19
WT-216 USER MANUAL
WT-216 (V3) – USER MANUAL – Rev 1.0 – Technical Support:
Technical@witura.com
COPYRIGHT ©2009 WITURA CORPORATION SDN BHD
2.
Why
does
GSM
fail
to
communicate?
Check
if
the
SIM
card
is
opened
Check
whether
the
SIM
card
has
password
Check
if
the
SIM
card
is
correctly
placed.
Make
sure
the
SIM
card
does
support
GSM
function.
Make
sure
to
cut
off
power,
before
pulling
out
the
SIM
card.
If
the
vehicle
is
parked
in
a
place
where
the
GSM
signal
is
weak.
GSM
base
station
of
mobile
operator
is
crashing.
Whether
this
SIM
card
is
suspended
(such
as
forget
to
pay
the
bill…)
3.
Why
GPS
can
not
calculate
the
position?
Check
if
GPS
antenna
is
correctly
installed,
or
if
it
is
placed
in
a
proper
position.
Make
sure
there
is
not
be
any
metal
shield,
such
as
windshield
heat
insulation
paper
with
metallic
content,
above
the
GPS
antenna
‐
which
may
block
the
reception
of
GPS
signal.
Do
not
park
your
vehicle
under
shielding
or
under
a
building.
If
necessary,
put
the
GPS
antenna
outside
the
vehicle
temporarily.
4.
Why
does
GPS
positioning
take
such
a
long
time?
The
time
used
for
positioning
is
affected
by
many
factors,
such
as
the
weather,
distribution
of
clouds,
roadside
trees,
elevated
roads,
nearby
high
buildings,
heat
insulating
papers
containing
metal
elements,
and
even
the
covering
of
the
hands,
may
affect
the
reception
effect
of
satellite
signals.
Positioning
a
vehicle
in
an
idle
state
take
less
time
than
positioning
it
in
motion
state.
5.
Does
the
weather
affect
GPS
operation?
GPS
system
is
able
to
overcome
weather
problem
in
its
initial
design.
GPS
satellite
positioning
signals
consist
of
short
waves;
the
transmission
of
short
waves
will
not
be
affected
by
weather
conditions.
GPS
signals
may
produce
error
factors
during
transmission,
such
as
solar
wind,
earth
rotation,
and
variation
of
aerosphere
density,
building
reflection,
etc.
All
of
which
may
cause
deviations
to
GPS
short
wave
affect
signals.
But
weather
factors
will
not
affect
the
normal
function
of
GPS.
6.
Why
cannot
it
monitor?
Check
the
memory
for
SMS
messages
in
the
SIM
card,
to
see
if
it
is
full
or
not.
Cannot
receive
GSM
signal
in
the
place
where
you
locate.
