Airlink AWLH1201 - Manual (Page 19)

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RTS:
The RTS/CTS Threshold is a station initiates the process by sending a
RTS frame , the other ends receives the RTS and responds with a CTS
frame, the station must receive a CTS frame before sending the data
frame. This is to prevent the collisions by each station. Choose a
setting within a range of 0 to 2432 bytes. It is recommend limiting a
long packet to prevent each station waiting too long to transmit a data.
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Power Save:
To set your WLAN PCI Adapter as power saving mode, select
“CAM”, “Max” or “Fast”.
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Use Short Preamble:
The usage of the preamble is to limit the packet size of the data to
transmit. It is recommended to choose the short preamble when the
link quality is bad, it is to prevent the wasting time of resending a long
packet that is lost.
When the setting is messy, press “Undo” button to recover to the last
setting, and press “Apply” to save the current setting.