"ChannelDtmfReceived" event doesn't emit when call receiver press the button

Asterisk Asterisk APIs
1

Hello, I have a project where i can make incoming and outgoing calls. I need to get the result of pressing the phone buttons. It works well when the call initiator presses the button, then “ChannelDtmfReceived” event emitted and i can get the digit. But when the button is pressed by call receiver, the “ChannelDtmfReceived” event doesn’t emit. What should i do to make the “ChannelDtmfReceived” event emit in both cases?

P.S.: I use ARI to create bridge and add channels. Also i tried to create bridge with type ‘mixing,dtmf_events’, but it didn’t help to solve my problem.

2

Have you verified that DTMF is actually being received from that party and that you’ve configured Asterisk to know the correct way?

3

Are you monitoring the correct channel (not the caller’s channel)?

4

Unfortunately, i am new with Asterisk and i don’t know how to configure it. It was configured by another guy and he told that DTMF should work for both cases. I can just verify the channel from which i receive DTMF, digit and duration in program code, but i don’t know how to verify DTMF with another way.

5

RFC based DTMF would show in “rtp set debug on” and in a packet capture. If Asterisk doesn’t see the DTMF or get it, then the ARI event would not occur.

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6

I just get the channel and the digit in the “ChannelDtmfReceived” event. Perhaps there is some configuration where I should specify for which channels I need to receive DTMF?

7

The events will occur for all channels, and if the channel is in the ARI application then it should be subscribed.

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8

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