ZyAIR Wireless LAN Utility 
5-4                           Advanced Configuration 
Table 5-1 ZyAIR Utility: Advanced 
FIELD DESCRIPTION 
Transmit Threshold Control 
Fragmentation 
Threshold 
The threshold (number of bytes) for the fragmentation boundary for directed 
messages. It is the maximum data fragment size that can be sent.  
Move the slider to set the fragmentation threshold.  
RTS/CTS Threshold  Data with its frame size larger than this value will perform the RTS/CTS handshake. 
Setting this attribute to be larger than the maximum MSDU (MAC service data unit) 
size turns off the RTS/CTS handshake. Setting this attribute to zero turns on the 
RTS/CTS handshake.  
Move the slider to set the RTS/CTS threshold.  
Security 
Shared Mode 
(Authenticate Access 
Point) 
Select this checkbox to use a shared key to authenticate the access point. 
Refer to Section 5.1.2 for more information.  
Preamble Type 
Select a preamble type from the drop-down list menu. Choices are Long Preamble, 
Short Preamble and Auto.  
The default setting is Auto.  
Refer to Section 5.1.3 for more information.  
Restore Default 
Click Restore Default to reset all fields back to factory default values.  
Undo Changes 
Click Undo Changes to start configuring the fields again. 
Apply Changes 
Click Apply Changes to save the changes back to ZyAIR.