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as guard interval, the AP router will choose short guard

interval (increasing the wireless performance) or long

guard interval for data transmit based on the station

capability.

Aggregation MSDU

Aggregation MSDU can

combine frames with different

sizes.

It is used for improving MAC layer’s performance

for some brand’s clients. The default setting is

Enable.

3.6.6 WMM Configuration

WMM is an abbreviation of Wi-Fi Multimedia. It defines the priority levels for four access

categories derived from 802.1d (prioritization tabs). The categories are designed with specific

types of traffic, voice, video, best effort and low priority data. There are four accessing

categories - AC_BE , AC_BK, AC_VI and AC_VO for WMM.

APSD (automatic power-save delivery) is an enhancement over the power-save mechanisms

supported by Wi-Fi networks. It allows devices to take more time in sleeping state and

consume less power to improve the performance by minimizing transmission latency. Such

function is designed for mobile and cordless phones that support VoIP mostly.

WMM Capable

To apply WMM parameters for wireless data transmission,

please click the

Enable

radio button.

APSD Capable

The default setting is

Disable

.

Aifsn

It controls how long the client waits for each data

transmission. Please specify the value ranging from 1 to 15.

Such parameter will influence the time delay for WMM

accessing categories. For the service of voice or video

image, please set small value for AC_VI and AC_VO

categories For the service of e-mail or web browsing,

please set large value for AC_BE and AC_BK categories.

CWMin/CWMax

CWMin

means contention Window-Min and

CWMax

means contention Window-Max. Please specify the value

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ranging from 1 to 15. Be aware that CWMax value must be

greater than CWMin or equals to CWMin value. Both

values will influence the time delay for WMM accessing

categories. The difference between AC_VI and AC_VO

categories must be smaller; however, the difference

between AC_BE and AC_BK categories must be greater.

Txop

It means transmission opportunity. For WMM categories

of AC_VI and AC_VO that need higher priorities in data

transmission, please set greater value for them to get

highest transmission opportunity. Specify the value

ranging from 0 to 65535.

ACM

It is an abbreviation of Admission control Mandatory. It

can restrict stations from using specific category class if it

is checked.

Note:

Vigor2820 provides standard WMM configuration

in the web page. If you want to modify the parameters,

please refer to the Wi-Fi WMM standard specification.

AckPolicy

“

Uncheck” (default value) the box means the AP router

will answer the response request while transmitting WMM

packets through wireless connection. It can assure that the

peer must receive the WMM packets.

“Check” the box means the AP router will not answer any

response request for the transmitting packets. It will have

better performance with lower reliability.

3.6.7 Station List

Station List

provides the knowledge of connecting wireless clients now along with its status

code. There is a code summary below for explanation. For convenient

Access Control

, you

can select a WLAN station and click

Add to Access Control

below.

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Refresh

Click this button to refresh the status of station list.

Add

Click this button to add current typed MAC address into

Access Contro

l.

3.7 System Maintenance

For the system setup, there are several items that you have to know the way of configuration:

Status, Administrator Password, Configuration Backup, Syslog, Time setup, Reboot System,

Firmware Upgrade.

Below shows the menu items for System Maintenance.

3.7.1 System Status

The

System Status

provides basic network settings of Vigor router. It includes LAN and

WAN interface information. Also, you could get the current running firmware version or

firmware related information from this presentation.

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Model Name

Display the model name of the router.

Firmware Version

Display the firmware version of the router.

Build Date/Time

Display the date and time of the current firmware build.

LAN-------

MAC Address

Display the MAC address of the LAN Interface.

1

st

IP Address

Display the IP address of the LAN interface.

1

st

Subnet Mask

Display the subnet mask address of the LAN interface.

DHCP Server

Display the current status of DHCP server of the LAN

interface.

DNS

Display the assigned IP address of the primary DNS.

WAN-------

Link Status

Display current connection status.

MAC Address

Display the MAC address of the WAN Interface.

Connection

Display the connection type.

IP Address

Display the IP address of the WAN interface.

Default Gateway

Display the assigned IP address of the default gateway.

Wireless LAN-------

MAC Address

Display the MAC address of the wireless LAN.

Frequency Domain

It can be Europe (13 usable channels), USA (11 usable

channels) etc. The available channels supported by the

wireless products in different countries are various.

Firmware Version

It indicates information about equipped WLAN miniPCi

card. This also helps to provide availability of some

features that are bound with some WLAN miniPCi.

SSID

Display the SSID of the router.

3.7.2 User Password

This page allows you to set new password for user operation.

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Old Password

Type in the old password. The factory default setting for

password is blank.

New Password

Type in new password in this field.

Confirm Password

Type in the new password again.

When you click OK, the login window will appear. Please use the new password to access into

the web configurator again.

3.7.3 Time and Date

It allows you to specify where the time of the router should be inquired from.

Current System Time

Click

Inquire Time

to get the current time.

Use Browser Time

Select this option to use the browser time from the remote

administrator PC host as router’s system time.

Use Internet Time

Select to inquire time information from Time Server on the

Internet using assigned protocol.

Time Protocol

Select a time protocol.

Server IP Address

Type the IP address of the time server.

Time Zone

Select the time zone where the router is located.

Enable Daylight Saving

Check the box to activate daylight saving function. Such

feature is useful for some areas.

Automatically Update Interval

Select a time interval for updating from the NTP server.

Click

OK

to save these settings.