Scan List

The Scan List feature acquires fresh scanning data and refreshes every few seconds. Roam the High Channel Load area and note that each channel (40, 149, 44) shows multiple separate APs (BSSID) within that same channel group (RSSI values differ by a small number of db), indicating co-channel interference.

Item	Description
1	3 APs with same SSID and different BSSID within the same channel (40), with only a small RSSI difference
2	3 APs with same SSID and different BSSID within the same channel (149), with same or small RSSI difference
3	5 APs with same SSID and different BSSID within the same channel (44), with same or small RSSI difference

Select the arrow next to the connected AP (the top line) to view additional parameters for that AP.

Scroll down in

Detailed Capabilities for BSSID

and expand

QBSS

, the AP’s measurements of specific quality metrics for the Basic Service Set. This is review in cases of suspected interference and congestions.

Item	Description
1	High channel load / utilization > 60% leads to packet retries and packet loss

Note that although the

Station Count

is 3 (a low number of connected stations for the AP), the

Channel Utilization

is a high, undesirable value of 70% (> 60%). With multiple APs configured on the same channel with similar power, the utilization (high channel load) is due to many packet retries by network or application protocols and packet loss, which congest the medium with redundant traffic. The voice traffic packet loss directly impacts VoIP application quality in that location.

To correct this, adjust the WLAN/AP vendor’s configuration related to its Adaptive Radio Resource Management to assign separate channels to nearby APs. Typically, reconfiguring radio management responsiveness to utilization parameters adjusts the adaptation automatically. If this is unsuccessful, manually reconfigure channel separation.

After corrective actions, re-run the

Scan List

feature. The channel utilization of the same AP returns to a normal level.

Re-run the Wireless Analyzer Voice Analysis feature in active mode after infrastructure configuration changes to confirm the new data indicates no warnings or packet loss. This screen shows a good link quality of > 4.

Item	Description
1	VoIP Link Quality > = 4 considered good

This pre-deployment VoIP analysis saves significant cost, effort, and time when deploying the VoIP solution in a production environment.