines specified in the Cisco 7925G Wireless IP Phone Deployment Guide, you must use non-overlapping channels and allow at least 20 percent overlap with adjacent channels when phones are deployed in the 802.11b/g environment.
For voice deployments, it is recommended that the cell edge be at -67 dBm with 20 percent overlap.
Answer is D:
"Remember, for voice services, the goal is to have at least two (2) APs heard at -67 dBm or greater at all times."
https://www.cisco.com/c/en/us/support/docs/wireless/5500-series-wireless-controllers/116057-site-survey-guidelines-wlan-00.html
Provided answer is correct, as it is asking for predictive site survey purposes so it requires a 67 dmb continuous setting.
upvoted 4 times
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