Intellinet 523875 User Manual page 17

"Hidden Node" problem, a situation in which two stations are within
range of the same access point but not within range of each other
(and are thus "hidden" from each other). When a station starts to send
data to the access point, it might not notice that the other station is
already using the wireless medium. When these two stations send
data at the same time, the transmissions might collide when arriving
simultaneously at the access point, with the collision most certainly
resulting in a loss of messages for both stations. When enabling RTS
Threshold on a suspect "hidden station," this station and its access
point will use a request to send (RTS — also known as "ready to
send"), in which the station informs the access point that it is going
to transmit the data. Upon receipt, the access point will respond with
a clear to send (CTS) message to all stations within its range to notify
all other stations to defer transmission. It will also confirm to the
requesting station that the access point has reserved it for the
timeframe of the requested transmission.
• Beacon interval: This is the time between beacon transmissions.
Before a station enters Power Save mode, the station needs the
beacon interval to know when to wake up to receive the beacon (and
learn whether there are buffered frames at the access point).
• inactivity Time: The default setting is 30,000 ms.
• data rate: By default, the unit adaptively selects the highest possible
rate for transmission. Select the basic rates to be used among the
following options: "Auto," "1," "2," "5.5," "11" or "54 Mbps." For most
networks, the default setting is "Auto," which is the best choice. When
set to "Auto," the transmission rate will select the optimal rate. If
obstacles or interference is present, the system will automatically
fall back to a lower rate.
• preamble Type: A preamble is a signal in a wireless environment
used to synchronize the transmitting timing, including Synchronization
and Start frame delimiter. NOTE: If you want to change Preamble
Type to "Long" or "Short," check the setting of the access point.
• Broadcast SSid: With "Enabled" selected, this wireless access
point will broadcast its SSID to stations; when set to "Disabled," it
won't. If stations want to connect to this wireless AP, its SSID should
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