Chapter 7 Wireless
NWA / WAC Series User’s Guide
94
Connections are kicked based on either idle timeout or signal strength. The NWA/WAC first looks to see
which devices have been idle the longest, then starts kicking them in order of highest idle time. If no
connections are idle, the next criteria the NWA/WAC analyzes is signal strength. Devices with the
weakest signal strength are kicked first.
7.5 DCS
Use this screen to configure dynamic radio channel selection. Click Configuration > Wireless > DCS to
access this screen.
Figure 57 Configuration > Wireless > DCS
Each field is described in the following table.
7.6 Technical Reference
The following section contains additional technical information about the features described in this
chapter.
Dynamic Channel Selection
When numerous APs broadcast within a given area, they introduce the possibility of heightened radio
interference, especially if some or all of them are broadcasting on the same radio channel. If the
interference becomes too great, then the network administrator must open his AP configuration options
and manually change the channel to one that no other AP is using (or at least a channel that has a
lower level of interference) in order to give the connected stations a minimum degree of interference.
Dynamic channel selection frees the network administrator from this task by letting the AP do it
automatically. The AP can scan the area around it looking for the channel with the least amount of
interference.
In the 2.4 GHz spectrum, each channel from 1 to 13 is broken up into discrete 22 MHz segments that are
spaced 5 MHz apart. Channel 1 is centered on 2.412 GHz while channel 13 is centered on 2.472 GHz.
Table 41 Configuration > Wireless > DCS
LABEL DESCRIPTION
Select Now Click this to have the NWA/WAC scan for and select an available channel immediately.
Apply Click Apply to save your changes back to the NWA/WAC.
Reset Click Reset to return the screen to its last-saved settings.
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