ZyXEL Communications NWA-3160 - V3.70 Manual page 141

Table 26 Wireless: MBSSID
LABEL
Disable channel
switching for DFS
Super Mode
Channel ID
Disable DCS to
unlock
Short GI
A-MPDU
Aggregation
RTS/CTS Threshold
Fragmentation
Threshold
NWA-3160 Series User's Guide
DESCRIPTION
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.
(For NWA-3160 and NWA-3163 only)
Select this to improve data throughput on the WLAN by enabling
fast frame and packet bursting.
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 Scan instead.
This appears if the DCS feature is enabled.
Click this to disable DCS and select a channel ID manually.
Note: DCS is Disabled by default
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.
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.
Use RTS/CTS to reduce data collisions on the wireless network if
you have wireless 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.
The threshold (number of bytes) for the fragmentation boundary for
directed messages. It is the maximum data fragment size that can
be sent. Enter an even number between 256 and 2346.
Chapter 8 Wireless Screen
141