[BUG?] Teltronika RUT200 API send_ussd drops data connection

[LKH]

Hi all,

I’ve noticed an issue while testing USSD commands through the Teltronika API using an OpenVPN connection.

When I run a USSD command call, the Teltronika disconnects the data connection of the VPN.

Is this suppose to happen?

Firmware version:RUT2M_R_00.07.13.1

[Martynas]

Hello,

Apologies for a delayed response. To clarify, when executing a USSD command, the message is sent to the mobile operator, and the response can take up to 3 minutes. During this process, the network connection may temporarily fall back to a lower technology (3G/2G), which can impact the VPN connection.

Could you confirm whether the VPN tunnel reestablishes itself once the device reconnects to 4G?

Best regards,

[rut2]

Hi. I have a similar issue here. Firmware 0.7.11.3 works normally. After upgrading to 0.7.12.x I could not longer send ussd commands using the web interface. I downgraded to 0.7.11.3 and ussd works as expected now.
Perhaps the original bug reporter could downgrade to 0.7.11.3 and that might solve this issue temporarily.