D-Link DW-120XX User Manual page 14

Encryption
By choosing this option in any of the two modes, you can set four different WEP keys
and specify which one of them to use. First, either enable or disable encryprion from the
appropriate "Encryption" field (see Figure 4-5 below). If you decide to use encryption,
you can choose any of the available WEP keys (1 to 4). You also have the option to
select the WEP mode (Mandatory/Optional). If you select "Mandatory", then not only
WEP will be used, but also any other station needs to use WEP encryption in order to
establish a communication with your station. This requirement is in line with the IEEE
802.11b standard. If, on the other hand, you choose "Optional", then your station can
communicate with every other station regardless if they use WEP or not. Please keep in
mind that the WEP keys must be in HEX format. Finally, you have the option to select
whether Open System or Shared Key authentication will be used. In order to take effect
the changes you wish to make, press the "Submit" button at the bottom of the screen.
Figure 4-5. Encryption
Advanced
By Choosing the Advanced option in any of the two modes, you can change advanced
configuration settings, such as the Preamble Type, Fragmentation Threshold, and
RTS/CTS Threshold (Figure 4-6). Figure 4-5 shows the recommended configuration for
the advanced settings. Before selecting Short Preamble, make sure that the other stations
and APs are also supporting this feature.
Note: The USB (A) card has an auto-detection feature therefore it automaticatilly
selects the Preable Type depending on the Access Point Preamble type. In
order to enable the Fragmentation and the RTS/CTS Threshold parameters
move the slide bar with your mouse and then use the right and left arrow keys of
your keyboard in order to select an exact number.
Figure 4-6. Advanced Settings