Draytek Vigor2710 Series User Manual page 97

Hide SSID
Long Preamble
Packet-OVERDRIVE
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.
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 filed 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
function, too.
Note: Vigor N61 wireless adapter supports this function.
Therefore, you can use and install it into your PC for matching
with Packet-OVERDRIVE (refer to the following picture of
Vigor N61 wireless utility window, choose Enable for
TxBURST on the tab of Option).
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Vigor2710 Series User's Guide