Epson 802.11g Reference Manual page 160

WPA Settings
Items
Password
Password (again)
Detailed Settings
Items
RTS/CTS Handshake
Control
RTS/CTS Threshold
Value
Roaming Function
AP Density
160
Explanations
Enter the password for WPA-Personal
authentication (8 to 63 characters).
Enter the password again.
Explanations
Select either Enable or Disable. Select Enable to
avoid data collisions, known as "Hidden Station"
problem. When this is enabled, the station and
its access point use the RTS/CTS protocol. The
station sends an RTS signal to the access point,
notifying that it is going to send the data. When
the access point receives the RTS signal, it
responds with a CTS signal to all stations within
its range to require them to delay data
transmission.
Specify the threshold (number of bytes)
between 0 and 2347. Data with its frame size
larger than this value performs the RTS/CTS
handshake.
Enables or disables the roaming function.
To get the continuous connection of the same
access point, select Low. When you select High,
roaming around access points is made easy.
The network interface switches to the other
access point if it has a better radio wave
condition.