What is the recommended radius of a cell for a voice-ready wireless network?
A.
6 dBm
B.
19 dBm
C.
5 dBm
D.
-67 dBm
Explanation:
At the edge of each voice cell, the received signal strength indication (RSSI) measurement should
115 Cisco 642-874 Exam
be -67 dBm if you are using a Cisco Unified Wireless IP Phone 7921G. It is recommended that you have RSSI above 35 at the edge of the cell, which is equivalent to -67dBm for optimum preformance on the phone.
Each cell in the network should overlap with the adjacent cells in order to facilitate uninterrupted handoff as a client moves between cells and to provide a minimum service even in case of access point failure. For a typical voice deployment, Cisco recommends a 15 to 20 percent overlap of a given access point’s cell from each of the adjoining cells