Wireless Network Voice Readiness | dBm Range for Cisco IP Phones | Cisco Exam 300-425-ENWLSD

dBm Range for Cisco IP Phones

Question

A wireless engineer is utilizing the voice readiness tool in Cisco Prime for a customer that wants to deploy Cisco IP phones.

Which dBm range is the network inspected against?

Answers

Explanations

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A. B. C. D.

D.

The voice readiness tool in Cisco Prime is used to analyze the wireless network's readiness for supporting Voice over IP (VoIP) traffic, such as Cisco IP phones. The tool examines various factors that can impact voice quality, including signal strength, noise, and interference.

In order to ensure good voice quality, the network should be inspected against a specific range of signal strength, measured in dBm (decibel-milliwatts). This range should be appropriate for the specific environment and deployment scenario.

Option A: -78 to -65 dBm Option B: -72 to -67 dBm Option C: -85 to -65 dBm Option D: -85 to -67 dBm

Among the given options, the correct dBm range against which the network is inspected depends on the voice codec used by the IP phones and the specific requirements of the deployment scenario.

Typically, the recommended range for the signal strength of a wireless network supporting Cisco IP phones is -67 to -72 dBm. This range is considered optimal for most scenarios, as it provides a good balance between coverage and capacity.

Option B: -72 to -67 dBm is the closest to the recommended range and is likely the correct answer in this case. It provides a range of 5 dBm for the signal strength, which is considered acceptable for most deployment scenarios.

Option A: -78 to -65 dBm provides a range of 13 dBm, which may be too wide for most scenarios and could result in poor voice quality.

Option C: -85 to -65 dBm provides a very wide range of 20 dBm, which is likely too wide for any deployment scenario and would result in poor voice quality.

Option D: -85 to -67 dBm provides a range of 18 dBm, which is wider than the recommended range and may result in poor voice quality in some scenarios. However, it is still closer to the recommended range than option A and option C.