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6.4. Verifying the configuration
Despite the reliability of both configuration methods, either local or remote, it is
recommended to verify the configuration data stored in the module. This verification is
particularly important when the module does not appear to work in accordance with the
sent configuration.
In case of local method (with USB cable) the configuration should be read first and
then the values of parameters can be verified. The module configuration reading
method is described in the MTM program User Manual.
In case of remote method (with MTSpooler software) the configuration is
automatically read after each update. The user can access the current configuration
stored in the module and verify it on request.
7. Troubleshooting
7.1. LED signaling
The tree LEDs placed on the circuit board of the MT-703 module are a very useful
diagnostic tool. As it was mentioned previously, each LED has a specific function and its
name. Starting from the left, there are following diodes:
The GSM LED
The Status LED
The USB LED
The purpose of the GSM LED is informing the user about the GSM modem status.
Under a normal operation of the module, this LED indicates the change of a stand-by
mode into an active mode, using short single blinks. The single and a little bit longer
blink indicates a next step, when the GSM module is working and ready to activate the
communication port. This means that the module is ready to communicate with
configuration software, which is indicated by double blinks. Then triple blinks indicate
that the module has successfully logged in the GSM network. If GPRS transmission is
not configured, this moment indicates the end of the module activation. When the
GPRS transmission is enabled, the fourth, more longer blink appears, and it means
successful login to the selected APN.
The consecutive steps in transition from the stand-by mode to the active mode (when
the GSM/GPRS transmission is possible) are as follows:
1. No communication with the GSM modem
2. The GSM modem is running
3. The USB port of the MT-703 module is ready for communication
4. The GSM modem is registered in the GSM network
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