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Troubleshooting
J
When
you
have problems
transmitting data (garbled data,
intermit-
tent errors,
etc.),
there are
a few
checks
you
can
make
before taking
the unit to
a
Radio Shack
service technician:
•
Phone
connection
is
clean
and
noise-free.
•
No
one
is
talking
on
the
telephone
line.
•
Phone and
all
extensions are
on
the
hook.
•
Operation speed
is
correct for the
Modem
you
are
using
and
the
modem
with
which you
are
communicating.
Note:
It
is
very
unlikely
.
.
.
but
if
your
Modem
causes
problems
on
the
phone
line,
the
telephone
company
has
the
right to
tem-
porarily
discontinue
your
service.
If this
happens,
the telephone
company
will
notify
you and
give
you
a chance
to
have
the
problem
corrected.
Also, the
telephone
company
has the
right
to
make
changes
in their
lines
and/or equipment.
If
these
changes
affect
your
Modem
or require
changes
in
its
connec-
tion,
the
phone
company
will
notify
you
in writing
so
you
can
take the necessary
steps to
ensure uninterrupted
service.
Maintenance
The
only
maintenance your
DCM
212
requires
is
a
periodic
checking
of
cables
and
connections.
When
you
experience
data
transfer
problems,
first
check
the cable connections.
Then, run
the
analog loop
self-test.
If
you
still
experience problems,
check with your Radio Shack
Com-
puter
Center
or
store.
Precaution
Lightning,
Your
DCM
212 has
built-in
protection
circuits
that
meet
or
exceed
FCC
requirements to reduce
risk
or
damage
from
surges in
tel-
ephone
line
current.
However, an
incident
such
as
a
lightning
strike
near,
or
directly
to,
the
telephone
line
may
cause
an
excessive
surge
of
voltage that
can
damage
the
phone
device.
Lightning
damage
is
uncommon,
but
can
occur
to
phones and
other
electronic devices. If
you
are
concerned about
it
or
live
in
an
area with
frequent
and/or
severe
electrical
storms,
it
is
suggested that
you
un-
plug
the
electronic
products during
storms.
83
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