Epson C82310 - Manual (Page 10)

Some printers have a switch (or function) that allows you
to select between the optional and original interface. If
you install the C82310* interface card in this type of
printer, set the interface card’s DIP switch 2 to ON and
also change the setting in the printer to select the
optional interface.
Jumpers
A jumper is a small plug used for connecting or discon-
necting a circuit. The jumper is on when the jumper
plug covers both wires of the terminal. Jumper settings
can be changed by either attaching or removing the
rectangular jumper plug. If the jumper is to be turned
off, connect it to only one of the two terminal pins as
shown in the figure below. This prevents your losing the
unused jumper plug.
Figure 2. Jumpers
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