I could mean that the disconnect button was pressed or if they are using a physical phone that they hung up the phone. On the WebRTC, if the session is disconnect, is could show client as well. I suggest you get the console logs for a day and see exactly what the timeline is for the disconnect. It should show pretty clearly what is causing the disconnect.
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Robert Wakefield-Carl
Avtex Solutions, LLC
Contact Center Innovation Architect
https://www.Avtex.comhttps://RobertWC.Blogspot.com------------------------------