Wireless Services - EnGenius EWS Series User Manual

Wireless Services

Background Scanning
With Background Scanning enabled, the controller periodically samples RF activity of all Access Points
including channel utilization and surrounding devices in all available channels. Background scanning is
the basis of Auto Channel, Auto Tx Power and Rogue AP detection, and must be enabled for these
features to operate. You may, if you prefer, disable it if you feel it's not helpful, or adjust the scanning
frequency, if you want scans at greater or fewer intervals.
Note: For latency-sensitive applications such as VoIP, it is recommended to set the background scan
interval to a higher value, e.g. 5 or 10 minutes. For regular application, the recommended value is 30
seconds. This value will also be directly related on how long it takes for the AP to scan for rogue devices.
Auto TX Power
Using the information collected by Background Scanning, APs can automatically adjust their transmit
power to optimize coverage. When enabled, APs will optimize their transmit power based on the time
interval configured for Background Scanning.
Note: Background Scanning must be enabled and Tx Power of APs must be set to Auto (under Wireless
Radio Settings) for this feature to operate.
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