Discuss RUCKUS RCWA Exam Topic 6 Question 14

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

AUnder 75% utilization and --70 dBm minimum

BAbove 60% utilization and --69 dBm minimum

CUnder 50% utilization and --65 dBm minimum

DAbove 55% utilization and --60 dBm minimum

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

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22 comments · newest first

Hildegarde 2 days ago

I prefer option B. Above 60% is reasonable for VoIP.

Tonette 7 days ago

I think option A is the best choice. Under 75% keeps it stable.

Hoa 12 days ago

A is solid. We need good quality for VoIP calls.

Valda 17 days ago

I feel like B balances utilization and signal strength well.

Hortencia 23 days ago

D could work, but I prefer A for reliability.

Minna 28 days ago

C is too low. Under 50% might cause issues.

Aliza 1 month ago

I agree, but B seems reasonable too. Above 60% is decent.

Roxanne 1 month ago

I think option A is the best choice. Under 75% keeps it stable.

Lawana 1 month ago

Wait, -70 dBm? That seems too high for good quality!

Marcelle 2 months ago

D) sounds a bit off, not sure about that one.

Zena 2 months ago

C) seems too low for modern VoIP needs.

Shantay 2 months ago

I think B) is more realistic for busy networks.

Jess 2 months ago

A) is the standard for VoIP setups.

Doug 2 months ago

Not sure about those RSSI numbers, they seem a bit high.

Barrett 2 months ago

Definitely A) for optimal call quality.

Winfred 3 months ago

Surprised that anyone would suggest under 50% utilization!

Cherry 3 months ago

I disagree, B) seems more realistic for modern setups.

Bulah 3 months ago

A) is the best choice for VoIP performance.

Jordan 3 months 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.

Judy 3 months 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.

Gilma 4 months 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.

Erasmo 5 months ago

I think I remember something about keeping utilization under 75% for VoIP to ensure quality, so maybe A is correct?

RUCKUS RCWA Exam - Topic 6 Question 14 Discussion