For Voice over IP (VoIP) over WLAN, seamless roaming is critical to maintain call quality. To achieve this:
D.Ensuring that at least two access points (APs) are visible with adequate signal strength from any location allows client devices to roam between APs without dropping the connection. This overlap facilitates smooth handoffs and maintains call continuity.
A.While measuring cell overlap is useful, the key is to design the network to provide the necessary overlap, not just measure it.
B.Increasing output power can lead to larger cells but may cause interference and reduce the number of available channels, which is counterproductive in dense environments.
C.Higher gain antennas focus the signal, which may not provide the desired omnidirectional coverage needed for consistent overlap.
[Reference:CWDP-305 Study Guide, Chapter on Advanced Site Surveys – VoIP Considerations., , ]
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