Problem with the voice call

Hello.

I use GSM-module WISMO228. I can call, send and receive SMS. But there is problem with several SIM-cards.

  1. Periodically I send AT-command^
AT+CREG?
+CREG: 1,1
OK

AT+CREG?
+CREG: 1,1
OK

And this is working OK.

  1. Then I’m trying to make voice call: (instead of x there is real numbers)
ATD+7916хххххх;
  1. Then I’m waiting answer, but the module is silent.

  2. Then I send command from paragraph 1:

AT+CREG?
ERROR
ERROR
ERROR

That is module answer ERROR for each command.
There is only one way to exit from this state, this is reset the module.

How can I make the voice call, if AT-command ATD not working?
How can I detect this type of SIM-card?

Thank you.

Hi,

What error code is coming?

You can enable error code using AT+CMEE=1

Thanks

Hi,

Topic moved to the correct section.

Error code is already enabled. There isn’t any code.
By the way, module send ERROR after any AT-command until reset it.

I connect to module with Sierra Wireless Discovery Tool and tried to make voice call.
The situation repeated itself.

Hi.
The problem was solved by updating firmware from version L20 to version L23.

Hi Man, You will have to share the L23a firmware and the process of how to update it, thanks