Nortel Networks 2300 manual Tuning the Transmit Data Rate

294Configuring RF Auto-Tuning

A radio also can change its channel before the channel tuning interval expires to respond to RF anomalies. An RF anomaly is a sudden major change in the RF environment, such as sudden major interference on the channel.

By default, a radio cannot change its channel more often than every 900 seconds, regardless of the RF environment. This channel holddown avoids unnecessary changes due to very transient RF changes, such as activation of a microwave oven.

Tuning the Transmit Data Rate

A radio sends beacons, probe requests, and probe responses at the minimum transmit data rate allowed for clients. This gives them the maximum distance. All other packets are transmitted at a rate determined by their destination. All packets are transmitted at the same power level.

By default, the following minimum data rates are allowed:

•5.5 Mbps for 802.11b/g clients

•24 Mbps for 802.11a clients

As described in “Power Tuning” on page 293, a radio can lower the data rate with a client in order to improve the connection with that client.

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