Edimax Technology EW-7205AP - Manual (Page 26)

Wireless LAN Access Point Configuration
24
Auto Rate Fall Back
When this is enabled the transmission rate is the optimum rate. In case of
obstacles or interference, the system will automatically fall back.
Authentication Type
Open System:
Any station in the WLAN can associate with an Access Point and
receive and transmitted data without authentication.
Shared Key:
Only stations using a shared key (WEP Key identified by the Access
Point) are allowed to associate with the Access Point.
Both:
Stations can communicate with the Access Point either with or without
data encryption.
Preamble Type
The preamble defines the length of the CRC block for communication
between the Wireless Access Point and the roaming Wireless Stations. The
Short Preamble option improves throughput performance.
Rx Antenna
Sets which antenna is used for reception. Select Diversity Antenna for the
Access Point.
Tx Antenna
Set which antenna is used for transmission. Select Diversity Antenna for the
Access Point.