Alvarion BreezeMAX Si 4000 CPE, User Manual

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Chapter 5 - Configuring WiFi Parameters WiFi Configuration
BreezeMAX Si 4000 CPE 57 User Manual
decreases the performance of 802.11g clients, but ensures that 802.11b
clients can communicate with the BreezeMAX Si 4000. (Default: Auto)
»
Always off : If there are no 802.11b clients in the network, the protection
mode can be disabled.
»
Always on : The transmitting client sends a CTS frame to prevent others
from accessing the medium. This mechanism is effective for most networks
with mixed 802.11g and 802.11b clients.
»
Auto : Both RTS and CTS frames must be exchanged before a client can
send data. There may be 802.11b clients in some networks that do not
detect the CTS frames from other stations. The full RTS/CTS exchange
should solve most connection problems, but it also has the greatest impact
on network performance.

Preamble Length – All IEEE 802.11 frames begin with an alternating pattern
of 1s and 0s called the preamble, which tells receiving stations that a frame is
arriving. This provides time for the receiving station to synchronize to the
incoming data stream. This parameter sets the length of the signal preamble
that is used at the start of a data transmission. Using a short preamble
instead of a long preamble can increase data throughput on the unit, but
requires that all clients can support a short preamble. (Default: Short
Preamble)
»
Short : Sets the preamble to short (96 microseconds) for increased
throughput.
»
Long : Sets the preamble to long (192 microseconds. Using a long preamble
ensures the unit can support all 802.11b and 802.11g clients.

SSID Suppress – The unit is configured by default as an “open system”, which
broadcasts a beacon signal including the configured SSID. Wireless clients
with a configured SSID of “ANY” can read the SSID from the beacon, and
automatically set their SSID for immediate connection to the BreezeMAX Si
4000. When enabled, the unit does not include its SSID in beacon messages.
This provides a basic level of security, since wireless clients must be
configured with the SSID to connect to the BreezeMAX Si 4000. (Default:
Disable)