Hello, I have a problem with the SMS service . The SMS service on the Rut950 is activated. The corresponding rule as well. If I send the router an SMS e.g. with the keyword reboot, then the router does not accept this command. If I call the router normally with a phone, it is always busy. The modem does not seem to accept the SMS call. Can you help me? Firmware and modem software is up to date. With kind regards Thomas Paech
Hello,
Before you try to use SMS or call commands, make sure that your mobile plan allows them. Some carriers only offer data plans for routers, so you might need to test the SIM card in your phone first. To send an SMS command, you need to use the format <admin_password> reboot. For example, if your admin password is admin01, you would send:
admin01 reboot
More information can be found here: RUT950 Mobile Utilities - Teltonika Networks Wiki
By default, calls are set to reject. This can be changed by configuring the call rules in the Services → Mobile Utilities → Call Utilities menu. Phone numbers can also be whitelisted here.
Best regards,
Hello, thanks for the quick reply, but I have already done the test with the SIM card in the phone. Ist’s ok. Also I made the setting of SMS service to " No authorization" and “From single number” with the entry of my mobile number in the white list. No success. The modem does not accept the SMS. 
regards
When i make a normal call from phone to modem, then the Modem are bussy and disconnected the Line Rapids.
Hello,
Just to clarify, have you configured a rule in call utilities? This is the intended default behavior of the device, thus a rule needs to be configured. Also, make sure VoLTE is enabled by navigating to Network → Mobile → General Settings;
As for SMS, please try sending an SMS, then navigate to System → Administration → Troubleshoot and open the System log. Copy the last few minutes of the logs and pate them in your next comment. Make sure to censor any sensitive information like phone numbers or IP addresses.
Best regards,
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