Chapter 19 AP Profile
NXC Series User’s Guide
263
Enable 5 GHz DFS
Aware
This field is available only when you select 11a, 11n,11ac, or ax in the 802.11 Band field and
set 5 GHz Channel Selection Method to auto.
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.
5 GHz Channel
Selection Method
Select auto to allow the AP to search for available channels automatically in the 5 GHz
band.
Select manual and specify the channels the AP uses in the 5 GHz band.
Note: The method is automatically set to auto when no channel is selected or
any one of the previously selected channels is not supported.
Channel ID This field is available only when you set Channel Selection to DCS and set 5 GHz Channel
Selection Method to manual.
Select the check boxes of the channels that you want the AP to use.
Time Interval Select this option to have the AP survey the other APs within its broadcast radius at the end
of the specified time interval.
DCS Time Interval This field is available when you set Channel Selection to DCS and select the Time Interval
option.
Enter a number of minutes. This regulates how often the AP surveys the other APs within its
broadcast radius. If the channel on which it is currently broadcasting suddenly comes into
use by another AP, the AP will then dynamically select the next available clean channel or
a channel with lower interference.
Schedule Select this option to have the AP survey the other APs within its broadcast radius at a
specific time on selected days of the week.
Start Time Specify the time of the day (in 24-hour format) to have the AP use DCS to automatically
scan and find a less-used channel.
Week Days Select each day of the week to have the AP use DCS to automatically scan and find a less-
used channel.
Advanced Settings
Country Code Select the country where the NXC is located/installed.
The available channels vary depending on the country you selected. Be sure to select the
correct/same country for both radios on an AP and all connected APs, in order to prevent
roaming failure and interference to other systems.
Guard Interval This field is available only when the channel width is 20/40MHz or 20/40/80MHz and the
802.11 Mode is either b, g, n, or ac. It is set to auto when 802.11 Mode is set to ax and does
not appear in the screen.
Set the guard interval for this radio profile to either Short or Long.
The guard interval is the gap introduced between data transmission from users in order to
reduce interference. Reducing the interval increases data transfer rates but also increases
interference. Increasing the interval reduces data transfer rates but also reduces
interference.
Enable A-MPDU
Aggregation
Select this to enable A-MPDU aggregation.
Message Protocol Data Unit (MPDU) aggregation collects Ethernet frames along with their
802.11n headers and wraps them in a 802.11n MAC header. This method is useful for
increasing bandwidth throughput in environments that are prone to high error rates.
A-MPDU Limit Enter the maximum frame size to be aggregated.
Table 123 Configuration > Object > AP Profile > Add/Edit Radio Profile (continued)
LABEL DESCRIPTION
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