Telemetry Module MT-021 User Manual

whether transmission is still possible. The frame is sent to the
address specified by parameter GPRS testing IP address, if
different than 0.0.0.0.
Lack of reply to sent ping frame after exercising defined
timeout and number of retries is considered as GPRS
connection loss and resets modem.
6.2.5. Authorized numbers
Group Authorized numbers comprises lists of phone numbers the module is going to
communicate with.
6.2.5.1. Number of phone numbers
Function - Defines the length of phone numbers list authorized to
exchange SMS messages.
Data type - Number
Range - 1…32
Default value - 1
Comments - The value of this parameter may vary as the result of
adding/deleting when using the context menu operating
directly on Phone number. The module will communicate
only with units with the phone number present on the list.
Read more in Syntax for reading and writing data in SMS
mode chapter of Appendices.
6.2.5.2. Update phone numbers from SIM card
Function - Enables synchronization of Authorized numbers\Phone list
with phone book saved on Defines the length of phone
numbers list authorized to exchange SMS messages.
Data type - selection list
Range - Yes
synchronization is on
No
synchronization is off
Default value - No
Comments - Synchronization is done after every reboot of the module,
after inserting the SIM card or when configuration is written to
the module.
The module browses SIM card phone book and if it finds
entries of the same name as defined in the Authorized
numbers\Phone it overrides the numbers from configuration
with the numbers from the SIM card.
Those numbers are remembered till module restart.
6.2.5.3. Phone number from SIM card always authorized
Function - Enables receiving voice calls authorization for all phone
numbers stored in SIM card phone book.
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