ZyXEL Communications NWA5120 Series User Manual page 61

Table 28 Configuration > Wireless > DCS (continued)
LABEL
DCS Sensitivity
Level
Enable DCS Client
Aware
2.4 GHz Channel
Selection Method
2.4 GHz Channel
Deployment
Enable 5 GHz DFS
Aware
5 GHz Channel
Selection Method
Apply
Reset
NWA5120 Series User's Guide
DESCRIPTION
Select the AP's sensitivity level toward other channels. Options are High, Medium, and
Low.
Generally, as long as the area in which your AP is located has minimal interference from
other devices you can set the DCS Sensitivity Level to Low. This means that the AP
has a very broad tolerance.
If you are not sure about the number and location of any other devices in the region,
set the level to Medium. The AP's tolerance for interference is relatively narrow.
On the other hand, if you know there are numerous other devices in the region, you
should set the level to High to keep the interference to a minimum. In this case, the
NWA's tolerance for interference is quite strict.
Note: Generally speaking, the higher the sensitivity level, the more frequently the AP
switches channels. As a consequence, anyone connected to the AP will
experience more frequent disconnects and reconnects unless you select Enable
DCS Client Aware.
Select this to have the AP wait until all connected clients have disconnected before
switching channels.
If you disable this then the AP switches channels immediately regardless of any client
connections. In this instance, clients that are connected to the AP when it switches
channels are dropped.
Select how you want to specify the channels the NWA switches between for 2.4 GHz
operation.
Select auto to have the NWA display a 2.4 GHz Channel Deployment field you can
use to limit channel switching to 3 or 4 channels.
Select manual to select the individual channels the NWA switches between. Select
channels from the Available channels list and use the right arrow button to move
them to the Channels selected list.
This is available when the 2.4 GHz Channel Selection Method is set to auto.
Select Three-Channel Deployment to limit channel switching to channels 1,6, and
11, the three channels that are sufficiently attenuated to have almost no impact on one
another. In other words, this allows you to minimize channel interference by limiting
channel-hopping to these three "safe" channels.
Select Four-Channel Deployment to limit channel switching to four channels.
Depending on the country domain, if the only allowable channels are 1-11 then the
NWA uses channels 1, 4, 7, 11 in this configuration; otherwise, the NWA uses channels
1, 5, 9, 13 in this configuration. Four channel deployment expands your pool of possible
channels while keeping the channel interference to a minimum.
Select this if your APs are operating in an area known to have RADAR devices. This
allows the device to downgrade its frequency to below 5 GHz in the event a RADAR
signal is detected, thus preventing it from interfering with that signal.
Enabling this forces the AP to select a non-DFS channel.
Select how you want to specify the channels the NWA switches between for 5 GHz
operation.
Select auto to have the NWA automatically select the best channel.
Select manual to select the individual channels the NWA switches between. Select
channels from the Available channels list and use the right arrow button to move
them to the Channels selected list.
Click Apply to save your changes back to the NWA.
Click Reset to return the screen to its last-saved settings.
Chapter 6 Wireless
61