Epson C82346 - Manual (Page 17)

Installing in a printer
Before installing the Ethernet Card, see your printer manual
for instructions on installing the optional interface card; these
will be in the section on using printer options.
Note:
After installing the Ethernet Card, do not connect a cable to the
printer’s parallel port until after the card is booted and operating
(green status light on, red off). Otherwise, it may not boot properly.
For your own convenience, locate the hexadecimal serial
number on the component side of the card and write it here:
The serial number may be necessary for some software
installations to identify the Ethernet Card. When installing this
card on a Novell, EtherTalk, Windows NT (using TCP/IP), or
OS/2 NetBIOS network using the accompanying setup utility
software, this number is automatically recorded and displayed.
1-2 Installing the Ethernet Card