300-360 · Question #246
When designing a VoWLAN network, what is the recommended cell overlap?
The correct answer is C. 15-20%. Voice over WLAN (VoWLAN) requires seamless roaming so that active calls are not dropped when a client transitions between access points. Cisco recommends a 15–20% cell overlap for VoWLAN deployments. This overlap ensures that a roaming device maintains a strong enough signal…
Question
When designing a VoWLAN network, what is the recommended cell overlap?
Options
- A5-10%
- B10-15%
- C15-20%
- D25-30%
How the community answered
(21 responses)- A5% (1)
- C90% (19)
- D5% (1)
Explanation
Voice over WLAN (VoWLAN) requires seamless roaming so that active calls are not dropped when a client transitions between access points. Cisco recommends a 15–20% cell overlap for VoWLAN deployments. This overlap ensures that a roaming device maintains a strong enough signal from the new AP before disconnecting from the old one, enabling fast and smooth Layer 2 handoffs. Less overlap (5–10% or 10–15%) risks coverage gaps during roaming, while more overlap (25–30%) wastes RF resources and increases co-channel interference.
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