3Com 3C900B Installation And Operating Instructions Manual page 18

4. Find an empty ISA expansion slot at least
as long as the gold edge of your modem.
(ISA slots have black plastic grooves lined
with silver.) Unscrew and remove the
expansion slot cover (the long narrow piece
of metal that keeps dust from entering
through the opening perpendicular to the
slot). Be careful not to drop the screw into
the computer. You will need it later to
screw the modem into place.
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ODEM NSTALLATION WITH
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5. Holding the modem at each corner, with the
gold edge facing the slot, push the modem
down as gently as possible until it snaps into
the expansion slot. (NOTE: The drawings
show horizontally aligned expansion slots.
Some computers have vertically aligned
slots. The instructions apply to both styles.)
You need to apply a little pressure to seat
the modem properly. Sometimes a gentle
back-and-forth motion helps to fit the