Silex technology AP-500AC, User Manual

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2. About AP-500AC
17
DFS
AP-500AC supports DFS (Dynamic Frequency Selection) of the IEEE 802.11h wireless
standard. When radar signals are detected, the channel will automatically be switched to
avoid interference with radar systems (e.g. weather radar, etc).
DFS Channels (5GHz band)
- AP-500AC checks if there are radar signals on the DFS channels when it is powered on.
During this time, no wireless communication is allowed to AP-500AC.
- If radar signals are detected during or after AP-500AC is powered on, the channel needs to
be changed in order to avoid wireless interference. Therefore, if DFS channels are selected,
the channel could be changed automatically.
- The radar signals are monitored for a certain amount of time (*) after it is detected, while
wireless communication is disabled on AP-500AC then. Once radar signals are detected,
the channel will not be available for 30 mins. (* This time period differs depending on the
country.)
One alternative channel can individually be set for W53/W56 channels beforehand, which
will be used when radar signals are detected and the channel needs to be switched.
When alternative channels are not specified or radar signals are detected even for that
channel, AP-500AC switches the channel in order of the following:
TIP
W53 HT20/VHT20 52 > 56 > 60 > 64 > 36
HT40/VHT40 + 52 > 60 > 36
- 56 > 64 > 40
VHT80 36
W56 HT20/VHT20 100 > 104 > 108 > 112 > 116 > 120 > 124 > 128 > 132 > 136 > 140
HT40/VHT40 + 100 > 108 > 116 > 124 > 132
- 104 > 112 > 120 > 128 > 136
VHT80 100 > 116, 104 > 120, 108 > 124, 112 > 128, 116 > 100, 120 > 104, 124 > 108, 128 > 112