Epson 802.11g Reference Manual page 3

Some screen shots in this guide may list a device name other than
your device. This difference does not alter the instructions.
Instructions on Using the Network Interface
Notes on powering on and off
Do not turn off the device and the network interface when
changing the settings. This may damage the device and the
network interface.
Do not turn off the device and the network interface while
printing is in progress. This may cause operational trouble to
the computer sending the print data and suspend the printing
process.
Do not turn off the network interface during a firmware
update. Otherwise, the update cannot be completed correctly
and the network interface may not turn on (may not work)
after the update.
Notes on USB connection
Only supported devices can connect to a USB downstream
connector of the network interface. Do not use a USB hub.
Only IBM compatible computer or Macintosh equipped with
USB can connect to a USB upstream connector of the network
interface.
Notes on security
WEP Key
Set a WEP Key or WPA-PSK to prevent wireless interception
by unauthorized persons. The wireless transmission speed is
reduced when WEP or WPA-PSK is enabled because time is
required for encryption and decryption.
3