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RUCKUS RCWA Exam - Topic 6 Question 14 Discussion

When designing a WLAN for VoIP, what percentage of airtime utilization and RSSI threshold should be maintained?
C) Under 50% utilization and --65 dBm minimum
A) Under 75% utilization and --70 dBm minimum
B) Above 60% utilization and --69 dBm minimum
D) Above 55% utilization and --60 dBm minimum

RUCKUS RCWA Exam - Topic 6 Question 14 Discussion

Actual exam question for RUCKUS's RCWA exam
Question #: 14
Topic #: 6
[All RCWA Questions]

When designing a WLAN for VoIP, what percentage of airtime utilization and RSSI threshold should be maintained?

Show Suggested Answer Hide Answer
Suggested Answer: C

For Voice-over-Wi-Fi (VoWiFi) deployments, RUCKUS recommends maintaining airtime utilization under 50% and ensuring a minimum RSSI of --65 dBm at the edge of coverage areas to guarantee clear call quality and low latency.

According to RUCKUS One Online Help -- WLAN Design for Real-Time Applications and RUCKUS AI Documentation -- VoIP Quality Optimization, these thresholds ensure a Signal-to-Noise Ratio (SNR) above 25 dB, keeping jitter under 30 ms and packet loss below 1%.

RUCKUS SmartCast QoS automatically prioritizes voice packets (802.11e WMM Voice AC) to further protect call performance, but maintaining low channel congestion remains critical.

RUCKUS Analytics 3.5 User Guide -- Airtime and Voice Traffic Metrics emphasizes monitoring airtime utilization through dashboards to verify compliance with design thresholds.


RUCKUS One Online Help -- Designing for Voice over Wi-Fi (VoWiFi) Guidelines

RUCKUS Analytics 3.5 User Guide -- Airtime Utilization and Voice Quality Metrics

RUCKUS AI Documentation -- Real-Time Application Optimization and QoS Design

Contribute your Thoughts:

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Bulah
2 hours ago
A) is the best choice for VoIP performance.
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Jordan
5 days ago
I recall that for VoIP, the minimum RSSI should be around -70 dBm, which makes me think A could be the right choice again.
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Judy
10 days ago
I practiced a similar question where the utilization was recommended to be below 60%, so I’m leaning towards D, but I’m not completely confident.
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Gilma
16 days ago
I’m not entirely sure, but I feel like the RSSI threshold should be around -65 dBm for decent call quality, which might point to C.
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Erasmo
2 months ago
I think I remember something about keeping utilization under 75% for VoIP to ensure quality, so maybe A is correct?
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