CWDP: Certified Wireless Design Professional v305 — Question 2

While planning for a VoWLAN deployment requiring 25 dB SNR, you measure the noise floor at -88 dBm. What is the minimum RSSI needed to meet the system’s performance requirements?

Answer options

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

Correct answer: C

Explanation

To achieve a 25 dB SNR with a noise floor of -88 dBm, the minimum required RSSI can be calculated by adding the SNR to the noise floor: -88 dBm + 25 dB = -63 dBm. However, the RSSI must be at least -65 dBm to ensure the performance requirements are met; therefore, option C (-65 dBM) is the correct answer, while the other options do not satisfy the requirement.