Wireless LAN – WLAN
52
3.4
Configuration of WLAN parameters
BAT54-Rail/F..
Release
7.54
06/08
D When the background scan time is '0' the background scanning func-
tion is deactivated.
The background scan interval sets the time period between searches by a
Wireless Router or Access Point for third-party WLAN networks within range.
The time interval allows the entered value to be defined in milliseconds, sec-
onds, minutes, hours or days.
Note: To avoid adverse effects on data transfer rates, the interval between
channel scans should be at least 20 seconds. Lesser values will be cor-
rected to this minimum value automatically. For example, with 13 chan-
nels to scan in the 2.4GHz band, one scan of the full spectrum takes at
least 13 x 20s = 260 seconds.
Note: Background scanning can be limited to a lower number of channels
when indoor mode is activated. This allows roaming for the mobile BAT
Wireless Router in client mode to be improved even further.
3.4 Configuration of WLAN
parameters
Changes to the wireless network settings can be made at various points in
the configuration:
D Some parameters concern the physical WLAN interface. Some BAT mod-
els have one WLAN interface, others have the option of using a second
WLAN card as well. The settings for the physical WLAN interface apply to
all of the logical wireless networks supported by this card. These param-
eters include, for example, the transmitting power of the antenna and the
operating mode of the WLAN card (access point or client).
D Other parameters are related solely to the logical wireless network that is
supported by a physical interface. These include, for example, the SSID
or the activation of encryption, either 802.11i with AES or WPA with TKIP
or WEP.
D A third group of parameters affect the wireless network operation, but are
not significant only to WLANs. These include, for example, the protocol
filter in the LAN bridge.
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