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GSM/WCDMA/LTE signal.
3
)
Check if one device or all devices are offline in
the area . If all devices are offline, you should ask
operator If network is OK.
4
)
Check if SIM card has enough balance.
5
)
If device becomes offline on the last day of one
month, please check GPRS is closed or not.
6
)
Inquiry parameters of device via commands and
check replied parameters.
9.3 No positioned
If the GNSS is active, but device cannot be
positioned for long time, please check device:
1
)
If the vehicle is in the place where there is no
GNSS signal.
2
)
The upside of device should be installed with
face toward the sky.
3
)
The GSM/WCDMA/LTE and GNSS signal may
be weakened if device is installed in the place with
electromagnetic wave absorption material(such as
metal blocks), special attention should be paid if
there is metal thermal insulation layer or heating
layer on the front windshield, so that the position
accuracy will decline, and the severe ones will not
be positioned.
Summary of Contents for TK419 Series
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