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.
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.
- Problem description.
- Result of each step in the check list.
- GSM channel capture How to Get GSM Channel Capture and PCAP dump capture How To Get PCAP Dump Capture. (It’s better to include the same call in the 2 captures.)
- AT Command log How to Get AT Command Log.