Astak R4020A - User Manual - Manual (Page 24)

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Preamble Type
The preamble type defines the length of CRC blocks in the frames
over the wireless communications. You may select “Short
Preamble” when there is a large network-flow.
The default is “Long Preamble”.
IAPP
Inter-Access Point Protocol (IAPP) is used to solve the problem of
switching the access points by the wireless clients.
The default is “Enabled”.
Protection
Select “Enabled” to use the wireless protection mechanism.
The default is “Disabled”.
Aggregation
This function is used to reduce the blocking in a large data transfer
by aggregating multiple packets to one.
The default is “Enabled”.
Short GI
This function is used to increase the data capacity by reducing the
Guard Interval (GI) time.
The default is “Enabled”.
WLAN Partition
This function is used to prevent associated wireless clients from
communicating with each other.
The default is “Disabled”.
STBC
Space-time block codes (STBC) can improve system capacity and
spectral efficiency.
The default is “Disabled”.
20/40MHz Coexist
Select “enabled” to use a mixed channel width of 20MHz and
40MHz.
The default is “Disabled”.
RF Output Power
Radio Frequency (RF) Output Power is used to control the signal
strength of the wireless network. It can be decreased to 70%, 50%,
35% or 15%.
The default value is 100%.
*It’s recommended to keep the default values unless you know exactly the effect will
be brought to this router by changing the parameters.
After setting the parameters, please click the button to save the
configurations, or click the button to reset the configurations before you
changed them.