Twilio SIP Trunking DTMF not recognized

Hi,

I’m working with Asterisk from few days and I have problem with one of the cases. I am out of ideas so I hope you can help me. First I will explain what I want to achieve. I want to make a call using ARI (this is working) and I would like to get DTMF from device. For testing purposes I use X-Lite (5.2.0). I set up G711 ulaw codec and DTMF 2833 for it. Regarding Asterisk I use 15.1.5 on MacOS with Twilio SIP Trunking.

pjsip.conf

[transport-udp]
type=transport
protocol=udp
bind=0.0.0.0:5061

[twilio-trunks](!)
type=endpoint
transport=transport-udp
context=from-twilio
disallow=all
allow=ulaw
dtmf_mode=rfc4733

[auth-out](!)
type=auth
auth_type=userpass

[twilio0](twilio-trunks)
aors=twilio0-aors
outbound_auth=twilio0-auth

[twilio0-aors]
type=aor
contact=sip:some-name.pstn.twilio.com:5060

[twilio0-ident]
type=identify
endpoint=twilio0
match=54.172.60.0
match=54.172.60.1
match=54.172.60.2
match=54.172.60.3

[twilio0-auth](auth-out)
password=password
username=user

extensions.conf

[default]

exten => 1000,1,NoOp()
 same =>      n,Stasis(my-app)
 same =>      n,Hangup()

My ruby code

    @client = Ari::Client.new(
      url: 'http://127.0.0.1:8088/ari',
      api_key: 'user:password',
      app: 'my-app'
    )

    @client.on :stasis_start do |e|
      puts "Start stasis for channel #{e.channel.name}"

      e.channel.on :stasis_end do |e|
        puts "Channel #{e.channel.name} left Stasis."
      end

      e.channel.on :channel_dtmf_received do |e|
        puts "Digit pressed: #{e.digit} on channel #{e.channel.name} !"
      end
    end

    @client.connect_websocket

    channel = @client.channels.originate endpoint: 'PJSIP/+1#{phone_number}@twilio0', extension: 1000

So the problem is that when I answer the call and I click on any digit on the dial pad I don’t receive message from channel_dtmf_received event. I don’t know if this can be a problem with X-Lite, with Aterisk configuration or Twilio configuration. I will be grateful for any advice.

Use tcpdump/wireshark to see if the DTMF is being sent, and enable DTMF logging, in Asterisk, to see if it is being recognized.

Thank you for the answer @david551. I think DTMF message is send properly. At least I see in wireshark that it is going from asterisk to twilio

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Any other suggestions?

Asterisk DTMF Log, as already requested.