Reconnection failure on MC7455

We are using the Sierra MC7455 module with the generic firmware version SWI9X30C_02.24.03.00. The module is used on train board in an embedded PC (Windows 10 LTSB version) for railway application. The module is configured to use only one SIM with the command AT!USBCOMP=1,1,10D.

Sometimes we find that the radio module disconnects from the network and we can no longer resume it. The connection profile on the operating system Windows 10 is configured to connect to the network in automatic.

The SIM used is the Italian public operator TIM.

In attached we have some logs of AT command, AT+CSQ and AT!GSTATUS. At time 10:30:51,379 we can note that PS state: Not attached. After this event the module has never recovered communication.

Can you provide technical support or give us some tips to capture other types of logs?

Thank you.
Log_MC7455.txt (30.4 KB)

Hello,
This problem needs a detailed technical analysis. Please contact your Technical support in SWI to provide you the solution.

Thanks & Regards,
Moderator

Thank you for the answer.

What do you mean by SWI?

Hello,
SWI stands for Sierra Wireless.

Thanks & Regards,
Moderator