US Robotics Sportster Operating Instructions Manual page 30

this jack, disconnect the phone's cord from
the jack.
WARNING :
The phone jack you
use must be for an ANALOG phone line
(the type found in most homes). Many
office buildings have digital phone
lines. Be sure you know which type of
line you have. The modem will be
damaged if you use a digital phone line.
9. Plug one end of the phone cord included
with the modem into the TELCO jack at
the rear of the modem. Plug the other end
of the cable into the wall jack.
10. If you wish to use a phone through the
same phone wall jack as the modem when
the modem is not in use, plug your phone's
cord into the modem's PHONE jack.
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I M I
NTERNAL ODEM NSTALLATION WITH
W 95
INDOWS
NOTE:
You cannot use the modem
and a phone at the same time if they
share the same telephone line.
11. Plug the power cords, cables, and
peripherals back into the computer and turn
the computer on.