ZyXEL Communications NWA-3163 & NWA-3166 User Manual

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Chapter 6 AP Controller Mode
NWA-3160 Series User’s Guide
106
Disable channel 
switching for DFS 
This field displays only when you select  802.11a or 802.11n/a 
in the 802.11 Radio Mode field. Select this if you do not want to 
use DFS  (Dynamic Frequency Selection).
DFS (dynamic frequency selection) allows an AP to detect other 
devices in the same channel. If there is another device using the 
same channel, the AP changes to a different channel, so that it 
can avoid interference with radar systems or other wireless 
networks.
Super Mode
(For NWA-3160 and NWA-3163)
Select this to improve data throughput on the WLAN by enabling 
fast frame and packet bursting.
Choose Channel ID
Set the operating frequency/channel depending on your 
particular region. 
To manually set the NWA to use a channel, select a channel from 
the drop-down list box. Click MAINTENANCE and then the 
Channel Usage tab to open the Channel Usage screen to make 
sure the channel is not already used by another AP or 
independent peer-to-peer wireless network. 
To have the NWA automatically select a channel, click Auto 
Selection
 instead. 
Disable DCS to unlock This appears if the DCS feature is enabled.
Click this to disable DCS and select a channel ID manually.
DCS is Disabled by default
If the NWA is configured in Controller AP mode, it is 
recommended that you enable Dynamic Channel Selection 
(DCS). This allows the NWA to select channels with less 
intereference for Managed APs.
Short GI 
This field is available only when 802.11n/g or 802.11n/a is 
selected as the 802.11 Radio Mode. Select Enable to use 
Short GI (Guard Interval). The guard interval is the gap 
introduced between data transmission from users in order to 
reduce interference. Reducing the GI increases data transfer 
rates but also increases interference. Increasing the GI reduces 
data transfer rates but also reduces interference.
A-MPDU Aggregation  This field is available only when 802.11n/g or 802.11n/a is 
selected as the 802.11 Radio Mode. Select Enable to allow the 
grouping of several A-MSDUs (Aggregate MAC Service Data 
Units) into one large A-MPDU (Aggregate MAC Protocol Data 
Unit). This function allows faster data transfer rates.
Table 17   Radio Edit Screen
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