It looks more like the limitation on what you can do with the platform. You would need to contact Avaya Support and get some help on the platform.

I’ve made 3 calls and the results all point to a similar issue. Basically when I build a conference call and then I add a VXML dialog, the conference produces feedback into the IVR and it interrupts the speech recognition engine.

The first call I made 20210525_1736_100192231260210525-IncomingIdBargeIn.wav

Accept the incoming call.

create the conference and join the incoming caller

make an outbound call to another line (the recorder) 

join the 2 in a conference call.  

Initiate a VXML dialog using the incoming caller id

<dialogstart type="'application/voicexml+xml'" connectionid = "incoming_conn_id" src="'http://165.115.125.37:8443/CNRail_Driver/Start'" />

The IVR works fine, but the recorder does not hear the IVR side of the call. Meaning the recording is just my voice responding to the prompts.

We need to record both sides of the conversation.

The 2nd call is 2021-05-26-Ed-IR_100192231660210526-ConferenceIdWithBargeIn.wav

Accept the incoming call.

create the conference and join the incoming caller

make an outbound call to another line (the recorder) 

join the 2 in a conference call.  

Initiate a VXML dialog using the conference id so all parties should be able to hear the IVR

<dialogstart type="'application/voicexml+xml'" conferenceid = "conferenceid" src="'http://165.115.125.37:8443/CNRail_Driver/Start'" />

Bargein is enabled

bargeIn = true

What happens now if obvious, the IVR is constantly interrupted and the incoming caller does not have a chance to interact with the IVR.

The recording shows the only noise on the line is coming from the IVR, so we cannot blame the recording line because it is completely silent.

The only prompt that is played without being interrupted is the final error message, which had barge in disabled.

The 3rd call is 20210525_1738_100192231460210525ConferenceIdNoBargeIn.wav

Accept the incoming call.

create the conference and join the incoming caller

make an outbound call to another line (the recorder) 

join the 2 in a conference call.  

Initiate a VXML dialog using the conference id so all parties should be able to hear the IVR

<dialogstart type="'application/voicexml+xml'" conferenceid = "conferenceid" src="'http://165.115.125.37:8443/CNRail_Driver/Start'" />

The difference is that I changed the IVR so bargein is disabled.

bargeIn = false

What happens now shows that it worked.  Since the IVR is blocking barge in, the prompts are played in full and once the prompt is completely over the incoming caller can respond to the IVR with the correct answers, and the call continues normally.  This also indicates that the recording is not adding any noise to the conversation, because if it was, then this prompt would be interrupted.  

But we cannot have call #3 to be the solution. We need barge in enabled and we need the recorder line to record both sides the conversation.

Ed.

here are the recordings

You have to bring this case to Avaya Support and let them take a look at it on the platform side. There is not much I can do on this forum.