ZyXEL Communications NWA5121-N User Manual page 88

Table 43 Configuration > Object > AP Profile > Add/Edit Profile (continued)
LABEL DESCRIPTION
2.4 GHz Channel Select how you want to specify the channels the NWA/WAC switches between for 2.4
Selection Method
GHz operation. This field appears only when you choose 802.11b/g/n mode.
Select auto to have the NWA/WAC 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/WAC switches between.
Select channels from the Available channels list and use the right arrow button to
move them to the Channels selected list.
2.4 GHz Channel This is available when the 2.4 GHz Channel Selection Method is set to auto.
Deployment
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/WAC uses channels 1, 4, 7, 11 in this configuration; otherwise, the NWA/WAC
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.
Enable 5 GHz Select this if your APs are operating in an area known to have RADAR devices. This
DFS Aware
allows the devide to downgrade its frequency to below 5 GHz in the event 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 Select how you want to specify the channels the NWA/WAC switches between for 5 GHz
Selection Method
operation.
Select Auto to have the NWA/WAC automatically select the best channel.
Advanced Settings
Guard Interval Set the guard interval for this radio profile to either short or long. This option isn't
applicable if you choose 20 MHz channel width.
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 Select this to enable A-MPDU aggregation.
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.
Enable A-MSDU Select this to enable A-MSDU aggregation.
Aggregation
Mac Service Data Unit (MSDU) aggregation collects Ethernet frames without any of
their 802.11n headers and wraps the header-less payload in a single 802.11n MAC
header. This method is useful for increasing bandwidth throughput. It is also more
efficient than A-MPDU except in environments that are prone to high error rates.
RTS/CTS Use RTS/CTS to reduce data collisions on the wireless network if you have wireless
Threshold
clients that are associated with the same AP but out of range of one another. When
enabled, a wireless client sends an RTS (Request To Send) and then waits for a CTS
(Clear To Send) before it transmits. This stops wireless clients from transmitting
packets at the same time (and causing data collisions).
A wireless client sends an RTS for all packets larger than the number (of bytes) that
you enter here. Set the RTS/CTS equal to or higher than the fragmentation threshold to
turn RTS/CTS off.
Chapter 8 AP Profile
NWA5000 / WAC6500 Series User's Guide
88