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TC65i does not recognize the GSM network | Thales IoT Developer Community

abdelkader elheddi

July 7, 2020 - 10:54am, 296 views

Problem with TC65i

we have hundreds of modems having the TC65i module with SIM "Data 2g" and connected to specific equipment, each equipment sends hundreds of SMS every day through this modem, also, we can communicate to this equipment through this modem and read information from this equipment.

everything has been running perfectly for the past seven years.

currently, they have become unresponsive, when you put the chip in another type of modem it works normally, and when returned the SIM in the TC65i modem, it works for a period varying between 10 to 15 hours before stagnating ( indicates GSM absent, does not recognize the network).

the GSM network operator informs us that the SIMs have no problem.

we have modified some configurations with the AT commadnds but the problem persists.

help me please.