ZyXEL Communications Corporation NWA1121NI Manuel D’Utilisation

Chapter 6 Wireless LAN

NWA1121-NI User’s Guide

The following table describes the labels in this screen. 

Wireless LAN > Wireless Settings: MBSSID

Basic Settings

Wireless LAN 
Interface

Select the check box to turn on the wireless LAN on the NWA1121-NI.

Operation Mode

Select MBSSID from the drop-down list. 

Wireless Mode

Select 802.11b/g to allow both IEEE802.11b and IEEE802.11g compliant WLAN devices 
to associate with the NWA1121-NI. The transmission rate of your NWA1121-NI might be 
reduced.

Select 802.11b/g/n to allow IEEE802.11b, IEEE802.11g and IEEE802.11n compliant 
WLAN devices to associate with the NWA1121-NI. The transmission rate of the NWA1121-
NI might be reduced.

Select 802.11n to allow only IEEE802.11n compliant WLAN devices to associate with the 
NWA1121-NI. 

Channel

Select the operating frequency/channel depending on your particular region from the 
drop-down list box. 

Channel Width 

This field displays only when you select 802.11n or 802.11b/g/n in the Wireless Mode 
field. 

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.

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

or the wireless clients do not support channel bonding.

Select 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.

 You can have up to eight SSIDs active at the same time.

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.

#

This is the index number of each SSID profile.

Activve

Select the check box to enable an SSID profile. Otherwise, clear the check box.

Profile

Select an SSID Profile from the drop-down list box.

Advanced Settings

Beacon Interval

When a wirelessly network device sends a beacon, it includes with it a beacon interval. 
This specifies the time period before the device sends the beacon again. The interval tells 
receiving devices on the network how long they can wait in lowpower mode before waking 
up to handle the beacon. A high value helps save current consumption of the access point.

DTIM Interval

Delivery Traffic Indication Message (DTIM) is the time period after which broadcast and 
multicast packets are transmitted to mobile clients in the Active Power Management 
mode. A high DTIM value can cause clients to lose connectivity with the network. 

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.