Technical Reference; Dynamic Channel Selection - ZyXEL Communications NXC5200 User Manual

Chapter 10 Wireless
Table 61 Configuration > Wireless > DCS (continued)
LABEL
Enable DCS Client
Aware
2.4 GHz Channel
Deployment
Enable 5 GHz DFS
Aware
Apply
Reset

10.7 Technical Reference

The following section contains additional technical information about the features
described in this chapter.

10.7.1 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 interferrence) 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.
174
DESCRIPTION
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 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 NXC uses channels 1, 4, 7, 11 in this
configuration; otherwise, the NXC 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.
Click Apply to save your changes back to the NXC.
Click Reset to return the screen to its last-saved settings.
NXC5200 User's Guide