3Com WX4400 Reference Manual page 276

276 C 7: C
HAPTER ONFIGURING
W P
IRELESS ARAMETERS
Fragment Threshold—Frame length (256 to 2346 bytes) at which the
long-retry-count is applicable instead of the short-retry-count. The
default is 2,346 bytes.
Max. Tx MSDU Lifetime—Maximum amount of time, from 500 ms to
250,000 ms (250 seconds), the MAP can hold an outbound frame in
buffer storage. The default value is 2,000 ms (2 seconds).
Max. Rx MSDU Lifetime—Maximum amount of time, from 500 ms to
250,000 ms (250 seconds), the MAP can hold an inbound frame in
buffer storage. The default is 2000 ms (2 seconds).
RTS Threshold—Minimum length (0 to 2347 bytes) a frame can be for
the MAP to use the Request-To-Send/Clear-To-Send (RTS/CTS)
method to send the frame. Frames smaller than the RTS threshold are
not sent using the RTS/CTS method. The default is 2347 bytes.
Enable Long Preambles—Enables advertisement of long preambles for
802.11b/g radios. This option is enabled by default. This option
applies only to 802.11b/g radios.
Auto Tune Tab
The Auto Tune tab lists settings for RF Auto-Tuning:
Tune Channel—Automatically configures and tunes the channel. This
feature is enabled by default.
RF Auto-Tuning of channels on 802.11a radios uses only the bottom
eight channels in the band (36, 40, 44, 48, 52, 56, 60, and 64). To use a
higher channel number, you must disable RF Auto-Tuning of channels on
the radio profile the radio is in, and statically configure the channel.
Tune Transmit Power—Automatically configures and tunes the power.
This feature is disabled by default.
Channel Tuning Interval—Interval at which RF Auto-Tuning decides
whether to change the channels on radios in a radio profile.
At the end of each interval, MSS processes the results of the RF scans
performed during the previous interval, and changes radio channels if
needed.
You can specify from 0 to 65535 seconds. The default channel interval
is 3600 seconds. 3Com recommends that you use an interval of at
least 300 seconds (5 minutes). If you set the interval to 0,
RF Auto-Tuning does not reevaluate the channel at regular intervals.
However, RF Auto-Tuning can still change the channel in response to
RF anomalies.