Draytek vigor2920 series User Manual page 327

Item
Hide SSID
SSID
Isolate
Channel
Long Preamble
Packet-OVERDRIVE
Description
pre-defined in Applications >> Schedule setup. The default
setting of this field is blank and the function will always work.
Check it to prevent from wireless sniffing and make it harder
for unauthorized clients or STAs to join your wireless LAN.
Depending on the wireless utility, the user may only see the
information except SSID or just cannot see any thing about
Vigor wireless router while site surveying. The system allows
you to set four sets of SSID for different usage. In default, the
first set of SSID will be enabled. You can hide it for your
necessity.
Means the identification of the wireless LAN. SSID can be any
text numbers or various special characters. The default SSID is
"DrayTek". We suggest you to change it.
VPN – Check this box to make the wireless clients (stations)
with different VPN not accessing for each other.
Member –Check this box to make the wireless clients
(stations) with the same SSID not accessing for each other.
Means the channel of frequency of the wireless LAN. The
default channel is 6. You may switch channel if the selected
channel is under serious interference. If you have no idea of
choosing the frequency, please select Auto to let system
determine for you.
This option is to define the length of the sync field in an
802.11 packet. Most modern wireless network uses short
preamble with 56 bit sync field instead of long preamble with
128 bit sync field. However, some original 11b wireless
network devices only support long preamble. Check it to use
Long Preamble if needed to communicate with this kind of
devices.
This feature can enhance the performance in data transmission
about 40%* more (by checking Tx Burst). It is active only
when both sides of Access Point and Station (in wireless
client) invoke this function at the same time. That is, the
wireless client must support this feature and invoke the
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Vigor2920 Series User's Guide