Cisco Cisco 5520 Wireless Controller Guía De Instalación
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Voice Over Wireless LAN (VoWLAN)
Troubleshooting Checklist
Troubleshooting Checklist
Published: June 4, 2010
Revised: June 4, 2010
Voice Over Wireless LAN (VoWLAN) Troubleshooting Checklist
The following is a checklist that is recommended when troubleshooting a Voice Over Wireless LAN
(VoWLAN). It also defines best practices and additional options that may need to be taken into
consideration.
(VoWLAN). It also defines best practices and additional options that may need to be taken into
consideration.
Table 1-1
VoWLAN checklist
Recommendation
Best
Practice
Practice
May
Consider
Consider
Done
Verify an AP can be seen from the phone at -67 dBm or
better in all areas to be covered. You also need to verify that
the AP sees the phone at -67 dBm or better in all areas as
well.
better in all areas to be covered. You also need to verify that
the AP sees the phone at -67 dBm or better in all areas as
well.
X
Ensure that the SNR is always 25 dB or higher in all areas
to provide coverage.
to provide coverage.
X
Verify that channel utilization is under 50%.
X
Configure voice WLAN to use the 802.11a band.
X
If using EAP authentication, ensure that fast roaming is
supported such as CCKM.
supported such as CCKM.
X
WMM should be allowed or required for the voice WLAN. X
Voice WLAN should be marked with Platinum QoS.
X
Platinum QoS profile should have the 802.1p bits set to 6.
X