Question

Hi,

I am using a TRB140 with TRB1_R_00.07.04.1  Firmware. I've installed a new vodafone OneNumber sim card, known as Multi-Sim or UltraCard. The Dashboard shows that the modem is connected and everything is fine. As soon as I try to send a SMS via WEBUi or HTTP Get, the modem disconnects from Vodafone. Even when I try to check with a dial code via CLI, the modem disconnects and I get the following response in CLI: "No Carrier".

Is there anything I can check?

Thanks in advance

BR
Kay

Answer 1

Hello,

  

This is most likely caused by your carrier using circuit-switching instead of packet-switching, which would explain this behavior.

If that does not help, you could try forcing the device to use packet switching by logging into the CLI, and running this command:

gsmctl -A 'AT+CGSMS=0'

If you are not able to send an SMS after changing this option, it means that your carrier does not support packet-switching. In this case, there is not much that can be done. To revert the changes caused by this command, run this command:

gsmctl -A 'AT+CGSMS=2'

  

Best regards,
DaumantasG

Comments

Hi and thanks for your replay,

it turns out, that on this multi-sim card the SMS option was disabled. I had to activate the SIM in a mobile phone for SMS receiving and now it is working in the Gateway.

BR
Kay