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5.3
Security info
In security section user can see SIM card and configurator keyword security information.
▪ The state and status of currently connected SIM card can be observed here. If a SIM card
with PIN code is used, user can enter it in this section. The remaining attempts to enter
PIN code are shown as well.
▪ When SIM PIN code is entered correctly user can change PIN code or disable it from the
SIM card. When SIM PIN is disabled and user would like to enable it again, user must
enter the previously used PIN code.
▪ Configuration security keyword can be set to configurator. Keyword can be saved in
configuration file (.cfg), so there is no need to connect the device to the configurator to
configure the keyword. Minimum keyword length is 4 symbols and maximum length is 10
symbols. Only uppercase and lowercase letters and numbers are supported. Keyword can
be configured to .cfg configuration file when the device is not connected.
5.4
System settings
System settings have following configurable parameters:
▪ Sleep Settings, where user can choose sleep mode;
▪ Static Navigation Settings, where user can turn static navigation on or off;
▪ Records settings, where user can enable or disable records when GPS is not available (no
time synchronization);
▪ GNSS Source settings, where user can choose the necessary satellite system(s);
▪ Power On By USB/Charger. Device supports two working modes: normal mode, where the
device works as usual, and charging mode, which is entered when Power On By
USB/Charger parameter is disabled. To enter normal mode, device can be turned on by
power button or by USB charger, if Power On By USB/Charger parameter is set to Enable.
▪ Movement Settings, where user can configure movement start and stop delay values (in
seconds);
▪ Time Synchronization settings, where user can choose which source(s) to use for TMT250
time synchronization. User has a choice to: use only one synchronization source (Disable
(GPS only)), allow synchronization from both the GNSS and NTP server (NTP), select
synchronization through GNSS and GSM operator (NITZ) or from all three sources (when
NITZ+NTP is selected). User can select which NTP server (it is possible to configure up to
two servers) and what time period to use to resynchronize time.
GPS Power Saving functionality is present on TMT250. Its purpose is to reduce power
consumption and its main function is to turn off the GPS module when the device is stationary.
For power saving functionality to run several conditions need to be met: Min Period value in Data
Acquisition is more than or equal to 60 seconds and GPS search period in System must be set
between 5 and 300. In device cold start state the GPS module is turned on for 180 sec. If GPS fix
is obtained before this timeout elapses, GPS module turns off and a record is saved, and if not,
no record will be saved. Before each new record saving period is expired the device is constantly
checking for movement and if no motion has been detected, the GPS module does not turn on
and the device waits for a periodic record to be eventually saved. If motion is detected at least
15 seconds before the record saving action, the GPS module will be turned on. If Records
Saving/Sending Without TS configuration is set Always or After Time Sync a periodic record is
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