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No DTMF in Voicemai


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ever since we upgraded to versino.3120 any grandstreams phone in our enviornment are unable to send dtmf in voicemail menu...DTMF works when calling other phone numbers.


There is probably a problem with the DTMF codec negotiation. Try the latest Grandstream firmware or try setting the codec on the phone to 101, that's the codec the PBX will propose.

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