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SonicOS 5.8.1 Administrator Guide
Step 8 The Association Timeout (seconds) is 300 seconds by default, and the allowed range is from
60 to 36000 seconds. If your network is very busy, you can increase the timeout by increasing
the number of seconds in the Association Timeout (seconds) field.
Step 9 Set the Maximum Client Associations to limit the number of stations that can connect
wirelessly at one time. The default is 128.
Step 10 Data Rate: Select the speed at which the data is transmitted and received. Best automatically
selects the best rate available in your area given interference and other factors. Or you can
manually select a data rate.
Step 11 Protection Mode: Protection can decrease collisions, particularly where you have two
overlapping SonicPoints. However, it can slow down performance. Auto is probably the best
setting, as it will engage only in the case of overlapping SonicPoints.
Step 12 Protection Rate: The protection rate determines the data rate when protection is on. The
slowest rate offers the greatest degree of protection but the slowest data transmission rate.
Choose 1 Mbps, 2 Mbps, 5 Mbps, or 11 Mbps.
Step 13 Protection Type: Select the type of handshake used to establish a wireless connection: CTS-
only or RTS-CTS. 802.11b traffic is only compatible with CTS.
Step 14 Click Apply in the top right corner of the page to apply your changes to the security appliance.
Click R
estore Default to return the radio settings to the default settings.
Configurable Antenna Diversity
The dual antenna wireless SonicWALL security appliances employ two 5 dBi antennas running
in diversity mode. The default implementation of diversity mode means that one antenna acts
as a transmitting, and both antennas act as potential receiving antenna. As radio signals arrive
at both antennas on the secure wireless appliance, the strength and integrity of the signals are
evaluated, and the best received signal is used. The selection process between the two
antennas is constant during operation to always provide the best possible signal. To allow for
external (higher gain uni-directional) antennas to be used, antenna diversity can be disabled.
The SonicWALL NSA 220 and 250M wireless security appliances employ three antennas. The
Antenna Diversity is set to Best by default, this is the only setting available for these
appliances.
The Antenna Diversity setting determines which antenna the wireless security appliance uses
to send and receive data. You can select:
• Best: This is the default setting. When Best is selected, the wireless security appliance
automatically selects the antenna with the strongest, clearest signal. In most cases, Best
is the optimal setting.
• 1: Select 1 to restrict the wireless security appliance to use antenna 1 only. Facing the rear
of the appliance, antenna 1 is on the left, closest to the console port. You can disconnect
antenna 2 when using only antenna 1.
• 2: Select 2 to restrict the wireless security appliance to use antenna 2 only. Facing the rear
of the appliance, antenna 2 is on the right, closest to the power supply. You can disconnect
antenna 1 when using only antenna 2.