Chapter 6 – Troubleshooting
Your
modem
was
thoroughly
tested
at
the
factory
before
it
was
shipped.
If
you
are
unable
to
make
a
successful
connection,
or
if
you
experience
data
loss
or
garbled
characters
during
your
connection,
it
is
possible
that
the
modem
is
defective.
However,
it
is
more
likely
that
the
source
of
your
problem
lies
elsewhere.
The
following
symptoms
are
typical
of
problems
you
might
encounter:
●
None
of
the
LEDs
light
when
the
modem
is
on.
●
The
modem
does
not
respond
to
commands.
●
The
modem
cannot
connect
when
dialing.
●
The
modem
disconnects
while
online.
●
The
modem
cannot
connect
when
answering.
●
File
transfer
is
slower
than
it
should
be.
●
Data
is
being
lost.
●
There
are
garbage
characters
on
the
monitor.
●
The
modem
doesn’t
work
with
Caller
ID.
●
Fax
and
data
software
can’t
run
at
the
same
time.
None
of
the
Indicators
Light
When
you
turn
on
the
modem,
the
LED
indicators
on
the
front
panel
should
flash
briefly
as
the
modem
runs
a
self
‐
test.
If
the
LEDs
remain
off,
the
modem
is
probably
not
receiving
power.
●
Make
sure
the
modem’s
power
switch
is
on,
especially
if
you
normally
turn
the
modem
on
by
turning
on
a
power
strip.
●
If
the
modem
is
plugged
into
a
power
strip,
make
sure
the
power
strip
is
plugged
in
and
its
power
switch
is
on.
●
Make
sure
the
power
supply
is
firmly
connected
to
the
modem
and
the
power
supply’s
power
cord
is
firmly
connected
to
both
the
power
supply
and
the
wall
outlet
or
power
strip.
●
If
the
power
strip
is
on
and
the
modem
switch
is
on,
try
moving
the
power
supply
to
another
outlet
on
the
power
strip.
●
Test
that
the
outlet
is
live
by
plugging
another
device,
such
as
a
lamp,
into
it.
●
The
modem
or
power
supply
may
be
defective.
If
you
have
another
Multi
‐
Tech
modem,
try
swapping
modems.
If
the
problem
goes
away,
the
first
modem
or
power
supply
might
be
defective.
CAUTION:
Do
not
under
any
circumstances
replace
the
power
supply
with
one
designed
for
another
product;
doing
so
can
damage
the
modem
and
void
your
warranty.
The
Modem
Does
Not
Respond
to
Commands
●
Make
sure
the
modem
is
plugged
in
and
turned
on.
(See
“None
of
the
Indicators
Light.”)
●
Make
sure
you
are
issuing
the
modem
commands
from
data
communication
software,
either
manually
in
terminal
mode
or
automatically
by
configuring
the
software.
(You
cannot
send
commands
to
the
modem
from
the
DOS
prompt.)
●
Make
sure
you
are
in
terminal
mode
in
your
data
communication
program,
then
type
AT
and
press
E
NTER
.
If
you
get
an
OK
response
from
your
modem,
your
connections
are
good
and
the
problem
likely
is
in
the
connection
setup
in
your
communication
software.
24
Multi
‐
Tech
Systems,
Inc.
MT9234ZBA
‐
Series
User
Guide
