Chapter 6 Wireless LAN

Table 12 Wireless LAN > Wireless Settings: Wireless Client (continued)

LABEL

DESCRIPTION

SSID Profile

The SSID (Service Set IDentifier) identifies the Service Set with which a wireless station is

 

associated. Wireless stations associating to the access point (AP) must have the same

 

SSID.

 

In this field, select the SSID profile of the AP you want to use. Click Apply.

 

The SSID used in the selected SSID profile automatically changes to be the one you select

 

in the Site Survey screen.

 

Set the security configuration for this operating mode in the Wireless LAN > Security

 

screen. Check the Dashboard screen to check if the settings you set show in the WLAN

 

information.

 

Note: If you are configuring the NWA1121-NI from a computer connected to the wireless LAN

 

and you change the NWA1121-NI’s SSID or security settings, you will lose your

 

wireless connection when you press Apply to confirm. You must then change the

 

wireless settings of your computer to match the NWA1121-NI’s new settings.

 

 

Channel

This shows the operating frequency/channel in use. This field is read-only when you select

 

Client as your operation mode.

 

 

Channel Width

A standard 20MHz channel offers transfer speeds of up to 150Mbps whereas a 40MHz

 

channel uses two standard channels and offers speeds of up to 300Mbps. However, not all

 

devices support 40MHz channels.

 

Select the channel bandwidth you want to use for your wireless network.

 

It is recommended that you select 20/40MHz. This allows the NWA1121-NI to adjust the

 

channel bandwidth depending on network conditions.

 

Select 20MHz if you want to lessen radio interference with other wireless devices in your

 

neighborhood or the AP do not support channel bonding.

 

 

Advanced Settings

Output Power

Set the output power of the NWA1121-NI in this field. If there is a high density of APs in an

 

area, decrease the output power of the NWA1121-NI to reduce interference with other APs.

 

Select one of the following Full (Full Power), 50%, 25% or 12.5%. See the product

 

specifications for more information on your NWA1121-NI’s output power.

 

 

Preamble Type

Select Dynamic to have the NWA1121-NI automatically use short preamble when the

 

wireless network your NWA1121-NI is connected to supports it, otherwise the NWA1121-NI

 

uses long preamble.

 

Select Long preamble if you are unsure what preamble mode the wireless device your

 

NWA1121-NI is connected to supports, and to provide more reliable communications in

 

busy wireless networks.

 

 

RTS/CTS

(Request To Send) The threshold (number of bytes) for enabling RTS/CTS handshake. Data

Threshold

with its frame size larger than this value will perform the RTS/CTS handshake. Setting this

 

attribute to be larger than the maximum MSDU (MAC service data unit) size turns off the

 

RTS/CTS handshake. Setting this attribute to its smallest value (1) turns on the RTS/CTS

 

handshake.

 

 

Fragmentation

The threshold (number of bytes) for the fragmentation boundary for directed messages. It

 

is the maximum data fragment size that can be sent.

 

 

Extension

You can use CTS to self or RTS-CTSprotection mechanism to reduce conflicts with other

channel

wireless networks or hidden wireless clients. The throughput of RTS-CTSis much lower

protection mode

than CTS to self. Using this mode may decrease your wireless performance.

 

 

A-MPDU

Select 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.

 

 

68

 

NWA1121-NI User’s Guide