06-04-2009 08:10 AM
One of the features in AirWave I love is centralize for wireless network management and troubleshooting. The wireless user problems seem always in either slow or can’t connect to the WLAN. When Helpdesk received this call, I always told them first to check the “signal quality”.
The signal quality graph scales from 1-100. In the diagnostics page, the ideal signal quality is >= 20. But what are these numbers mean? How does it correlate to Aruba Wireless?
06-04-2009 12:30 PM
in the table is the SNR from the Aruba controller. AWMS polls the
wlanStaRSSI oid from the controller which reports the SNR. That value
is displayed as the Signal Quality.
06-12-2009 01:52 PM
According to AirWave Users/Diagnostic the “Ideal Signal Quality” is >= 20. If signal quality is SNR, using SNR(dB) formula (V is RMS amplitude):
SNR(dB) = 20(log Vsignal/Vnoise) >= 20 or Vsignal >= 10 Vnoise
Is it strong enough for the Vsignal? I had a user using Guest account, when the signal quality drops to 20-30, she had intermittent problem with IPSEC tunnel. But if the signal quality is > 35 everything work.
07-10-2009 06:17 PM
We arrived at a low quality signal threshold of 20 as a result of testing here in-house. We acknowledge that the figure might not hold up in all situations, that the actual threshold is dependent upon the unique conditions of each site. We are looking into making that a user-modifiable setting so you can adjust it according to your situation and your needs.