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300-360 · Question #45

The AP has been configured property for a VoWLAN survey. The RF environment contains a noise of -87 to -90 dBm. What is the target value for the cell edge reading?

The correct answer is A. -62 dBm. Guide/Enterprise_Mobility_8-1_Deployment_Guide/Chapter-9.html Cisco guidelines for deploying 802.11b/g/a VoWLAN handsets recommend a design where a minimum power of -67 dBm is present at the cell boundary (see Figure 9-10). This practice creates cell sizes that are smaller than…

WLAN Design

Question

The AP has been configured property for a VoWLAN survey. The RF environment contains a noise of -87 to -90 dBm. What is the target value for the cell edge reading?

Options

  • A-62 dBm
  • B-67 dBm
  • C-60 dBm
  • D-70 dBm

How the community answered

(23 responses)
  • A
    83% (19)
  • B
    4% (1)
  • C
    9% (2)
  • D
    4% (1)

Explanation

Guide/Enterprise_Mobility_8-1_Deployment_Guide/Chapter-9.html Cisco guidelines for deploying 802.11b/g/a VoWLAN handsets recommend a design where a minimum power of -67 dBm is present at the cell boundary (see Figure 9-10). This practice creates cell sizes that are smaller than those used in data WLAN designs of the past. The -67 dBm threshold is a general recommendation for achieving a packet error of one percent, which requires an SNR value of 25 dB or greater (local noise conditions impact this requirement).

Topics

#VoWLAN survey#cell edge#SNR#noise floor

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