The unit is currently used in the USA.
I want to send Sms messages.
I tested the Sms feature in the Netherlands with my mobile phone number, starting with the country code 0031612345687, this worked OK.
Now our customer inserted their sim card and I can read the operator name: AT&T and the signal strength is -58dBm (excellent).
The Sms needs to be send to phone number 304-123-1234, so they use 0013041231234.
Here it goes wrong, as soon as they send the Sms the unit goes in error.
Ensure that the phone number is in the correct international format. For U.S. numbers, you should use the format 001 followed by the area code and number, which you’ve done (0013041231234). However, it’s crucial to ensure that the number is correctly formatted and recognized by the device.
Although you’ve confirmed a strong signal strength, it’s possible that there are issues with the SIM card or network connectivity. Check if the SIM card is properly inserted and if there are any restrictions on sending SMS messages from the SIM card.
Ensure that the RUT241 is properly configured for SMS sending. Check the Mobile Utilities page on the device’s web interface to confirm that SMS sending is enabled and configured correctly).
Ensure that your device is running the latest firmware. Outdated firmware might cause compatibility issues with certain networks or features.
Try sending an SMS to a different U.S. number to see if the issue is specific to the recipient’s number or a broader problem.
Ensure that the AT&T SIM card allows international SMS sending if necessary and that there are no restrictions on the account.
Here’s an example of how to send an SMS using the RUT241’s HTTP interface: