Grammar failing in AdhearsionIVR

[lpradovera]

Hello,
this is a pretty weird issue I have. Apparently, the same grammar works if generated and used by #ask, but does not if used inside AdhearsionIVR.

Working logs: https://gist.github.com/lpradovera/d60a9b127c3dc12cf5bf422c616652bd
Failing logs: https://gist.github.com/lpradovera/ec6341ab0e9d84a032d9c98c7f3b72cd

[bklang]

The error here appears to be unrelated to the grammar: the call was terminated because the SIP extension was not registered:

2016-12-15 07:41:20.571664 [NOTICE] switch_ivr_originate.c:2841 Cannot create outgoing channel of type [sofia] cause: [USER_NOT_REGISTERED]
2016-12-15 07:41:20.571664 [DEBUG] switch_ivr_originate.c:3829 Originate Resulted in Error Cause: 606 [USER_NOT_REGISTERED]
2016-12-15 07:41:20.571664 [DEBUG] mod_rayo.c:2816 dial: Failed to originate call: USER_NOT_REGISTERED
# ... SNIP
<end xmlns='urn:xmpp:rayo:1'><error platform-code='20'/></end><delay xmlns='urn:xmpp:delay' stamp='2016-12-15T15:41:20Z'/></presence>

[lpradovera]

Yes, but that is not related (I know that channel does not exist). I'll recheck without dialing first, but even if that works, it is still a bug, just not the same one :)

[lpradovera]

Newer logs, same issue: https://gist.github.com/lpradovera/d2562192a49c7537b5a821066b744cc7

[lpradovera]

Code I was using to reproduce, for reference:

  def run
    answer

    dtmf_grammar = RubySpeech::GRXML.draw root: 'main_menu_dtmf', mode: :dtmf, tag_format: 'semantics/1.0.2006' do
        rule id: 'main_menu_dtmf' do
          one_of do
            item { string '1'; tag { string 'out = "missing"' } }
            item { string '2'; tag { string 'out = "wet"' } }
            item { string '3'; tag { string 'out = "damaged"' } }
            item { string '8'; tag { string 'out = "repeat"' } }
            item { string '0'; tag { string 'out = "other"' } }
            item { string '*'; tag { string 'out = "other"' } }
          end
        end
      end

voice_grammar = RubySpeech::GRXML.draw root: 'yes_no', mode: :voice, language: 'en-US', tag_format: 'semantics/1.0.2006' do
        rule id: 'yes_no' do
          one_of do
            item do
              one_of do
                item { string 'yes' }
                item { string 'yep' }
                item { string 'yeah' }
                item { string 'correct' }
              end
              tag { string 'out = "yes"' }
            end
            item do
              one_of do
                item { string 'no' }
                item { string 'nope' }
                item { string 'nah' }
                item { string 'false' }
                item { string 'assistance' }
                item { string 'operator' }
                item { string 'representative' }
              end
              tag { string 'out = "no"' }
            end
          end
        end
      end

    result = ask "Enter your favorite number", grammar: [voice_grammar, dtmf_grammar], mode: :voice
    logger.debug result
    hangup
  end
end

[lpradovera]

From various conversations and digging, it does look like this is a problem with FreeSWITCH not supporting mixed mode grammars. I am just looking for a confirmation on that so we can tackle possible fixes.

[lpradovera]

This issue is caused by incorrect mod_unimrcp configuration in FreeSWITCH plus a minor bug in there. Not having telephone-event in the codecs for the MRCP profile causes DTMF not to be sent.
That would have fixed the issue if not for the fact that the module has a small bug in the codec parsing, where you also need to add PCMA to the codec line, this way:

<param name="codecs" value="PCMU PCMA telephone-event"/>

This allows LumenVox to receive the DTMF and parse it in mixed mode.

The other side of this is that Adhearsion must pass any as the recognition mode, which requires a change to AdhearsionIVR which I will implement later (issue is here adhearsion/adhearsion-ivr#25)