PART B: OPERATING THE TRACKBOX
56 OUTGOING CALLS AND MESSAGES
C i r c u m s t a n c e s w h i c h m a y
a f f e c t o n s e n d i n g s t a t u s m e s s a g e s
1. Power supply
-
Even when the device includes a continuous, fixed
power supply, it is possible the power source might run
down or be disconnected for a period of time because
of weather conditions or other circumstances (e.g.mis-
chief). For such situations, ensure that there is adquate-
ly charge left in the battery. Battery should never be
out-of-charge.
2. Message transmission errors
-
Deliveries of all messages, including MPTP messages,
are fully handled by and in the responsibility of the
GSM network operator and services can vary substan-
tially.
3.
Shadow areas
-
If the device is permanently installed in a location
where frequently occurs poor satellite coverage or
weak network signal, external GPS and/or GSM anten-
nas must be installed with the device. Shadow areas
may also occur momentarily, while moving from place
to place, especially in tunnels or valleys.
Positioning features
ACTIVITY TIMER PROCEDURE
1. The activity timer is activated as soon as the time set in
the
Start time
data field matches with the current time.
2. The device will be turned on. This automatic power-up
does not cause the LEDs to be lit.
3. According to configuration the position is calculated and
sent to the service center. For more information on con-
figuring activity timer, see
.
4. The device will then remain in idle mode for the pre-de-
fined time after which it will be turned off.
However, the power-down can be postponed by sending a
Location Request (?LOC)
message to the device. Postpon-
ing might be necessary for e.g. completing all ongoing
events before the power will be turned off.
All tracking messages, including ?LOC messages, override
the
Interval
time set in the
Activity timer
. For more informa-
tion on ?LOC messages, see below.
Summary of Contents for TRACKBOX 2.1
Page 6: ...6 ...