Chapter 9 Wireless
Table 43 Configuration > Wireless > DCS (continued)
LABEL | DESCRIPTION |
Enable | Select this if your APs are operating in an area known to have RADAR |
DFS Aware | 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 |
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Select how you want to specify the channels the | |
Selection Method | AP switches between for 5 GHz operation. |
| Select auto to have the |
| the best channel. |
| Select manual to select the individual channels the |
| series AP switches between. Select channels from the Available |
| channels list and use the right arrow button to move them to the |
| Channels selected list. |
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Apply | Click Apply to save your changes back to the |
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Reset | Click Reset to return the screen to its |
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9.7 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.
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