Chapter 8 Wireless Screen

 

Table 23 Wireless: Access Point

 

LABEL

DESCRIPTION

 

 

Disable channel

This field displays only when you select 802.11a or 802.11n/a in

 

 

switching for DFS

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 only)

 

 

 

Select this to improve data throughput on the WLAN by enabling fast

 

 

 

frame and packet bursting.

 

 

 

 

 

 

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

This appears if the DCS feature is enabled.

 

 

unlock

Click this to disable DCS and select a channel ID manually.

 

 

 

 

 

 

Note: DCS is Disabled by default

 

 

 

 

 

 

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

This field is available only when 802.11n/g or 802.11n/a is

 

 

Aggregation

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.

 

 

 

 

 

 

RTS/CTS

Use RTS/CTS to reduce data collisions on the wireless network if you

 

 

Threshold

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.

 

 

 

 

 

 

Fragmentation

The threshold (number of bytes) for the fragmentation boundary for

 

 

Threshold

directed messages. It is the maximum data fragment size that can be

 

 

 

sent. Enter an even number between 256 and 2346.

 

 

 

 

 

 

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NWA-3160 Series User’s Guide