SanDisk Wireless LAN Card - Manual (Page 50)

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RTS Threshold
Request to Send threshold (RTS Threshold) is a query for permission to
transmit data to an access point. Enabling this option prevents the data of two
wireless devices from arriving at the access point at the same time (colliding).
If two wireless transmissions collide at the access point, the data in each
transmission will be lost.
Transmission collision usually occurs when two wireless devices are within
range of the same access point, but are not within range of each other. In
effect, they are hidden from each another.
When RTS Threshold is enabled, the wireless device sends a Request to
Send message to the access point before transmitting data. The access point
returns a Clear to Send message to the wireless device confirming the
amount of time reserved for the transmission. At the same time, the access
point notifies all other wireless devices in range to defer transmission.
To enable RTS Threshold, select the Enable radio button.
Enter a packet size between 0 and 1500 in the text frame to the right of
the Enable button. This option should be used only when necessary.
The default setting for RTS Threshold is Disable. Enabling the RTS Threshold
burdens the network and will negatively affect its performance.
Frag. Threshold
Fragmentation is used to improve the efficiency of transmitting large files
(packets) across a wireless network. When Frag. Threshold is Enabled, large
files are be split before they are transmitted and reassembled at the access
point. The fragmentation value can be set from 256 to 1500.
The default value of Frag. Threshold is Disable.
IRQ NO.
This option is only available for Windows NT.
The IRQ (Interrupt Request Line) number specifies which hardware line a
device uses to send signals to the CPU of the device. To avoid conflict
between devices, you can select a specific IRQ number in the IRQ drop down
menu.