The issue here is mainly about GSM gateway. For S-Series, the SMS function is applied with SMS to Email and Email to SMS. Please refer to the specific troubleshooting guide.
Symptom
You could send or receive SMS on Yeastar device. Receiver could receive could your SMS. In the Outbox, you could see Failed SMS.
Checklist
Receiving SMS failure
1. SMS theory. Go to the first chapter to get basic understanding of the function. SMS Flow
2. GSM trunk registration. Check if your GSM trunk is registered or not.
3. SIM card balance. Check if your SIM card own enough balance.
4. Contact carrier. Contact carrier support to see what happened.
If issue persists after the checklist, please post us the following information via our support portal.
1. Problem description.
2. Result of each step in the check list.
3. System log (For S-Series only) with SMS option enabled How to Get System Log, AT Command log (optional for S-Series) How to Get AT Command Log.
Sending SMS Failure
1. SMS theory. Go to the first chapter to get basic understanding of the function. SMS Flow
2. GSM trunk registration. Check if your GSM trunk is registered or not.
3. SIM card balance. Check if your SIM card own enough balance.
4. SMS Center Number. Check if this number has been configured properly.
5. Receiver number. Check if the number is correct. You might miss the country code, +. You could use 00 to replace + to test.
6. Contact carrier. Contact carrier support to see what happened.
If issue persists after the checklist, please post us the following information via our support portal.
1. Problem description.
2. Result of each step in the check list.
3. System log (For S-Series only) with SMS option enabled How to Get System Log, AT Command log (optional for S-Series) How to Get AT Command Log.
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