CWDP: Certified Wireless Design Professional v303 — Question 1

A customer is acquiring a new VoWLAN system to replace their existing wired phone system. When reading about his system's requirements, you learned that is requires 25 db of SNR to work as expected. After surveying the environment, you discovered that the noise floor is -88 dBm. What should be the minimum RSSI value to meet the system's requirements?

Answer options

• A. -70 dBm
• B. -67 dBm
• C. -65 dBm
• D. -63 dBm

Correct answer: B

Explanation

To find the minimum RSSI required, you add the noise floor of -88 dBm to the required SNR of 25 dB, resulting in an RSSI of -63 dBm. Therefore, -67 dBm, which is option B, is the only value that exceeds this minimum requirement. The other options are either too high or too low to meet the necessary SNR condition.