Epson 802.11g Reference Manual page 28

When using TCP/IP or IPP for printing, you need to set the IP
address, the subnet mask, and the default gateway of the computer.
1. Click Start, highlight Control Panel, and then click Network
and Internet Connections. Select Network Connections.
2. Under LAN or High-Speed Internet, click the Local Area
Connection icon.
3. Under Network Tasks, click Change settings of this
connection.
4. Check if the following necessary components are in the list. If
they are already installed, see "How to Set Up the Network
Interface".
28