32

6.2. Mode: WDS

Wireless Distribution System, a system that enables the wireless interconnection of

access point, allows a wireless network to be expended using multiple access points

without a wired backbone to like them. Each WDS APs need setting as same channel and

encryption type.

MAC address 1~4:

Please enter the MAC address of the neighboring APs that

participates in WDS, we support 4 devices now.

Set Security:

WDS Security depends on your AP security settings. Note: it does not

support

mixed mode

such as WPA-PSK/WPA2-PSK Mixed mode.

6.3. Advanced

This tab allows you to set the advanced wireless options. The options included are

Authentication Type, Fragment Threshold, RTS Threshold, Beacon Interval, and Preamble

Type. You should not change these parameters unless you know what effect the changes

will have on the router.

33

Fragment Threshold:

This specifies the maximum size of a packet during the

fragmentation of data to be transmitted. If you set this value too low, it will result in bad

performance.

RTS Threshold:

When the packet size is smaller than the RTS threshold, the wireless

router will not use the RTS/CTS mechanism to send this packet.

Beacon Interval:

is the interval of time that this wireless router broadcasts a beacon. A

Beacon is used to synchronize the wireless network.

DTIM Period:

Enter a value between 1 and 255 for the Delivery Traffic Indication

Message (DTIM). A DTIM is a countdown informing clients of the next window for

listening to broadcast and multicast messages

Data Rate:

The “Data Rate” is the rate that this access point uses to transmit data packets.

The access point will use the highest possible selected transmission rate to transmit

the data packets.

N Data Rate:

The “Data Rate” is the rate that this access point uses to transmit data

packets for N compliant wireless nodes. Highest to lowest data rate can be fixed.

Channel Bandwidth:

This is the range of frequencies that will be used.

Preamble Type:

The “Long Preamble” can provide better wireless LAN compatibility while

the “Short Preamble” can provide better wireless LAN performance.

CTS Protection:

It is recommended to enable the protection mechanism. This mechanism

can decrease the rate of data collision between 802.11b and 802.11g wireless

stations. When the protection mode is enabled, the throughput of the AP will be a little

lower due to a lot of frame-network that is transmitted.

TX Power:

This can be set to a bare minimum or maximum power.

34

6.4. Security

This Access Point provides complete wireless LAN security functions, included are

WEP, IEEE 802.1x, IEEE 802.1x with WEP, WPA with pre-shared key and WPA with

RADIUS. With these security functions, you can prevent your wireless LAN from illegal

access. Please make sure your wireless stations use the same security function, and are

setup with the same security key.

35

ESSID Selection:

This broadband router support multiple ESSID, you could select

and set up the wanted ESSID.

Broadcast ESSID:

If you enabled “Broadcast ESSID”, every wireless station located

within the coverage of this access point can discover this access point easily. If

you are building a public wireless network, enabling this feature is recommended.

Disabling “Broadcast ESSID” can provide better security.

WMM:

Wi-Fi MultiMedia if enabled supports QoS for experiencing better audio, video

and voice in applications.

Encryption:

When you choose to disable encryption, it is very insecure to operate

ESR9850.

Enable 802.1x Authentication

IEEE 802.1x is an authentication protocol. Every user must use a valid account to login to

this Access Point before accessing the wireless LAN. The authentication is processed by a

RADIUS server. This mode only authenticates users by IEEE 802.1x, but it does not

encrypt the data during communication.

36

WEP Encryption

When you select 64-bit or 128-bit WEP key, you have to enter WEP keys to encrypt data.

You can generate the key by yourself and enter it. You can enter four WEP keys and select

one of them as a default key. Then the router can receive any packets encrypted by one of

the four keys.

Authentication Type:

There are two authentication types:

"Open System"

and

"Shared

Key"

. When you select

"Open System"

, wireless stations can associate with this

wireless router without WEP encryption. When you select

"Shared Key"

, you should

also setup a WEP key in the

"Encryption"

page. After this has been done, make

sure the wireless clients that you want to connect to the device are also setup with the

same encryption key.

Key Length:

You can select the WEP key length for encryption, 64-bit or 128-bit. The

larger the key will be the higher level of security is used, but the throughput will be

lower.

Key Type:

You may select ASCII Characters (alphanumeric format) or Hexadecimal Digits

(in the "A-F", "a-f" and "0-9" range) to be the WEP Key.

Key1 - Key4:

The WEP keys are used to encrypt data transmitted in the wireless network.

Use the following rules to setup a WEP key on the device. 64-bit WEP: input 10-digits

Hex values (in the "A-F", "a-f" and "0-9" range) or 5-digit ASCII character as the

encryption keys.

128-bit WEP: input 26-digit Hex values (in the "A-F", "a-f" and "0-9" range) or 13-digit

ASCII characters as the encryption keys.

Click

<Apply>

at the bottom of the screen to save the above configurations. You can

now configure other sections by choosing Continue, or choose Apply to apply the settings

and reboot the device.

WPA Pre-Shared Key Encryption

Wi-Fi Protected Access (WPA) is an advanced security standard. You can use a