Asus B and W PCI CARD - Manual (Page 39)

38 ASUS SpaceLink B&W PCI Card
Chapter 3 - Wireless LAN Reference
Chapter 3
Click Apply to save and activate the new configurations.
Scan Mode
Allows selection of the wireless card scanning method used to locate access
points or ad hoc networks. The default value is Auto.
Passive: Click on this radio button to specify passive scanning. Passive scanning
indicates that the wireless card is in listen-only mode.
Auto: Click on this radio button to specify automatic scanning. The driver
uses the country code to determine which type of scanning to use, either active
or passive.
QoS
Specifies disable or enable the station to cooperate in a network using Quality
of Service (QoS).
2.4 GHz Preamble
Specifies Short & Long or Long-Only preamble mode for a 2.4 GHz/11 Mb
network. Long-Only is used for backward-compatibility with older 2.4 GHz
devices. The default value is Short & Long.
RTS Threshold
Define the size packet that the station used for RTS/CTS handshake boundary.
Be aware that setting the minimum size packet too small causes RTS packets
to be sent more often, adding excessive overhead to the network, therefore
decreasing network utilization. However, the more often RTS packets are sent,
the more transmission collisions can avoid. That's trade-off. RTS Threshold
ranged from 0 to 2346 steps 64. The default value is 2346.
Fragmentation Threshold
Define the number of bytes used for fragmentation boundary. If the length of
the data unit exceeds this parameter, it will be divided into smaller fragments
for transmission. Each of the fragments is sent independently. If there is a
significant interference present, set the fragment size smaller. Otherwise, set
the fragment size larger. Because send multiple frames lead to overhead on the
network. Fragmentation Threshold ranged from 256 to 2346 steps 128. The
default value is 2346.