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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. The range is 256-2346 bytes. It specifies the maximum size for a packet
before data is fragmented into multiple packets. If you experience a high pack-
et error rate, you may slightly decrease 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. The
range is 0-2347 bytes. Should 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 Router
sends Request to Send (RTS) frames to a particular receiving station and nego-
tiates 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.
Authentication Type. The default is set to Open System or Shared Key,
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. For Shared Key authentication, the sender and recipient
use a WEP key for authentication. If you want to use only Shared Key authen-
tication, then select Shared Key.
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.
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Wireless-G Cable Gateway
Advanced Wireless Settings
Advanced Wireless
On this screen you can access the Advanced Wireless features of Basic Data
Rates, Control Tx Rates, Beacon Interval, DTIM Interval, Fragmentation
Threshold, RTS Threshold, and Authentication Type. Note - these adveance set-
tings typically do not need to be modified.
Basic Data Rates. Select Min or All from the drop-down menu for rate.
Control Tx Rates. Select Min or All from the drop-down menu for the trans-
mission rate. All will negotiate the best possible connection speed between the
Router and a wireless client.
Beacon Interval. The default value is 100. Enter a value between 1 and 65,535
milliseconds. The Beacon Interval value indicates the frequency interval of the
beacon. A beacon is a packet broadcast by the Router to synchronize the wire-
less network.
DTIM Interval The default value is 3. This value, between 1 and 255 mil-
liseconds, 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 Router
has buffered broadcast or multicast messages for associated clients, it sends
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Figure 5-10