Linksys WAG200G Mode D'emploi page 31

Wireless-G ADSL Home Gateway
The Advanced Wireless Settings Tab
Advanced Wireless
On this screen you can access the advanced wireless features, including Authentication Type, Control TX Rate,
Beacon Interval, DTIM Interval, Fragmentation Threshold, and RTS Threshold.
• Authentication Type. The default is set to Auto, which allows either Open System or Shared Key
authentication to be used. For Open System authentication, the sender and the recipient do not use a WEP
key for authentication but can use WEP for data encryption. To only allow Open System authentication, select
Open System. For Shared Key authentication, the sender and recipient use a WEP key for both authentication
and data encryption. To only allow Shared Key authentication, select Shared Key. It is recommended that this
option be left in the default (Auto) mode, because some clients cannot be configured for Shared Key.
• Control Tx Rates The default transmission rate is Auto. The rate should be set depending on the speed of your
wireless network. Select from a range of transmission speeds, or keep the default setting, Auto, to have the
Gateway automatically use the fastest possible data rate and enable the Auto-Fallback feature. Auto-Fallback
will negotiate the best possible connection speed between the Gateway and a wireless client.
• Beacon Interval. The default value is 100. The Beacon Interval value indicates the frequency interval of the
beacon. A beacon is a packet broadcast by the Gateway to synchronize the wireless network.
• DTIM Interval. The default value is 1. This value indicates the interval of the Delivery Traffic Indication
Message (DTIM). A DTIM field is a countdown field informing clients of the next window for listening to
broadcast and multicast messages. When the Gateway has buffered broadcast or multicast messages for
associated clients, it sends the next DTIM with a DTIM Interval value. Its clients hear the beacons and awaken
to receive the broadcast and multicast messages.
• Fragmentation Threshold. This value should remain at its default setting of 2346. It specifies the maximum
size for a packet before data is fragmented into multiple packets. If you experience a high packet error rate,
you may slightly increase the Fragmentation Threshold. Setting the Fragmentation Threshold too low may
result in poor network performance. Only minor modifications of this value are recommended.
• RTS Threshold. This value should remain at its default setting of 2347. If you encounter inconsistent data
flow, only minor modifications are recommended. If a network packet is smaller than the preset RTS
threshold size, the RTS/CTS mechanism will not be enabled. The Gateway sends Request to Send (RTS)
frames to a particular receiving station and negotiates the sending of a data frame. After receiving an RTS, the
wireless station responds with a Clear to Send (CTS) frame to acknowledge the right to begin transmission.
When finished making your changes on this tab, click the Save Settings button to save these changes, or click
the Cancel Changes button to undo your changes.
Chapter 5: Configuring the Wireless-G ADSL Home Gateway
The Wireless Tab
Figure 5-20: Advanced Wireless Settings
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