DTMF Recognition Failure

Symptom

During the active call, the DTMF could not be recognized. The part mainly talks about the DTMF issue associated with the GSM trunk rather than the SIP trunk.

Checklist

1. Voice Issue. Check if you have voice issue first. Voice failure

2. DTMF input. Check if you have input the right DTMF.

If issue persists after finishing the checklist, please post us the following information via our support portal.

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