{"id":1069,"date":"2026-06-10T12:35:49","date_gmt":"2026-06-10T16:35:49","guid":{"rendered":"https:\/\/baidengroup.ca\/baidengroup-ca-b\/?p=1069"},"modified":"2026-06-10T15:11:24","modified_gmt":"2026-06-10T19:11:24","slug":"enterprise-wifi-rssi-snr-explained","status":"publish","type":"post","link":"https:\/\/baidengroup.ca\/baidengroup-ca-b\/enterprise-wifi-rssi-snr-explained\/","title":{"rendered":"Understanding RSSI, SNR and What They Mean for Your Enterprise Wi-Fi"},"content":{"rendered":"

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Category: Wi-Fi Fundamentals  |  6 min read  |  By Baiden Group<\/em><\/p>\n

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\n\n Wi-Fi Signal Strength Scale (RSSI)<\/text>\n \n \n \n \n \n \n \n -30 dBm<\/text>\n -55 dBm<\/text>\n -67 dBm<\/text>\n -75 dBm<\/text>\n -80 dBm<\/text>\n \n Excellent<\/text>\n Good<\/text>\n Minimum<\/text>\n Marginal<\/text>\n Poor<\/text>\n Illustration by Baiden Group Inc.<\/text>\n<\/svg>
RSSI signal strength scale for enterprise Wi-Fi environments. Illustration © Baiden Group Inc.<\/figcaption><\/figure>\n

RSSI and SNR<\/strong> are the two most important signal metrics in enterprise Wi-Fi, yet most IT managers have never seen a clear explanation of what they mean or what “good” looks like. If you’ve ever had a conversation with a Wi-Fi engineer about enterprise Wi-Fi network performance, you’ve likely heard these terms thrown around without much context.<\/p>\n

In this article, we break down both metrics, explain what good enterprise Wi-Fi RSSI and SNR targets look like, and show you how they directly impact the reliability of your wireless network.<\/p>\n\n

What Is RSSI?<\/h2>\n

RSSI (Received Signal Strength Indicator)<\/strong> is a measurement of how well a wireless device can hear a signal from an access point (AP). It’s expressed in decibel-milliwatts (dBm), a logarithmic scale where higher (less negative) numbers indicate a stronger signal.<\/p>\n\n\n\n\n\n\n\n\n\n
RSSI Value<\/th>\nSignal Quality<\/th>\nTypical Use Case<\/th>\n<\/tr>\n<\/thead>\n
-30 dBm<\/td>\nExcellent<\/td>\nDevice is very close to the AP<\/td>\n<\/tr>\n
-50 to -60 dBm<\/td>\nGood<\/td>\nReliable for voice, video, and data<\/td>\n<\/tr>\n
-67 dBm<\/td>\nMinimum for most enterprise apps<\/td>\nVoIP, real-time collaboration<\/td>\n<\/tr>\n
-70 to -75 dBm<\/td>\nMarginal<\/td>\nBasic browsing only<\/td>\n<\/tr>\n
-80 dBm and below<\/td>\nPoor<\/td>\nFrequent disconnects, unusable<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

For enterprise environments (hospitals, corporate offices, warehouses, and schools), a target of -65 dBm or better<\/strong> is generally recommended. Voice-over-Wi-Fi and real-time tools like Microsoft Teams or Zoom require -67 dBm minimum<\/strong>.<\/p>\n

The Common Misconception About RSSI<\/h3>\n

Many people assume that stronger signal always means better performance. This is not always true. A device can have a strong RSSI reading and still experience poor performance, and that’s where SNR comes in.<\/p>\n\n

What Is SNR?<\/h2>\n

SNR (Signal-to-Noise Ratio)<\/strong> measures the difference between your Wi-Fi signal strength and the background noise floor in the same frequency band. It’s expressed in decibels (dB), and unlike RSSI, a higher number is always better.<\/p>\n

\n SNR = Signal Strength (dBm) − Noise Floor (dBm)<\/strong>
\n Example: -65 dBm signal − -90 dBm noise floor = 25 dB SNR\n<\/p><\/blockquote>\n

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\n\n SNR: Signal vs. Noise Floor<\/text>\n \n \n \n \n -50<\/text>\n -60<\/text>\n -70<\/text>\n -80<\/text>\n -90<\/text>\n \n \n Signal: -65 dBm<\/text>\n \n \n \n Noise: -90 dBm<\/text>\n \n \n \n \n SNR<\/text>\n 25 dB<\/text>\n Illustration by Baiden Group Inc.<\/text>\n<\/svg>
SNR is the gap between your signal and the noise floor. A wider gap means clearer communication. Illustration © Baiden Group Inc.<\/figcaption><\/figure>\n
\n\n\n\n\n\n\n\n
SNR Value<\/th>\nPerformance<\/th>\n<\/tr>\n<\/thead>\n
40+ dB<\/td>\nExcellent, high throughput, low retransmissions<\/td>\n<\/tr>\n
25–40 dB<\/td>\nGood, suitable for most enterprise applications<\/td>\n<\/tr>\n
15–25 dB<\/td>\nMarginal, expect reduced speeds and higher error rates<\/td>\n<\/tr>\n
Below 15 dB<\/td>\nPoor, unreliable connectivity<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Why the Noise Floor Matters<\/h3>\n

Noise comes from many sources: neighbouring networks, Bluetooth devices, microwave ovens, DECT phones, and industrial equipment. In dense urban offices, an elevated noise floor can severely degrade Wi-Fi performance, even when RSSI looks acceptable. This is why RF site surveys<\/strong> measure both signal strength and interference together.<\/p>\n\n

RSSI vs. SNR: Which One Matters More?<\/h2>\n

Both metrics matter, but SNR is often the more actionable indicator of real-world performance:<\/p>\n